4th IBS-MultiDark-IPPP Workshop

7 Oct 2019, 09:00 → 11 Oct 2019, 17:30 Asia/Seoul

B438 (IBS-CTPU)

Carlos Muñoz, David G. Cerdeño, Kiwoon Choi (IBS-CTPU), Kyu Jung Bae (IBS), Nassim Bozorgnia, Sanghyeon Chang (CTPU/IBS), Sven Heinemeyer

The IBS-MultiDark-IPPP Workshop on Dark Matter is the fourth event where IBS-CTPU, IPPP, and MultiDark are sharing strengths on the quest on the identification of the Dark Matter. 

The workshop is oriented towards dark matter physics and will cover a wide range of subjects. The aim is to promote the collaboration and exchange of ideas. The list of invited speakers includes theoretical as well as experimental physicists.

The Institute for Basic Science (IBS), comprises 30 centers, including three experimental and theoretical ones on particle physics and cosmology:

• Center for Theoretical Physics of the Universe (CTPU)
• Center for Axion and Precision Physics Research (CAPP)
• Center for Underground Physics (CUP)

MultiDark (Multimessenger Approach for Dark Matter Detection), is the Spanish project for dark matter searches consisting of 11 theoretical, experimental and astrophysics groups from 18 Spanish universities and research institutes.

The Institute for Particle Physics Phenomenology (IPPP), is a center of particle phenomenology in the UK and is a joint venture between Durham University and the Science and Technology Funding Council (STFC) of the UK.

Topics

• Direct Dark Matter detection 
• Indirect Searches 
• Colliders and Theory 
• Axions and ALPS 
• Astrophysics and Cosmology

Invited speakers 

BOZORGNIA, Nassim (IPPP, Durham University)
CERDEÑO, David G. (IPPP, Durham University)
CHOI, Ki-Young (Sungkyunkwan University)
GAGGERO, Daniele (IFT UAM-CSIC)
GAMMALDI, Viviana (IFT UAM-CSIC)
GOMEZ, Mario E. (Universidad de Huelva)
CHUN, Eung Jin (KIAS)
HA, Chang Hyon (CUP IBS)
HEINEMEYER, Sven (IFT/IFCA UAM-CSIC)
KADOTA, Kenji (CTPU IBS)
KAMADA, Ayuki (CTPU IBS)
LARA, Iñaki (CTPU IBS)
LONSDALE, Stephen (CTPU IBS)
MARTINEZ, Maria (Universidad de Zaragoza)
MASIP, Manuel (University of Granada)
MOLINÉ, Ángeles (IFT UAM-CSIC)
MOON, Chang-Seong (Kyungpook National University)
MUNOZ, Carlos (IFT UAM-CSIC)
PARK, Jong-Chul (Chungnam National University)
PARK, Myeonghun (SeoulTech)
PIERRE, Mathias (IFT UAM-CSIC)
ROTT, Carsten (Sungkyunkwan University)
SCOPEL, Stefano (Sogang University)
SENAHA, Eibun (CTPU IBS)
SETO, Osamu (Hokkaido University)
SHIN, Chang Sub (CTPU IBS)
WENIGER, Christoph (University of Amsterdam)
WITTE, Samuel (IFIC, University of Valencia)
YOUN, SungWoo (CAPP IBS)

 

 

Previous Events

• The 1st IBS-MultiDark Joint Focus Program
• The 2nd IBS-MultiDark-IPPP Workshop
• The 3rd IBS-MultiDark-IPPP Workshop

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Venue

IBS CTPU, Daejeon, Republic of Korea (location)

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Sponsored by

 

 

 

Poster poster3.pdf

Monday, 7 October

Session 1

Convener: Carlos Munoz

1 Results and Status of the COSINE project

The COSINE project aims at detecting dark-matter (DM) interactions using scintillating NaI(Tl) crystals. The project is staged in three phases: COSINE-100, COSINE-200, and COSINE-Ton that have increased target masses. The main goal of COSINE-100 and -200 is to check the annual modulation signal observed by DAMA/LIBRA in a NaI(Tl) crystal array. The goal of COSINE-Ton is to measure event-wise DM particle-nucleon interactions. The COSINE-100 experiment, with a total mass of 100 kg, has been taking data for more than three years in the low-background environment of the Yangyang underground laboratory. We will report recent COSINE-100 results and discuss future plans.

