Next-to-leading order radiative corrections to the decay b --> ccs

We calculate the complete {\cal O}(\alpha_s) corrections to the quark decay b\to ccs taking full account of the quark masses, but neglecting penguin contributions. For a c to the b quark mass ratio m_c/m_b= 0.3 and a strange quark mass of 0.2\,GeV, we find that the next-to-leading order (NLO) correc...

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Detalles Bibliográficos
Autores principales: Bagan, E., Ball, Patricia, Fiol, B., Gosdzinsky, P.
Lenguaje:eng
Publicado: 1995
Materias:
Particle Physics - Phenomenology
Acceso en línea:https://dx.doi.org/10.1016/0370-2693(95)00437-P
http://cds.cern.ch/record/277219
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author Bagan, E.
Ball, Patricia
Fiol, B.
Gosdzinsky, P.
author_facet Bagan, E.
Ball, Patricia
Fiol, B.
Gosdzinsky, P.
author_sort Bagan, E.
collection CERN
description We calculate the complete {\cal O}(\alpha_s) corrections to the quark decay b\to ccs taking full account of the quark masses, but neglecting penguin contributions. For a c to the b quark mass ratio m_c/m_b= 0.3 and a strange quark mass of 0.2\,GeV, we find that the next-to-leading order (NLO) corrections increase \Gamma(b\to ccs) by (32\pm 15)\% with respect to the leading order expression, where the uncertainty is mostly due to scale- and scheme-dependences. Combining this result with the known NLO and non-perturbative corrections to other B meson decay channels we obtain an updated value for the semileptonic branching ratio of B mesons, B_{SL}, of (12.0\pm 1.4)\% using pole quark masses and (11.2\pm 1.7)\% using running \overline{\mbox{MS}} masses.
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institution Organización Europea para la Investigación Nuclear
language eng
publishDate 1995
record_format invenio
spelling cern-2772192020-07-23T02:50:01Zdoi:10.1016/0370-2693(95)00437-Phttp://cds.cern.ch/record/277219engBagan, E.Ball, PatriciaFiol, B.Gosdzinsky, P.Next-to-leading order radiative corrections to the decay b --> ccsParticle Physics - PhenomenologyWe calculate the complete {\cal O}(\alpha_s) corrections to the quark decay b\to ccs taking full account of the quark masses, but neglecting penguin contributions. For a c to the b quark mass ratio m_c/m_b= 0.3 and a strange quark mass of 0.2\,GeV, we find that the next-to-leading order (NLO) corrections increase \Gamma(b\to ccs) by (32\pm 15)\% with respect to the leading order expression, where the uncertainty is mostly due to scale- and scheme-dependences. Combining this result with the known NLO and non-perturbative corrections to other B meson decay channels we obtain an updated value for the semileptonic branching ratio of B mesons, B_{SL}, of (12.0\pm 1.4)\% using pole quark masses and (11.2\pm 1.7)\% using running \overline{\mbox{MS}} masses.We calculate the complete O ( α s ) corrections to the quark decay b → ccs taking full account of the quark masses, but neglecting penguin contributions. For a c to the b quark mass ratio m c m b = 0.3 and a strange quark mass of 0.2 GeV, we find that the next-to-leading order (NLO) corrections increase Γ ( b → ccs ) by (32 ± 15) % with respect to the leading order expression, where the uncertainty is mostly due to scale- and scheme-dependencies. Combining this result with the known NLO and non-perturbative corrections to other B meson decay channels we obtain an updated value for the semileptonic branching ratio of B mesons, B SL , of (12.0 ± 1.4) % using pole quark masses and (11.2 ± 1.7) % using running MS masses.We calculate the complete ${\cal O}(\alpha_s)$ corrections to the quark decay $b\to ccs$ taking full account of the quark masses, but neglecting penguin contributions. For a c to the b quark mass ratio $m_c/m_b= 0.3$ and a strange quark mass of $0.2\,$GeV, we find that the next-to-leading order (NLO) corrections increase $\Gamma(b\to ccs)$ by $(32\pm 15)\%$ with respect to the leading order expression, where the uncertainty is mostly due to scale- and scheme-dependences. Combining this result with the known NLO and non-perturbative corrections to other B meson decay channels we obtain an updated value for the semileptonic branching ratio of B mesons, $B_{SL}$, of $(12.0\pm 1.4)\% $ using pole quark masses and $(11.2\pm 1.7)\% $ using running $\overline{\mbox{MS}}$ masses.CERN-TH-95-25CERN-TH-95-025UAB-FT-360hep-ph/9502338CERN-TH-95-25UAB-FT-360oai:cds.cern.ch:2772191995-02-17
spellingShingle Particle Physics - Phenomenology
Bagan, E.
Ball, Patricia
Fiol, B.
Gosdzinsky, P.
Next-to-leading order radiative corrections to the decay b --> ccs
title Next-to-leading order radiative corrections to the decay b --> ccs
title_full Next-to-leading order radiative corrections to the decay b --> ccs
title_fullStr Next-to-leading order radiative corrections to the decay b --> ccs
title_full_unstemmed Next-to-leading order radiative corrections to the decay b --> ccs
title_short Next-to-leading order radiative corrections to the decay b --> ccs
title_sort next-to-leading order radiative corrections to the decay b --> ccs
topic Particle Physics - Phenomenology
url https://dx.doi.org/10.1016/0370-2693(95)00437-P
http://cds.cern.ch/record/277219
work_keys_str_mv AT bagane nexttoleadingorderradiativecorrectionstothedecaybccs
AT ballpatricia nexttoleadingorderradiativecorrectionstothedecaybccs
AT fiolb nexttoleadingorderradiativecorrectionstothedecaybccs
AT gosdzinskyp nexttoleadingorderradiativecorrectionstothedecaybccs

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