Event calendar file
13-16 September 2023
University of Warsaw, Faculty of Physics
Europe/Warsaw timezone
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86
Session:
Parallel Session 1
Two-Higgs-doublet models are among the simplest extensions to the Standard Model (SM). The augmented parameter space that comes with the addition of a second Higgs doublet allows them to possibly solve some of the shortcomings of the SM, and opens the window to a plethora of new phenomena to be discovered. The introduction of scalar-mediated tree-level flavour-changing neutral currents may be tack
... More
Presented by Antonio COUTINHO
on
15 Sep 2023
at
15:00
Session:
Plenary Session 6
I will discuss a simple model of inflection-point inflation, with a renormalizable potential containing just three terms. In the small-field case the inflationary phase can be treated analytically, but reheating involves nonperturbative dynamics. In the large-field case reheating is simple, and the inflationary phase may include two epochs of "eternal" inflation, with quite different Hubble parame
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Presented by Mr. Manuel DREES
on
14 Sep 2023
at
12:00
Session:
Parallel Session 3
We analyze new signals of a 3-Higgs Doublet Model (3HDM) at the Large Hadron Collider (LHC) where only one doublet acquires a Vacuum Expectation Value (VEV), preserving a parity Z2. The other two doublets are inert and do not develop a VEV, leading to a dark scalar sector controlled by Z2, with the lightest CP-even dark scalar H1 being the DM candidate. This leads to the loop-induced decay of the
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Presented by Dr. Atri DEY
on
15 Sep 2023
at
13:45
Session:
Parallel Session 1
The N2HDM has two doublets and a real singlet. If one abandons the Z2 symmetry under which the singlet is odd, then there is a region of parameter space in which there is a phase during the electroweak transitions in which U(1)_em is broken. This leads (temporarily) to a photon mass and charge nonconservation, which implies W-photon, top-bottom and neutrino-electron mixing (and even leads to
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Presented by Marc SHER
on
15 Sep 2023
at
13:30
Session:
Parallel Session 2
This talk reviews the essential features and the phenomenology of single-field inflationary scenarios that can produce large spectral features resulting in the production of primordial black holes. This talks presents simple analytic set-up capable of capturing the features present in most models in the literature. We also discuss less common scenarios for PBHs such as inflation from double well p
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Presented by Dr. Niko KOIVUNEN
on
15 Sep 2023
at
14:30
Session:
Parallel Session 1
Axion is one of the prominent candidates of dark matter (DM).
In particular, the axion in the keV scale is phenomenologically interesting.
Because given that the axion has an interaction with electrons, it can be probed by electron recoil events in DM direct detection experiments.
We construct a concrete renormalizable model that predicts axion DM in keV scale, three Higgs doublet model with
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Presented by Dr. Kodai SAKURAI
on
15 Sep 2023
at
13:45
Session:
Parallel Session 4
I discuss the two-Higgs doublet model extended by a complex singlet and an additional U(1) gauge group (N2HDM-U(1)) and compare it to the standard two-Higgs doublet model with Z2 symmetries (N2HDM-Z2). We show that the N2HDM-U(1) is more predictive as it has one less free parameter, is CP conserving, and involves only spontaneous symmetry breaking. We then examine the phenomenological consequences
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Presented by Sumit BANIK
on
15 Sep 2023
at
16:45
Session:
Parallel Session 3
FlexibleSUSY is a tool allowing to study phenomenology of user defined (both supersymmetric or not) BSM models. In a recent update we have extended it by adding the possibility to compute scalar decays. Building on that work, in this talk I will present an interface between FlexibleSUSY and HiggsTools - a library allowing to confront predictions for Higgs sectors with experimental data. As an appl
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Presented by Dr. Wojciech KOTLARSKI
on
15 Sep 2023
at
14:30
Session:
Plenary Session 1
The ongoing LHC Run 3 has initiated a novel BSM and neutrino physics program at the LHC in its far-forward region. While dedicated detectors FASER and SND@LHC are already taking data, this could be further significantly extended during the HL-LHC era with the proposed Forward Physics Facility (FPF). In the talk, I will summarize the physics opportunities of this new research direction, emphasizing
