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SUMMARY:MADMAX: A QCD Dark Matter Axion Direct-Detection Experiment
DTSTART;VALUE=DATE-TIME:20210831T154500Z
DTEND;VALUE=DATE-TIME:20210831T160000Z
DTSTAMP;VALUE=DATE-TIME:20260611T044610Z
UID:indico-contribution-2312-15889@indico.ific.uv.es
DESCRIPTION:Speakers: Chang Lee (MPI for Physics)\nAxions emerge naturally
  from the Peccei-Quinn (PQ) mechanism which addresses the absence of CP vi
 olation in the strong interaction\, and they can make up the cold dark mat
 ter in the universe. If PQ symmetry breaking had occurred after inflation\
 , the axion mass would likely range from ∼ 40 μeV to ∼ 1 meV\, w
 hich is yet to be explored experimentally.\n\nThe MAgnetized Disc And Mirr
 or Axion eXperiment is designed to reach sensitivity in the axion mass ran
 ge of 40 to 400 µeV\, a range inaccessible by previous axion experiments.
  This is reached by applying the dielectric haloscope approach\, exploitin
 g the axion to photon conversion at dielectric surfaces within a strong ma
 gnetic field. For MADMAX a system of  movable dielectric discs  inside a
 n approximately 9 T magnetic field is foreseen.\n\nThe design\, realizatio
 n and timescale of MADMAX will be discussed along with prospects of the MA
 DMAX prototype as well as first proofs of concept guiding the way towards 
 the final experiment and the first physics run.\n\nhttps://indico.ific.uv.
 es/event/6178/contributions/15889/
LOCATION:
URL:https://indico.ific.uv.es/event/6178/contributions/15889/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Constraining the diffuse supernova axion-like-particle background 
 with high-latitude Fermi-LAT data
DTSTART;VALUE=DATE-TIME:20210831T154500Z
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UID:indico-contribution-2312-15888@indico.ific.uv.es
DESCRIPTION:Speakers: Christopher Eckner (CNRS/LAPTh)\nCore-collapse super
 novae (SNe) have been identified as a promising target to probe the existe
 nce of axion-like-particles (ALPs). The cumulative signal from all past SN
 e events would contain an ALP component and create a diffuse flux with ene
 rgies $\\mathcal{O}(50)$ MeV. We update the calculation of this flux by in
 cluding SNe with different masses following the expected mass distribution
 \, instead of using the spectrum obtained by using a single reference mass
 . Due to their coupling to photons and the related Primakoff process\, the
  diffuse SNe ALP flux is converted into a diffuse gamma-ray flux while tra
 versing the magnetic field of the Milky Way. The spatial morphology of thi
 s signal is expected to follow the shape of the Galactic magnetic field li
 nes.\nWe perform a template-based analysis to constrain the ALP parameter 
 space via the spatial structure of this ALP-induced diffuse gamma-ray flux
  using Fermi-LAT data from 12 years and an energy range from 50 MeV to 500
  GeV. We find an improvement of the upper limit on the ALP-photon coupling
  constant $g_{a\\gamma}$ about an order of magnitude compared to a previou
 s analysis solely based on the spectral shape of the signal. Our results a
 re robust against variations in the modelling of high-latitude Galactic di
 ffuse emission and systematic uncertainties of the LAT.\n\nhttps://indico.
