Possible exotic neutrino signature in electron muon collisions

TL;DR

This paper explores the potential for detecting exotic neutrino signatures in electron-muon collisions, analyzing how neutrino mixings could lead to lepton flavor violation and proposing experimental signatures at colliders.

Contribution

It introduces a comprehensive analysis of exotic neutrino mixings, including non-canonical assignments, and assesses their detectability through LFV processes at colliders.

Findings

Constraints on neutrino mixing parameters from current LFV bounds.

Dependence of cross sections on heavy neutrino mass and energy.

Potential signatures of exotic neutrinos at e-mu colliders.

Abstract

With the strong experimental evidence for standard neutrino mass and mixings, there exists now a possibility of the lepton flavor violating process e\sup + mu \sup - \arrow W \sup + W \sup -, which would occur via t-channel neutrino exchange induced by neutrino mixings. We consider Langackers generalized neutrino mixings including ordinary (canonical SU(2) \sub L x U(1) \sub Y assignments), exotic (non-canonical SU(2) \sub L x U(1) \sub Y assignments) and singlet neutrinos leading to light and heavy mass eigen states. Constraints on lepton flavor violating (LFV) ordinary and heavy neutrino overlap parameters are obtained by using the current experimental bounds on LFV process Mu \arrow e gamma . These constraints are used to analyze the dependence of differential cross section and angular distribution, for the process e\sup + mu \sup - \arrow W \sup + W \sup -, on the mass of heavy (exotic) neutrino and c. m. energy (sqrt(s)). The possibility of obtaining signatures of exotic neutrino mixings at e - Mu collider is discussed.