... More
Presented by Dr. Sebastian TROJANOWSKI
on
13 Sep 2023
at
10:00
Session:
Parallel Session 5
We propose a novel framework where baryon asymmetry can arise due to forbidden decay of dark matter (DM) enabled by finite temperature effects in the early universe. In order to implement it in a realistic setup, we consider the DM to be a singlet Dirac fermion which acquires a dark asymmetry from a scalar field $\Phi$ via Affleck-Dine mechanism. Due to finite-temperature effects, DM can decay in
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Presented by Dr. Debasish BORAH
on
15 Sep 2023
at
17:00
Session:
Parallel Session 1
Detecting symmetries in multi-Higgs doublet models (NHDM) is a challenge due to the basis freedom of these models. To overcome this, a formalism based on relations among basis-covariant objects has recently been tried in the 3HDM. Within this framework we show using representation theory that simple necessary and sufficient conditions for custodial symmetry, verifiable in any basis, can be derived
... More
Presented by Mr. Robin PLANTEY
on
15 Sep 2023
at
14:15
Session:
Parallel Session 9
We discuss the production of primordial gravitational waves (GW) from radiative inflaton decay during the period of reheating, assuming perturbative decay of the inflaton either into a pair of bosons or fermions, leading to successful reheating satisfying constraint from Big Bang nucleosynthesis. Assuming that the inflaton $\phi$ oscillates in a general monomial potential $V(\phi)\propto \phi^n$,
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Presented by Mr. BASABENDU BARMAN
on
16 Sep 2023
at
09:45
Session:
Plenary Session 4
CP violation plays a very important role in nature with implications both for Particle Physics and for Cosmology. Accounting for the observed matter–antimatter asymmetry of the Universe requires the existence of new sources of CP violation beyond the Standard Model. In models with an extended scalar sector CP violation can emerge either explicitly, i.e., at the Lagrangian level, or spontaneously
... More
Presented by Margarida (Gui) N. REBELO
on
13 Sep 2023
at
16:30
Session:
Parallel Session 4
In extended Higgs models, the nearly-alignment scenario is phenomenologically interesting and consistent with the current LHC data. In the nearly-alignment case, it is known that a wide parameter region is expected to be surveyed by "Higgs to Higgs decays" in direct searches of the additional Higgs bosons. We comprehensively investigate the impact of NLO electroweak and NNLO QCD corrections to bra
... More
Presented by Dr. Mariko KIKUCHI
on
15 Sep 2023
at
17:00
Session:
Plenary Session 10
The motivation for conformal extensions of the Standard Model will be presented, followed by specific realizations and extensions to include gravity.
Presented by Prof. Manfred LINDNER
on
15 Sep 2023
at
11:00
Session:
Parallel Session 5
Composite Higgs theories often suffer from predicting light top partners, which are excluded by collider experiments. In the recently proposed SU(6) Gauge-Higgs Grand Unified Theory by Angelescu et al., where the Higgs boson emerges as a pseudo-Nambu Goldstone boson of the coset SU(6)/SU(5), the embedding of the elementary Standard-Model fermions naturally gives rise to additional vector-like exot
... More
Presented by Ms. Maya HAGER
on
15 Sep 2023
at
16:00
Session:
Parallel Session 3
One simple way to lower the scale of the seesaw mechanism that generates neutrino masses is to attribute part of their smallness to a suppressed vacuum expectation value of a second Higgs doublet as in the neutrinophilic 2HDM or similar. On that structure we add one charged singlet scalar to induce a chirally enhanced contribution to (g − 2)μ with the same righthanded neutrinos of the seesaw. W
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Presented by Prof. Celso C. NISHI
on
15 Sep 2023
at
13:30
Session:
Plenary Session 5
Particles with only gravitational interactions with the standard model may be created by the expansion of the universe. Thus, it is possible to produce a particle species with only gravitational interactions and with a mass much in excess of the maximum temperature of the radiation dominated universe.
Presented by Prof. Edward (Rocky) KOLB
on
14 Sep 2023
at
09:00
Session:
Plenary Session 13
I will describe how some of the fine-tuning problems of the early dark energy solution to the Hubble tension can be addressed using couplings to other fields already present in cosmology. I will discuss the formulation, the cosmology, and the constraints on such models, arising from both observational and theoretical considerations.