 ific.uv.es/event/6178/contributions/15888/
LOCATION:
URL:https://indico.ific.uv.es/event/6178/contributions/15888/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Ultralight dark matter searches with KAGRA gravitational wave tele
 scope
DTSTART;VALUE=DATE-TIME:20210831T154500Z
DTEND;VALUE=DATE-TIME:20210831T160000Z
DTSTAMP;VALUE=DATE-TIME:20260611T044610Z
UID:indico-contribution-2312-15882@indico.ific.uv.es
DESCRIPTION:Speakers: Yuta Michimura (Department of Physics\, University o
 f Tokyo)\nAmong various dark matter candidates\, bosonic ultralight fields
  with masses below 1 eV are well motivated by cosmology because they behav
 e as classical wave fields\, rather than individual particles. Recently\, 
 a number of novel ideas have been proposed to search for ultralight dark m
 atter candidates using laser interferometers at various scales. Those incl
 ude our proposals to search for axion-like particles (ALPs) and vector fie
 lds with laser interferometric gravitational wave detectors. ALPs can be s
 earched for by measuring the oscillating polarization rotation of laser be
 am. Massive vector field weakly coupled to the standard model sector can a
 lso be searched for by measuring the oscillating forces acting on the susp
 ended mirrors of the interferometers. Within the KAGRA collaboration\, the
  analysis of data from the KAGRA's observing run in 2020 to search for vec
 tor dark matter\, and the installation of polarization optics to the arm c
 avity transmission ports of the interferometer to search for ALPs are unde
 rway. In this talk\, we will report the status of such efforts to search f
 or ultralight dark matter with KAGRA gravitational wave telescope.\n\nhttp
 s://indico.ific.uv.es/event/6178/contributions/15882/
LOCATION:
URL:https://indico.ific.uv.es/event/6178/contributions/15882/
END:VEVENT
BEGIN:VEVENT
SUMMARY:A Novel Search Technique for Ultralight Dark Matter Using Green Ba
 nk Telescope Data
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UID:indico-contribution-2312-15880@indico.ific.uv.es
DESCRIPTION:Speakers: Aya Keller (UC Berkeley)\nMost of the matter in the 
 universe is widely thought to be non-baryonic and composed of unknown suba
 tomic particles referred to as dark matter. While significant attention ha
 s been paid to a few specific candidates such as the WIMP and axion\, in f
 act the nature and mass of dark matter is poorly constrained\, and thus a 
 broad observational approach may yield useful clues for its ultimate detec
 tion. We have developed a novel approach which utilizes the recent Breakth
 rough Listen public data release of three years of observation with the Gr
 een Bank Telescope to execute a broad search for an axion signal across bi
 llions of independent frequency channels simultaneously. This method is mo
 del-independent and only assumes that there is a decay or annihilation of 
 virialized dark matter leading to a quasi-monochromatic radio line\, and a
 dditionally that the line exhibits a Doppler shift with position according
  to the solar motion through a static galactic halo. This approach has bee
 n tested on a subset of L-band data\, and the analysis of the full L-\, S-
 \, C- and X-band dataset (25\,000 spectra\, 1.1–11.6 GHz) is currently u
 nderway. This work was supported by a grant from the Heising-Simons Founda
 tion.\n\nhttps://indico.ific.uv.es/event/6178/contributions/15880/
LOCATION:
URL:https://indico.ific.uv.es/event/6178/contributions/15880/
END:VEVENT
BEGIN:VEVENT
SUMMARY:First observation and analysis of DANCE: Dark matter Axion search 
 with riNg Cavity Experiment
DTSTART;VALUE=DATE-TIME:20210831T154500Z
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DTSTAMP;VALUE=DATE-TIME:20260611T044610Z
UID:indico-contribution-2312-15865@indico.ific.uv.es
DESCRIPTION:Speakers: Yuka Oshima (Department of Physics\, University of T
 okyo)\nDark matter Axion search with riNg Cavity Experiment (DANCE) was pr
 oposed. To search for axion-like dark matter\, we aim to detect the rotati
 on and oscillation of optical linear polarization caused by axion-photon c
 oupling with a bow-tie ring cavity. DANCE can improve the sensitivity to t
 he axion-photon coupling constant for axion mass $\n\nhttps://indico.ific.
 uv.es/event/6178/contributions/15865/
LOCATION:
URL:https://indico.ific.uv.es/event/6178/contributions/15865/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Using cryogenic Penning trap LC detection circuits to search for a
 xion-like dark matter.
