Threshold resummed spectra in B{yields}X{sub u}l{nu} decays in NLO. I

Journal Article · Tue Aug 01 00:00:00 EDT 2006 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.74.034004· OSTI ID:20869236

Aglietti, Ugo; Ferrera, Giancarlo ^[1]; Ricciardi, Giulia ^[2]

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1. Dipartimento di Fisica, Universita di Roma I 'La Sapienza', and I.N.F.N., Sezione di Roma (Italy)
2. Dipartimento di Scienze Fisiche, Universita di Napoli 'Federico II' and I.N.F.N., Sezione di Napoli (Italy)

We evaluate threshold resummed spectra in B{yields}X{sub u}l{nu} decays in next-to-leading order. We present results for the distribution in the hadronic variables E{sub X} and m{sub X}{sup 2}/E{sub X}{sup 2}, for the distribution in E{sub X} and for the distribution in E{sub X} and E{sub l}, where E{sub X} and m{sub X} are the total energy and the invariant mass of the final hadronic state X{sub u} respectively and E{sub l} is the energy of the charged lepton. We explicitly show that all these spectra (where there is no integration over the hadronic energy) can be directly related to the photon spectrum in B{yields}X{sub s}{gamma} via short-distance coefficient functions.

• OSTI ID: 20869236
• Journal Information: Physical Review. D, Particles Fields, Vol. 74, Issue 3; Other Information: DOI: 10.1103/PhysRevD.74.034004; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
B MESONS
DISTRIBUTION
NEUTRINOS
PARTICLE DECAY
PHOTONS
REST MASS