Weakened Constraints from $b \to s γ$ on Supersymmetry Flavor Mixing Due to Next-To-Leading-Order Corrections

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dc.creatorOkumura, Ken-ichi
dc.creatorRoszkowski, Leszek
dc.date2002-08-10
dc.date2004-06-12
dc.date.accessioned2026-07-07T11:31:18Z
dc.date.available2026-07-07T11:31:18Z
dc.descriptionWe examine the process $B \to X_s γ$ in minimal supersymmetry (SUSY) with general squark flavor mixings. We include all relevant next--to--leading order (NLO) QCD corrections and dominant NLO SUSY effects from the gluino. We find that gluino--squark corrections to down--type quark masses induce large NLO corrections to the dominant Wilson coefficients whose size is often similar to those at LO, especially at large $\tanβ$. For $μ>0$, destructive interference, and suppression by the renormalization group running lead to a ``focusing effect'' of reducing the size of gluino corrections to the branching ratio, and also of reducing the LO sensitivity to flavor mixings among squarks. Constraints from $B(B \to X_s γ)$ on the SUSY--breaking scale can become significantly weakened relative to the minimal flavor violation case, even, at large $\tanβ$, for small flavor mixings. The case of $μ<0$ can also becomes allowed.
dc.descriptionRevtex4, 4 pages, 6 figures, title changed, version accepted by PRL
dc.identifierhttps://arxiv.org/abs/hep-ph/0208101
dc.identifierhttp://arxiv.org/abs/hep-ph/0208101
dc.identifierPhys.Rev.Lett.92:161801,2004
dc.identifierdoi:10.1103/PhysRevLett.92.161801
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/197221
dc.subjectHigh Energy Physics - Phenomenology
dc.titleWeakened Constraints from $b \to s γ$ on Supersymmetry Flavor Mixing Due to Next-To-Leading-Order Corrections
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