Presented by Mark TRODDEN
on
16 Sep 2023
at
16:30
Session:
Plenary Session 6
For thermal-relic dark matter in the multi-TeV regime, the formation and decay of metastable bound states can deplete its abundance significantly, thereby changing the predicted correlation between couplings and mass and affecting all experimental signatures. This effect is important if dark matter couples to vector force carriers, but becomes dramatic if dark matter couples to scalar mediators th
... More
Presented by Dr. Kalliopi PETRAKI
on
14 Sep 2023
at
11:30
Session:
Plenary Session 4
We show how the gg->h(SM)h(SM) process at the LHC can be used to test new low-scale physics affecting the EW sector and described a novel numerical approach to perform phenomenological tests of various models, taking Supersymmetry and Compositeness as prototypical examples.
Presented by Prof. Stefano MORETTI
on
13 Sep 2023
at
17:30
Session:
Parallel Session 3
In this talk, we show that two WIMPs produced in the decay chains having sufficient mass splitting can yield a double peak in missing energy or missing transverse momentum distribution of multilepton/multijet signal. We argue that these peaks can be distinguished in terms of height and separation by some carefully crafted kinematic variables. For mono-X signal however, such double peak behavior ar
... More
Presented by Prof. Subhaditya BHATTACHARYA
on
15 Sep 2023
at
15:00
Session:
Parallel Session 2
We have shown that the process of non-instantaneous reheating during the post-inflationary period can have a sizeable impact on the charged lepton equilibration temperature in the early Universe. This suggests revisiting into the flavor effects of leptogenesis where the production and decay of right-handed neutrinos take place within this extended era of reheating. We observe that the decay of th
... More
Presented by Prof. ARUNANSU SIL
on
15 Sep 2023
at
15:00
Session:
Plenary Session 7
We develop methods to study the scalar sector of multi-Higgs models with large discrete symmetry groups that are softly broken. While in the exact symmetry limit, the model has very few parameters and can be studied analytically, proliferation of quadratic couplings in the most general softly broken case makes the analysis cumbersome. We identify two sets of soft breaking terms which play differen
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Presented by Dr. Ivo DE MEDEIROS VARZIELAS
on
14 Sep 2023
at
15:00
Session:
Plenary Session 5
I will discuss the freeze-in dark matter production mechanism at low reheating temperatures, which can naturally be probed by direct detection searches.
Presented by Oleg LEBEDEV
on
14 Sep 2023
at
10:00
Session:
Plenary Session 8
I will discuss the state-of-the-art of predicting a stochastic background of gravitational waves produced by cosmological first-order phase transitions. I focus on recent developments in understanding the dynamics of the primordial fluid after percolation and how to connect simulation results to observations and model building. Finally, I discuss the possibility to interpret the NanoGrav excess wi
... More
Presented by Thomas KONSTANDIN
on
14 Sep 2023
at
16:30
Session:
Parallel Session 2
In this talk, I will analyse a super-cooled phase transition in the early Universe responsible for the generation of elementary particles' masses. I will highlight the most important characteristics of the phase transition relevant for producing gravitational-wave (GW) signal and discuss the observability prospects of the resulting GW spectra. I will also focus on the sources of theoretical uncert
... More
Presented by Dr. Bogumila SWIEZEWSKA
on
15 Sep 2023
at
13:45
Session:
Parallel Session 9
The symmetry breaking of grand unified gauge groups in the early Universe often leaves behind relic topological defects such as cosmic strings, domain walls, or monopoles. For some symmetry breaking chains, hybrid defects can form where cosmic strings attach to domain walls or monopoles attach to strings. In general, such hybrid defects are unstable, with one defect "eating" the other via the conv
... More
Presented by Dr. Anish GHOSHAL
on
16 Sep 2023
at
09:00
Session:
Parallel Session 3
In composite Higgs models the Higgs boson is not an elementary particle, but of composite nature, emerging as a pseudo Nambu-Goldstone boson of a strongly interacting sector. In a composite 2-Higgs-Doublet Model (2HDM) a 2HDM-like structure is generated but with couplings already predetermined by the composite nature of the model. In this talk, we present Higgs pair production through gluon fusion
... More
Presented by Mr. Felix EGLE
on
15 Sep 2023
at
14:15
Session:
Plenary Session 1
This talk provides an updated review of the progress made at the ATLAS experiment at the LHC, concentrating particularly on the scalar sector and searches for new particles.
Presented by Dr. Trevor VICKEY
on
13 Sep 2023
at
09:30
Session:
Parallel Session 2
In this presentation, we propose a novel possibility for Higgs inflation where the conformal gravity coupling for the Higgs field leads to the proximity of the effective Planck mass to zero in the Jordan frame during inflation, corresponding to a pole in the Higgs kinetic term in the Einstein frame.
