Search for electromagnetic properties of the neutrino in γe and γγ collisions at CLIC

Abstract

We have examined nonstandard γνν̄ and γγν ν̄ couplings via νν̄ production in eγ and γγ collisions at the Compact Linear Collider (CLIC). We obtain 95% confidence level bounds on γνν̄ and γγνν ̄ couplings by considering the backscattered photon distribution function for incoming photons and initial state radiation and beamstrahlung effect for initial state electrons in the eγ and γγ collider modes of the linear collider. We indicate that the reaction γγ→νν ̄ provides more than 15 orders of magnitude improvement in neutrino-two photon couplings compared to LEP limits. © 2012 American Physical Society.