11-14 September 2019
University of Warsaw
Europe/Warsaw timezone
Home > Contribution List
Displaying 88 contributions out of 88
Session: Plenary 1
Presented by Prof. Greg LANDSBERG on 11 Sep 2019 at 09:30
Session: Parallel 2
We introduce a 3-Higgs Doublet Model (3HDM) with two Inert (or dark) (pseudo)scalar doublets and an active Higgs one, hence termed I(2+1)HDM, in the presence of a discrete $Z_3$ acting upon the three doublet fields. Assuming a maximally symmetric configuration of the parameters related to the two dark doublets, we show that such a construct yields a two-component Dark Matter (DM) model and the two ... More
Presented by Dr. Diana ROJAS-CIOFALO on 13 Sep 2019 at 14:00
Session: Plenary 12
The calculation of tunneling actions, that control the exponential suppression of the decay of metastable phases (like the unstable electroweak vacuum), can be reformulated as an elementary variational problem in field space. This alternative approach circumvents the use of bounces in Euclidean space by introducing an auxiliary function, a tunneling potential Vt that connects smoothly the metastab ... More
Presented by Prof. Jose Ramon ESPINOSA on 14 Sep 2019 at 14:30
Session: Parallel 5
We propose a multi-messenger probe of the natural parameter space of QCD axion dark matter based on observations of black hole-neutron star binary inspirals. It is suggested that a dense dark matter spike may grow around intermediate mass black holes. The presence of such a spike produces two unique effects: a distinct phase shift in the gravitational wave strain during the inspiraling period and ... More
Presented by Dr. Marco CHIANESE on 13 Sep 2019 at 16:45
Session: Plenary 9
Presented by Prof. Alex POMAROL on 13 Sep 2019 at 09:00
Session: Plenary 13
Presented by Howard HABER on 14 Sep 2019 at 16:30
Session: Plenary 9
Presented by Dr. Manuel PEREZ-VICTORIA on 13 Sep 2019 at 10:00
Session: Parallel 8
We consider the possibility of an oscillating scalar field accounting for dark matter and dynamically controlling the spontaneous breaking of the electroweak symmetry through a Higgs-portal coupling. This requires a late decay of the inflaton field, such that thermal effects do not restore the electroweak symmetry after reheating, and so inflation is followed by an inflaton matter-dominated epoch. ... More
Presented by Dr. Catarina COSME on 14 Sep 2019 at 09:30
Session: Parallel 9
We present a complete classification of anomaly free 2HDMs with a flavoured U(1) gauge symmetry, resulting in a total of eleven distinct textures. Five of these are relatively well-studied, while the rest either partially, or completely, lack previous treatment. We study these textures under a variety of experimental bounds, comparing our results with previous studies whenever these exist.
Presented by Astrid ORDELL
Session: Parallel 6
In this talk, I will discuss the construction of the multi-Higgs Doublet Model (n-HDM) based on the Maximal symmetry Sp(2n$)/Z_2$. The maximal symmetry n-HDM provides the natural SM alignment limit which is a phenomenologically rich framework with a special feature of unification of all quartic couplings. The list of most possible accidental symmetries as subgroups of symplectic group Sp(2n$)/Z_2$ ... More
Presented by Dr. Neda DAVISHI on 13 Sep 2019 at 16:15
Session: Parallel 4
We consider Twin Higgs models and explore the observability of the scalar and neutral gauge sectors at the colliders via Higgs and Hypercharge portals.
Presented by Dr. Saereh NAJJARI on 13 Sep 2019 at 16:45
Session: Plenary 11
Presented by Prof. Manfred LINDNER on 14 Sep 2019 at 12:00
Session: Plenary 2
We demonstrate how residual flavour symmetries can naturally forbid or control flavour-changing neutral currents (FCNC) in multi-Higgs-doublet models (MHDM).
Presented by Dr. Ivo DE MEDEIROS VARZIELAS on 11 Sep 2019 at 12:00
Session: Plenary 5
I discuss the cosmological signals associated with Goldstone bosons that arise from the breaking of global symmetries in the neutrino sector. The primary focus will be on the effects of neutrino decay into a lighter neutrino and a Goldstone boson on cosmic microwave background and large scale structure observables.
