Constraining the Active-to-Heavy-Neutrino transitional magnetic moments associated with the $Z'$ interactions at FASER$ν$

Abstract

We investigate the effects of the transitional magnetic dipole moment of the active-to-heavyneutrino associated with a new neutral gauge boson Z on neutrino-nucleon scattering at the For-wArd Search ExpeRiment-ν (FASERν). We consider the neutral-current neutrino-nucleon scattering (νA → N A) as the production mechanism of the heavy neutrino N at FASERν and estimate the sensitivity reach on the magnetic moment coupling µ να for a range of heavy neutrino mass (1 GeV < M N < 70GeV). In this study, we consider three benchmark models, in which the heavy neutrino is coupled to L e , L µ or L τ doublet, respectively.

Sensitivities on dark photon from the forward physics experiments

“…Proton-proton collisions at the Large Hadron Collider (LHC) produce many particles along the beam axis. Forward Physics Facilities (FPF) [13][14][15][16][17][18][19][20][21][22], situated several hundred meters away from the ATLAS interaction point and protected by concrete and rock, will host a wide variety of experiments probing the SM processes and also searching for new physics beyond the standard model (BSM) [13,[23][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39][40][41][42]. Each experiment in the FPF is uniquely optimized for its own physics goals.…”

Investigating boson sector in an extended standard model with U(1) D symmetry

“…It also could be lighter than the electroweak scale if it has small interaction couplings with the SM particles. Many searches for the Z¢ gauge bosons have been carried out and give experimental constraints on its parameters [28][29][30][31][32][33][34][35]. This extra gauge boson provides phenomenological implications as well as significant consequences for future collider physics and cosmology.…”

“…In the second stage, the exact diagonalization is done using the Euler rotation matrix R in equation(32). Thus, we have Due to rotation by the matrix R, then the h 1 -h 2 mixing angle, β, can also be obtained as, to the mixing angle given in equation(37).…”