Speaker: Chang Hyon Ha (CUP IBS)

Slides MultiDark_2019_cosine_ChangHyon_Ha_v3.pdf

2 Search for annual modulation with ANAIS112: two years results

ANAIS (annual modulation with NaI Scintillators) is a dark matter direct detection experiment located at the Canfranc Underground Laboratory (LSC, Spain). Its main goal is to proof or refute in a model independent way the DAMA/LIBRA positive result: an annual modulation in the low-energy detection rate compatible with the expected signal induced by WIMPs in the galactic halo. This signal, observed during more than 20 years, is in strong tension with the negative results of other very sensitive experiments, but a direct comparison using the same target material (NaI(Tl)) is still lacking. ANAIS-112, consisting of 112.5 kg of NaI(Tl) scintillators, was installed at the LSC in August 2017. According to our prospects, it will achieve a 3σ sensitivity to the DAMA/LIBRA result within 5 years of data taking. In February 2019 we delivered the first results of ANAIS-112 corresponding to 1.5 years, being compatible with the absence of modulation and in some tension with DAMA/LIBRA. On this talk, after presenting the ANAIS-112 experimental set-up and performance, we will provide an update of the experimental results corresponding to 2 years of data.

Speaker: Maria Martinez (Universidad de Zaragoza)

Slides IBSMD_daejon19_MMartinez_full.pdf

15:00 Coffee Break

Session 2

Convener: Manuel Masip

3 Interpreting the WIMP Sibyl

Without any evidence of physics beyond the Standard Model from Accelerator Physics interpreting the data of Dark Matter search experiments appear as obscure and contradictory as the prophecies of the Sybil of Dodona, who predicted death and survival to a soldier in the same sentence. To address this problem we have no other choice than to adopt model-independent approaches. To help achieve this task we have developed WimPyDD, a flexible and customizable object-oriented code written in Python that incorporates in a modular way all the different required inputs, both experimental (data, efficiency, energy resolution, light/charge yield/quenching, estimated backgrounds) and theoretical (non-relativistic couplings, velocity distribution , form factors, kinematics) to analyze direct detection data in virtually any WIMP scenario. WimPyDD will be made public in the near future and has already been successfully tested in several publications. In my talk I will show that, as in the case of the ancient Sybil answer, also WIMP direct data can have multiple interpretations. For instance, if direct detection data is analyzed in terms of the most general non-relativistic WIMP-nucleon interaction allowed by Galilean invariance and relaxing the standard assumptions about the dark halo velocity distribution the DAMA modulation effect turns out to be still allowed by the constraints of other experiments, while the sensitivity of apparently less competitive experiments becomes essential in covering some regions of the parameter space. We will need to analyze future data in the same open way if we want to be prepared for the unexpected.

Speaker: Stefano Scopel (Sogang University)

Slides scopel_IBS_MULTIDARK_2019_last.pptx

4 Dark matter assisted neutrino oscillation

We study neutrino oscillations in a medium of dark matter which generalizes the standard matter effect. A general formula is derived to describe the effect of various mediums and their mediators to neutrinos. Neutrinos and anti-neutrinos receive opposite contributions from the asymmetric distribution of (dark) matter and anti-matter, and thus it could appear in precision measurements of neutrino or anti-neutrino oscillations. Furthermore, neutrino oscillations can occur from the symmetric dark matter effect even for massless neutrinos.