Presented by Prof. Zackaria CHACKO on 12 Sep 2019 at 09:30
Session: Plenary 7
Presented by Dr. Felix KAHLHOEFER on 12 Sep 2019 at 14:30
Session: Parallel 3
The effective field theory (EFT) turns out to be an instrument of an immense value in all aspects of modern particle physics being theory, phenomenology or experiment. In this talk I will show how to extend the systematic top down approach to construction of the EFT proposed by Hitoshi Murayama (LBL, Berkeley) and separately by John Ellis (King’s Coll. London) groups to the curved spacetime. To ... More
Presented by Dr. Lukasz NAKONIECZNY on 13 Sep 2019 at 15:15
Session: Parallel 5
Presented by Dr. Venus KEUS on 13 Sep 2019 at 17:00
Session: Plenary 5
Presented by Prof. Keith DIENES on 12 Sep 2019 at 10:00
Session: Plenary 4
Higgs doublets may come in three generations. The scalar sector of the 3HDM can be constrained by global symmetry groups leading to characteristic phenomenology. All symmetry groups G realizable in the 3HDM scalar sector are known, and for each G, a generic G-symmetric potential can be written in a special basis. However recognizing the presence of a symmetry in a general basis remains a major tec ... More
Presented by Dr. Igor IVANOV on 11 Sep 2019 at 16:30
Session: Parallel 1
A search for di-jet plus missing energy is discussed in the framework of an extended dark matter EFT. This signature offers a unique opportunity to probe the peculiar SSXX operator, present in the setup. Prospects to extract its coefficient will be presented both for the High-Luminosity LHC and a future electron-positron collider, such as CLIC, taking into account the major backgrounds.
Presented by Karla TAME-NARVAEZ on 13 Sep 2019 at 14:30
Session: Parallel 1
In this talk, we discuss BSM scenarios which involve strongly coupled field theories and as a result, they all predict relatively light scalar, the dilaton -- a (pseudo) Goldstone boson corresponding to the spontaneous breaking of scale invariance. In particular, the aim is to study the signatures of a light dilaton at the LHC. Furthermore, we employ the dilaton portal to explore (composite/hologr ... More
Presented by Aqeel AHMED on 13 Sep 2019 at 15:15
Session: Plenary 7
Once early Universe cosmology and the process of reheating is studied in detail, we show that EeV dark matter is quite natural in several BSM scenario, from High-scale SUSY to massive spin-2 mediators passing through moduli sector. EeV neutrino can be one of the possible signatures.
Presented by Prof. Yann MAMBRINI on 12 Sep 2019 at 14:00
Session: Parallel 7
We disscuss a new process where singly charged Higgs bosons are produced in a same-sign pair via vector boson fusion at hadron colliders in two Higgs doublet models. This process directly relates to the global symmetry structure of the Higgs potential. We evaluate the signal and the background for the both cases at the LHC and future higher-energy hadron colliders and show that the process can be ... More
Presented by Mr. Masashi AIKO on 14 Sep 2019 at 09:45
Session: Parallel 4
The phenomenology of several Beyond the Standard Model (SM) extensions that include extended Higgs sectors will be presented. The models discussed are: the SM extended by a complex singlet field (CxSM), the 2-Higgs-Doublet Model with a CP-conserving (2HDM) and a CP-violating (C2HDM) scalar sector, the singlet extension of the 2-Higgs-Doublet Model (N2HDM), and the Next-to-Minimal Supersymmetric SM ... More
Presented by Mr. Duarte AZEVEDO on 13 Sep 2019 at 16:15
Session: Plenary 6
In my talk I will discuss the dependence of the dark matter production mechanism in the early universe on its coupling to the Standard Model and mediator. For illustration, I will focus on the case of compressed mass spectrum dark matter scenario and show that we can continuously go from freeze-in to freeze-out with an intermediate stage of conversion driven freeze-out. In the latter case, the f ... More
Presented by Laura LOPEZ HONOREZ on 12 Sep 2019 at 11:00
Session: Parallel 4
The signals of the SO(5) × U(1) gauge-Higgs unification model at the International Linear Collider are studied. In this model, Kaluza-Klein modes of the neutral gauge bosons affect fermion pair productions. The deviations of the forward-backward asymmetries of the $e^+ e^- to \bar{b}b, \bar{t}t$ processes from the standard model predictions are clearly seen by using polarised beams. The dev ... More
Presented by Dr. Shuichiro FUNATSU on 13 Sep 2019 at 16:30
Session: Parallel 7
Precision measurement of the discovered Higgs boson is one of essential ways to explore the shape of the Higgs sector. We calculated Higgs boson decay branching ratios with full next-to-leading-order (NLO) electroweak and QCD corrections in various extended Higgs models; i.e., the singlet extension of the standard model, 4 types of two Higgs doublet models and the inert doublet model. In the calcu ... More
