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Universality of nonperturbative QCD effects in radiative B decays

Universality of nonperturbative QCD effects in radiative B decays
Universality of nonperturbative QCD effects in radiative B decays
We demonstrate, by an explicit one-loop calculation, that at leading twist the nonperturbative effects in B → γℓν, B →  γγ and → γℓ+- radiative decays are contained in a common multiplicative factor (ΛB(Eγ), where Eγ is the energy of the photon). We argue that this result holds also at higher orders. Ratios of the amplitudes for these processes do not depend on scales below the mass of the B-meson (MB), and can be calculated as perturbative series in αs(MB).
0370-2693
213-223
Descotes-Genon, S.
a171961a-825b-4771-bd1e-60eb9f45bd87
Sachrajda, C.T.
0ed6568b-f52f-4314-8677-4aeeb925d6f7
Descotes-Genon, S.
a171961a-825b-4771-bd1e-60eb9f45bd87
Sachrajda, C.T.
0ed6568b-f52f-4314-8677-4aeeb925d6f7

Descotes-Genon, S. and Sachrajda, C.T. (2003) Universality of nonperturbative QCD effects in radiative B decays. Physics Letters B, 557 (3-4), 213-223. (doi:10.1016/S0370-2693(03)00173-4).

Record type: Article

Abstract

We demonstrate, by an explicit one-loop calculation, that at leading twist the nonperturbative effects in B → γℓν, B →  γγ and → γℓ+- radiative decays are contained in a common multiplicative factor (ΛB(Eγ), where Eγ is the energy of the photon). We argue that this result holds also at higher orders. Ratios of the amplitudes for these processes do not depend on scales below the mass of the B-meson (MB), and can be calculated as perturbative series in αs(MB).

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Published date: 3 April 2003

Identifiers

Local EPrints ID: 57168
URI: http://eprints.soton.ac.uk/id/eprint/57168
ISSN: 0370-2693
PURE UUID: dda0409f-dc95-4d21-8607-d651f7684361

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Date deposited: 14 Aug 2008
Last modified: 09 Nov 2021 09:52

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Contributors

Author: S. Descotes-Genon
Author: C.T. Sachrajda

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