Phenomenology 2023 Symposium

Session

BSM XIII

8 May 2023, 14:15

University of Pittsburgh

Conveners

BSM XIII

• Hongkai Liu (PITT)

138. Neutrino masses and self-interacting dark matter in a Z-Z' mixing model

Leon Manuel Garcia de la Vega

08/05/2023, 14:15

In this talk we will discuss the possibility that a gauged U(1)' symmetry mediates dark matter self interactions. The breaking of this symmetry induces a Z-Z' mass mixing term, connecting the dark and visible sectors. After symmetry breaking of the U(1)', the fermion content of the dark sector is divided into right handed neutrinos and a stable dark matter candidate. We discuss the neutrino...

148. Discovering the Origin of Neutrino Masses at SHiP

Douglas Tuckler

08/05/2023, 14:30

BSM

In $U(1)_R$ extensions of supersymmetric models, the bino and its Dirac partner, the singlino, can play the role of right-handed neutrinos. The bino and the singlino form a pseudo-dirac pair, dubbed the `bi$\nu$o', which can generate Standard Model neutrino masses via the inverse seesaw mechanism. We investigate the prospects for detecting long-lived bi$\nu$os at SHiP, where GeV scale...

32. Exploring the Neutrino Sector of the Minimal Left-Right Symmetric Model

Gustavo Figueiredo Severiano Alves (University Of Sao Paulo)

08/05/2023, 14:45

BSM

We explore the neutrino sector of the minimal left-right symmetric model, with the additional charge conjugation discrete symmetry, in the novel regime where type-I and type-II seesaw mechanisms are equally responsible for the light neutrino masses, which can result in large active-sterile mixing. We show that unless the charged lepton mixing matrix is the identity and the right handed...

223. Neutrino Long-Range Self-Interaction and its impact on Cosmic Structure Formation

Xuheng Luo

08/05/2023, 15:00

BSM

In the late universe, the massive cosmic neutrino background alters the growth of structure, providing a unique opportunity to study physics beyond the standard model. In this talk, I will show that neutrinos with long-range self-interaction can significantly affect late-time cosmological observables, with coupling strengths a few orders of magnitude stronger than gravity.

166. Gravitational waves from phase transitions and cosmic strings in neutrino mass models with multiple Majorons

Dr Moinul Rahat (University of Southampton)

08/05/2023, 15:15

BSM

The origin of Majorana neutrino masses in a Majoron model provide a well-motivated scenario for the generation of identifiable primordial stochastic background of gravitational waves. In this talk I will discuss how a spectrum with a joint contribution both from a strong first order phase transition and from global cosmic strings can emerge naturally in these models. Moreover, the interplay...

228. Detecting Superradiant Dark Photon Strings in Gravitational Wave Experiments

Clayton Ristow (University of Maryland)

08/05/2023, 15:30

BSM

Black hole superradiance is a phenomenon in which, purely through gravitational interactions, light bosons are spontaneously produced outside spinning black holes. Through this effect, an exponentially growing Bose-Einstien condensate cloud forms around the black hole. In the case of dark photon superradiance, the cloud can form into strings of magnetic flux analogous to Abrikosov vortices in...

299. Collider Signatures of Near-Continuum Dark Matter

Steven Emilio Ferrante (Rutgers State Univ. of New Jersey (US))

08/05/2023, 15:45

I will describe the collider phenomenology of near-continuum dark matter, a model that gives rise to a gapped tower of Kaluza-Klein (KK) states. The model is coupled to the Standard Model via a Z-portal coupling, and the unique experimental signatures of this model include a cascade decay with large displaced vertices, a characteristic fermion energy spectrum, and more, all of which will be...