Conveners
Dark matter, Astroparticle, Gravitational waves
- Kimiko Yamashita (Ibaraki University)
Dark matter, Astroparticle, Gravitational waves
- Nuria Castello-Mor (Universidad de Cantabria, CSIC, Instituto de Fisica de Cantabria IFCA, (ES))
Dark matter, Astroparticle, Gravitational waves
- Nicholas Rodd (Lawrence Berkeley National Laboratory)
Dark matter, Astroparticle, Gravitational waves
- Nicholas Rodd
Dark matter, Astroparticle, Gravitational waves
- Maria Martinez (Universidad de Zaragoza (ES))
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Lorenzo Principe (SUBATECH & University of Melbourne)19/08/2025, 14:00Dark matter, Astroparticle, Gravitational waves
XENONnT, located at the Laboratori Nazionali del Gran Sasso (LNGS) in Italy, is a direct dark matter detection experiment designed to search primarily for Weakly Interacting Massive Particles (WIMPs) using a dual-phase xenon Time Projection Chamber (TPC). Thanks to its ultra-low background environment, the XENONnT detector is also sensitive to a variety of other rare-event physics...
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Maria Martinez19/08/2025, 14:20Dark matter, Astroparticle, Gravitational waves
For over two decades, the DAMA/LIBRA experiment has reported an annual modulation in the low-energy region, consistent with the expectation from dark matter (DM) in the galactic halo due to Earth's motion around the Sun. For most WIMP candidates, this result is excluded by the null results of other experiments, making it one of the most puzzling anomalies in the field. However, such...
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Massimo Carpinelli (Dipartimento di Fisica), Massimo Carpinelli (University of Milano Bicocca and INFN)19/08/2025, 14:40Dark matter, Astroparticle, Gravitational waves
We present the most recent $BABAR$ searches for reactions that could simultaneously explain the presence of dark matter and the matter-antimatter asymmetry in the Universe. This scenario predicts exotic $B$-meson decays of the kind $B\to\psi_{D} {\cal B}$, where $\cal{B}$ is an ordinary matter baryon (proton, $\Lambda$, or $\Lambda_c$) and $\psi_D$ is a dark-sector anti-baryon, with branching...
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Leonardo Favilla (Scuola Superiore Meridionale & INFN - Sezione di Napoli (IT))19/08/2025, 15:00Dark matter, Astroparticle, Gravitational waves
Determination of the nature of dark matter is one of the most fundamental problems of particle physics and cosmology. This talk presents recent searches for dark matter particles from the CMS experiment at the Large Hadron Collider.
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Tamas Almos Vami (Univ. of California Santa Barbara (US))19/08/2025, 15:20Dark matter, Astroparticle, Gravitational waves
Among the intriguing scenarios of new physics that provide explanation to several shortcomings of the Standard Model (SM), hidden valley scenarios include a Dark Sector that extends the SM with a non-Abelian gauge group, similar to quantum chromodynamics with new matter and gauge fields analogous to the SM quark and gluon fields. This may result in a rich phenomenology which we can access...
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Roland Allen19/08/2025, 15:40Dark matter, Astroparticle, Gravitational waves
We report the following calculations for a recently proposed bosonic dark matter WIMP with well-defined interactions [1-4]: (1) the mass as determined by fitting to the relic abundance; (2) the current annihilation cross-section for indirect detection; (3) cross-sections for pair production accompanied by jets in proton colliders with center-of-mass energies ranging from 13 to 100 TeV; (4) for...
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Pouya Asadi, Pouya Asadi (University of Oregon)19/08/2025, 16:30Dark matter, Astroparticle, Gravitational waves
We introduce a new mechanism for the simultaneous generation of baryon and dark matter asymmetries through ultraviolet-dominated freeze-in scatterings. The mechanism relies on heavy Majorana neutrinos that connect the visible Standard Model sector to a dark sector through the neutrino portal. Following reheating of the visible sector to a temperature well below the heavy neutrino masses, we...
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Prof. Kimiko Yamashita (Ibaraki University)19/08/2025, 16:50Dark matter, Astroparticle, Gravitational waves
We introduce the spin-1 $U(1)_X$ gauged field $X$ with $Z_2$ odd dark parity to evade the current strong constraints on kinetic mixing. Then, $X$ becomes stable and a candidate for the dark matter. The lowest mass dimension of interaction is six, and the type is the Higgs portal. Two types of dim-$6$ operators are introduced. We consider the freeze-out dark matter scenario. With the limit of...
