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SUMMARY:Neutrino and Axion Astronomy with Dark Matter Experiments
DTSTART;VALUE=DATE-TIME:20210830T154500Z
DTEND;VALUE=DATE-TIME:20210830T160000Z
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UID:indico-contribution-2310-15910@indico.ific.uv.es
DESCRIPTION:Speakers: Volodymyr Takhistov (Kavli IPMU\, U. Tokyo)\nBeyond 
 their unprecedented sensitivity to dark matter (DM)\, as I will demonstrat
 e\, large direct detection experiments constitute impressive neutrino tele
 scopes. This opens a new window into astronomy\, leading to possible insig
 hts into major problems such as the origin of supermassive black holes. Fu
 rthermore\, DM experiments can be exploited as novel tools in multi-messen
 ger astronomy for exploration of new physics. I will discuss detection of 
 relativistic axions from transient astrophysical sources (e.g. axion star 
 explosions)\, which can lead to new insights into the fundamental axion po
 tential.\n\nhttps://indico.ific.uv.es/event/6178/contributions/15910/
LOCATION:
URL:https://indico.ific.uv.es/event/6178/contributions/15910/
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SUMMARY:Radio-frequency Dark Photon Dark Matter across the Sun
DTSTART;VALUE=DATE-TIME:20210830T154500Z
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UID:indico-contribution-2310-15906@indico.ific.uv.es
DESCRIPTION:Speakers: Jia Liu (Peking University)\nDark photon as an ultra
 light dark matter candidate can interact with the Standard Model particles
  via kinetic mixing. We propose to search for the ultralight dark photon d
 ark matter using radio telescopes with solar observations. The dark photon
  dark matter can efficiently convert into photons in the outermost region 
 of the solar atmosphere\, the solar corona\, where the plasma mass of phot
 ons is close to the dark photon rest mass. Due to the strong resonant conv
 ersion and benefiting from the short distance between the Sun and the Eart
 h\, the radio telescopes can lead the dark photon search sensitivity in th
 e mass range of $4 \\times 10^{-8} -  4\\times 10^{-6} \\\, \\rm{eV}$\, co
 rresponding to the frequency $10 - 1000 \\\, {\\rm MHz}$. As a promising e
 xample\, the operating radio telescope LOFAR can reach the kinetic mixing 
 $\\epsilon \\sim  10^{-13}$  ($10^{-14}$) within 1 (100) hour solar observ
 ations. The future experiment SKA phase 1 can reach $\\epsilon \\sim  10^{
 -16} - 10^{-14}$ with $1$ hour solar observations.\n\nhttps://indico.ific.
 uv.es/event/6178/contributions/15906/
LOCATION:
URL:https://indico.ific.uv.es/event/6178/contributions/15906/
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SUMMARY:Stellar Shocks from Dark Matter
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UID:indico-contribution-2310-15903@indico.ific.uv.es
DESCRIPTION:Speakers: Anirban Das (SLAC National Accelerator Laboratory)\n
 Macroscopic dark matter is almost unconstrained over a wide ``asteroid-lik
 e'' mass range\, where it could scatter on baryonic matter with geometric 
 cross section. When such an object travels through a star\, it produces sh
 ock waves which reach the stellar surface\, leading to a distinctive trans
 ient optical\, UV and X-ray emission. I shall talk about how this signatur
 e can be searched for on a variety of stellar types and locations. In a de
 nse globular cluster\, such events occur far more often than flare backgro
 unds. Existing UV telescopes\, like Hubble\, could probe orders of magnitu
 de in dark matter mass in one week of dedicated observation.\n\nhttps://in
 dico.ific.uv.es/event/6178/contributions/15903/
LOCATION:
URL:https://indico.ific.uv.es/event/6178/contributions/15903/
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SUMMARY:Searching for a Dark Matter with the PADME experiment
DTSTART;VALUE=DATE-TIME:20210830T154500Z
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UID:indico-contribution-2310-15835@indico.ific.uv.es
DESCRIPTION:Speakers: Isabella Oceano (Salento U. and INFN\, Lecce)\nThe e
 vidence for the existence of dark matter\, so far is based on its gravitat
 ional effects. Nevertheless\, many theoretical models assume other non-gra
 vitational very-weak interactions between dark matter and ordinary matter\
 , and to test this hypothesis\, different experiments are trying to direct
 ly detect dark matter signals at particle accelerators. \nPADME (Positron 
 Annihilation into Dark Matter Experiment) is peculiar since is searching f
 or dark matter candidates\, and in particular a dark photon\, in the produ
 cts of the annihilation of a positron beam with the electrons of an active
