Testing the Majorana nature of neutralinos in supersymmetric theories

Details Testing the Majorana nature of neutralinos in supersymmetric theories Testing the Majorana nature of neutralinos in supersymmetric theories

2003-06-30

arxiv.org/abs/hep-ph/0307001v2

Nucl.Phys. B675 (2003) 70-98

Physics

High Energy Physics

High Energy Physics - Phenomenology

LaTeX, 35 pages, 23 PS figures. Some clarifications, comments and references added, typos corrected. Final version to appear i

Scientific paper

10.1016/j.nuclphysb.2003.09.055

We discuss selectron pair production in e- e- scattering. These processes can only occur via t-channel neutralino exchange, provided that the neutralinos are Majorana fermions. We concentrate on the processes e- e- -> e^~_L e^~_L,e^~_R e^~_R -> e- X^~_1^0 e- X^~_2^0 -> e- X^~_1^0 e- X^~_1^0 f f, in which a complete determination of the final state momenta is possible without using the selectron masses as input. The experimental reconstruction of the selectron masses in this decay channel provides clear evidence of the Majorana character of the neutralinos, which is confirmed by the analysis of the electron energy spectrum.

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