Revisiting the annihilation decay $\bar{B}_{s} \to \pi^+\pi^{-}$

It is very important to know the strength of the annihilation contribution in B charmless non-leptonic decays. The B/sub s /macronrightward arrowpi/sup positive pi; /sup negative process could serve as a good probe of the strength. We have studied the process in the QCD factorization framework. Usin...

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Detalles Bibliográficos
Autores principales: Yadong, Yang, Fang, Su, Gongru, Lu, Hongjun, Hao
Lenguaje:eng
Publicado: 2005
Materias:
Particle Physics - Phenomenology
Acceso en línea:https://dx.doi.org/10.1140/epjc/s2005-02364-0
http://cds.cern.ch/record/1004826
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author Yadong, Yang
Fang, Su
Gongru, Lu
Hongjun, Hao
author_facet Yadong, Yang
Fang, Su
Gongru, Lu
Hongjun, Hao
author_sort Yadong, Yang
collection CERN
description It is very important to know the strength of the annihilation contribution in B charmless non-leptonic decays. The B/sub s /macronrightward arrowpi/sup positive pi; /sup negative process could serve as a good probe of the strength. We have studied the process in the QCD factorization framework. Using a gluon mass scale dictated by the studies of infrared behavior of gluon propagators to avoid enhancements in the soft endpoint regions, we find that the CP averaged branching ratio is about 1.24?0/sup -7/, the direct CP asymmetry C/sub pipi/ is about -0.05, while the mixing-induced CP asymmetry is quite large with the value S/sub pipi/=0.18. This process could be measured at LHC-b experiments in the near future and would deepen our understanding of the dynamics of B charmless decays.
id cern-1004826
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2005
record_format invenio
spelling cern-10048262019-09-30T06:29:59Zdoi:10.1140/epjc/s2005-02364-0http://cds.cern.ch/record/1004826engYadong, YangFang, SuGongru, LuHongjun, HaoRevisiting the annihilation decay $\bar{B}_{s} \to \pi^+\pi^{-}$Particle Physics - PhenomenologyIt is very important to know the strength of the annihilation contribution in B charmless non-leptonic decays. The B/sub s /macronrightward arrowpi/sup positive pi; /sup negative process could serve as a good probe of the strength. We have studied the process in the QCD factorization framework. Using a gluon mass scale dictated by the studies of infrared behavior of gluon propagators to avoid enhancements in the soft endpoint regions, we find that the CP averaged branching ratio is about 1.24?0/sup -7/, the direct CP asymmetry C/sub pipi/ is about -0.05, while the mixing-induced CP asymmetry is quite large with the value S/sub pipi/=0.18. This process could be measured at LHC-b experiments in the near future and would deepen our understanding of the dynamics of B charmless decays.oai:cds.cern.ch:10048262005
spellingShingle Particle Physics - Phenomenology
Yadong, Yang
Fang, Su
Gongru, Lu
Hongjun, Hao
Revisiting the annihilation decay $\bar{B}_{s} \to \pi^+\pi^{-}$
title Revisiting the annihilation decay $\bar{B}_{s} \to \pi^+\pi^{-}$
title_full Revisiting the annihilation decay $\bar{B}_{s} \to \pi^+\pi^{-}$
title_fullStr Revisiting the annihilation decay $\bar{B}_{s} \to \pi^+\pi^{-}$
title_full_unstemmed Revisiting the annihilation decay $\bar{B}_{s} \to \pi^+\pi^{-}$
title_short Revisiting the annihilation decay $\bar{B}_{s} \to \pi^+\pi^{-}$
title_sort revisiting the annihilation decay $\bar{b}_{s} \to \pi^+\pi^{-}$
topic Particle Physics - Phenomenology
url https://dx.doi.org/10.1140/epjc/s2005-02364-0
http://cds.cern.ch/record/1004826
work_keys_str_mv AT yadongyang revisitingtheannihilationdecaybarbstopipi
AT fangsu revisitingtheannihilationdecaybarbstopipi
AT gongrulu revisitingtheannihilationdecaybarbstopipi
AT hongjunhao revisitingtheannihilationdecaybarbstopipi

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