# Warsaw Workshop on Non-Standard Dark Matter: multicomponent scenarios and beyond

2-5 June 2016
CENT I and CENT II (Faculty of Physics) buildings
at the Ochota Campus of the University of Warsaw
Europe/Warsaw timezone
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Displaying 76 contributions out of 76
The search for dark matter, which comprises ~25\% of the energy content of the universe, is today one of the most exciting fields in particle physics. As bigger detectors are being built to increase their sensitivity, background reduction is an ever more challenging issue. To this end, a new type of dark matter detector is being developed, a xenon bubble chamber, which would combine the strengths ... More
Presented by Prof. Matthew SZYDAGIS
Session: parallel session
Presented by Matthew SZYDAGIS on 4 Jun 2016 at 17:10
Session: Session 3
Presented by Kai SCHMIDT-HOBERG on 3 Jun 2016 at 10:30
Session: Session 3
Presented by Mads Toudal FRANDSEN on 3 Jun 2016 at 10:00
Session: Session 7
Presented by Georg RAFFELT on 4 Jun 2016 at 09:00
Session: Session 7
Presented by Javier REDONDO on 4 Jun 2016 at 10:00
Session: Session 8
Presented by Kalliopi PETRAKI on 4 Jun 2016 at 12:30
Session: parallel session
Presented by Pritpal SANDHU on 4 Jun 2016 at 16:30
Session: Session 12
Presented by HAI-BO YU on 5 Jun 2016 at 12:30
Session: Session 6
Presented by Géraldine SERVANT on 3 Jun 2016 at 16:30
Session: Session 7
Presented by David MARSH on 4 Jun 2016 at 09:30
Axions (and other light bosons) with masses in the range $10^{-33}\text{ eV}\lesssim m\lesssim 10^{-18}\text{ eV}$ have distinctive effects on cosmology. These effects allow one to observationally distinguish ultralight axions from the other major cosmological components of dark energy, cold dark matter, warm dark matter, and neutrinos. Current observations of the cosmic microwave background and l ... More
Presented by Dr. David MARSH
Presented by Zackaria CHACKO on 2 Jun 2016 at 15:30
Session: Session 3
Presented by Raman KHURANA on 3 Jun 2016 at 09:00
Session: Session 8
Presented by Francesco SANNINO on 4 Jun 2016 at 11:30
Presented by Mayumi AOKI
The XMASS program is implemented through a large volume of liquid Xe scintillation expermeints at Kamioka in Japan. In the current stage, we focus on the the direct detection of dark matter with 832 kg liquid Xe. We have achieved the low energy threshold (~0.6keVee) thanks to the high scintillation light yield that allows us the low mass WIMPs search and a study of annual modulation due to da ... More
Presented by Dr. Kazuyoshi KOBAYASHI
Session: parallel session
Presented by Kazuyoshi KOBAYASHI on 4 Jun 2016 at 16:50
Session: parallel session
Presented by Tim LINDEN on 4 Jun 2016 at 14:50
Asymmetric dark matter forms a well motivated class of dark matter models with unique detection characteristics. In particular, if asymmetric dark matter has a non-negligible nuclear scattering cross-section, it will accumulate efficiently in neutron star cores, potentially causing neutron star collapse. Due to the extremely high mass and detailed modeling of neutron star populations, observations ... More
Presented by Dr. Tim LINDEN
Session: Session 5
Presented by Jocelyn MONROE on 3 Jun 2016 at 14:30
Session: Session 2
Presented by Eugenio DEL NOBILE on 2 Jun 2016 at 17:30
Session: parallel session
Presented by Jackson CLARKE on 4 Jun 2016 at 14:50
I will outline the unique direct detection phenomenology which arises if dark matter is self-interacting. The crucial point is that, in the Earth frame, the halo wind interaction with Earth-captured dark matter generically results in a spatially dependent near-Earth dark matter environment. This implies distinctive signatures in the direct detection signal, including latitudinal dependence, and mo ... More
Presented by Mr. Jackson CLARKE
Semi-annihilation is a generic feature of dark matter which is stabilized by a symmetry group larger than Z2. We systematically classify and enumerate effective operators up to dimension 6 for scalar and/or fermionic dark matter, with a focus on models where annihilation is suppressed. We show when and how different two-to-two processes are generated from a single effective operator. We additio ... More
Presented by Dr. Andrew SPRAY
Session: Session 12
Presented by Andrew SPRAY on 5 Jun 2016 at 11:30
Session: Session 11
Presented by Mikhail MEDVEDEV on 5 Jun 2016 at 10:30
Session: Session 2
Presented by Francis-Yan CYR-RACINE on 2 Jun 2016 at 19:00
