Towards an exact evaluation of the supersymmetric O(alpha_s tan beta) corrections to \bar{B} -> X_s gamma

Simple item page
dc.creatorBorzumati, Francesca
dc.creatorGreub, Christoph
dc.creatorYamada, Youichi
dc.date2003-05-07
dc.date.accessioned2026-07-07T03:49:36Z
dc.date.available2026-07-07T03:49:36Z
dc.descriptionThe charged-Higgs contributions to the decay \bar{B} -> X_s gamma are discussed in the minimal supersymmetric standard model at large tan beta. These contributions receive two-loop O(alpha_s tan beta) corrections by squark-gluino subloops, which are nondecoupling in the limit of heavy superpartners and possibly large. Their leading parts are already known and were evaluated by using an effective two-Higgs-doublet Lagrangian. Subleading corrections coming from higher-dimension operators in the effective Lagrangian were ignored, although this is not, a priori, justified when m_{H^\pm} is not much smaller than the typical supersymmetric mass M_{SUSY}. Here, we calculate all subleading terms of the O(alpha_s tan beta) corrections up to O((m_t^2,m_{H^\pm}^2/M_{SUSY}^2)^2), as well as all the exact two-loop diagrams with squark-gluino subloops, beyond the effective-Lagrangian approximation. Comments are made on the size of these corrections.
dc.description1+10 pages, Based on talks given by Y. Yamada at ``KEK Theory Meeting on Collider Physics'', KEK, Tsukuba, Japan, February 20-22, 2003, and ``The 8th Accelerator and Particle Physics Institute (APPI2003)'', Appi, Iwate, Japan, February 25-28, 2003
dc.identifierhttps://arxiv.org/abs/hep-ph/0305063
dc.identifierhttp://arxiv.org/abs/hep-ph/0305063
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/42463
dc.subjectHigh Energy Physics - Phenomenology
dc.titleTowards an exact evaluation of the supersymmetric O(alpha_s tan beta) corrections to \bar{B} -> X_s gamma
dc.typetext

Files

Collections

arXiv