B-> X_sl^+l^- and B->Kπdecays in vectorlike quark model
| dc.creator | Morozumi, T. | |
| dc.creator | Xiong, Z. | |
| dc.creator | Yoshikawa, T. | |
| dc.date | 2004-08-26 | |
| dc.date | 2004-08-27 | |
| dc.date.accessioned | 2026-07-07T03:53:15Z | |
| dc.date.available | 2026-07-07T03:53:15Z | |
| dc.description | In the framework of SU(2) singlet down type vectorlike quark model, we present a comprehensive analysis for decays B-> X_s γ, B->X_sl^+l^- and B-> Kπ. As for B-> X_sγ, we include the QCD running from the mass of the down-type vector quark D to weak scale in the scenario with the D quark much heavier than weak scale, and find that the running effect is small. Using the recent measurements of B-> X_sl^+l^-, we extract rather stringent constraints on the size and CP violating phase of z_{sb}, i.e., the tree level FCNC coupling for b-> sZ. Within the bounds, we investigate various observables such as forward-backward asymmetry of b->s l^+ l^-, the decay rates of B ->X_sγ, and B\to Kπ. We find that (1) The forward-backward asymmetry may have large derivation from that of the SM and is very sensitive to z_{sb}, and thus can be useful in probing the new physics.(2) By taking experimental errors at 2σlevel, both experimental measurements for B->X_sl^+l^- and B->Kπdecays can be explained in this model. | |
| dc.description | 23 pages, 15 figures, revtex | |
| dc.identifier | https://arxiv.org/abs/hep-ph/0408297 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/0408297 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/43767 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | B-> X_sl^+l^- and B->Kπdecays in vectorlike quark model | |
| dc.type | text |