Presented by Dr. Kodai SAKURAI on 14 Sep 2019 at 09:15
Session: Plenary 10
SO(5)xU(1) gauge-Higgs unification yields nearly the same phenomenology at low energies. It predicts new particles (KK excited states) around 7 - 8 TeV. In particular, the effect of Z' particles can be clearly seen in the early stage of 250 - 500 GeV ILC in the fermion pair production processes as interference effects. Recently a new gauge-Higgs unification scheme has been proposed which can b ... More
Presented by Prof. Yutaka HOSOTANI on 13 Sep 2019 at 12:00
Session: Parallel 6
We show that biquadratic potentials admit nontrivial flat directions when the determinant of the quartic coupling matrix of the scalar fields vanishes. This consideration suggests a new approach to the problem of finding flat directions in scale-invariant theories, noticeably simplifying the study of scalar potentials involving many fields. The method generalizes to arbitrary quartic potentials by ... More
Presented by Dr. Kristjan KANNIKE on 13 Sep 2019 at 17:00
Session: Parallel 3
In this work we study the phenomenological constraints to the parameter space of scalars carring color quantum numbers. Specifically we constrain the Manohar-Wise model based on the addition of a SU(2) double and SU(3) octet to the minimal Higgs model. The fits are performed using the open source HEPfit package. We include both theoretical constraints, such as unitarity and pertubativity, and expe ... More
Presented by Victor MIRALLES on 13 Sep 2019 at 14:00
Session: Plenary 13
We derive efficiency factors for the production of gravitational waves through bubble collisions and plasma-related sources in strong phase transitions, and find the conditions under which the bubble collisions can contribute significantly to the signal. We illustrate our findings in two examples, the Standard Model with an extra $|H|^6$ interaction and a classically scale-invariant $U(1)_{\rm B-L ... More
Presented by Dr. Marek LEWICKI on 14 Sep 2019 at 16:00
Session: Parallel 1
Many BSM models are characterized by a new low energy confining sector that communicates with the Standard Model via heavy mediators. The production of these mediators at colliders would lead to an hadronization process similar to QCD and produce a jet of dark hadrons. Depending on the properties of the dark sector, dark jets can lead to many exotic collider signatures, that may go undetected if n ... More
Presented by Giovanni GRILLI DI CORTONA on 13 Sep 2019 at 14:15
Session: Parallel 2
Observed tiny masses of neutrinos suggest the existence of physics beyond the standard model. Many models and mechanisms are proposed to explain their smallness naturally. Some of them generate tiny neutrino masses by the effect of very heavy particles (seesaw mechanism), and others generate them by quantum effect of new particles whose masses are near EW scale. However, it was shown that most of ... More
Presented by Kazuki ENOMOTO on 13 Sep 2019 at 14:30
Session: Plenary 8
Presented by Dr. Hooman DAVOUDIASL on 12 Sep 2019 at 17:00
Session: Plenary 3
Presented by Michael SPIRA on 11 Sep 2019 at 14:00
Session: Plenary 6
Presented by Prof. Antonio DELGADO on 12 Sep 2019 at 11:30
Session: Plenary 1
Presented by Prof. Carlos WAGNER on 11 Sep 2019 at 10:00
Session: Plenary 4
Presented by Margarida (Gui) N. REBELO on 11 Sep 2019 at 16:00
Session: Parallel 5
A number of experimental anomalies involving neutrinos hint towards the existence of at least an extra (a very light) sterile neutrino. However, such a species, appreciably mixing with the active neutrinos, is disfavored by different cosmological observations like Big Bang Nucleosynthesis (BBN), Cosmic Microwave Background (CMB) and Large Scale Structure (LSS). Recently, it was shown that the pres ... More
Presented by Mr. Anish GHOSHAL
Session: Parallel 4
We explore the possibility of observing lepton number violation originating from the sneutrino sector at the LHC. In the NMSSM extended with right-handed neutrinos the right-sneutrinos can have a tiny decay width so that the lepton number violating terms can generate a sizable effect before the sneutrino decays. We explore the possibility to produce the right-sneutrinos through the heavy Higgs por ... More
Presented by Dr. Harri WALTARI on 13 Sep 2019 at 16:00
Session: Plenary 2
Instead of the well-known concept of scalar leptons from supersymmetry, a class of particles from $SO(10) \to SU(5) \times U(1)_\chi$ may be called leptonic scalars because of their interactions with the known fermionic leptons. They are also dark-matter candidates. Some simple examples are discussed.
