Theory of Rare B Decays
| dc.creator | Ali, A. | |
| dc.date | 1997-09-30 | |
| dc.date | 1997-10-06 | |
| dc.date.accessioned | 2026-07-07T09:03:38Z | |
| dc.date.available | 2026-07-07T09:03:38Z | |
| dc.description | We discuss some selected topics in rare B decays in the context of the standard model and compare theoretical estimates with available data. Salient features of the perturbative-QCD and power corrections in the decay rate for $B \to X_s + γ$ are reviewed and this framework is used to determine the Cabibbo-Kobayashi-Maskawa (CKM) matrix element $| V_{ts} |$. We review estimates of the ratio $R_{K^*} \equiv Γ(B \to K^* + γ)/Γ(B \to X_s + γ)$ in a number of theoretical models, which give a consistent account of this quantity. Issues bearing on the photon energy spectrum in $B \to X_s + γ$ are also discussed. The CKM-suppressed decays $B \to X_d + γ$, $B^\pm \to ρ^\pm + γ$, and $B^{0} \to (ρ^{0}, ω) + γ$ are reviewed with particular emphasis on the long-distance contributions in the exclusive decays. The impending interest in these decays in determining the parameters of the CKM matrix is emphasized. Finally, the semileptonic decays $B \to X_s \ell^+ \ell^-$ are also discussed in the context of the SM. | |
| dc.description | Latex, 19 pages (requires style file sprocl.sty). Discussion of the upper limits on $B \to X_s \ell^ \ell^-$ updated, a reference included and some typographical mistakes rectified. Invited talk; to be published in the Proceedings of the Seventh International Symposium on Heavy Flavor Physics, University of California Santa Barbara, California, July 7-11, 1997 | |
| dc.identifier | https://arxiv.org/abs/hep-ph/9709507 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/9709507 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/149084 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Theory of Rare B Decays | |
| dc.type | text |