Speaker: Kiyoung Choi (Sungkyunkwan University)

Slides DMANO_Multidark.pdf

16:30 Coffee Break

Session 2

Convener: Manuel Masip

5 The gravitino, the muon anomalous magnetic moment and long lived particles at the LHC

The μνSSM is the minimal supersymmetric extension of the standard model capable of solving the mu problem of the MSSM and generating neutrino masses, through an R-parity violating coupling between Higgs superfields and righ-handed neutrino superfields. The smallness of the neutrino Yukawa coupling, necessary for generating correct neutrino physics, dictates the size of the R-parity violating (RPV) interactions. For this reason, the gravitino has a life-time long enough to be a viable dark matter candidate. In addition, the smallness of RPV causes a suppression of the decay amplitude of the lightest supersymmetric particle big enough to make its decay displaced at colliders. Light smuons are possible in the model and could explain the discrepancy between the experimentally measured value of the anomalous magnetic moment of the muon and the SM prediction. Predicting at the same time signatures of long lived particles at the LHC

Speaker: Iñaki Lara Perez (CTPU IBS/IFT UAM-CSIC)

Slides Presentation_g-2.pdf

Tuesday, 8 October

Session 3

Convener: Seodong Shin

6 Dark and shiny dresses around astrophysical and primordial black holes

The birth of gravitational wave astronomy has been a major recent breakthrough in physics. The recent discovery of gravitational wave signals from merger events of massive binary-black-hole (BBH) systems have prompted a renewed debate in the scientific community about the existence of primordial black holes (PBHs) of O(1-100) solar masses. These objects may have formed in the early Universe and could constitute a significant portion of the elusive dark matter that, according to standard cosmology, makes up the majority of the matter content in the universe. I will review the most recent development of this field, with particular focus on the mass window of interest for the LIGO and Virgo gravitational observatories. I will first discuss in detail the most updated computations of the expected merger rate of a hypothetical subdominant population of primordial black holes, taking into account the impact of the dark matter “dresses” that are expected to form around these objects. In the second part, I will present the prospects of discovery for both this hypothetical PBH population and the guaranteed population of astrophysical isolated black holes in our Galaxy, based on the radio and X-ray emission from the interstellar gas that is being accreted onto them (the “shiny dress”). A future detection will be possible thanks to the expected performance of forthcoming radio facilities such as SKA and ngVLA. I will mention the possible consequences of such discovery on the existence of other dark matter candidates.

Speaker: Daniele Gaggero (IFT UAM-CSIC)

Slides talk_PBH_MultiDarkKorea2019_DG.pdf

7 Hunting small dark matter halos in strongly lensed images with backpropagation

The analysis of strongly gravitationally lensed radio and optical images has the potential to probe dark matter (sub-)halos with masses several orders of magnitude below the mass of dwarf spheroidal galaxies. However, correctly analyzing these images is a rather complex task, since it requires a careful stochastic modeling of the source, the lense, and the instrumental characteristics. Expected observations with, e.g., the planned ELT, make it particularly urgent to develop new analysis techniques that allow a fast, accurate and flexible analysis of strongly lensed images. I will here discuss several ways in which both deep neural networks and differentiable probabilistic programming might be able to drastically improve the way in which upcoming images will be analysed, pathing the way for confirmation or falsification of the cold dark matter paradigm.

Speaker: Christoph Weniger (University of Amsterdam)

Slides lensing_ML_Weniger.pdf

10:30 Coffee Break

Session 4

Convener: Viviana Gammaldi

8 The 21cm probes on the light dark matter

The particle cosmological probes on the light scalar fields will be discussed, and, in particular as a concrete example, the radio telescope probe (such as the square kilometer array) on the axion-like particle dark matter will be presented as a promising future endeavor.