DTSTART;VALUE=DATE-TIME:20210831T154500Z
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UID:indico-contribution-2312-15848@indico.ific.uv.es
DESCRIPTION:Speakers: Jack Devlin (CERN)\nWe present recent limits set by 
 the BASE collaboration on the coupling between any dark matter axion-like 
 particles (ALPs) and photons\, measured using the superconducting resonant
  single particle detection circuit of a cryogenic Penning trap. To search 
 for ALPs\, we investigated the noise spectrum of our fixed-frequency reson
 ant circuit for peaks caused by axion-to-photon conversion in the strong m
 agnetic field of the Penning trap magnet. Uniquely\, we used a single anti
 proton interacting with our detection circuit to measure the detector nois
 e temperature. Our analysis constrained the coupling of ALPs with masses a
 round 2.7906-2.7914 neV/c$^{2}$ to photons to be $g_{a\\gamma}2000 times b
 roader mass range at improved sensitivity.\n\nhttps://indico.ific.uv.es/ev
 ent/6178/contributions/15848/
LOCATION:
URL:https://indico.ific.uv.es/event/6178/contributions/15848/
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BEGIN:VEVENT
SUMMARY:Beyond the Standard Model Searches with the MAJORANA DEMONSTRATOR 
 Experiment
DTSTART;VALUE=DATE-TIME:20210831T154500Z
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DTSTAMP;VALUE=DATE-TIME:20260611T044610Z
UID:indico-contribution-2312-15827@indico.ific.uv.es
DESCRIPTION:Speakers: Wenqin Xu (University of South Dakota)\nThe MAJORANA
  DEMONSTRATOR experiment operated two modular arrays of p-type point conta
 ct high purity germanium (HPGe) detectors\, of which 30 kg is enriched to 
 88% in Ge-76\, to search for neutrinoless double beta decay. The data-taki
 ng campaign for double beta decay with enriched detectors was successfully
  concluded in March 2021\, and data-taking with natural detectors is still
  ongoing. The DEMONSTRATOR has achieved excellent energy performance in a 
 wide dynamic range covering 1 keV to 10 MeV. The extra-low background leve
 l and excellent energy performance achieved by the DEMONSTRATOR makes it c
 ompetitive in various searches of physics beyond the Standard Model. \n\nI
 f there is an axion-photon coupling\, axions can be produced by the Primak
 off conversion of photons in the Sun. Solar axions can inversely generate 
 photon signals in germanium crystals\, which can be coherently enhanced wh
 en the Bragg condition is satisfied. The DEMONSTRATOR is searching for sol
 ar axions with a novel method to correlate and leverage its high number of
  HPGe detectors. In this talk\, we will discuss the status and results of 
 recent searches for new physics with the DEMONSTRATOR\, including the firs
 t reporting of a solar axion search.\n\nhttps://indico.ific.uv.es/event/61
 78/contributions/15827/
LOCATION:
URL:https://indico.ific.uv.es/event/6178/contributions/15827/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Searching For Axion Dark Matter with the South Pole Telescope
DTSTART;VALUE=DATE-TIME:20210831T154500Z
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DTSTAMP;VALUE=DATE-TIME:20260611T044610Z
UID:indico-contribution-2312-15801@indico.ific.uv.es
DESCRIPTION:Speakers: Kyle Ferguson (UCLA)\nAxions and other axion-like pa
 rticles (ALPs) remain compelling dark matter candidates with a wealth of p
 ossible detection methods.  A photon traveling through an axion field will
  experience a rotation in its polarization proportional to the difference 
 in axion field value at photon emission and photon absorption.  Thus the a
 pparent polarization of a static astrophysical source will oscillate in ti
 me as the local axion dark matter field oscillates (with a frequency propo
 rtional to the axion mass).  The cosmic microwave background (CMB) is pola
 rized\, well-studied\, and extremely static\, making it an ideal source wi
 th which to search for this effect.  We present the status of such a searc
 h for ultra-light ALPs with masses roughly between $10^{-21}$ and $10^{-19
 }$ eV using data from the South Pole Telescope (SPT)\, a millimeter-band t
 elescope with arcminute resolution that is located at the geographic South
  Pole and designed to observe the CMB.\n\nhttps://indico.ific.uv.es/event/
 6178/contributions/15801/
LOCATION:
URL:https://indico.ific.uv.es/event/6178/contributions/15801/
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BEGIN:VEVENT
SUMMARY:Constraints on Axion-like Particles from a Hard X-ray Observation 
 of Betelgeuse
DTSTART;VALUE=DATE-TIME:20210831T154000Z
DTEND;VALUE=DATE-TIME:20210831T155500Z
DTSTAMP;VALUE=DATE-TIME:20260611T044610Z
UID:indico-contribution-2312-15793@indico.ific.uv.es