Presented by Prof. Ernest MA on 11 Sep 2019 at 11:00
Session: Parallel 7
The possibility of light charged Higgs boson $H^\pm$ that decays predominantly to $cb$ and with a mass in the range 80 GeV $\le M_{H^\pm} \le 90$ GeV is studied in the context of a 3-Higgs Doublet Model (3HDM). Searches for this decay at the Large Hadron Collider (LHC) do not have the sensitivity to this mass region at present. It is shown that the searches for $H^\pm$ at LEP2 could be supplemente ... More
Presented by Mr. Muyuan SONG on 14 Sep 2019 at 09:30
Session: Plenary 11
The Standard Model breaks electroweak symmetry using an isospin-doublet scalar Higgs field, i.e. a field in the minimal nontrivial representation of SU(2)_L. But there could in principle be contributions to the vacuum condensate from "exotic" scalars in higher isospin representations. Such exotic models are in general strongly constrained by electroweak precision measurements, which I'll use to ... More
Presented by Heather LOGAN on 14 Sep 2019 at 11:30
Session: Parallel 9
We will talk about a novel way to avoid FCNC's at tree level in any multi-scalar extension of the Standard Model. This approach called Singular Alignment consists in taking all Yukawa matrices to be singularly aligned in flavor space. We mean by this that the Yukawa matrices are given as linear combinations of the rank 1 matrices that appear in the singular value decomposition of the mass matrix. ... More
Presented by Dr. Ulises SALDANA on 14 Sep 2019 at 09:15
Session: Plenary 10
Presented by Dr. Chunshan LIN on 13 Sep 2019 at 11:30
Session: Plenary 5
Presented by Mr. Manuel DREES on 12 Sep 2019 at 09:00
Session: Parallel 3
We investigate the production of primordial Gravitation Waves (GWs) arising from First Order Phase Transitions (FOPT) associated to neutrino mass generation in the context of type-I seesaw models. We examine both high scale and low scale variants, with either explicit or spontaneously broken lepton number symmetry. In the latter case, a pseudo-Goldstone boson, dubbed Majoron, may provide a candida ... More
Presented by Dr. Antonio MORAIS on 13 Sep 2019 at 14:45
Session: Plenary 7
I will describe a simple strongly-interacting dark matter model based on the neutrino portal paradigm. I will discuss the associated naturally issues and phenomenological constraints.
Presented by Jose WUDKA on 12 Sep 2019 at 15:00
Session: Parallel 6
In my presentation I will be considering non-standard models with additional scalar triplets: without modification of the gauge group (Higgs Triplet Model - HTM) and with extended gauge group $SU(2)_R x SU(2)_L x U(1)$ (Left Right Symmetric Model - LRSM). Those two models vary in the triplet vacuum expectation value (VEV). Within the HTM we have to keep the triplet VEV at most at the range of GeV ... More
Presented by Magdalena KORDIACZYNSKA on 13 Sep 2019 at 16:45
Session: Parallel 6
Imposing one of the symmetries (CP1, Z_2, U(1), CP2, CP3, SO(3))on the 2HDM potential implies certain constraints on the masses and couplings of the model. These constraints are expressed in terms of a minimal set, consisting of 11 masses and couplings.
