# TeVPA 2018

27-31 August 2018
LVH, Luisenstraße 58, 10117 Berlin
Europe/Berlin timezone
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# Dark Matter

## Place

Location: LVH, Luisenstraße 58, 10117 Berlin
Address: LANGENBECK VIRCHOW HAUS Luisenstraße 58, 10117 Berlin
Date: from 27 Aug 14:00 to 31 Aug 15:45

## Description

Chair 1: Louise Oakes | Chair 2: Nathan Kelley-Hoskins | Chair 3: Klaus Eitel | Chair 4: Dan Hooper | Chair 5: Daniele Gaggero | Chair 6: Michele Doro | Chair 7: Mónica Vázquez-Acosta

## Conveners

• 27 Aug 14:00 - 3:45 PM 1
• Prof. Schumann, Marc (Univertity of Freiburg)
• Dr. Sánchez-Conde, Miguel (IFT UAM/CSIC)
• Oakes, Louise (Humboldt Universität zu Berlin)
• 27 Aug 16:15 - 6:00 PM 2
• Prof. Schumann, Marc (Univertity of Freiburg)
• Dr. Sánchez-Conde, Miguel (IFT UAM/CSIC)
• Oakes, Louise (Humboldt Universität zu Berlin)
• 28 Aug 14:00 - 3:45 PM 3
• Prof. Schumann, Marc (Univertity of Freiburg)
• Dr. Sánchez-Conde, Miguel (IFT UAM/CSIC)
• Oakes, Louise (Humboldt Universität zu Berlin)
• 29 Aug 16:15 - 6:00 PM 4
• Prof. Schumann, Marc (Univertity of Freiburg)
• Dr. Sánchez-Conde, Miguel (IFT UAM/CSIC)
• Oakes, Louise (Humboldt Universität zu Berlin)
• 30 Aug 14:00 - 3:45 PM 5
• Prof. Schumann, Marc (Univertity of Freiburg)
• Dr. Sánchez-Conde, Miguel (IFT UAM/CSIC)
• Oakes, Louise (Humboldt Universität zu Berlin)
• 30 Aug 16:15 - 6:15 PM 6
• Prof. Schumann, Marc (Univertity of Freiburg)
• Dr. Sánchez-Conde, Miguel (IFT UAM/CSIC)
• Oakes, Louise (Humboldt Universität zu Berlin)
• 31 Aug 14:00 - 3:45 PM 7
• Prof. Schumann, Marc (Univertity of Freiburg)
• Dr. Sánchez-Conde, Miguel (IFT UAM/CSIC)
• Oakes, Louise (Humboldt Universität zu Berlin)

## Timetable | Contribution List

Displaying 45 contributions out of 45
Type: Talk Session: Dark Matter
Track: Dark Matter
The idea that primordial black holes (PBHs) of O(10) solar mass can account for most of the dark matter has been recently reconsidered after the discovery of gravitational waves from binary-black hole merger events. I present a significant update of a robust bound on this scenario based on a conservative modeling of the gas accretion and the subsequent radio and X-ray emission originating by a po ... More
Presented by Dr. Daniele GAGGERO on 30/8/2018 at 15:05
Type: Talk Session: Dark Matter
Track: Dark Matter
The theoretical interpretation of dark matter experiments is hindered by uncertainties of the dark matter density and velocity distribution inside the Solar System. In order to quantify those uncertainties, we present a parameter that characterizes the deviation of the true velocity distribution from the Maxwell-Boltzmann form, and we then determine for different values of this parameter the most ... More
Presented by Andreas RAPPELT on 29/8/2018 at 15:00
Type: Talk Session: Dark Matter
Track: Dark Matter
The discovery of dark matter (DM) at XENONnT or LZ would place constraints on DM particle mass and coupling constants. It is interesting to ask when these constraints can be compatible with thermal production of DM. We address this question within the most general set of renormalizable models that preserve Lorentz and gauge symmetry, and that extend the standard model by one DM candidate of mass $... More Presented by Martin KRAUSS on 28/8/2018 at 13:30 Type: Talk Session: Dark Matter Track: Dark Matter Installed on the ISS in August 2015 and taking data since October of that year, CALET (CALorimetric Electron Telescope) is directly measuring the electron+positron cosmic-ray spectrum up into the TeV-region with fine energy resolution and good proton rejection. The latest published total electron+positron spectrum is analyzed for Dark Matter signatures. Limits on annihilation and decay of Dark Mat ... More Presented by Dr. Holger MOTZ on 30/8/2018 at 15:35 Type: Talk Session: Dark Matter Track: Dark Matter There is a substantial effort in the physics community to search for dark matter interactions with the Standard Model of particle physics. Collisions between dark matter particles