Speaker: Kenji Kadota (CTPU IBS)

Slides IBSIPPPkadota.pdf

9 The Sun at the TeV: gammas, neutrons, neutrinos, and a cosmic ray shadow

High energy cosmic rays (CRs) reaching the surface of the Sun produce an energy dependent shadow that has been detected by several observatories. The "missing" CRs are processed there into secondary particles, including gammas, neutrons and neutrinos that may reach the Earth unaffected by the solar magnetic field. These solar particles are a background in indirect searches for dark matter at gamma ray observatories and neutrino telescopes. Here we discuss the correlation of the CR shadow of the Sun with the flux of GeV--TeV neutral particles. We obtain a gamma flux that seems consistent with Fermi-LAT observations and provide predictions for the neutron and neutrino fluxes.

Speaker: Manuel Masip (Universidad de Granada)

Slides masip.pdf

12:00 Lunch

Session 5

Convener: Sam Witte

10 Self-heating dark matter: semi-annihilation + self-interaction

Thermal freeze-out of dark matter is a prominent mechanism to explain the relic abundance. There are several processes suggested to govern thermal freeze-out: pair-annihilation, semi-annihilation, and 3-to-2 process. Among them, semi-annihilation is distinctive. It causes an efficient conversion from the mass energy into the kinetic energy in collaboration with self-interaction. This phenomenon is dubbed as self-heating. I will discuss both the early and late stages of structure formation of the Universe in self-heating dark matter. Particular stress is put on that the impact of self-heating drastically increases toward smaller-size halos.

Speaker: Ayuki Kamada (CTPU IBS)

Slides kamada1008.pdf

11 Nu physics in direct detection experiments

Direct detection experiments are probing the nature of dark matter particles with increasing sensitivities by looking for their scattering off nuclei (or electrons) in underground detectors. Future experiments, with increased payloads and lower energy thresholds, will have access to wide areas of the parameter space. The search for dark matter is, however, limited by a Standard Model background: the coherent elastic neutrino-nucleus scattering cross section, usually expressed as a "neutrino floor". The neutrino floor can receive contributions from new physics models in the neutrino sector. I will present the predictions for various new physics models to calculate the maximum value of the neutrino floor, showing that it can be as large as various orders of magnitude. In the light of these results, future claims by direct detection experiments exploring the low-mass window must be carefully examined if a signal is found well above the expected Standard Model neutrino floor.

Speaker: David Cerdeno (IPPP, Durham University)

Slides Cerdeno.pdf

15:00 Coffee Break

Session 5

Convener: Sam Witte

12 The dark matter component of the Gaia anisotropic substructure

Recently, a prominent population of stars with a high radial velocity anisotropy has been discovered in the inner stellar halo, using the second data release from the Gaia satellite. An important question regarding this stellar structure is the properties of its unknown dark matter component in the Solar neighborhood. Determining the fraction and anisotropy of this dark matter component is especially important for the interpretation of dark matter direct detection results, which strongly depend on the local dark matter distribution. I will discuss the properties of the dark matter component of the Gaia anisotropic substructure, using the Auriga magneto-hydrodynamical simulations of galaxy formation. In particular, I will present the local dark matter density and velocity distributions of the simulated Milky Way-like halos with and without the anisotropic substructure, and discuss their implications for dark matter direct detection.

Speaker: Nassim Bozorgnia (IPPP, Durham University)

Slides Bozorgnia-IBS.pdf

16:00 Coffee Break

Panel Discussion

13 With IPPP panels

Is DAMA falsifiable? How wrong is the Standard Halo Model? When do we give up on WIMPs? Is there life below the neutrino floor?

18:00 Workshop Dinner

Wednesday, 9 October

Session 6

Convener: Thomas Flacke

14 Confronting Grand Unification with LFV Dark Matter and LHC data

We will review the expectations for LFV, LHC and dark matter searches, for different grand unification groups, paying particular attention to the comparison between their distinct signatures, and to ways to differentiate between the various schemes in present and future searches. Since SO(10) is by now already too constrained by the data, we will focus on SU(5), flipped SU(5) and SU(4)c × SU(2)L ×SU(2)R (4-2-2). Similarly to previous works for various GUTs, we assume that at the unification scale the SUSY soft terms still preserve the group symmetry, and focus on the effects derived from the gauge structure of the groups.