Presented by Mr. Odd Magne OGREID
Session: Parallel 1
The decay K+→π+vv, with a very precisely predicted branching ratio of less than 10exp(-10), is one of the best candidates to reveal indirect effects of new physics at the highest mass scales. The NA62 experiment at the CERN SPS is designed to measure the branching ratio of K+→π+vv with a decay-in-flight technique. NA62 took data so far in 2016-2018. Statistics collected in 2016 allowed NA62 ... More
Presented by Dr. Patrizia CENCI
Session: Parallel 2
I am going to discuss possibility of discovering dark matter particles at future e+e- colliders such as CLIC, ILC or CEPC. Within several simple models, I will try to answer the following questions: (1) Where, in the parameter space, is the region allowed by current experimental constraints, that maximizes cross section for DM production at the colliders? (2) Could the signal of DM be ... More
Presented by Mr. Michał IGLICKI on 13 Sep 2019 at 14:45
Session: Parallel 8
We discuss a setup in which freeze-in scalar singlet dark matter production can be probed through dark matter decay. If dark matter consists of two or more flavors of scalar singlets, transitions between dark matter particles can serve as a probe of the coupling that sets the relic abundance and give rise to gamma-ray spectral features.
Presented by Johannes HERMS on 14 Sep 2019 at 09:00
Session: Parallel 8
We set conservative constraints on decaying dark matter particles with masses spanning a very wide range (10^4 − 10^16 GeV). For this we use multimessenger observations of cosmic-ray (CR) protons/antiprotons, electrons/positrons, neutrinos/antineutrinos and gamma rays. Focusing on decays into the b bbar channel, we simulate the spectra of dark matter yields by using the Dokshitzer-Gribov-Lipatov ... More
Presented by Koji ISHIWATA on 14 Sep 2019 at 09:15
Session: Parallel 2
One of the most rapidly developing areas of research in particle physics nowadays is to look for new, light, extremely weakly-interacting particles that could have escaped detection so far due to the lack of sufficient luminosity. A particularly promising experimental strategy in these, so-called, intensity-frontier searches is to look for highly-displaced decay signatures of light long-lived part ... More
Presented by Mr. Krzysztof JODłOWSKI on 13 Sep 2019 at 15:15
Session: Plenary 11
Presented by Prof. Rohini GODBOLE on 14 Sep 2019 at 10:30
Session: Plenary 3
Although a Higgs boson was found in 2012, structures of the Higgs sector (multiplet structure, symmetry, interaction) have not yet been known, and there are various possibilities of non-minimal Higgs sectors, which strongly connect to the scenario of new physics beyond the standard model (SM). In this talk, I would like to discuss how we can discriminate and narrow down these models of the Higgs ... More
Presented by Prof. Shinya KANEMURA on 11 Sep 2019 at 14:30
Session: Parallel 2
Motivated by the fact that so far all evidence for dark matter (DM) has gravitational origin, we explore the possibility that the dark sector is coupled to the standard model (SM) only gravitationally. We discuss two mechanisms that can contribute to the DM production - \textit{non-perturbative} and \textit{perturbative}. The first case refers to the particle production due to time evolution of th ... More
Presented by Ms. Anna SOCHA on 13 Sep 2019 at 14:15
Session: Plenary 12
Presented by Prof. Vincenzo BRANCHINA on 14 Sep 2019 at 15:00
Session: Parallel 2
We consider cases where the dark matter-nucleon interaction is naturally suppressed. We explicitly show that extending the standard model scalar sector by a number of singlets can lead to a vanishing direct detection cross section, if some softly broken symmetries are imposed in the dark sector. In particular, it is shown that if said symmetries are SU(2) [SU(N)] or U(1)×SN, then the resulting Ps ... More
Presented by Dimitrios KARAMITROS on 13 Sep 2019 at 15:00
Session: Plenary 11
Plenary presentation based on arXiv:1904.06723, with Neda Darvishi.
