Delta M-K and epsilon(K) in SUSY at the Next-to-Leading order

Citation
M. Ciuchini et al., Delta M-K and epsilon(K) in SUSY at the Next-to-Leading order, J HIGH EN P, (10), 1998, pp. NIL_111-NIL_133
Citations number
50
Categorie Soggetti
Physics
Journal title
JOURNAL OF HIGH ENERGY PHYSICS
ISSN journal
10298479 → ACNP
Issue
10
Year of publication
1998
Pages
NIL_111 - NIL_133
Database
ISI
SICI code
1029-8479(199812):10<NIL_111:DMAEIS>2.0.ZU;2-9
Abstract
We perform a Next-to-Leading order analysis of Delta S = 2 processes beyond the Standard Model. Combining the recently computed NLO anomalous dimensio ns and the B parameters of the most general Delta S = 2 effective Hamiltoni an, we give an analytic formula for Delta M-K and epsilon(K) in terms of th e Wilson coefficients at the high energy scale. This expression can be used for any extension of the Standard Model with new heavy particles. Using th is result, we consider gluino-mediated contributions to Delta S = 2 transit ions in general SUSY models and provide an improved analysis of the constra ints on off-diagonal mass terms between the first two generations of down-t ype squarks. Finally, we improve the constraints on R-violating couplings f rom Delta M-K and epsilon(K).