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 $p p\to p\gamma p\to p \nu \bar \nu q X$ provides more than eight orders of magnitude improvement in neutrino-two photon couplings compared to LEP limits.