Conveners
Long-Lived Particles
- Felix Kling (SLAC)
-
Herbi Dreiner (Bonn University)09/11/2020, 19:10
We have investigated the search sensitivity to long lived light neutralinos, with masses below a few GeV down to 10s of MeV, at various forward detectors. The can be produced at the LHC via rare decays of standard mesons or via rare Z-boson decays. The neutralinos decay to a lighter meson plus a charged lepton, which can be observed. We have studied a large set of proposed experiments: ANUBIS;...
Go to contribution page -
Patrick Foldenauer09/11/2020, 19:25
Extensions of the Standard Model with an abelian gauge group are constrained by gauge anomaly cancellation, fermion masses and mixing angles. These constraints only allow for a limited number of $U(1)_X$ groups. We categorise these extensions and determine the allowed textures of Yukawa and Majorana mass matrices. If neutrinos are Dirac, the only possible choice satisfying all conditions is...
Go to contribution page -
Sumit Ghosh (Texas A & M University)09/11/2020, 19:40
We consider strategies for using new datasets to probe
Go to contribution page
scenarios in which light right-handed SM fermions couple
to a new gauge group, $U(1)_{T3R}$. This scenario
provides a natural explanation for the light flavor
sector scale, and a motivation for sub-GeV dark matter.
There is parameter space which is currently allowed, but
we find that much of it can be probed... -
Takashi Shimomura (University of Miyazaki), Takashi Shimomura (University of Valencia), Takashi Shimomura09/11/2020, 19:55
FASER is one of the promising experiments which search for long-lived particles in beyond standard models.
Go to contribution page
In this paper, we focus on dark photon associating with an additional U(1) gauge symmetry, and also a scalar boson
breaking this U(1) gauge symmetry.
We study the sensitivity to the dark photon originated from U(1)-breaking scalar decays.
We find that sizable number of the dark... -
Shuailong Li09/11/2020, 20:10
Two Higgs Doublet Model (2HDM) offers a prototype for models with an extended Higgs sector beyond that of the Standard Model. It provides a rich spectrum of scalars, some of them can be relatively light with relatively weak couplings. Complementary to the usual searches for extra scalars at high energy colliders, FASER offers a unique opportunity to study those relatively long lived light...
Go to contribution page -
Guanghui Zhou (University of Massachusetts Amherst)09/11/2020, 20:25
We study the prospects of a displaced-vertex search of sterile neutrinos at the Large Hadron Collider (LHC) in the framework of the neutrino-extended Standard Model Effective Field Theory. The production and decay of sterile neutrinos can proceed via the standard active-sterile neutrino mixing in the weak current, as well as via higher-dimensional operators arising from potentially new,...
Go to contribution page -
Yongsoo Jho09/11/2020, 20:40
We investigate features of the sterile neutrinos in the presence of a light gauge boson $X$ that couples to the neutrino sector. The novel bounds on the active-sterile neutrino mixings $| U_{\ell 4} |^2$, especially for muon and tau flavors ($l = \mu, \tau$), from various collider and fixed target experiments in intensity frontiers are explored. Also, taking into account the additional decay...
Go to contribution page -
Dr juan carlos Helo (Universidad de La Serena)09/11/2020, 20:55
In this talk I will discuss the connection of different neutrino mass models with long-lived particles (LLPs). We will also discuss the prospects of the LHC and several recent experimental proposals to search for these LLPs.
Go to contribution page