Speaker: Mario Gomez (Universidad de Huelva)

Slides 11_mgomez_IBS19.pdf

15 Deep Learning for the LHC physics

In this talk, I would like to discuss how one can utilize Deep Learning for the LHC physics, with an example of Higgs. I will also talk about how one can apply DL properly to the LHC physics problems.

Speaker: Myeonghun Park (Seoultech)

Slides PARK_PDF.pdf

10:30 Coffee Break

Session 7

Convener: Mario Gomez

16 Searches for Dark Sector at CMS

Dark matter (DM) is one of the most compelling piece of evidence for physics beyond the standard model (BSM). If non-gravitational interactions exist between DM and Standard Model (SM) particles, DM could be produced by colliding SM particles at high energy. Thus, one important goal of the Large Hadron Collider (LHC) is to find the DM signature. Since the DM particles leave the detector without a measurable signature, one way to observe them is when they are produced in association with a visible SM particle, called MET+X where MET is the missing transverse energy. Thus, the strategy to search for DM at the LHC is to use a large MET due to the DM, which is a recoil of SM particles for DM particles. If the DM particles are produced with SM particles X, it refers as “mono-X” process. We present the latest results on the Dark Sector searches at 13 TeV with the Run II data collected from the CMS experiment.

Speaker: Chang-Seong Moon (Kyungpook National University)

Slides 19.10.09_4th_IBS-MultiDark-IPPP_Workshop_Chang-Seong_Moon_v2.pdf

17 Global fit to DM with leptophobic mediators

We present results for a global fit to a simplified DM model with leptophobic mediators and fermionic DM. We show which regions in the parameter space and which annihilation mechanism are preferred taking into account all relevant experimental data. We make predictions where to find the DM particles and the mediators.

Speaker: Sven Heinemeyer (IFT UAM-CSIC)

Slides sven.pdf

Thursday, 10 October

Session 8

Convener: Kyu Jung Bae

18 Axion research at IBS/CAPP

The axion is a hypothetical particle of the Peccei-Quinn solution to the strong-CP problem in particle physics. With some constraints on mass, it also possesses a cosmological implication to account for cold dark matter. Since 2013, IBS/CAPP has been establishing state of the art experiments to search for axion dark matter in Korea. Relying on the cavity haloscope, multiple experiments are operating to explore different mass regions in parallel with high sensitivities. The ultimate goal is to probe the QCD axion models up to 100 μeV. The strategic research efforts are twofold – 1) utilizing advanced technologies, including high field superconducting (SC) magnets, cryogenic dilution refrigerators, quantum-limited noise amplifiers, and 2) developing unique features, such as high-Q SC cavities and high-frequency/large-volume cavities. We present the current status and future prospects of the experiments and discuss the R&D activities at IBS/CAPP.

Speaker: SungWoo Youn (CAPP IBS)

Slides IBS-MultiDark-IPPP_YOUN.pptx

19 Axion scales and couplings with Stückelberg mixing

In this talk, I will discuss about the axion field range and low energy couplings in models with Stückelberg mixing between axions and U(1) gauge bosons. It is noted that the gauge-invariant axion combination in the model is periodic modulo an appropriate shift of gauge-variant axions eaten by the massive U(1) gauge bosons, which in some cases makes the connection between the field range and the low energy couplings less transparent. I will identify the field basis for which all non-derivative couplings of a are quantized in a manner manifestly consistent with the periodicity of the axion. Generically Stückelberg mixing reduces the axion field range.