DESCRIPTION:Speakers: Mengjiao Xiao (MIT)\nAxion-like particles (ALPs) can
  be produced in stellar plasmas via the Primakoff process due to the photo
 n-ALP coupling. Light ALPs produced in this way can easily escape the star
  and reconvert back into photons in the Galactic magnetic field. Betelgeus
 e (α-Orionis\, spectral type M2Iab)\, a nearby red supergiant star\, prov
 ides an excellent laboratory for ALP searches\, as it (i) has a hot core\,
  and thus is potentially a copious producer of ALPs that\, after re-conver
 sion\, produces a photon signal peaked in the hard X-ray (E>10 keV) range\
 , (ii) is in region of Hertzsprung-Russel diagram where no stable corona i
 s expected\, and thus has essentially zero standard astrophysical X-ray ba
 ckground\, and (iii) is nearby\, at a distance d~200 pc\, and thus in a re
 gion of the local magnetic field that is relatively easier to constrain wi
 th future observations.\nWe use the first observation of Betelgeuse in har
 d X-rays to perform a novel search for ALPs. With a 50 ks observation by t
 he NuSTAR satellite telescope\, we find no significant excess of events ab
 ove the expected background and set a stringent upper limit on the ALP-pho
 ton coupling. In this contribution\, I will detail this work while focusin
 g on the data analysis\, results and impact\, and emphasizing the uncertai
 nty introduced by the stellar evolution model and the Galactic magnetic fi
 eld.\n\nhttps://indico.ific.uv.es/event/6178/contributions/15793/
LOCATION:
URL:https://indico.ific.uv.es/event/6178/contributions/15793/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Axion-Photon Conversion in Magnetospheres: The Role of the Plasma
DTSTART;VALUE=DATE-TIME:20210831T152500Z
DTEND;VALUE=DATE-TIME:20210831T154000Z
DTSTAMP;VALUE=DATE-TIME:20260611T044610Z
UID:indico-contribution-2312-15789@indico.ific.uv.es
DESCRIPTION:Speakers: Samuel Witte (GRAPPA Institute\, Univ Amsterdam)\nTh
 e most promising indirect search for the existence of axion dark matter us
 es radio telescopes to look for narrow spectral lines generated in the mag
 netospheres of neutron stars. Unfortunately\, a large list of theoretical 
 uncertainties has prevented this search strategy from being accepted as ro
 bust. In this talk I will present a novel end-to-end pipeline that traces 
 individual photon trajectories from their point of genesis in the magnetos
 phere to asymptotic distances. This method allows one assess many of the o
 utstanding uncertainties\, including: (1) do refraction and reflection ind
 uce strong inhomogeneous features in the flux\, (2) can refraction induce 
 premature axion-photon de-phasing\, (3) what is the expected width of the 
 line\, (4) does the flux have a strong time-dependence\, and (5) can these
  radio photons be efficiently absorbed.\n\nhttps://indico.ific.uv.es/event
 /6178/contributions/15789/
LOCATION:
URL:https://indico.ific.uv.es/event/6178/contributions/15789/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Axion Quasiparticles for Axion Dark Matter Detection
DTSTART;VALUE=DATE-TIME:20210831T151000Z
DTEND;VALUE=DATE-TIME:20210831T152500Z
DTSTAMP;VALUE=DATE-TIME:20260611T044610Z
UID:indico-contribution-2312-15787@indico.ific.uv.es
DESCRIPTION:Speakers: Jan Schütte-Engel (University of Illinois Urbana-Ch
 ampaign)\nIt has been suggested that certain antiferromagnetic topological
  insulators contain axion quasiparticles (AQs)\, and that such materials c
 ould be used to detect axion dark matter (DM). In the first part of this t
 alk we show that one can detect AQs with transmission spectroscopy. The tr
 ansmission coefficients including material losses are computed by applying
  appropriate boundary conditions. We show that by comparing our signal cal
 culation to future THz transmission experiments the existence of AQs can b
 e proven. Furthermore\, the comparison can be used to fully characterize t
 he material parameters.\nIn the second part of this talk we show that AQs 
 can be used for axion DM detection. The dispersion relation and boundary c
 onditions permit resonant conversion of axion DM into THz photons. The res
 onance frequency is tunable with an external B-field. A parameter study fo
 r axion DM detection is performed\, computing boost amplitudes and bandwid
 ths using realistic material properties including loss. The proposal could
  allow for detection of axion DM in the mass range between 1 and 10 meV us
 ing current and near future technology.\n\nhttps://indico.ific.uv.es/event
 /6178/contributions/15787/
LOCATION:
URL:https://indico.ific.uv.es/event/6178/contributions/15787/
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