  target. This technique only requires that the dark photon couples to the 
 ordinary one allowing to investigate its existence independently from its 
 decay modes.\nThe experiment was build and commissioned at the Laboratori 
 Nazionali di Frascati of INFN at the end of 2018 beginning of 2019\, and c
 ollected in 2020 $\\sim$ 5×10$^{12}$ positrons on target at 430 MeV.\nThe
  dark photon signal is searched by studying the missing-mass spectrum of s
 ingle-photon final states resulting from the annihilation process. PADME i
 s expected to reach a sensitivity up to $10^{-6}$ in $\\epsilon^2$ (kineti
 c mixing coefficient) for low-mass dark photons ($\\sim$ 20.MeV). Here we 
 present the performance of the detector and the preliminary results of the
  ongoing analyses on SM final states: $\\gamma \\gamma$-events and positro
 n Bremsstrahlung. Prospects for sensitivity to different dark sector candi
 dates\, ALPs and dark Higgs\, will be also given.\n\nhttps://indico.ific.u
 v.es/event/6178/contributions/15835/
LOCATION:
URL:https://indico.ific.uv.es/event/6178/contributions/15835/
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BEGIN:VEVENT
SUMMARY:Studying QCD modeling of uncertainties in particle spectra from da
 rk-matter annihilation into jets
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UID:indico-contribution-2310-15833@indico.ific.uv.es
DESCRIPTION:Speakers: Adil Jueid (Konkuk University)\nMotivated by various
  excesses observed by Fermi-LAT and AMS\, we perform a detailed analysis o
 f QCD uncertainties on particle spectra from dark-matter annihilation (or 
 decay) into jets. When annihilated to SM particles\, the final-state produ
 cts undergo various complicated processes such as QED and QCD bremsstrahlu
 ng\, hadronization\, and hadron decays. These processes contain some intri
 nsic uncertainties which are usually difficult to model and which are negl
 ected in physical analyses. First\, we perform several re-tunings of the f
 ragmentation function parameters. Then\, we estimate two kinds of uncertai
 nties: *(i)* perturbative from QCD showers and *(ii)* non-perturbative fro
 m hadronization function. The results are tabulated for a wide range of da
 rk matter masses and annihilation channels. They can be found on Zenodo\; 
 https://doi.org/10.5281/zenodo.3764809\n\nhttps://indico.ific.uv.es/event/
 6178/contributions/15833/
LOCATION:
URL:https://indico.ific.uv.es/event/6178/contributions/15833/
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SUMMARY:Signatures of Primordial Black Holes in theories of Large Extra Di
 mensions
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UID:indico-contribution-2310-15826@indico.ific.uv.es
DESCRIPTION:Speakers: Avi Friedlander (Queen's University)\nThe addition o
 f spatial dimensions compactified to submillimeter scales serves as an ele
 gant solution to the hierarchy problem. As a consequence of the extra-dime
 nsional theory\, primordial black holes can be created by high-energy part
 icle interactions in the early universe. While four-dimensional primordial
  black holes have been extensively studied\, they have received little att
 ention in the context of extra-dimensions. We adapt and extend previous an
 alyses of four-dimensional primordial black holes for the purpose of study
 ing the impact extra-dimensions have on cosmology. We find new constraints
  on both extra-dimensional primordial black holes\, and the fundamental ex
 tra-dimensional theories by combining an analysis of Big Bang Nucleosynthe
 sis\, the Cosmic Microwave Background\, the Cosmic X-ray Background\, and 
 the galactic centre gamma-rays. With these constraints we explore to what 
 extent these extra-dimensional primordial black holes can comprise the dar
 k matter in our universe.\n\nhttps://indico.ific.uv.es/event/6178/contribu
 tions/15826/
LOCATION:
URL:https://indico.ific.uv.es/event/6178/contributions/15826/
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SUMMARY:Signatures of primordial black hole dark matter at DUNE and THEIA
DTSTART;VALUE=DATE-TIME:20210830T154500Z
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UID:indico-contribution-2310-15812@indico.ific.uv.es
DESCRIPTION:Speakers: Valentina De Romeri (IFIC (CSIC-Univ Valencia))\nPri
 mordial black holes (PBHs) are a potential dark matter candidate whose mas
 ses can span over many orders of magnitude. If they have masses in the 10^
 15 − 10^17 g range\, they can emit sizeable fluxes of MeV neutrinos thro
 ugh evaporation via Hawking radiation. We explore the possibility of detec
 ting light (non-)rotating PBHs with future neutrino experiments DUNE and T
