Spectator interactions in B -> V gamma decays and QCD factorisation
| dc.creator | Descotes-Genon, S. | |
| dc.creator | Sachrajda, C. T. | |
| dc.date | 2004-03-29 | |
| dc.date | 2004-04-05 | |
| dc.date.accessioned | 2026-07-07T11:31:35Z | |
| dc.date.available | 2026-07-07T11:31:35Z | |
| dc.description | We study the radiative decays B -> V gamma (where V=rho, K^*) in the framework of QCD factorisation, and in particular the hard-spectator contributions to the decay amplitudes. For the phenomenologically significant chromomagnetic operator, we show by an explicit next-to-leading-order computation that the spectator interactions factorise in the heavy-quark limit, i.e. that they can be written as the convolution of a hard-scattering kernel, computable in perturbation theory, and of the light-cone distribution amplitudes for the B and V mesons which contain the soft physics. The presence of an intermediate scale of order sqrt{Lambda_QCD M_B} leads to the presence of Sudakov logarithms. We indicate how the proof of factorisation can be extended to other (four-quark) operators. | |
| dc.description | 40 pages, 18 figures | |
| dc.identifier | https://arxiv.org/abs/hep-ph/0403277 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/0403277 | |
| dc.identifier | Nucl.Phys.B693:103-133,2004 | |
| dc.identifier | doi:10.1016/j.nuclphysb.2004.06.018 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/197314 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Spectator interactions in B -> V gamma decays and QCD factorisation | |
| dc.type | text |