and baryons exchange heat and momentum in the early Universe, enabling a search for dark matter interactions using cosmological observations in a parameter space that is highly complementary to that of direct detection. ... More Presented by Dr. Kimberly BODDY on 27/8/2018 at 15:30 Type: Talk Session: Dark Matter Track: Dark Matter The sub-GeV mass region of the dark matter is foreseeably to be explored intensively in the next generation of direct detection experiments. Essig and others [1] recently discussed the feasibility of detecting the dark-matter electron recoil using low-noise semiconductor detectors as the active target. With a readout noise level below one electron RMS, the sensitivity allows us to test several the ... More Presented by Prof. Jochen SCHIECK on 28/8/2018 at 13:15 Type: Talk Session: Dark Matter Track: Dark Matter Recently, the DAMA/LIBRA collaboration released updated results from their search for the annual modulation signal from Dark Matter scattering in the detector. Besides approximately doubling the exposure of the DAMA/LIBRA data set, the updated photomultiplier tubes of the experiment allow to lower the recoil energy threshold to 1 keV electron equivalent from the previous threshold of 2 keV electro ... More Presented by Sebastian BAUM on 28/8/2018 at 12:20 Type: Talk Session: Dark Matter Track: Dark Matter Observations of high-energy gamma rays are one of the most promising tools to constrain or reveal the nature of dark matter. During the remarkable ten years of the Fermi satellite mission, the data from its Large Area Telescope (LAT) were used to set constraints on the dark matter cross section to various particle channels which cut well into the theoretically motivated region of the parameter spa ... More Presented by Gabrijela ZAHARIJAS on 31/8/2018 at 12:00 Type: Talk Session: Dark Matter Track: Dark Matter Indirect searches for dark matter with the ground-based MAGIC telescopes will be reviewed. Different targets with a large expected dark matter content, such as galaxy clusters and dwarf satellite galaxies, allow to constrain dark-matter annihilation/decay processes up to the TeV mass scale. Latest results from deep observations of the galaxy cluster Perseus and the dwarf spheroidal Ursa Major II w ... More Presented by Dr. Monica VAZQUEZ ACOSTA on 27/8/2018 at 12:00 Type: Talk Session: Dark Matter Track: Dark Matter LUX-ZEPLIN (LZ) is a second-generation dark matter experiment currently under construction. It will follow LUX in the 1480-m deep Sanford Underground Research Facility in South Dakota, with a projected sensitivity for the spin-independent cross section of$1.6\times10^{-48}~$cm$^{2}$for a 40 GeV/c$^2$mass Weakly Interacting Massive Particle (WIMP) after 1000 live-days exposure of a 5.6-tonne fid ... More Presented by Dr. Alfredo TOMAS ALQUEZAR on 29/8/2018 at 15:15 Type: Talk Session: Dark Matter Track: Dark Matter We present a radically new version of the widely used DarkSUSY package, which allows to compute the properties of dark matter particles numerically. With DarkSUSY 6 one can accurately predict a large variety of astrophysical signals from dark matter, such as direct detection in low-background counting experiments and indirect detection through antiprotons, antideuterons, gamma-rays and positrons f ... More Presented by Prof. Torsten BRINGMANN on 29/8/2018 at 15:45 Type: Talk Session: Dark Matter Track: Dark Matter The GAPS experiment is designed to carry out a dark matter search by hunting for low-energy cosmic-ray antideuterons with a novel detection approach. So far not a single cosmic antideuteron has been detected by any experiment, but well-motivated theories beyond the standard model of particle physics contain viable dark matter candidates, which could lead to a significant enhancement of the antideu ... More Presented by Dr. Ralph BIRD on 27/8/2018 at 15:45 Type: Talk Session: Dark Matter Track: Dark Matter We propose a new method to search for axion-like particles (ALPs) based on the gamma-rays produced