PPC 2021: XIV International Workshop on Interconnections between Particle Physics and Cosmology

Session

Neutrinos 1

19 May 2021, 14:00

Conveners

Neutrinos 1

• Julia Gehrlein

111. keV Sterile Neutrino Dark Matter Terrestrial Searches: Alive and Well

Ms Cristina Benso (Max Planck Institute for Nuclear Physics in Heidelberg)

19/05/2021, 14:00

Neutrinos

What if the dark matter content of the universe was made up of sterile neutrinos with a mass of the order of keV?
Currently, constraints from the measured relic abundance of dark matter and from observations in the X-ray band threaten the possibility of finding in terrestrial experiments a signal of such sterile neutrinos produced through oscillation and collisions in the early universe.
We...

268. Unified framework for B-anomalies, muon g-2 and neutrino masses

Anil Thapa

19/05/2021, 14:15

BSM Physics

We present a model of radiative neutrino masses which also resolves anomalies reported in $B$-meson decays, $R_{D^{(\star)}}$ and $R_{K^{(\star)}}$, as well as in muon $g-2$ measurement, $\Delta a_\mu$. Neutrino masses arise in the model through loop diagrams involving TeV-scale leptoquark (LQ) scalars $R_2$ and $S_3$. Fits to neutrino oscillation parameters are obtained satisfying all flavor...

165. Muon g−2 Anomaly and Neutrino Magnetic Moments

Vishnu Padmanabhan Kovilakam (Oklahoma State University)

19/05/2021, 14:30

We present a novel framework based on $SU(2)_H$ horizontal symmetry, which generates a naturally large neutrino transition magnetic moment and explains the XENON1T electron recoil excess also predicts a positive shift in the muon anomalous magnetic moment. This shift is of the right magnitude to be consistent with the Brookhaven measurement as well as the recent Fermilab measurement of the...

262. Hidden Photons in light of g-2

Patrick Foldenauer

19/05/2021, 14:45

Recently, the Muon g-2 collaboration released their first result of the muon anomalous magnetic moment $(g-2)_\mu$ measured with the E989 experiment at Fermilab. When combined with previous data this result confirms a 4.2 $\sigma$ excess over the Standard Model prediction. In light of this exciting news an anomaly-free $U(1)_{L_\mu-L_\tau}$ allows for an explanation of $(g-2)_\mu$ with a...

139. Probing Baryogenesis using Neutron-Anti-Neutron Oscillation

Kare Fridell (Technical University of Munich (TUM))

19/05/2021, 15:00

BSM Physics

Neutron-Anti-neutron ($n$-$\bar{n}$) oscillation is a baryon number violating process that requires New Physics beyond the Standard model, and will be probed in future experiments at ESS and DUNE. We study the potential consequences of a future $n$-$\bar{n}$ oscillation signal for baryogenesis, in an effective field theory framework and for one of the two possible UV complete topologies. We...

98. The Singly-Charged Scalar Singlet as the Origin of Neutrino Masses

Tobias Felkl (University of New South Wales)

19/05/2021, 15:15

Neutrinos

We consider the generation of neutrino masses via a singly-charged scalar singlet. Under general assumptions we identify two distinct structures for the neutrino mass matrix. This yields a constraint for the antisymmetric Yukawa coupling of the singly-charged scalar singlet to two left-handed lepton doublets, irrespective of how the breaking of lepton-number conservation is achieved. The...