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Pankaj Munbodh (University of California Santa Cruz)19/08/2025, 17:10Dark matter, Astroparticle, Gravitational waves
In recent years attention has shifted to probes of sub-GeV dark matter. In this work, we explore the direct detection prospects through single/multiphonon production for dark matter in the keV-GeV mass range, which couples effectively to protons/neutrons via spin-dependent interactions. In particular, we consider coupling the SM to the dark matter through a pseudo scalar, scalar or pseudo...
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Ben Lillard (University of Oregon)19/08/2025, 17:30Dark matter, Astroparticle, Gravitational waves
Molecular crystals are apparently ideal candidates for the next generation of dark matter (DM) detectors. Their anisotropic responses to DM scattering allow the DM signal to be distinguished from the irreducible backgrounds, e.g. by searching for a sidereal daily modulation signal in a detector that rotates with the Earth (every 23.93 hours). Trans-stilbene ($C_{14}H_{12}$) is an excellent...
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Paolo Branchini (Universita e INFN Roma Tre (IT))19/08/2025, 17:50Dark matter, Astroparticle, Gravitational waves
The Belle and Belle II experiment have collected samples of $e^+e^-$ collision data at centre-of-mass energies near the $\Upsilon(nS)$ resonances. These data have constrained kinematics and low multiplicity, which allow searches for dark sector particles in the mass range from a few MeV to 10 GeV. Using a 365 fb$^{-1}$ sample collected by Belle II, we search for inelastic dark matter and an...
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Prof. Jason Evans (Shanghai Jiaotong University/TDLI)21/08/2025, 14:00Dark matter, Astroparticle, Gravitational waves
Axion-like particles are a well-motivated candidate for ultralight dark matter. Because dark matter must be non-relativistic, the effects of its scattering with Standard Model particles are negligible and generally go unnoticed. However, due to the large occupation number of ultralight dark matter, the sum of all scatterings leads to a classical field-like interaction with Standard Model...
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Reza Ebadi (University of Maryland, College Park)21/08/2025, 14:20Dark matter, Astroparticle, Gravitational waves
We introduce GALILEO, a novel experimental approach to detect light dark matter candidates through precision optical interferometry. The method exploits the sensitivity of electro-optical materials, whose refractive indices are modulated by a coherently oscillating dark matter field. Using a highprecision resonant Michelson interferometer as the detection mechanism, GALILEO enables the...
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Chang Sub SHIN (Chungnam National University)21/08/2025, 14:40Dark matter, Astroparticle, Gravitational waves
Red giants (RGs) provide a promising astrophysical environment for capturing dark matter (DM) via elastic scattering with stellar nuclei. Captured DM particles migrate toward the helium-rich core and accumulate into a compact configuration. As the DM population grows, it can become self-gravitating and undergo gravitational collapse, leading to adiabatic contraction through interactions with...
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Qiushi Wei (University of Florida)21/08/2025, 15:00Dark matter, Astroparticle, Gravitational waves
Ultralight vector dark matter induces metric fluctuations that generate timing residuals in the arrival times of pulsar emissions through two distinct modes: a fast mode, sourced by coherent field oscillations, and a slow mode, arising from interference patterns. These modes enable the detection of vector dark matter with masses $m \sim 10^{-24} - 10^{-22}\ \mathrm{eV}$ and $m \sim 10^{-18} -...
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Erwin Tanin (Stanford)21/08/2025, 15:20Dark matter, Astroparticle, Gravitational waves
Dark matter may exist today in the form of macroscopic composite bound states. Collisions between such dark matter states can release intense bursts of radiation that includes gamma-rays among the final products. Thus, indirect-detection signals of dark matter may include unconventional gamma-ray bursts. Such bursts may have been missed not necessarily because of their low arriving gamma-ray...
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Dr Subhojit Roy (Argonne National Laboratory)21/08/2025, 15:40Dark matter, Astroparticle, Gravitational waves
We explore a simple and predictive dark matter scenario involving a complex scalar field, $\phi$, coupled to the Higgs portal with no additional field content. In the UV, the field possesses a global $U(1)$ symmetry which is broken by mass terms and Higgs portal interactions. In the mass basis, the complex field splits into a pair of real scalars with a small mass splitting (in analogy with...
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Bashi Mandava (UC Berkeley)21/08/2025, 16:30Dark matter, Astroparticle, Gravitational waves
Self-interacting dark matter (SIDM) provides an intriguing alternative to collisionless dark matter, especially when it comes to resolving small-scale structure problems. I will present our preliminary findings on gravothermal collapse in SIDM halos using an extended version of the GravothermalSIDM code, now capable of incorporating velocity-dependent cross sections from the CLASSICS...
