Electromagnetic properties of the neutrinos in gamma-proton collision at the LHC

Abstract

We have investigated non-standard $\nu \bar{\nu }\gamma$ and $\nu \bar{\nu }\gamma \gamma$ couplings via $\nu \bar{\nu }$ production in a $\gamma p$ collision at the LHC. We obtain 95\% confidence level bounds on $\nu \bar{\nu }\gamma$ and $\nu \bar{\nu }\gamma \gamma$ couplings by considering three different forward detector acceptances; $0.0015<\xi <0.15$, $0.0015<\xi <0.5$ and $0.1<\xi <0.5$. We show that the reaction $pp\to p\gamma p\to p\nu \bar{\nu }qX$ provides more than eight orders of magnitude improvement in neutrino-two photon couplings compared to LEP limits.

Comments: 18 pages, 5 figures