Determining Sneutrino Masses and Physical Implications

Details Determining Sneutrino Masses and Physical Implications Determining Sneutrino Masses and Physical Implications

2005-09-07

arxiv.org/abs/hep-ph/0509056v1

Phys.Rev.D72:115002,2005

Physics

High Energy Physics

High Energy Physics - Phenomenology

20 pp

Scientific paper

10.1103/PhysRevD.72.115002

In some areas of supersymmetry parameter space, sneutrinos are lighter than the charginos and the next-to-lightest neutralino, and they decay into the invisible neutrino plus lightest-neutralino channel with probability one. In such a scenario they can be searched for in decays of charginos that are pair-produced in e+e- collisions, and in associated sneutrino-chargino production in photon-electron collisions. The sneutrino properties can be determined with high accuracy from the edges of the decay energy spectra in the first case and from threshold scans in the second. In the final part of the report we investigate the mass difference of sneutrinos and charged sleptons between the third and the first two generations in seesaw-type models of the neutrino/sneutrino sector. For a wide range these mass differences are sensitive to the seesaw scale.

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