Nordic meeting on Dark Matter searches

Session

Contributed Talks

22 May 2024, 11:00

M006 (Western Norway University of Applied Sciences)

Conveners

Contributed Talks

• Steffen Maeland (Western Norway University of Applied Sciences)

Contributed Talks

• Trygve Buanes (Western Norway University of Applied Sciences (NO))

Contributed Talks

• Julia Isabell Djuvsland (University of Bergen (NO))

Contributed Talks

• Igor Slazyk (University of Bergen (NO))

5. A search for heavy neutral gauge bosons and dark-sector particles with the ATLAS detector

Even Simonsen Haaland (University of Oslo (NO))

22/05/2024, 11:00

We present a search for a new neutral vector boson ($Z^\prime$) produced in association with dark states that do not interact via the Standard Model interactions. The search is performed using proton-proton collisions at $\sqrt{s}=13~$TeV corresponding to an integrated luminosity of $140~$fb$^{-1}$ recorded by the ATLAS detector at the Large Hadron Collider. The $Z^\prime$ boson is assumed to...

9. Hunting the Supersymmetric Dark Matter with taus

Sohaib Hassan (University of Bergen (NO))

22/05/2024, 11:30

Supersymmetry is one of the best-motivated proposals for physics beyond the Standard Model. One of the primary motivations for the supersymmetry rests on the observation that the LSP (lightest supersymmetric particle) in R-parity conserving models is massive, naturally neutral and stable. This synergy of properties casts the LSP as an excellent candidate for the dark matter (DM). The stau...

1. Global fits of simplified dark matter models with GAMBIT

Christopher Chang

22/05/2024, 15:30

Simplified dark matter models are a form of effective theory that offer search targets for both low-energy dark matter and high-energy collider experiments. In this talk I will discuss several global fits of simplified dark matter models with GAMBIT, focussing on four different models all coupled to the Standard Model by a spin-1 vector mediator. For one of these models, I will also discuss...

3. Asymmetries in invisible Dark Matter mediator production associated with $t\bar{t}$ final states

Rui Miguel Silva (Universidade do Minho/CFUMUP,LIP)

22/05/2024, 16:00

In this paper, we propose two sets of different CP-sensitive observables inspired by the Higgs production in association with the top quark. We employ a Dark Matter simplified model that couples a scalar particle with three generation fermions with a mass equal to that of the top quark. The reconstruction of the kinematic variables is presented at NLO accuracy for events associated with this...

2. Indirect detection of minimal dark matter quintuplet

Mr Mohammad Aghaie (University of Pisa)

23/05/2024, 11:00

In the wake of the recent computation of bound state formation cross-section for minimal dark matter quintuplet that introduces a new signal for indirect detection, we go through 15-year Fermi-LAT data looking for this new line. We examine Fermi-LAT data from the galactic center to assess its capability to detect or rule out a potential line arising from bound-state formation. Our findings...

10. Measuring the Dark Matter Content of Dwarf Spheroidal Galaxies and Globular Clusters

Francesco G. Saturni

23/05/2024, 11:30

Dark matter (DM), a large (~85%) non-baryonic and non-relativistic
component of the matter density of the Universe, likely consists of one
or several so-far undetected particles hypothesized in theories beyond
the Standard Model (SM). One of the most promising approaches to shed
light on the nature of DM particles is to search for signatures of their
annihilation or decay into SM...

6. New results for searches of exotic decays with NA62 in beam-dump mode

Ilaria Rosa (Universita Federico II e INFN Sezione di Napoli (IT))

24/05/2024, 11:00

The NA62 experiment at CERN took data in 2016–2018 with the main goal of measuring the $K^+ \rightarrow \pi^+ \nu \bar\nu$ decay. In this talk we report on the search for visible decays of exotic mediators from data taken in "beam-dump" mode with the NA62 experiment. NA62 can be run as a "beam-dump" experiment by removing the kaon production target and moving the upstream collimators into a...

7. Detecting dark matter around massive black holes using gravitational waves

Renske Wierda (KTH Royal Institute of Technology (SE))

24/05/2024, 11:30

Gravitational waves could be used as a novel probe of dark matter. In compact binary mergers with extreme mass-ratios, the gravitational interaction between the secondary object and its dark matter environment can speed up the inspiral, leaving an imprint on the gravitational waveform. With the recently approved LISA space interferometer, many extreme mass ratio signals will become detectable....

8. What blazar jets tell us about axion-like particles

Oindrila Ghosh (Stockholm University & the Oskar Klein Centre)

24/05/2024, 12:00

Prompt emissions from TeV blazars pair produce on the extragalactic background light and the resulting electrons and positrons then undergo inverse Compton scattering, giving rise to secondary gamma-rays. The non-observation of such reprocessed emission implies a suppression of cascades from TeV blazars. In addition to the deflection of the electron-positron pairs off the line of sight by the...

4. Two-loop form factors for Dark Matter annihilation to colored Standard Model particles

Warsimakram Imamsab Katapur

A UV complete model where the Dark Matter (DM) particle interacts with gluons via a colored scalar mediator provides a viable phenomenological model that can be tested at hadron colliders. While Mono-jet signatures are relevant for Collider searches, zero-jet processes would mean complete annihilation of Standard Model (SM) particles to DM particles, which contribute to relic-density of DM. We...