The effective theory of structure formation (ETHOS) allows the classification of dark matter theories according to their structure formation properties rather than their intrinsic particle properties. This makes ETHOS a particularly useful framework for comparing theoretical predictions of extended dark matter scenarios to actual cosmological and astrophysical observations. Using this effective th ... More
Presented by Dr. Francis-Yan CYR-RACINE
Session: Session 6
Presented by Oleg LEBEDEV on 3 Jun 2016 at 17:00
I will present a general classification of simplified models of dark matter coannihilation. Main phenomenological features of these models will be discussed by introducing general classes of LHC signatures. Several novel signatures that are not covered in current LHC searches will be emphasized. The class of models with a QCD charged coannihilation partner, highly relevant for LHC studies and inte ... More
Presented by Anna KAMINSKA
Session: parallel session
Presented by Anna KAMINSKA on 4 Jun 2016 at 15:30
Session: Session 2
Presented by Jarah EVSLIN on 2 Jun 2016 at 18:00
I will review recent challenges to WIMP dark matter models and describe how some of them are addressed by giant monopole models. These models exist in theories with a dark sector including a dark SU(2) gauge symmetry coupled to an adjoint Higgs and two fundamental fermions. Several consistency checks of such models will be described, including consistency with MACHO bounds and the CMB power spec ... More
Presented by Prof. Jarah EVSLIN
Session: Session 5
Presented by Christoph WENIGER on 3 Jun 2016 at 15:00
Session: Session 8
Presented by Hooman DAVOUDIASL on 4 Jun 2016 at 12:00
Session: parallel session
Presented by Piotr HOMOLA on 4 Jun 2016 at 15:10
The theoretical effort towards explaining the nature of Dark Matter must well recognize and assimilate the experimental results. However, if these results are taken without an appropriate care and criticism, whole classes of theoretical scenarios might be ruled out prematurely. I'll present an example of such an efficient experimental thinking-blocker: the apparent lack of photons in the flux of u ... More
Presented by Dr. Piotr HOMOLA
Session: parallel session
Presented by Aqeel AHMED
We consider an extended model with the hidden SU(3) symmetry.The SU(3) symmetry is broken by non-zero vacuum expectation values of two SU(3) triplets. After the symmetry breaking, the Z2xZ2 symmetry remains as an intrinsic symmetry of the original gauge symmetry. Because of the Z2xZ2 symmetry, this model includes multi-component dark matter particles. We discuss phenomenology of the multi-componen ... More
Presented by Dr. Takashi TOMA
Session: Session 12
Presented by Takashi TOMA on 5 Jun 2016 at 12:00
Session: parallel session
Presented by Takashi TOMA
Low-mass boson dark matter particles produced after Big Bang form classical field and/or topological defects. In contrast to traditional dark matter searches, effects produced by interaction of an ordinary matter with this field and defects may be first power in the underlying interaction strength rather than the second power or higher (which appears in a traditional search for the dark matter) [1 ... More
Presented by Prof. Victor FLAMBAUM
Session: Session 12
Presented by Victor FLAMBAUM
Session: parallel session
Presented by A. Murat GULER GULER
Nowadays there is compelling evidence for the existence of dark matter in the Universe. A general consensus has been expressed on the need for a directional sensitive detector to confirm, with a complementary approach, the candidates found in “conventional” searches and to finally extend their sensitivity beyond the limit of neutrino-induced background. We propose here the use of a detector ba ... More
Presented by Prof. A. Murat GULER GULER
Session: parallel session
Presented by Tommi TENKANEN on 4 Jun 2016 at 16:50
Can dark matter properties be constrained if dark matter particles interact only very feebly with the Standard Model fields? The answer is yes. By studying both cosmological and astrophysical constraints, we show that stringent constraints on dark matter properties can be derived even if the dark matter sector is practically uncoupled from the Standard Model sector. By taking the Higgs portal mode ... More
Presented by Mr. Tommi TENKANEN
Session: Session 11
Presented by Andrey DOROSHKEVICH on 5 Jun 2016 at 10:00
Session: Session 3
Presented by Leszek ROSZKOWSKI on 3 Jun 2016 at 09:30
Session: Session 4
Presented by Felix KAHLHOEFER on 3 Jun 2016 at 12:00
Session: parallel session
Presented by Sonja ESCH on 4 Jun 2016 at 16:30
