Sfermion precision measurements at a linear collider

✍ Scribed by A. Freitas; B. Ananthanarayan; A. Bartl; G. Blair; C. Blöchinger; E. Boos; A. Brandenburg; A. Datta; A. Djouadi; H. Fraas; J. Guasch; S. Hesselbach; K. Hidaka; W. Hollik; T. Kernreiter; M. Maniatis; A.v. Manteuffel; H.-U. Martyn; D.J. Miller; G. Moortgat-Pick; M. Mühlleitner; U. Nauenberg; H. Nowak; W. Porod; J. Solà; A. Sopczak; A. Stahl; M.M. Weber; P.M. Zerwas

• Publisher: Elsevier Science
• Year: 2003
• Tongue: English
• Weight: 525 KB
• Volume: 117
• Category: Article
• ISSN: 0920-5632
• DOI: 10.1016/s0920-5632(03)90679-7

✦ Synopsis

At prospective e ± e -linear colliders, the large cross-sections 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 in the third generation opens up additional opportunities. Techniques are presented for determining potential CP-violating phases and for extracting tan β 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.