Conveners
Research talks
- Jan Heisig (RWTH Aachen)
Research talks
- Tracy Slatyer (MIT)
Research talks
- Mattia Di Mauro (INFN Torino)
Research talks
- There are no conveners in this block
Research talks
- Chiara Arina (IRMP)
- David Cerdeño (IFT-UAM/CSIC)
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Johann Plotnikov (Karlsruhe Institute of Technology (ITP))16/06/2025, 17:30
We present the C++ program RelExt for Standard Model (SM) extensions that feature a Dark Matter (DM) candidate. The tool allows to efficiently scan the parameter spaces of these models to find parameter combinations that lead to relic density values which are compatible with the measured value within the uncertainty specified by the user. The code computes the relic density for freeze-out...
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Shiuli Chatterjee (National Centre for Nuclear Research, Warsaw)16/06/2025, 17:45
The traditional tools to calculate the relic abundance of dark matter (DM) typically solve the Boltzmann equation at an integrated level---reducing the evolution of the phase space density to that of the number density---and in doing so are crucially reliant upon the assumption of chemical decoupling of DM preceding its kinetic decoupling from the Standard Model heat bath. However, this...
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Ana Luisa Foguel (University of São Paulo)16/06/2025, 18:00
Despite robust cosmological and astrophysical evidence for the existence of non-baryonic Dark Matter (DM), its microscopic nature remains a mystery. Among the several possible scenarios, light DM candidates thermally produced in the early Universe are especially interesting, as they are both theoretically motivated and experimentally accessible. In this context, inelastic dark matter (iDM)...
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Dr Arpan Kar (LPTHE, CNRS & Sorbonne University)17/06/2025, 17:30
Weak-scale Dark Matter (DM) particles annihilating into lepton-rich channels in the Galaxy not only produce $\gamma$-rays via prompt radiation, but also generate abundant energetic $e^\pm$, which subsequently emit through inverse Compton scattering or bremsstrahlung (collectively called `secondary-radiation photons'). While the prompt $\gamma$-rays concentrate at high-energy, the secondary...
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Laura Eisenberger (University of Würzburg)17/06/2025, 17:50
The Andromeda galaxy (M31) is a promising target for the indirect search of dark matter (DM) due to its proximity and expected massive DM halo. It functions as test case for a Milky Way (MW) like galaxy as the isotropic emission from the MW halo itself cannot be detected with a coded mask telescope like INTEGRAL/SPI. MeV data can put strong limits on DM models from the MeV up to the TeV mass...
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Isabelle John17/06/2025, 18:05
Dark matter can be captured in stars and annihilate, providing the star with a new energy source in addition to nuclear fusion. This significantly changes stellar evolution at the Galactic Center, where the dark matter density is extremely high. As dark matter burning replaces nuclear fusion partially or completely, stars become longer-lived, as they use up hydrogen more conservatively, or...
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Keyun Wu (University de Barcelona)17/06/2025, 18:20
Minimal Flavor Violation (MFV) offers an appealing framework for exploring physics beyond the Standard Model. Interestingly, within the MFV framework, a new colorless field that transforms non-trivially under a global SU(3)3 quark flavor group can naturally be stable. Such a new field is thus a promising dark matter candidate, provided it is electrically neutral. We extend the MFV framework...
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Lena Rathmann17/06/2025, 18:35
The null results of dark matter searches targeting weakly interacting massive particles (WIMPs) put increasing pressure on the simplest realizations of WIMP models. In response, we explore an extended dark sector with a non-trivial flavor structure within the Dark Minimal Flavor Violation (DMFV) framework. These models extend the standard dark matter paradigm by introducing flavor-dependent...
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Lorenzo Stefanuto (University of Turin)18/06/2025, 17:30
Cosmic antideuterons offer a unique window for dark matter searches, but their prediction still suffers from uncertainties in coalescence models. A recent Wigner-function-based approach using the Argonne v₁₈ wavefunction has greatly improved the modeling of antideuteron production from dark matter annihilation and decay. In this talk, we introduce a new project, still at an early stage,...
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Marta Razza (INFN Bologna, University of Bologna)18/06/2025, 17:40
The nature of dark matter remains unknown. In the particle hypothesis, the detection of antinuclei by space-borne experiments near Earth has been identified as a potential smoking gun for dark matter signals. Due to their astrophysical background being highly suppressed for kinetic energies below 1 GeV/c, antinuclei represent an attractive search channel. Recently, theoretical efforts have...
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Jordan Koechler (INFN Turin)18/06/2025, 17:55
In this talk, we present a tuning of PYTHIA and a coalescence model that leads to realistic predictions of antinuclei production. This tuning is validated against LEP data including the fragmentation function of $b$-quarks into into $b$-hadrons, which is crucial for determining the $\bar{\Lambda}_b^0$ multiplicity. The coalescence model is tuned to ALICE data for the $\overline{\text{D}}$ and...
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Agnese Tolino (IFIC (CSIC-UV))18/06/2025, 18:10
Light primordial black holes (PBHs) may have originated in the early Universe, and could contribute to the dark matter in the Universe.