 HEIA. We will show that they will be able to set competitive constraints o
 n PBH dark matter\, thus providing complementary probes in a part of the P
 BH parameter space currently constrained mainly by photon data.\n\nhttps:/
 /indico.ific.uv.es/event/6178/contributions/15812/
LOCATION:
URL:https://indico.ific.uv.es/event/6178/contributions/15812/
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SUMMARY:Low Mass Black Holes from Dark Core Collapse
DTSTART;VALUE=DATE-TIME:20210830T154500Z
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UID:indico-contribution-2310-15809@indico.ific.uv.es
DESCRIPTION:Speakers: Ranjan Laha (Indian Institute of Science\, Bengaluru
 \, India)\nUnusual masses of black holes being discovered by gravitational
  wave experiments pose fundamental questions about the origin of these bla
 ck holes. Black holes with masses smaller than the Chandrasekhar limit $\\
 approx$ 1.4  M$_\\odot$ are essentially impossible to produce through 
 stellar evolution. We propose a new channel for production of low mass bla
 ck holes: stellar objects catastrophically accrete nonannihilating dark ma
 tter\, and the small dark core subsequently collapses\, eating up the host
  star and transmuting it into a black hole. The wide range of allowed dark
  matter masses allows a smaller effective Chandrasekhar limit and thus sma
 ller mass black holes. We point out several avenues to test our proposal\,
  focusing on the redshift dependence of the merger rate. We show that reds
 hift dependence of the merger rate can be used as a probe of the transmute
 d origin of low mass black holes.\n\nhttps://indico.ific.uv.es/event/6178/
 contributions/15809/
LOCATION:
URL:https://indico.ific.uv.es/event/6178/contributions/15809/
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SUMMARY:The Earth as a transducer for dark-photon dark-matter detection
DTSTART;VALUE=DATE-TIME:20210830T154000Z
DTEND;VALUE=DATE-TIME:20210830T155500Z
DTSTAMP;VALUE=DATE-TIME:20260916T181820Z
UID:indico-contribution-2310-15802@indico.ific.uv.es
DESCRIPTION:Speakers: Saarik Kalia (Stanford University)\nIn this talk\, I
  will propose the use of the Earth as a transducer for ultralight dark-mat
 ter detection.  In particular I will point out a novel signal of kinetical
 ly mixed dark-photon dark matter: a monochromatic oscillating magnetic fie
 ld generated at the surface of the Earth.  Similar to the signal in a labo
 ratory experiment in a shielded box (or cavity)\, this signal arises becau
 se the lower atmosphere is a low-conductivity air gap sandwiched between t
 he highly conductive interior of the Earth below and ionosphere or interpl
 anetary medium above.  At low masses (frequencies) the signal in a laborat
 ory detector is usually suppressed by the size of the detector multiplied 
 by the dark-matter mass.  Crucially\, in our case the suppression is by th
 e radius of the Earth\, and not by the (much smaller) height of the atmosp
 here.  The magnetic field signal exhibits a global vectorial pattern that 
 is spatially coherent across the Earth\, which enables sensitive searches 
 for this signal using unshielded magnetometers dispersed over the surface 
 of the Earth.  I will summarize the results of such a search using a publi
 cly available dataset from the SuperMAG collaboration.  The constraints fr
 om this search are complementary to existing astrophysical bounds.  Future
  searches for this signal may improve the sensitivity over a wide range of
  ultralight dark-matter candidates and masses.\n\nhttps://indico.ific.uv.e
 s/event/6178/contributions/15802/
LOCATION:
URL:https://indico.ific.uv.es/event/6178/contributions/15802/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Probing light dark matter particles with astrophysical experiments
DTSTART;VALUE=DATE-TIME:20210830T151000Z
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UID:indico-contribution-2310-15796@indico.ific.uv.es
DESCRIPTION:Speakers: Tanmay Kumar Poddar (Physical Research Laboratory)\n
 Strong bounds from direct detection experiment put stringent limit on the 
 dark matter mass which forces us to go beyond WIMP model of dark matter. I
 n recent years the light mass dark matter particles gain lots of attention
  among the particle physicists. In this talk I will discuss about light ga
 uge bosons motivated from U(1) extension of standard model and axions whic
 h can be a possible dark matter candidates and its detection in several as
 trophysical experiments.\n\nhttps://indico.ific.uv.es/event/6178/contribut
 ions/15796/
LOCATION:
URL:https://indico.ific.uv.es/event/6178/contributions/15796/
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