concomitant with high-energy astrophysical neutrinos. The existence of high-energy neutrinos implies production of gamma-rays in the same sources. Photons can convert into ALPs in the sources' magnetic fields, and will travel as ALPs through extragalactic space. Back-conversion in the Milky Way's mag ... More Presented by Dr. Ranjan LAHA on 27/8/2018 at 14:45 Type: Talk Session: Dark Matter Track: Dark Matter Observations at cosmological and astronomical scales indicate that the majority of matter in our Universe is in the form of non-relativistic and long-lived dark matter. Its observed relic abundance is consistent with the existence of a neutral, massive particle with little or no self-interaction. A dark matter candidate favoured by extensions of the Standard Model is a Weakly Interacting Massive P ... More Presented by Mr. Julien WULF on 28/8/2018 at 12:00 Type: Talk Session: Dark Matter Track: Dark Matter The CRESST-III (Cryogenic Rare Event Search with Superconducting Thermometers) experiment, located in the Gran Sasso underground laboratory (LNGS, Italy), aims at the direct detection of dark matter (DM) particles. Scintillating CaWO$_4$crystals operated as cryogenic detectors at mK temperatures are used as target material for elastic DM-nucleus scattering. The simultaneous measurement of the p ... More Presented by Paolo GORLA on 28/8/2018 at 12:40 Type: Talk Session: Dark Matter Track: Dark Matter A key prediction of the standard cosmological model -- which relies on the assumption that dark matter is cold, i.e. non-relativistic at the epoch of structure formation -- is the existence of a large number of dark matter substructures on sub-galactic scales. This assumption can be tested by studying the perturbations induced by dark matter substructures on cold stellar streams. Here, we study th ... More Presented by Dr. Nilanjan BANIK on 30/8/2018 at 14:35 Type: Talk Session: Dark Matter Track: Dark Matter An anomalous, apparently diffuse, gamma-ray signal not readily attributable to known Galactic sources has been found in Fermi space telescope data covering the central ~10 degrees of the Galaxy. This "Galactic Center Gamma-Ray Excess" (GCE) signal has a spectral peak at ~2 GeV and reaches its maximum intensity at the Galactic Centre (GC) from where it falls off as a radial power law ~r^{-2.4}. Giv ... More Presented by Roland CROCKER on 31/8/2018 at 12:20 Type: Talk Session: Dark Matter Track: Dark Matter I will present a well-motivated dark matter scenario that naturally predicts a strong emission of gravitational waves in the Early Universe. Interplay with Higgs physics as well as the corresponding dark matter phenomenology will be discussed. Presented by Dr. Camilo Alfredo GARCIA CELY on 30/8/2018 at 14:50 Type: Talk Session: Dark Matter Track: Dark Matter TeV photons provide unique tests of fundamental physics phenomena, such as dark matter annihilation and decay. The High Altitude Water Cherenkov (HAWC) Observatory is an extensive air shower array sensitive to gamma rays from 500 GeV - 100 TeV. HAWC is capable of performing indirect dark matter searches in a mass range that is inaccessible to most other experiments. The HAWC wide field-of-view ena ... More Presented by Pat HARDING on 27/8/2018 at 12:40 Type: Talk Session: Dark Matter Track: Dark Matter The Large Underground Xenon (LUX) detector was a dual-phase xenon Time Projection Chamber with an active mass of 250 kg searching for Weakly Interacting Massive Particle (WIMP) dark matter via direct detection. It operated at the Sanford Underground Research Facility (SURF) in Lead, South Dakota from 2012 to 2016. LUX has published three previously world leading limits on the spin-independent cros ... More Presented by M. I. LOPES on 29/8/2018 at 14:45 Type: Talk Session: Dark Matter Track: Dark Matter In this talk, we present the latest results on dark matter searches using the High Energy Stereoscopic System (H.E.S.S.) located in Namibia. Dark matter is searched for looking for high-energy gamma-ray events in