Presented by Prof. Apostolos PILAFTSIS on 14 Sep 2019 at 11:00
Session: Plenary 6
I will discuss recent progress in understanding scalar dark matter dynamics.
Presented by Oleg LEBEDEV on 12 Sep 2019 at 12:00
Session: Plenary 3
Presented by Prof. George Wei-Shu HOU on 11 Sep 2019 at 15:00
Session: Plenary 1
Presented by Prof. Barr ALAN on 11 Sep 2019 at 09:00
Session: Parallel 1
Studies of rare processes in the flavor domain at B-factories provide excellent opportunities to look for effects beyond the standard model that complement direct searches at the energy frontier. The talk presents recent measurements of $B$-physics observables sensitive to BSM scalars in leptonic and semileptonic $B$ decays, based on the data sample containing 772 million $B\bar{B}$ pairs collec ... More
Presented by Dr. Karol ADAMCZYK on 13 Sep 2019 at 14:00
Session: Plenary 10
Presented by Geraldine SERVANT on 13 Sep 2019 at 11:00
Session: Parallel 1
The Compact Linear Collider (CLIC) is a proposed TeV-scale high-luminosity electron-positron collider, an attractive option for the next large facility at CERN. Already the first CLIC stage, with energy of 380 GeV, will allow us to study the Higgs boson properties with very high precision. These measurements can also result in direct or indirect discovery of "new physics", Beyond the Standard Mod ... More
Presented by Mr. Krzysztof MęKAłA on 13 Sep 2019 at 15:00
Session: Parallel 7
In this talk I will present an investigation into the sizeable interference effects between a heavy charged Higgs boson signal produced via $pp \to t\bar{b}H^−$ (+ c.c.) followed by the decay $H^- \to b\bar{t}$ (+ c.c.) and the irreducible background given by $pp\to t\bar{t}b\bar{b}$ topologies at the Large Hadron Collider (LHC). It is shown how such effects could spoil current $H^\pm$ searches ... More
Presented by Mr. Riley PATRICK on 14 Sep 2019 at 09:00
Session: Plenary 8
Presented by Thomas KONSTANDIN on 12 Sep 2019 at 16:30
Session: Parallel 3
Dynamic relaxation provides an interesting framework which intends to solve the hierarchy problem by postulating, that the observed value of the electroweak scale was determined dynamically in the early Universe. Values of the electroweak scale were scanned during an evolution of axion-like field (a relaxion), with a stopping mechanism responsible for fixing the scale at a small value. The ori ... More
Presented by Mr. Adam MARKIEWICZ on 13 Sep 2019 at 15:00
Session: Parallel 5
In face of the small-scale structure problems in the collisionless cold dark matter (DM) paradigm, a popular solution is to introduce strong DM self-interactions which is usually obtained by the nonperturbative enhancement with the light mediator. However, if such a light mediator is unstable and decays into SM particles, the model is well constrained by the DM indirect detection experiments. In t ... More
Presented by Dr. Da HUANG on 13 Sep 2019 at 16:15
Session: Parallel 1
We study a scale-invariant minimal supersymmetric Standard Model which allows for an implementation of inflation in the early universe. This model has the same field content as the Next-to-Minimal Supersymmetric Standard Model (NMSSM) thus can be distinguished by observations in the scalar sectors. A crucial role play the singlet components. We point out that there might exist light singlet-like s ... More
Presented by Dr. Wolfgang Gregor HOLLIK on 13 Sep 2019 at 14:45
Session: Parallel 6
I introduce generally applicable strategies for the construction of basis invariants in multi-Higgs models. Applied to the two Higgs doublet model (2HDM), this allows us to find the full set of generating (CP-even and CP-odd) basis invariants. The complete ring of basis invariants is constructed, and novel relations between the CP-odd basis invariants emerge. This allows to derive the basis invari ... More
Presented by Dr. Andreas TRAUTNER on 13 Sep 2019 at 16:00
TBA
Session: Plenary 13
Presented by Marcela CARENA
Session: Plenary 12