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Their Hawking evaporation into particles could eventually lead to the production of antinuclei, which
propagate and arrive at Earth as cosmic rays with a flux peaked at GeV energies.
We revisit here the antiproton and antideuteron signatures from PBH... -
Giovanni Malfattore (University & INFN, Bologna (IT))18/06/2025, 18:20
The formation mechanism of light (anti)nuclei in high-energy hadronic collisions remains an open question that is being actively investigated both from theoretical and experimental perspectives. In particular, the (anti)nuclei production at particle accelerator provides a fundamental input to constrain the flux of antinuclei produced from cosmic ray interactions with the interstellar matter,...
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Mattia Di Mauro (INFN Torino)19/06/2025, 11:35
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Bhashin Thakore19/06/2025, 12:05
Our understanding of the γ-ray sky has improved dramatically in the past decade,
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however, the unresolved γ-ray background (UGRB) still has a potential wealth of information about the faintest γ-ray sources pervading the Universe. Statistical cross-correlations with tracers of cosmic structure can indirectly identify the populations that most characterize the γ-ray background. We analyse the... -
Margaux Jomain (LAPTh)19/06/2025, 14:00
Thermal Dark Matter (DM) below the GeV scale faces strong cosmological and astrophysical constraints, with Cosmic Microwave Background (CMB) observations excluding s-wave annihilation cross-sections for thermal DM below 10 GeV. Such limits can be evaded with velocity dependent cross-sections, for example when DM annihilates near a narrow resonance. In this work, we explore the impact of...
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Karim Elyaouti (Institut für Technologie)19/06/2025, 14:15
Many Standard Model extensions feature a dark matter (DM) candidate produced via freeze-out, but often fail to account for the full relic density. We show that adding a second DM candidate via the freeze-in mechanism can resolve this issue. In such two-component DM models, the freeze-out particle may remain undetectable due to its low density, while a Feebly Interacting Massive Particle (FIMP)...
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Thomas Reggio (LPCA)19/06/2025, 14:30
The freeze-in mechanism is an alternative mechanism for dark matter production to standard thermal freeze-out. Freeze-in computations are typically performed assuming a very high initial ("reheating") temperature. However, this temperature is poorly constrained and can take relatively small values. I will discuss dark matter freeze-in in such a scenario and highlight how dark matter production...
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Stefan Lederer19/06/2025, 14:45
I will present a Mathematica code, to be made public in the near future, which computes Sommerfeld enhanced annihilation cross-sections to obtain relic densities for neutralino dark matter as well as semi-inclusive photon endpoint spectra up to $\mathcal{O}(1\%)$ corrections.
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The main purpose of this tool is to provide reliable, state-of-the-art theory predictions in general, mixed MSSM... -
Pavao Brica (Karlsuruhe Institute of Technology)19/06/2025, 15:00
I will present the results for our computation of the next-to-leading-order QCD corrections to the annihilation process of two dark matter particles into a W boson, a massless quark and a massless antiquark. This process contributes to the computation of the dark matter relic density. The calculation has been performed within the framework of the complex singlet extension of the Standard Model...
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Pedro Gabriel (CFTC-UL and KIT)19/06/2025, 15:15
The discovery of the Higgs boson at the LHC confirms the Standard Model’s (SM) mechanism for electroweak symmetry breaking, yet the SM fails to address key cosmological phenomena such as dark matter (DM) and the matter-antimatter asymmetry. Higgs-portal models with extended scalar sectors offer promising frameworks to bridge this gap. Among them, models incorporating a complex singlet scalar...
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Tommaso Sassi (Università di Padova, INFN Padova)19/06/2025, 16:00
If dark matter is blind to standard model gauge interactions, the dark sector might not be totally secluded but connect to the visible sector via the introduction of portal interactions. In this talk, I will discuss a novel scenario where an axion-like particle acts as mediator between the SM and a complex scalar singlet dark matter candidate. The identification of physical couplings crucially...
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Sreemanti Chakraborti (sreemanti.chakraborti@durham.ac.uk)19/06/2025, 16:15
Axion-like particles (ALPs) are compelling dark matter candidates, particularly in the "ultralight mass regime." In this talk, I will discuss the theoretical framework for ALP interactions with Standard Model fields, emphasising the renormalization group (RG) running and low-energy matching in quantum field theory. Many quantum sensor experiments are designed to probe very light ALPs, which...
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Thong T. Q. Nguyen (Stockholm University, OKC)19/06/2025, 16:35
With their large exposures from the heaven, celestial objects serve as natural dark matter detectors. For leptophilic dark matter, interactions with electrons inside these objects can lead to energy loss, allowing dark matter to become gravitationally bound. Using the Sun and observations by Super-Kamiokande, we set world-leading constraints on the dark matter–electron scattering cross section...
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Theresa Backes19/06/2025, 16:50
Within the many different possible extensions of the Standard Model (SM) to describe dark matter, the addition of an extra U(1) gauge boson called dark photon is a particularly attractive possibility because of it predictivity and simplicity. These particles interact with the SM solely through kinetic mixing with standard photons and can acquire mass via the Stückelberg mechanism. For sub-keV...
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