the most promising regions of the sky. Dark matter particles could self-annihilate and produce high-energy gamma rays, either as spectral lines or as continous spectrum. The inner region ... More Presented by Dr. Vincent POIREAU on 30/8/2018 at 12:20 Type: Talk Session: Dark Matter Track: Dark Matter The origin and observed abundance of Dark Matter can be explained elegantly by the thermal freeze-out mechanism, leading to a preferred mass range for Dark Matter particles in the ~MeV-TeV region. The GeV-TeV mass range is being explored intensively by a variety of experiments searching for Weakly Interacting Massive Particles. The sub-GeV region, however, in which the masses of the building block ... More Presented by Ruth POETTGEN on 27/8/2018 at 15:15 Type: Talk Session: Dark Matter Track: Dark Matter Dwarf spheroidal galaxies are are exceptionally clean targets for searches for gamma rays from dark matter annihilation. Here, I will discuss a general, model-independent formalism for determining bounds on the production of photons from dark matter annihilation in dwarf spheroidal galaxies. This formalism is applicable to any set of assumptions about dark matter particle physics or astrophysics ... More Presented by Pearl SANDICK on 27/8/2018 at 13:15 Type: Talk Session: Dark Matter Track: Dark Matter We study evolution of dark matter substructures, especially how they lose the mass and change density profile after they fall in gravitational potential of larger host halos. We develop an analytical prescription that models the subhalo mass evolution and calibrate it to results of N-body numerical simulations of various scales from very small (Earth size) to large (galaxies to clusters) halos. We ... More Presented by Shin'ichiro ANDO on 27/8/2018 at 14:15 Type: Talk Session: Dark Matter Track: Dark Matter Direct detection experiments that utilise xenon have proven to be most sensitive for heavy (>5 GeV) dark matter particles. In this talk, I'll explore signals that allow xenon experiments to probe the dark matter - nucleon cross section for dark matter particles down to ~100 MeV. These signals arise from electron or photon emission from the xenon atom after a collision with a light dark matter part ... More Presented by Dr. Christopher MCCABE on 29/8/2018 at 14:30 Type: Talk Session: Dark Matter Track: Dark Matter Using tens of telescopes and cutting-edge design, the Cherenkov Telescope Array (CTA) project will probe high and very high-energy gamma rays with two independent installations in both hemispheres. With 5-20 times more sensitivity, depending on the energy, than current instruments such as MAGIC, HESS and VERITAS, as well as improved energy and angular resolutions, CTA will be an outstanding instru ... More Presented by Dr. Michele DORO on 30/8/2018 at 12:40 Type: Talk Session: Dark Matter Track: Dark Matter A precise knowledge of the local dark matter velocity distribution and its uncertainties is necessary for the correct interpretation of dark matter direct detection data. High resolution hydrodynamical simulations of galaxy formation provide important information on the properties of the dark matter halo, and find that baryons generally make the local dark matter velocity distribution of Milky Way ... More Presented by Nassim BOZORGNIA on 28/8/2018 at 13:00 Type: Talk Session: Dark Matter Track: Dark Matter Revealing the nature of dark matter is one of the most riveting open tasks of modern astronomy and cosmology. To this end, observing and analyzing high-energy gamma-rays provides a promising and highly-effective tool to constrain the properties of dark matter particles. Being currently in its pre-construction phase, the Cherenkov Telescope Array (CTA) will soon observe the high-energy gamma-ray s ... More Presented by Mr. Christopher ECKNER on 30/8/2018 at 13:30 Type: Talk Session: Dark Matter Track: Dark Matter Cosmic rays are one important tool to study dark matter annihilation in our Galaxy. Recently, a possible hint for dark matter annihilation was found in the