Third EuCAPT Annual Symposium

Session

Particle Astrophysics

31 May 2023, 14:00

500/1-001 - Main Auditorium (CERN)

Conveners

Particle Astrophysics

• Pasquale Serpico

Particle Astrophysics

• Pasquale Serpico

30. Stellar Probes of Feebly Interacting Particles, Circa 2023

Edoardo Vitagliano

31/05/2023, 14:00

Stellar observables have often been shown to be powerful probes in searches for Feebly interacting particles (FIPs), such as axions, scalars, dark photons, and majorons. In this talk, I will summarize some of the most recent developments, with a focus on supernovae and astrophysical transients.

31. Particle emission from pulsars

Silvia Manconi

31/05/2023, 14:30

147. Multimessenger astrophysics with high-energy neutrinos

Prof. Foteini Oikonomou (NTNU)

31/05/2023, 15:00

50. Impact of Neutrino Decay on the Cosmic Neutrino Background

Leonardo Jose Ferreira Leite (University of Campinas UNICAMP (BR))

31/05/2023, 16:15

particle astrophysics (including cosmic rays, neutrinos, nuclear astrophysics)

In this work, we explore the consequences of neutrino decay facilitated by a neutral scalar on possible cosmic neutrino background (CνB) detection in the future, especially in the PTOLEMY experiment. We analyze the distortion of the expected event spectrum as a function of the singlet mass and Yukawa couplings, and we consider both a three-neutrino scenario and a scenario with an extra sterile...

102. A First Look at Sky Anosotripies of High-Energy Neutrino Flavours

Bernanda Telalovic (Niels Bohr Institute)

31/05/2023, 16:22

particle astrophysics (including cosmic rays, neutrinos, nuclear astrophysics)

Lorentz invariance is a pillar symmetry of the Standard Model. Yet, it may be violated in proposed extensions, inducing preference for particular directions in the propagation of particles. This type of Lorentz-invariance violation (LIV) is difficult to test. Fortunately, high-energy astrophysical neutrinos, with TeV–PeV energies and cosmological-scale baselines, provide us with a unique...

79. Dark Sectors and MiniBooNE Low Energy Excess

Jaime Hoefken Zink

31/05/2023, 16:29

particle astrophysics (including cosmic rays, neutrinos, nuclear astrophysics)

The aim of this presentation is to introduce a dark extension of the SM that communicates to it through three portals: neutrino, vector and scalar mixing, by which it could be possible to explain the Low Energy Excess (LEE) at MiniBooNE. In the model, Heavy Neutral leptons are produced by upscattering via a dark photon, with masses around 10 MeV – 2 GeV, and subsequently decay into an...

87. Space Plasma Instabilities Resolve GeV-TeV Tension and Constrain Light Axions

Oindrila Ghosh (Stockholm University & the Oskar Klein Centre)

31/05/2023, 16:36

particle astrophysics (including cosmic rays, neutrinos, nuclear astrophysics)

TeV blazars dominate the extragalactic gamma-ray sky and highly energetic pair beams arising from such blazar jets underproduce gamma rays in the GeV band while inverse-Compton scattering off the cosmic microwave background. Recent Fermi-LAT isotropic gamma-ray background measurements suggest that space plasma instabilities can play a crucial role in alleviating this GeV-TeV tension by...

96. The origin of ANITA-IV events from the sinergies with IceCube

Antoni Bertólez-Martínez (Departament de Física Quàntica i Astrofísica, Universitat de Barcelona)

31/05/2023, 16:43

particle astrophysics (including cosmic rays, neutrinos, nuclear astrophysics)

Recently, the ANITA collaboration announced the detection of new, unsettling Ultra-High-Energy (UHE) events. Understanding their origin is pressing to ensure success of the incoming UHE neutrino program.
In this talk, I will discuss the ANITA-IV events in contrast with the lack of observations in the IceCube Neutrino Observatory. I will introduce a general framework to study the...

105. CR antinuclei predictions and their detectability in the next years

Pedro De la Torre Luque

31/05/2023, 16:50

particle astrophysics (including cosmic rays, neutrinos, nuclear astrophysics)

The creation of anti-nuclei in the Galaxy has been has been discussed as a possible signal of exotic production mechanisms such as primordial black hole evaporation or dark matter decay/annihilation in addition to the more conventional production from cosmic-ray (CR) interactions. Tentative observations of cosmic-ray antihelium by the AMS-02 collaboration have re-energized the quest to use...

34. Discussion

161. Lightning Talk (Q&A)

33. Lightning Talk 1

Leonardo Jose FERREIRA LEITE

156. Lightning Talk 2

Bernanda TELALOVIC

157. Lightning Talk 3

Jaime HOEFKEN ZINK

158. Lightning Talk 4

Oindrila GHOSH

159. Lightning Talk 5

Antoni BERTÓLEZ-MARTÍNEZ

160. Lightning Talk 6

Pedro DE LA TORRE LUQUE

32. Neutrino properties from astrophysics

Foteini Oikonomou

191. Q&A

190. Q&A

189. Q&A

188. Q&A

187. Q&A

186. Q&A