Chargino mass determination at a muon collider

Barger, V.; Berger, M. S.; Han, T.

Chargino mass determination at a muon collider

Authors

Barger, V.

Berger, M. S.

Han, T.

Description

We analyze the prospects at a muon collider for measuring chargino masses in the $μ^+μ^-\to \tildeχ^+\tildeχ^-$ process in the threshold region. We find that for the lighter chargino of a mass $100-200$ GeV, a measurement better than $50-300$ MeV should be possible with 50 fb$^{-1}$ integrated luminosity. The accuracy obtained here is better than with other techniques or at other facilities. The muon sneutrino mass, which enters through the $\tildeν_μ$ exchange diagram, can also be simultaneously measured to a few GeV if it is not too heavy.
13 pages, 3 figures