The perturbative unitarity below the Planck scale is ensured by construction and the successful
... More
Presented by Mr. Simon CLERY
on
15 Sep 2023
at
14:00
Session:
Plenary Session 12
Higgs-R2 inflation is a well-motivated model of inflation as it solves the unitarity issue of Higgs inflation, is consistent with the current CMB observation, and is within the scope of the near future B-mode observation. In this talk, I will first review these basic properties of Higgs-R2 inflation. I then show that the isocurvature mode, which is a mixture of the Higgs boson and the scalaron, ca
... More
Presented by Yohei EMA
on
16 Sep 2023
at
15:00
Session:
Parallel Session 2
A Hubble-Induced Phase Transition is a natural and powerful spontaneous-symmetry-breaking mechanism that leads to an explosive production of particles in non-oscillatory models of inflation. The starring role is played by a non-minimally-coupled spectator scalar field that undergoes a phase transition as the Ricci scalar flips sign at the beginning of a kination phase after inflation. By performin
... More
Presented by Mr. Giorgio LAVERDA
on
15 Sep 2023
at
14:15
Session:
Plenary Session 12
Dynamical chiral symmetry breaking in a QCD-like hidden sector is used to generate the Planck mass and the electroweak scale including the heavy right-handed neutrino mass. A real scalar field transmits the energy scale of the hidden sector to the visible sectors, playing a role of inflaton in the early Universe. We discuss the inflationary dynamics and predictions for non-Gaussianity in our mode
... More
Presented by Dr. Mayumi AOKI
on
16 Sep 2023
at
14:30
Session:
Plenary Session 11
The nature of dark matter is still one of the fundamental questions of modern physics, due to its apparent absence of non-gravitational couplings with visible matter and with itself. In this talk I will discuss how the primordial dark matter abundance could have been originated through its (minimal and non-minimal) gravitational and non-gravitational interaction with the inflaton field, during inf
... More
Presented by Prof. Marcos Alejandro GARCIA GARCIA
on
16 Sep 2023
at
11:00
Session:
Parallel Session 8
The evolution of the early Universe around the electroweak epoch is an ideal testbed for physics beyond the Standard Model and in particular extended scalar sectors. The Universe may have experienced a sequence of phases of exotic nature, one of these being an intermediate phase where the electromagnetic charge is not conserved.
In my talk, intermediate $U(1)_\mathrm{em}$ charge-breaking (CB) p
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Presented by Dr. Christoph BORSCHENSKY
on
16 Sep 2023
at
09:30
Session:
Plenary Session 13
When the Higgs potential or the vacuum energy are derived in the framework of higher dimensional theories with compact extra dimensions and non-trivial boundaries (as in the case of the Scherk-Schwarz SUSY breaking), the usual calculations lead to the conclusion that these quantities are UV-insensitive (finite). With the help of a thorough analysis of the assumptions on which these calculations ar
... More
Presented by Prof. Vincenzo BRANCHINA
on
16 Sep 2023
at
17:00
Session:
Parallel Session 1
In extended Higgs models, a discrete symmetry is needed in the quark sector to avoid tree-level flavor-changing neutral currents. However, this is not necessarily the case in the lepton sector. We consider a model in which one Higgs couples to quarks and three others couple to the electron, muon, and tau, respectively. This four-doublet model is presented with the full scalar potential and the gau
... More
Presented by Mr. Bernardo GONçALVES
on
15 Sep 2023
at
14:45
Session:
Plenary Session 3
Already in the early days of multi-Higgs models exploration, it was appreciated that global symmetries and their breaking play a key role in shaping the scalar sector and achieving desired phenomenological signatures. Many questions have been brought up and answered since then, but new and sometimes surprising symmetry-based results in multi-Higgs-doublet models keep appearing. In this talk, I wil
... More
Presented by Prof. Igor IVANOV
on
13 Sep 2023
at
14:00
Session:
Parallel Session 1
CP4 3HDM is a three-Higgs-doublet model based on the CP symmetry of order 4 (CP4). In Yukawa sector, there are eight possible scenarios satisfying CP4 symmetry. Similar to other multi-Higgs models, Yukawa sectors unavoidably induce tree-level flavor-changing neutral couplings (FCNC), meson oscillation parameters strongly constraint FCNC. In this work, we explore whether FCNC can be sufficiently su