The SM-like Higgs boson mass can be predicted in the MSSM. Loop corrections are very important in this prediction. Leading 2-loop and even 3-loop corrections can be significantly larger than the experimental uncertainty reached at the LHC. After giving a review of different possible methods we focus on a recent calculation done in the context of FlexibleSUSY: FlexibleEFTHiggs. This calculation is ... More
Presented by Prof. Dominik STOECKINGER on 14 Sep 2019 at 14:00
Session: Parallel 9
Presented by Marc SHER on 14 Sep 2019 at 09:00
Session: Parallel 3
Warped extra dimensions have been widely used in the last twenty years to address the hierarchy problem and construct phenomenologically viable BSM models. These models require some mechanism to stabilize the size of the extra dimension, which usually produces a light radion. A common tool used to study the stabilization mechanism is the effective potential of the radion and several approximatio ... More
Presented by Dr. Javier MARTINEZ LIZANA on 13 Sep 2019 at 14:30
Session: Parallel 3
We consider a scalar field with a bottom-less linear potential, finding that cosmologies unavoidably end up with a crunch, even in scenarios compatible with the observed positive cosmological constant. Assuming that rebounces avoid singularities, this generates a new kind of multiverse: the universe undergoes cycles with different cosmological constants, all with finite lifetime regardless of the ... More
Presented by Dr. Daniele TERESI on 13 Sep 2019 at 14:15
Session: Plenary 9
Presented by Dr. Rick S GUPTA on 13 Sep 2019 at 09:30
Session: Parallel 6
We discuss the scalar sector of a class of BSM models with enlarged gauge symmetry, the so called 331 models. For all of them the gauge group is $SU(3)_c\times SU(3)_L \times U(1)_X$ but, depending on a parameter entering in the definition of the electric charge operator, they allow different kind of new particles. Interestingly, the scalar potential is universal for the 331 models. We give an ove ... More
Presented by Antonio COSTANTINI on 13 Sep 2019 at 16:30
Session: Parallel 6
The precise study of the properties of the Higgs boson offers a unique and crucial opportunity to probe Beyond-the-Standard-Model (BSM) Physics indirectly. Among these, the Higgs trilinear coupling is of particular importance, because it determines the shape of the Higgs potential and in turn the nature of the electroweak phase transition (EWPT). It has been known for some time that, in a variety ... More
Presented by Dr. Johannes BRAATHEN on 13 Sep 2019 at 17:15
Session: Plenary 6
Presented by Nicolás BERNAL
Session: Plenary 4
Presented by Dr. Pedro FERREIRA on 11 Sep 2019 at 17:00
Session: Plenary 2
Presented by Prof. Gustavo C BRANCO on 11 Sep 2019 at 11:30
Session: Parallel 8
We extend the Standard Model (SM) with parity symmetry, motivated by the strong CP problem and dark matter. In our model, parity symmetry is conserved at high energy by introducing a mirror sector with the extra gauge symmetry, SU(2)R×U(1)R. The charges of SU(2)R×U(1)R are assigned to the mirror fields in the same way as in the SM, but the chiralities of the mirror fermions are opposite to respe ... More
Presented by Dr. Yuji OMURA on 14 Sep 2019 at 09:45
Session: Parallel 5
We present a model where the inflaton can naturally account for all the dark matter in the Universe within the warm inflation paradigm. In particular, we show that the symmetries and particle content of the warm little inflaton scenario (i) avoid large thermal and radiative corrections to the scalar potential, (ii) allow for sufficiently strong dissipative effects to sustain a radiation bath du ... More
Presented by Mr. Luís VENTURA on 13 Sep 2019 at 16:30
Session: Parallel 9
I will present our results on $b\to s\mu^+\mu^-$ transitions and possible correlations with the anomalous magnetic moment of the muon ($a_\mu$) within Two-Higgs-Doublet models with generic Yukawa couplings, including the possibility of right-handed neutrinos. We performed the matching on the relevant effective Hamiltonian and calculated the leading one-loop effects for $b\to s\ell\ell^{(\prime)}$, ... More
Presented by Dr. Christoph WIEGAND on 14 Sep 2019 at 09:30