Sfermion Precision Measurements at a Linear Collider

Details Sfermion Precision Measurements at a Linear Collider Sfermion Precision Measurements at a Linear Collider

2002-11-07

arxiv.org/abs/hep-ph/0211108v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

Expanded version of contributions to the proceedings of ICHEP'02 (Amsterdam) and LCWS 2002 (Jeju Island)

Scientific paper

10.1016/S0920-5632(03)90679-7

At future e+- e- linear colliders, the event rates and clean signals of scalar fermion production - in particular for the scalar leptons - allow very precise measurements of their masses and couplings and the determination of their quantum numbers. Various methods are proposed for extracting these parameters from the data at the sfermion thresholds and in the continuum. At the same time, NLO radiative corrections and non-zero width effects have been calculated in order to match the experimental accuracy. The substantial mixing expected for the third generation sfermions opens up additional opportunities. Techniques are presented for determining potential CP-violating phases and for extracting tan(beta) from the stau sector, in particular at high values. The consequences of possible large mass differences in the stop and sbottom system are explored in dedicated analyses.

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