antiproton spectrum measured by AMS-02. The potential signal is affected by many theoretical and systematic uncertainties making its validation or exclusion a non-trivial task. The most direct but complementary way to test the dark matter inter ... More Presented by Mr. Michael KORSMEIER on 30/8/2018 at 15:50 Type: Talk Session: Dark Matter Track: Dark Matter Cherenkov telescopes such as HESS, VERITAS, and CTA, represent one of the most promising avenues to detect popular dark matter candidates like the wino, higgsino, and minimal dark matter. Yet theoretical predictions for the annihilation rate and spectrum of photons produced in such models is a notoriously difficult multi-scale problem, sensitive to the dark matter mass, electroweak scale, and also ... More Presented by Mr. Nicholas RODD on 27/8/2018 at 13:30 Type: Talk Session: Dark Matter Track: Dark Matter Cold dark matter candidates generically lead to the structuring of matter on scales much smaller than typical galaxies. This clustering translates into a very population of subhalos in galaxies, which induces an enhancement of the average annihilation rate with respect to a smooth-halo assumption. Recent work by van den Bosch et al. showed that the number of these objects that survive tidal intera ... More Presented by Mr. Martin STREF on 27/8/2018 at 14:30 Type: Talk Session: Dark Matter Track: Dark Matter The galactic dwarf spheroidal (dSph) galaxies are the promising targets for the dark matter indirect searches for particle dark matter. To place robust constraints on candidate dark matter particles, understanding the dark matter distribution of these systems is of substantial importance. However, various non-negligible systematic uncertainties complicate the estimate of the J-factors relevant f ... More Presented by Dr. Kohei HAYASHI on 27/8/2018 at 13:00 Type: Talk Session: Dark Matter Track: Dark Matter The Milky Way halo is the brightest source of dark matter annihilation on the sky. Indeed, the potential strength of the Galactic dark matter signal can supersede that expected from dwarf galaxies and galaxy groups even in regions away from the Inner Galaxy. We present the results of a search for dark matter annihilation in the smooth Milky Way halo for$|b| > 20^\circ$and$r < 50^\circ\$ using 41 ... More
Presented by Laura CHANG on 30/8/2018 at 13:15
Type: Talk Session: Dark Matter
Track: Dark Matter
In the context of dark matter (DM) searches, it is crucial to quantify and reduce theoretical uncertainties affecting predictions of observables that depend on the DM velocity distribution, including event rates in direct searches, velocity-dependent annihilation rates, and microlensing event rates for DM compact objects. The well-known Eddington inversion formalism for the self-consistent reconst ... More
Presented by Dr. Thomas LACROIX on 29/8/2018 at 15:30
Type: Talk Session: Dark Matter
Track: Dark Matter
The IceCube Neutrino Observatory at the South Pole is the world's largest neutrino telescope in operation. It instruments a kilometer cube of ice with more than 5000 optical sensors that detect the Cherenkov light emitted by particles produced in neutrino-nucleon interactions. Being sensitive to a wide range of neutrino energies, from a few GeV to PeVs, its physics program is extremely rich. Th ... More
Presented by Dr. Carlos DE LOS HEROS on 30/8/2018 at 12:00
Type: Talk Session: Dark Matter
Track: Dark Matter
High energy γ-ray photons emitted by astrophysical sources are absorbed by pair production with the diffuse extragalactic background light (EBL), which results in a decrease of the transparency of the universe to γ rays. Multiple extensions of the Standard Model predict the existence of axion-like particles (ALPs), a new type of pseudoscalar particles that can couple to photons in the presence o ... More
Presented by Mr. Galo GALLARDO ROMERO on 27/8/2018 at 15:00
Type: Talk Session: Dark Matter
Track: Dark Matter