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Kailash Raman (University of California, Berkeley)21/08/2025, 16:50Dark matter, Astroparticle, Gravitational waves
Dark matter dominated dwarf galaxies are considered excellent targets for probing particle dark matter and galaxy formation. However, current estimates of dark matter density profiles for these systems may be prone to systematic uncertainties. In this talk, I will discuss a new method for inferring dwarf galaxy characteristics from semi-analytic modeling and explore the associated systematics....
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Dr Sebastian Wagner-Carena (Flatiron / NYU)21/08/2025, 17:10Dark matter, Astroparticle, Gravitational waves
Strong gravitational lenses are a singular probe of the Universe's small-scale structureโthey are sensitive to the gravitational effects of low-mass ($<10^{10} M_\odot$) halos even without a luminous counterpart. Constraining structure at these scales opens a window into the phenomenological properties of dark matter, allowing us to constrain self-interacting, warm, and fuzzy dark matter...
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Eve Schoen (UC Berkeley)21/08/2025, 17:30Dark matter, Astroparticle, Gravitational waves
An excess of gamma rays from the Galactic center is observed by the Fermi Space Telescope. The two leading hypotheses for the cause of this excess are millisecond pulsars or dark matter. Generically, we expect the statistics of these two sources to differ. We train a graph convolutional neural network (NN) to accurately determine the relative flux contribution of point sources to the Galactic...
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Pierce Giffin21/08/2025, 17:50Dark matter, Astroparticle, Gravitational waves
If the dark sector possesses long-range self-interactions, these interactions can source dramatic collective instabilities even in astrophysical settings where the collisional mean free path is long. Here, we focus on the specific case of dark matter halos composed of a dark $๐โก(1)$ gauge sector undergoing a dissociative cluster merger. We study this by performing the first dedicated...
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Arushi Bodas21/08/2025, 18:10Dark matter, Astroparticle, Gravitational waves
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Andrew Yi22/08/2025, 14:00Dark matter, Astroparticle, Gravitational waves
QCD axions are the resulting bosons from the Peccei-Quinn mechanism which solves the strong CP problem, and are also a convincing candidate for wavelike dark matter. The Axion Dark Matter Experiment (ADMX) is an axion haloscope located at the University of Washington which directly detects axions through axion-photon coupling. Since the axion mass and corresponding conversion photon frequency...
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Pamela Stark22/08/2025, 14:20Dark matter, Astroparticle, Gravitational waves
The QCD axion is a well-motivated dark matter candidate that also solves the strong CP problem. Axion detection often relies on axion-to-photon conversion in a strong magnetic field, inducing a monochromatic AC signal whose frequency depends on the unknown axion mass and may span over ten orders of magnitude. The most sensitive searchesโscanning resonant experimentsโuse high-Q resonators to...
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Jacob Laurel (Stanford, SLAC)22/08/2025, 14:40Dark matter, Astroparticle, Gravitational waves
Axions are theoretical particles which explain why the strong force does not violate CP symmetry, and can be created in the early universe in enough abundance to account for all of dark matter, making them a very compelling dark matter candidate. The axion couples feebly to magnetic fields, converting to a photon; using resonant cavities in the presence of a strong magnetic field we can detect...
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Karolina Filipowicz22/08/2025, 15:00Dark matter, Astroparticle, Gravitational waves
This work extends a BSM scenario based on a dark color gauge group SO($N_{\mathrm{DC}}$), with a vector-like heavy SU(2) doublet and one Majorana SM singlet, recently introduced by Antipin et al., and later investigated by Contino et al. We extend the dark flavour sector to two Majorana singlets and explore the possibility of the emergence of Dark Pions, pNGBs of spontaneous symmetry breaking...
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Dr Nuria Castello-Mor (Universidad de Cantabria, CSIC, Instituto de Fisica de Cantabria IFCA, (ES))22/08/2025, 15:20Dark matter, Astroparticle, Gravitational waves
The DAMIC-M (DArk Matter In CCDs at Modane) experiment is scheduled to begin operations at the Modane underground laboratory (LSM) in late 2025. This talk presents the current status of the project, highlighting recent results from its prototypeโthe Low-Background Chamber (LBC)โand progress on detector construction at LSM. Data from the LBC have been used to exclude theoretical benchmarks...
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William Matava (UC Berkeley)22/08/2025, 15:40Dark matter, Astroparticle, Gravitational waves
The TESSERACT project will use a slate of target materials optimized for MeV to few-GeV mass dark matter searches alongside transition-edge-sensors to set world-leading limits on the dark matter/nucleon cross-section. After a brief overview of the experimental goals and sensor technologies, I will discuss the status of the superfluid He-4 target, (HeRALD,) for which multi-channel readout has...
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