... More
Presented by Mr. Duanyang ZHAO
on
15 Sep 2023
at
14:30
Session:
Plenary Session 11
Unstable particles decay sooner or later, so they do not form asymptotic one-particle states and need not be included as independent states in unitarity relations. The same applies to any countable collection of particles. I will show that the behaviour of unparticle stuff, that is, a continuous collection of particles with different masses, is pretty different. I will also discuss compressed spec
... More
Presented by Manuel PEREZ-VICTORIA
on
16 Sep 2023
at
10:30
Session:
Plenary Session 4
Abstract: In this talk, I will make the case for non-minimal Higgs frameworks and extended dark sectors, where the phenomenon of dark CP-violation was first introduced. I will briefly outline the exotic dark matter phenomenology realisable in such models and focus on multi-component dark matter scenarios. I will then discuss complementary astrophysical and collider tools which can independently pr
... More
Presented by Dr. Venus KEUS
on
13 Sep 2023
at
17:00
Session:
Plenary Session 12
U(1)Lμ−Lτ≡U(1)X model is anomaly free within the Standard Model (SM) fermion content, and can accommodate the muon (g−2) data for MZ′∼O(10−100) MeV and gX∼(4−8)×10−4. WIMP type thermal dark matter (DM) can be also introduced for MZ′∼2MDM, if DM pair annihilations into the SM particles occur only through the s-channel Z′ exchange. In this work, we show that this tight cor
... More
Presented by Prof. Pyungwon KO
on
16 Sep 2023
at
14:00
Session:
Parallel Session 1
Conditions for soft breaking of the six symmetries (CP1, CP2, CP3, Z_2, U(1) and SO(3)) of the 2HDM potential were formulated in terms of 11 physical parameters consisting of masses and couplings. This led to the discovery of hitherto unknown symmetries of the 2HDM potential. A transformation into imgaginary space-time leaves the potential as well as the kinetic terms of the Lagrangian invariant.
Presented by Mr. Odd Magne OGREID
on
15 Sep 2023
at
14:00
Session:
Parallel Session 4
Multi-Higgs-doublet models equipped with global symmetry groups, either exact or softly bro- ken, offer a rich framework for constructions beyond the Standard Model and lead to remarkable phenomenological consequences. Knowing all the symmetry options within each class of models can guide its phenomenological exploration, as confirmed by the vast literature on the two- and three-Higgs-doublet mode
... More
Presented by Mr. Jiazhen SHAO
on
15 Sep 2023
at
16:15
Session:
Parallel Session 2
Higgs inflation stands out among many possible inflationary models for its minimal character, not requiring any extra degrees of freedom beyond the Standard Model. Nonetheless, the inflationary predictions, as well as the post-inflationary dynamics, are sensitive to the formulation of gravity one uses.
In this work, we study the preheating phase of Higgs Inflation in Einstein-Cartan gravity.
... More
Presented by Mr. Matteo PIANI
on
15 Sep 2023
at
14:45
Session:
Parallel Session 5
Several mechanisms generating relic abundance of ALP dark matter involve processes which take place before, during or after cosmic inflation. In such cases fundamental role is played by PQ field potential. We investigate radiative, thermal and geometric corrections to PQ field dynamics in scenarios in which the potential has very small self-coupling. We will focus on models with quasi-supersymmeri
... More
Presented by Mr. Paweł KOZóW
on
15 Sep 2023
at
16:15
Session:
Plenary Session 3
New 2HDM symmetries were recently discovered, by proving that certain relations among the parameters of the scalar potential are preserved to all orders under renormalization for scalar and gauge interactions, and at least up to two-loops when considering Yukawa interactions. Models where such symmetries are imposed have interesting phenomenological aspects, which will be presented in this talk. I
... More
Presented by Dr. Pedro FERREIRA
on
13 Sep 2023
at
14:30
Session:
Parallel Session 3
The investigation of the trilinear self-coupling of the discovered Higgs boson is one of the main goals of particle physics in the near future.
We provide predictions for this coupling, expressed in terms of the coupling modifier $\kappa_{\lambda}$, incorporating one-loop corrections within arbitrary renormalizable QFTs.