Speaker: Chang Sub Shin (CTPU IBS)

Slides CSShin.pdf

10:30 Coffee Break

Session 9

Convener: Nassim Bozorgnia

20 Probing the Neutrino Mass Mechanism with the CMB

A generic feature of many neutrino mass models is the prediction of a pseudo-Goldstone mode arising from the spontaneous symmetry breaking of lepton number. This new particle, the so-called majoron, can modify the evolution of the energy density of the Universe and damp neutrino perturbations around the time of recombination, leading to distinctive signatures in the CMB. I will show that current Planck data already probes neutrino couplings as small as ~1e-13, which if interpreted in the context of the type-I seesaw mechanism corresponds to lepton symmetry breaking scales on the order of ~100 GeV. I will further show that the presence of such a particle can assist in ameliorating the Hubble tension.

Speaker: Samuel Witte (University of Valencia)

Slides Majoron_CMB_pdf.pdf

21 Asymmetric dark matter and cold dark sectors

There is a remarkable similarity between the dark matter mass density, of unknown origins, and the baryonic mass density which originates from a minuscule 1 in 10 billion asymmetry between matter and antimatter. Asymmetric dark matter models propose that a connected asymmetry generation mechanism is responsible for the abundance of both sectors. In this talk I will review these motivations before exploring some constrains on ADM models and dark sectors and how these can often necessitate cold dark sectors. Finally I will discuss a variety of ways that naturally cold dark sectors can arise.

Speaker: Stephen Lonsdale (CTPU IBS)

Slides SJLtalk.pdf

12:00 Lunch

Session 10

Convener: Ayuki Kamada

22 Multi-TeV (brane-world) dark matter: a mini overview

We focus on the multi-TeV dark matter candidate among other weak interactive massive particles. We present both the state-of-the-art on this sub-field and recent sensitivity analyses for the Square Kilometer Array (SKA), the High Altitude Water Cherenkov (HAWC) and the Cherenkov Telescope Array (CTA). We present recent results for both model independent analyses and the particular case of a 50 TeV thermal branon dark matter candidate. We discuss open questions and experimental limitations.

Speaker: Viviana Gammaldi (IFT UAM-CSIC)

Slides Korea_Multi_TeV.pdf

23 Dark Matter at Neutrino Telescopes

The talk will review recent progress in the search for dark matter at neutrino telescopes. A particular focus will be set on the opportunity to probe light dark matter models, through the interaction of astrophysical neutrinos with Galactic and extra-galactic dark matter. Limits on the dark matter neutrino scattering busing the reported evidence for the first identified source of the high energy astrophysical neutrinos (Blazar TXS0506+056) will be reported.

Speaker: Carsten Rott (Sungkyunkwan University)

Slides Rott_IBS_MultiDark_2019.pdf

15:00 Coffee Break

Session 10

Convener: Ayuki Kamada

24 Subhalo properties in an interacting dark matter scenario

One possible and natural deviation from the collisionless cold dark matter (CDM) standard cosmological framework is the assumption of the existence of interactions between dark matter (DM) and photons or neutrinos. Such interacting DM models would imply a suppression of small-scale structures due to a large collisional damping effect and can help alleviate alleged tensions between standard CDM predictions and observations at small mass scales. In this talk, I will present the properties of DM subhalos formed in a high-resolution cosmological N-body simulation specifically run within these alternative models. I will also compare our results with the one obtained in the standard cosmological scenario. Such analyzes have a direct application on studies aimed at the indirect detection of DM where subhalos are expected to boost the DM signal.

Speaker: Angeles Moline (IFT UAM-CSIC)

Slides MD_Corea_Moline.pdf

16:00 Coffee Break

Panel Discussion

25 With IBS panels

Theories beyond WIMP: 1. Dark Matter theories leading to novel signatures in various experiments 2. Dark Matter theories with rich astrophysical/cosmological implications

Friday, 11 October

Session 11

Convener: David Cerdeno

26 Vector SIMP dark matter with approximate custodial symmetry

Strongly Interacting Massive Particles (SIMPs) have recently been proposed as light thermal dark matter relics. Here we consider an explicit realization of the SIMP mechanism in the form of vector SIMPs arising from an SU(2)X hidden gauge theory where the approximate custodial symmetry determines comparable but split masses for SU(2)X gauge bosons We will discuss the various several ways of equilibrating the dark and visible sectors in this setup and present in detail the current constraints and projections from colliders and direct detection experiments.

