Tevatron Discovery Potential for Fourth Generation Neutrinos: Dirac, Majorana and Everything in Between

TL;DR

This paper evaluates the Tevatron collider's ability to detect or exclude fourth-generation neutrinos, covering a broad range of neutrino types and mixing scenarios, and extends previous mass limits significantly.

Contribution

It provides a comprehensive analysis of Tevatron's potential to discover or exclude various fourth-generation neutrinos, including mixed Dirac and Majorana types, across the entire mixing parameter space.

Findings

Tevatron can extend neutrino mass limits up to 150-175 GeV.

Powerful exclusion or discovery potential across the full mixing space.

Analysis encompasses both Dirac and Majorana neutrino scenarios.

Abstract

We analyze the power of the Tevatron dataset to exclude or discover fourth generation neutrinos. In a general framework, one can have mixed left- and right-handed neutrinos, with Dirac and Majorana neutrinos as extreme cases. We demonstrate that a single Tevatron experiment can make powerful statements across the entire mixing space, extending LEP's mass limits of 60-80 GeV up to 150-175 GeV, depending on the mixing.