The presented framework allows to apply a wide class of pre- and user-defin
... More
Presented by Martin GABELMANN
on
15 Sep 2023
at
14:00
Session:
Parallel Session 4
Machine learning techniques are used to predict unitarity and bounded from below (BFB) constraints in multi-scalar models. This approach has been shown to be effective when applied to two and three Higgs doublet models and the left-right model. By using appropriate neural network architectures, learning algorithms, and well-prepared training datasets, a high level of predictivity is achieved. Mach
... More
Presented by Dr. Darius JURCIUKONIS
on
15 Sep 2023
at
16:30
Session:
Plenary Session 9
We discuss production of primordial black holes from first-order electroweak phase transition in the framework of the nearly aligned Higgs effective field theory, in which non-decoupling quantum effects are properly described. Since the mass of such primordial black holes is evaluated to be about 10^-5 of the solar mass, current and future microlensing observations such as Subaru HSC, OGLE, PRIME
... More
Presented by Prof. Shinya KANEMURA
on
15 Sep 2023
at
10:00
Session:
Parallel Session 3
Existing studies of Higgs-tau Yukawa coupling allows for the presence of a non-zero CP-odd contribution. This is usually probed and constrained at the LHC by studying the distribution of events with respect to the angle between the two tau decay planes in H -> tau+ tau- decay. We study another interesting signature of CP violation, namely forward-backward asymmetry in the decay H -> tau+ tau- gamm
... More
Presented by Dr. Dibyakrupa SAHOO
on
15 Sep 2023
at
15:15
Session:
Parallel Session 3
We study the anomalous ZZγ and Zγγ couplings that can be probed via
Zγ production at the e^+ e^− colliders. We take Standard Model Effective Field Theory (SMEFT) approach to examine these anomalous neutral triple gauge couplings in a model-independent way. There are four independent dimension-8 operators that generate these gauge interactions, one of them is CP-conserving and rest three are
... More
Presented by Mr. Sahabub JAHEDI
on
15 Sep 2023
at
14:45
Session:
Parallel Session 4
The Weinberg 3HDM potential may lead to spontaneous CP violation. The terms thus inducing CP violation are constrained by the measured properties of the discovered scalar at 125 GeV. In a wide range of parameter space, the potential leads to one or two light neutral states (below 125 GeV) that have a considerable admixture of CP-odd fields. The potential can accommodate a light state at 95 GeV, as
... More
Presented by Prof. Per OSLAND
on
15 Sep 2023
at
16:00
Session:
Plenary Session 8
Pulsar Timing Array data can be effectively accommodated by a first-order phase transition triggered by a radion at the MeV-GeV scale feebly coupled to the Standard Model.
Presented by Prof. Mariano QUIROS
on
14 Sep 2023
at
16:00
Session:
Plenary Session 11
In this talk I will present several scenarios that scape current direct detections bounds for WIMP.
Presented by Prof. Antonio DELGADO
on
16 Sep 2023
at
12:00
Session:
Plenary Session 13
I will talk about the status of the Standard Model Higgs picture, as well as the future tests of this theoretical framework. I will also talk about the motivation and realization of possible extensions of this
idea, to include new scalars at the weak scale and beyond, and discuss the theoretical and experimental constraints on the existence of these new states.
Presented by Prof. Carlos WAGNER
on
16 Sep 2023
at
17:30
Session:
Parallel Session 8
The existence of dark matter (DM) has been well established by overwhelming indirect evidence indicating the presence of a dark Universe. However, very little is known about its origin and nature. Despite our general lack of knowledge, it is indisputable that dark matter interacts gravitationally with visible matter. Although in a plethora of DM models, it is commonly assumed that DM couples to th
... More
Presented by Ms. Anna SOCHA
on
16 Sep 2023
at
09:15
Session:
Parallel Session 1
I discuss the SU(2) triplet extension of the Standard Model as the origin of the 95 GeV di-photon excess. We show that for a small mixing angle with the Standard Model Higgs, the neutral component of the triplet has a sizable branching ratio to γγ. Consequently, we make several precise predictions: 1) a positive shift in the mass of the W-boson, 2) associated production of photons alongside tau
... More
Presented by Sumit BANIK
on
15 Sep 2023
at
15:15
Session:
Plenary Session 6
We present the simplest scalar model of dynamical symmetry breaking which induces only one scale from scalar dark mater couplings. While the generated scale may vary, $10^{11-16}$~GeV, the dark matter mass is fixed to $5.6 \times 10^8$~GeV due to freeze-in dynamics. Right-handed neutrino Majorana masses are generated by $w$ via Yukawa couplings, and the seesaw mechanism of type-I and leptogenesis
... More
Presented by Prof. Martti RAIDAL
on
14 Sep 2023
at
11:00
Session:
Plenary Session 2
Precision Higgs studies at future e+e- colliders have the potential for addressing some of the long-standing mysteries of the Standard Model associated with electroweak symmetry breaking. Precise measures of Higgs couplings to gauge bosons and fermions as well as evidence for Higgs self-couplings can reveal the existence of new fundamental mass scales and signal the presence of new fundamental phy
... More
Presented by Howard HABER
on
13 Sep 2023
at
11:30
Session:
Plenary Session 7
A novel mechanism of interconversion between matter and graviton via parametric resonance will be reported.
