Determination of 2$\beta_{s}$ in $B^{0}_s \to J/\psi K^{+} K^{-}$ Decays in the Presence of a $K^{+}K^{-}$ S-Wave Contribution

We present the complete differential decay rates for the process B_s -> J/psi K^+ K^- including S-wave and P-wave angular momentum states for the K^+ K^- meson pair. We examine the effect of an S-wave component on the determination of the CP violating phase 2beta_s. Data from the B-factories indi...

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Detalles Bibliográficos
Autores principales: Xie, Yuehong, Clarke, Peter, Cowan, Greig, Muheim, Franz
Lenguaje:eng
Publicado: 2009
Materias:
Particle Physics - Phenomenology
Acceso en línea:https://dx.doi.org/10.1088/1126-6708/2009/09/074
http://cds.cern.ch/record/1202711
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author Xie, Yuehong
Clarke, Peter
Cowan, Greig
Muheim, Franz
author_facet Xie, Yuehong
Clarke, Peter
Cowan, Greig
Muheim, Franz
author_sort Xie, Yuehong
collection CERN
description We present the complete differential decay rates for the process B_s -> J/psi K^+ K^- including S-wave and P-wave angular momentum states for the K^+ K^- meson pair. We examine the effect of an S-wave component on the determination of the CP violating phase 2beta_s. Data from the B-factories indicate that an S-wave component of about 10% may be expected in the phi(1020) resonance region. We find that if this contribution is ignored in the analysis it could cause a bias in the measured value of 2beta_s towards zero of the order of 10%. When including the K^+K^- S-wave component we observe an increase in the statistical error on 2beta_s by less than 15%. We also point out the possibility of measuring the sign of cos2beta_s by using the interference between the K^+K^- S-wave and P-wave amplitudes to resolve the strong phase ambiguity. We conclude that the S-wave component can be properly taken into account in the analysis.
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institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2009
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spelling cern-12027112019-09-30T06:29:59Zdoi:10.1088/1126-6708/2009/09/074http://cds.cern.ch/record/1202711engXie, YuehongClarke, PeterCowan, GreigMuheim, FranzDetermination of 2$\beta_{s}$ in $B^{0}_s \to J/\psi K^{+} K^{-}$ Decays in the Presence of a $K^{+}K^{-}$ S-Wave ContributionParticle Physics - PhenomenologyWe present the complete differential decay rates for the process B_s -> J/psi K^+ K^- including S-wave and P-wave angular momentum states for the K^+ K^- meson pair. We examine the effect of an S-wave component on the determination of the CP violating phase 2beta_s. Data from the B-factories indicate that an S-wave component of about 10% may be expected in the phi(1020) resonance region. We find that if this contribution is ignored in the analysis it could cause a bias in the measured value of 2beta_s towards zero of the order of 10%. When including the K^+K^- S-wave component we observe an increase in the statistical error on 2beta_s by less than 15%. We also point out the possibility of measuring the sign of cos2beta_s by using the interference between the K^+K^- S-wave and P-wave amplitudes to resolve the strong phase ambiguity. We conclude that the S-wave component can be properly taken into account in the analysis.We present the complete differential decay rates for the process B_s -> J/psi K^+ K^- including S-wave and P-wave angular momentum states for the K^+ K^- meson pair. We examine the effect of an S-wave component on the determination of the CP violating phase 2beta_s. Data from the B-factories indicate that an S-wave component of about 10% may be expected in the phi(1020) resonance region. We find that if this contribution is ignored in the analysis it could cause a bias in the measured value of 2beta_s towards zero of the order of 10%. When including the K^+K^- S-wave component we observe an increase in the statistical error on 2beta_s by less than 15%. We also point out the possibility of measuring the sign of cos2beta_s by using the interference between the K^+K^- S-wave and P-wave amplitudes to resolve the strong phase ambiguity. We conclude that the S-wave component can be properly taken into account in the analysis.arXiv:0908.3627LHCB-PUB-2009-007LHCB-PUB-2009-007oai:cds.cern.ch:12027112009-08-26
spellingShingle Particle Physics - Phenomenology
Xie, Yuehong
Clarke, Peter
Cowan, Greig
Muheim, Franz
Determination of 2$\beta_{s}$ in $B^{0}_s \to J/\psi K^{+} K^{-}$ Decays in the Presence of a $K^{+}K^{-}$ S-Wave Contribution
title Determination of 2$\beta_{s}$ in $B^{0}_s \to J/\psi K^{+} K^{-}$ Decays in the Presence of a $K^{+}K^{-}$ S-Wave Contribution
title_full Determination of 2$\beta_{s}$ in $B^{0}_s \to J/\psi K^{+} K^{-}$ Decays in the Presence of a $K^{+}K^{-}$ S-Wave Contribution
title_fullStr Determination of 2$\beta_{s}$ in $B^{0}_s \to J/\psi K^{+} K^{-}$ Decays in the Presence of a $K^{+}K^{-}$ S-Wave Contribution
title_full_unstemmed Determination of 2$\beta_{s}$ in $B^{0}_s \to J/\psi K^{+} K^{-}$ Decays in the Presence of a $K^{+}K^{-}$ S-Wave Contribution
title_short Determination of 2$\beta_{s}$ in $B^{0}_s \to J/\psi K^{+} K^{-}$ Decays in the Presence of a $K^{+}K^{-}$ S-Wave Contribution
title_sort determination of 2$\beta_{s}$ in $b^{0}_s \to j/\psi k^{+} k^{-}$ decays in the presence of a $k^{+}k^{-}$ s-wave contribution
topic Particle Physics - Phenomenology
url https://dx.doi.org/10.1088/1126-6708/2009/09/074
http://cds.cern.ch/record/1202711
work_keys_str_mv AT xieyuehong determinationof2betasinb0stojpsikkdecaysinthepresenceofakkswavecontribution
AT clarkepeter determinationof2betasinb0stojpsikkdecaysinthepresenceofakkswavecontribution
AT cowangreig determinationof2betasinb0stojpsikkdecaysinthepresenceofakkswavecontribution
AT muheimfranz determinationof2betasinb0stojpsikkdecaysinthepresenceofakkswavecontribution

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