Two major questions of the Standard are neutrino masses and dark matter. The minimal model T12A addresses both by introducing new particles, scalars and fermions as singlets and doublets. This allows for the radiative generation of neutrino masses but also leads to the occurrence of lepton flavor violating processes. In our work we will study the parameter space of the model imposing the ... More
Presented by Ms. Sonja ESCH
We consider a scenario where the inflaton decays to a hidden sector weakly coupled to the visible sector. Dark matter freezes out in the hidden sector and later a tiny portal coupling between the hidden and the visible sector heats the visible sector so that the Standard Model degrees of freedom dominate the energy density, before Big Bang Nucleosynthesis. We confront this scenario against differe ... More
Session: parallel session
Presented by Ville VASKONEN on 4 Jun 2016 at 17:10
Although the search for standard, moderate-mass WIMPs continues in earnest across the globe with different detection technologies, the continued lack of a conclusive discovery has encouraged the opening up of other pursuits. This talk will discuss the present capabilities of the world-leading LUX experiment, which has recently published new spin-independent as well as spin-dependent limits, and th ... More
Presented by Prof. Matthew SZYDAGIS
Session: parallel session
Presented by Matthew SZYDAGIS on 4 Jun 2016 at 15:30
This is an abstract of a talk.
Presented by Mr. Mateusz DUCH
Session: parallel session
Presented by Mateusz DUCH on 4 Jun 2016 at 15:10
Session: parallel session
Presented by Bryan ZALDIVAR
Self-Interacting Dark Matter is a popular solution to the small-scale problems of cold dark matter. In this talk, it will be shown how it is possible to obtain the desired amount of self-interactions from dark matter candidates which have never been in equilibrium with the visible sector, while at the same time avoiding all the phenomenological issues present in a large variety of models proposed ... More
Presented by Mr. Bryan ZALDIVAR
Session: Session 4
Presented by Bryan ZALDIVAR on 3 Jun 2016 at 11:30
Session: Session 5
Presented by Genevieve BELANGER on 3 Jun 2016 at 15:30
Presented by Genevieve BELANGER
Dark matter with mass of a few GeV can lead to observable signals in gamma rays with energies peaked at O(100 MeV). In such scenarios a significant part of the signal falls into the „MeV gap”, a drop in sensitivity of current observational coverage with energies in the range 0.1-100 MeV. A gap that will soon be probed by new planned experiments. In this talk we point out the existence of novel ... More
Presented by Dr. Andrzej HRYCZUK
Session: parallel session
Presented by Andrzej HRYCZUK on 4 Jun 2016 at 14:30
Session: Session 7
Presented by Josef PRADLER on 4 Jun 2016 at 10:30
A generic prediction of Coleman-Weinberg inflation is the existence of a heavy particle sector whose interactions with the inflaton generate the inflaton potential at loop level. If the heavy sector contains stable states, a relic abundance of those is generated at the end of inflation by gravity alone. This general feature, and the absence of any particle physics signal of dark matter so far, cal ... More
Presented by Dr. Kristjan KANNIKE
Session: Session 2
Presented by Kristjan KANNIKE on 2 Jun 2016 at 18:30
Session: Session 2
Presented by Hai-Bo YU on 2 Jun 2016 at 17:00
1. Predictions of our model and especially fittings with measured data indicate a possible presence of an other universe in our known one. In our previous publication we have reported about our finding that possibly a smaller twin Universe was born in the Big Bang and passing through our Universe it left to the multiverse space. Taking this seriously we can start describe such a double event and t ... More
Presented by Dr. Zoltan ARVAY
Session: Session 4
Presented by Joerg JAECKEL on 3 Jun 2016 at 12:30
Presented by Marek TRIPPENBACH on 2 Jun 2016 at 16:55
Session: parallel session
Presented by Nicolás BERNAL on 4 Jun 2016 at 14:30
Dark matter with strong self-interactions provides a compelling solution to several small-scale structure puzzles. Under the assumption that the coupling between dark matter and the Standard Model particles is suppressed, such strongly interacting massive particles (SIMPs) allow for a successful thermal freeze-out through N-to-N' processes, where N dark matter particles annihilate to N' of them. I ... More
Presented by Dr. Nicolás BERNAL
Session: Session 5
Presented by Jesús ZAVALA FRANCO