Presented by Chunshan LIN
on
14 Sep 2023
at
14:00
Session:
Parallel Session 9
We construct and explore the physical properties of \textit{scalaroca stars}: spherically symmetric solitonic solutions made of a complex scalar field $\Phi$ and a complex Proca field $A^\mu$. We restrict our attention to configurations in which both fields are in the fundamental state and possess an equal mass, focusing on the cases when (\textit{i}) the scalar and Proca fields are (non--linearly
... More
Presented by Dr. Alexandre POMBO
on
16 Sep 2023
at
09:30
Session:
Plenary Session 2
Due to the recent technological breakthroughs for muon cooling, the muon collider program has regained its momentum, aiming at the future energy frontier. We present the physics potential for two case studies: precision physics of scalars, and thermal WIMP dark matter coverage at a multi-TeV muon collider.
Presented by Prof. Tao Han HAN
on
13 Sep 2023
at
11:00
Session:
Plenary Session 4
Scalars can play an important role in the low-energy physics of leptons. They can lead to new chirality-flipping contributions to the muon mass and strong contributions to muon g-2. Via the seesaw mechanism they can explain neutrino masses. Scalars with such properties can typically induce significant lepton-flavour violating effects, implying strong constraints on the parameter space of models. T
... More
Presented by Prof. Dominik STOECKINGER
on
13 Sep 2023
at
16:00
Session:
Plenary Session 8
We are currently witnessing the dawn of a new era in astrophysics and cosmology, started by the LIGO/Virgo observations of gravitational waves. In this talk, I will discuss prospects for detection of signals from cosmological phase transitions with the currently running experiments and the upcoming next generation. Including the problems associated with observation of a primordial signal in the pr
... More
Presented by Dr. Marek LEWICKI
on
14 Sep 2023
at
17:30
Session:
Plenary Session 9
I consider the general class of theories in which there is a new ultralight scalar field that mediates an equivalence principle violating, long-range force. In such a framework, the Sun and Earth act as sources of the scalar field, leading to potentially observable location-dependent effects on atomic and nuclear spectra. The sensitivity of current and next-generation atomic and nuclear clocks to
... More
Presented by Prof. Zackaria CHACKO
on
15 Sep 2023
at
09:00
Session:
Plenary Session 8
The observed matter-antimatter asymmetry of the Universe can be generated dynamically through the mechanism of electroweak baryogenesis (EWBG). This requires a strong first order electroweak phase transition (SFOEWPT). While in the Standard Model with a 125 GeV Higgs boson this cannot be realized it is possible in extended Higgs sectors like e.g. the 2-Higgs-Doublet Model. The SFOEWPT leads to pri
... More
Presented by Prof. Milada Margarete MüHLLEITNER
on
14 Sep 2023
at
17:00
Session:
Plenary Session 9
We study the novel possibility that a long range scalar force may lead to violation of baryon number. We illustrate that this scenario can lead to vastly disparate nucleon lifetimes in different astronomical environments, and yield a number of potentially observable effects, such as a flux of neutrinos above 10 MeV from the Sun and heating of old neutron stars. We find that neutron star heating pr
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Presented by Dr. Hooman DAVOUDIASL
on
15 Sep 2023
at
09:30
Session:
Parallel Session 2
Long-lived sterile neutrinos can play the role of dark matter. We consider the possibility that such neutrinos form a thermal bath with a singlet scalar, while not being in thermal equilibrium with the Standard Model fields. Eventually, the neutrino dark matter undergoes freeze-out in the dark sector, which can occur in both non-relativistic and relativistic regimes. To account for the latter poss
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Presented by Dr. Takashi TOMA
on
15 Sep 2023
at
13:30
Session:
Plenary Session 1
The discovery of the Higgs boson over ten years ago at the LHC at CERN started a rich physics program of studies of properties of the first scalar particle. Since then Atlas and CMS accumulated over 140fb-1 each of pp collision data collected during LHC runs between 2015 and 2018. These data are being extensively analyzed and provided a broad plethora of results with increasing precision and reac
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Presented by Prof. Slawomir TKACZYK
on
13 Sep 2023
at
09:00
Session:
Parallel Session 8