Speaker: Mathias Pierre (IFT UAM-CSIC)

Slides IBS_Multidark_IPPP_2019.pdf

27 Electrowek phase transition in a model for dark matter and muon g-2 anomaly

Phenomenological consequences of the strong first-order electroweak phase transition are discussed in an extension of the standard model with an inert doublet and vector-like leptons motivated by dark matter and the muon g−2 anomaly. We point out that a condition for the strong first-order electroweak phase transition inevitably induces a large logarithmic enhancement in Z boson decays, which relegates the explanation of the anomalous muon g-2 at below 2 sigma level. Future tests of the scenario are also discussed.

Speaker: Eibun Senaha (CTPU IBS)

Slides IBS-MultiDark-IPPP_senaha.pdf

10:30 Coffee Break

Session 12

Convener: Chang Sub Shin

28 Scalar dark matter interacting through an extra U (1) gauge interaction

We propose models of a thermal relic DM with the present annihilation cross-section being very suppressed. This property can be realized in an extra U(1) gauge interacting complex scalar DM. We consider scalar dark matter in U(1)B−L,U(1)(B−L)3 and U(1)Lμ−Lτ extended models and identify viable parameter regions. We also discuss various implication to future DM detection experiments, the DM interpretation of the gamma ray excess in the globular cluster 47 Tucanae, the muon anomalous magnetic moment, the Hubble Tension and others.

Speaker: Osamu Seto (Hokkaido University)

Slides 4thIBSMultiIP3(Seto).pdf

29 Flavourful axion phenomenology

We show how an accidental U(1) Peccei-Quinn symmetry can arise in a realistic Pati-Salam unified theory of flavour. A QCD axion arises from a linear combination of A4 triplet flavons, which are responsible for fermion flavour structures and thus specific flavour-violating couplings of the axion are predicted. Then, we discuss the phenomenology of a general flavourful axion and the prospect of probing it in future experiments.

Speaker: Eung Jin Chun (KIAS)

Slides 191011-IBS-FlavorAxion.pdf

12:00 Lunch

Session 13

Convener: Sven Heinemeyer

30 Searching for Dark Matter Signals from Timing Spectra at Neutrino Experiment

We propose a novel strategy to search for new physics signals in timing spectra, envisioning the situation in which a new particle comes from the decay of its heavier partner with a finite particle width. The timing distribution of events induced by the dark matter particle scattering at the detector may populate in a relatively narrow range, forming a "resonance-like" shape. Due to this structural feature, the signal may be isolated from the backgrounds, in particular when the backgrounds are uniformly distributed in energy and time. We analyze the existing CsI detector data of the COHERENT experiment with a timing cut and an energy cut, and find an excess in the timing distribution which can be explained by dark matter. Our new approach can be generally utilized for searching for new physics such as light dark matter or non-standard neutrino interaction in coherent neutrino scattering experiments including CCM, COHERENT, and JSNS^2.

Speaker: Jong-Chul Park (Chungnam National University)

Slides TimingSpectra_JCPark_pdf.pdf

31 Neutrinos as drivers of decaying gravitino DM and novel LHC signals

Speaker: Carlos Munoz (IFT UAM-CSIC)

Slides 2019_Oct_IBS-MD-IPPP_daejeon_MUNOZ_web.pdf

15:00 Coffee Break

Panel Discussion

32 With MultiDark Panels

Where are we with the Multi Messenger approach? Where do we see current or future synergy of DD/ID/collider searches?