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RESEARCH PRODUCT
Determining Sneutrino Masses and Physical Implications
P.m. ZerwasA. FreitasWerner PorodWerner Porodsubject
Nuclear and High Energy PhysicsParticle physicsFOS: Physical sciencesannihilation [electron positron]decay modes [chargino]SO(10) [grand unified theory]Nuclear physicsParticle decayHigh Energy Physics - Phenomenology (hep-ph)Seesaw molecular geometrypair production [chargino]interaction [photon electron]Invariant massddc:530numerical calculationsPhysicsmass difference [slepton]High Energy Physics::PhenomenologySuperpartnerSupersymmetryboundary conditionseesaw modelHigh Energy Physics - PhenomenologyPair productionNeutralino(4lepton 2sneutrino) [final state]width [chargino]branching ratio [chargino]High Energy Physics::Experimentassociated production [sneutrino]Neutrinomass spectrum [sneutrino]description
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.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2005-09-06 |