We investigate the dark axion portal, a connection between an axion-like particle (ALP), a photon, and a dark photon, in past and future intensity frontier detectors, such as FASER2, MATHUSLA, and SHiP. We expand on previous works by considering several mass regimes for the Dark Sector (DS) particles, resulting in an extended lifetime range for the unstable species. We also account for LLP product
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Presented by Dr. Krzysztof JODłOWSKI
on
16 Sep 2023
at
09:00
Session:
Plenary Session 10
I will first review the covariant and differential geometric methods in the construction of Quantum Field Theories, where the fields are treated as coordinates of a field-space manifold. Although the geometry of bosons on such manifolds was well understood, I will then explain how the inclusion of fermions was obstructed by a number of theoretical difficulties and limitations. I will show how in a
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Presented by Prof. Apostolos PILAFTSIS
on
15 Sep 2023
at
11:30
Session:
Parallel Session 9
After a short review of the field-space formalism on a supermanifold, I will present a natural approach to deriving the supermetric from the classical action of an effective Supergeometric Quantum Field Theory (SG-QFT). I will give the proof of a no-go theorem for the generation of a non-zero super-Riemannian curvature in a bilinear kinetic fermionic sector from the existence of scalar fields only
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Presented by Viola GATTUS
on
16 Sep 2023
at
09:15
Session:
Plenary Session 10
I will discuss a generic and model-independent search strategy for probing tree-level CP- violation in inclusive multi-lepton signals at the LHC. The method is illustrated by deriving the sensitivity to flavor-changing new physics effects parameterized in terms of 4-fermi effective operators.
Presented by Jose WUDKA
on
15 Sep 2023
at
12:00
Session:
Plenary Session 3
The Standard Model (SM) flavor puzzle is obscured by the possibility of different choices of basis and parametrization. However, it is clear that physical observables cannot depend on such arbitrary and unphysical choices. Hence, a new and un-obscured vision on the flavor puzzle is offered by formulating it in a basis invariant language. In order to achieve this for the SM quark sector, we use the
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Presented by Dr. Andreas TRAUTNER
on
13 Sep 2023
at
15:00
Session:
Parallel Session 5
In this talk, I will discuss the so-called t-channel singularities that may occur when a given t-channel scattering process is mediated by a massive, stable particle on its mass shell.
After providing conditions for the singularity to occur and presenting several examples of SM and BSM processes afflicted by the issue, I will describe a regularization method based on thermal field theory.
Ta
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Presented by Mr. Michał IGLICKI
on
15 Sep 2023
at
16:30
Session:
Parallel Session 5
Recent studies have provided evidence for the existence of new totally asymptotically free trajectories in non-Abelian particle models without asymptotic symmetry in the high-energy limit. These results have been obtained in a general SU(NL)×SU(Nc) Higgs-Yukawa model that includes the non-Abelian sector of the standard model, by means of the standard one-loop study of a generic Higgs potential (f
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Presented by Luca ZAMBELLI
on
15 Sep 2023
at
16:45
Session:
Parallel Session 8
I present a class of leptogenesis models with a symmetry-motivated construction. These models offer both a vanishing light neutrino mass spectrum and large CP phases necessary for the generation of significant lepton asymmetry. I consider an extension of the Standard Model, which includes three singlet neutrinos which have mass splittings comparable to their decay widths. I show that this tri-reso
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Presented by Mr. Thomas MCKELVEY
on
16 Sep 2023
at
09:45
Session:
Parallel Session 2
The true nature of the Higgs particle (is it fundamental or composite?) is still under investigation.
One plausible realization, which provides also a solution to the ElectroWeak hierarchy problem, is to identify the Higgs field with one of the pseudo-Nambu-Goldstone bosons (pNGBs) arising from the spontaneous and explicit breaking of a global symmetry at some UV scale. However, for the physicall
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Presented by Dr. Fotis KOUTROULIS
on
15 Sep 2023
at
15:15