In this talk, I would like to review how the CMB (in particular its temperature and polarization anisotropies) can be used to perform both direct and indirect detection of DM. Firstly, I will show the great complementarity between underground direct detection experiment and the CMB in looking for direct scattering between dark and baryonic matter. I will then discuss how the CMB challenges the ... More
Presented by Dr. Vivian POULIN on 31/8/2018 at 12:40
Type: Poster (A0 portrait) Session: Dark Matter
Track: Dark Matter
Test
Presented by Mr. Maximilian DREYER
Type: Talk Session: Dark Matter
Track: Dark Matter
In the framework of zoom-in cosmological simulations published in Mollitor et al 2015, together with news runs, we compare the phase-space distributions of simulations of Milky Way like Halos with those inferred by the Eddington inversion. This method as presented by Lacroix et al 2018 is able to deduce the phase-space distribution of Dark Matter (DM) at different radii from the mass density d ... More
Presented by Mr. Arturo NUNEZ-CASTINEYRA on 30/8/2018 at 14:20
Type: Talk Session: Dark Matter
Track: Dark Matter
I will review the arguments in favor of either pulsars or annihilating dark matter as the source of the GeV excess observed from the Inner Galaxy. While it is not clear at this time which of these interpretations is correct, I will argue that upcoming observations will likely clarify the situation considerably.
Presented by Prof. Dan HOOPER on 31/8/2018 at 13:00
Type: Talk Session: Dark Matter
Track: Dark Matter
VERITAS is an imaging atmospheric Cherenkov observatory that is sensitive to gamma rays in the energy range between 85 GeV and > 30 TeV. VERITAS observations allow for the study of a wide variety of physics, including energetic environments inside and outside our galaxy, searches for dark matter, and a number of topics in astroparticle physics. We present an update on indirect dark matter searches ... More
Presented by Mr. Nathan KELLEY-HOSKINS on 27/8/2018 at 12:20
Type: Talk Session: Dark Matter
Track: Dark Matter
Recent analyses of the diffuse TeV-PeV neutrino flux highlight a tension between different IceCube data samples that strongly suggests a two-component scenario rather than a single steep power-law. In this talk, I show how such a tension is further strengthened once the latest ANTARES (9-year) and IceCube (6-year) data are combined together. Remarkably, both experiments show an excess in the same ... More
Presented by Dr. Marco CHIANESE on 31/8/2018 at 13:15
Type: Talk Session: Dark Matter
Track: Dark Matter
We perform a search of Dark Matter (DM) subhalo candidates among unassociated catalogued sources present in the most recent Fermi-LAT point-source catalogs (3FGL, 2FHL and 3FHL). These LCDM-predicted DM subhalos are promising candidates for gamma-ray emission from WIMP annihilation in the LAT energy band. Several selection criteria are applied, based on the expected properties of the DM-induced em ... More
Presented by Mr. Javier CORONADO-BLÁZQUEZ on 30/8/2018 at 13:00
Type: Talk Session: Dark Matter
Track: Dark Matter
The EDELWEISS collaboration is performing a direct search for WIMP dark matter in the mass range from 1 to 20 GeV/c2 using cryogenic germanium detectors equipped with a full charge and thermal signal readout. We present the most recent results and the currently ongoing program to reduce the experimental thresholds in order to gain sensitivity for low mass WIMPs. This comprises utilizing the Negano ... More
Presented by Dr. Klaus EITEL on 29/8/2018 at 14:15
Type: Talk Session: Dark Matter
Track: Dark Matter
I will demonstrate how current and future measurements of the global 21-cm signal could provide new constraints on models of p-wave annihilating dark matter (DM), over a broad range of DM masses. 21-cm observations are sensitive to the baryon temperature at the end of the cosmic dark ages, and are particularly well-suited to constrain p-wave models, because the energy injection rate from p-wave an ... More
Presented by Gregory RIDGWAY on 31/8/2018 at 13:30
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