Measurement of the ratio of branching fractions $\frac{\mathcal{BR}(B^0\to K^*\gamma)}{\mathcal{BR}(B_s^0\to\phi\gamma)}$
The interest to the rare radiative decays of the B-mesons at LHCb is mostly aroused due to the measurement of the photon polarization in the $B_s^0\to\phi\gamma$ decay, which may provide a sensitive probe for the Standard Model. The LHCb experiment has started to take data at the energy of $\sqrt{s}...
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Lenguaje: | eng |
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2012
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Acceso en línea: | https://dx.doi.org/10.1051/epjconf/20122812031 http://cds.cern.ch/record/1421419 |
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author | Daria, Savrina |
author_facet | Daria, Savrina |
author_sort | Daria, Savrina |
collection | CERN |
description | The interest to the rare radiative decays of the B-mesons at LHCb is mostly aroused due to the measurement of the photon polarization in the $B_s^0\to\phi\gamma$ decay, which may provide a sensitive probe for the Standard Model. The LHCb experiment has started to take data at the energy of $\sqrt{s} = 7 TeV$ in 2010 and the current paper presents the result of the studies of the two rare radiative decays $B^0\to K^*\gamma$ and $B_s^0\to\phi\gamma$ with $340 pb^{-1}$ of data taken in the first half of 2011. With this data we have a preliminary measurement of $\frac{\mathcal{BR}(B^0\to K^*\gamma)}{\mathcal{BR}(B_s^0\to\phi\gamma)} = 1.52\pm0.14(stat.)\pm0.10(syst.)\pm0.12(f_s/f_d)$ and assuming the measured value of $\mathcal{B}(B^0\to K^*\gamma) = (4.33 \pm 0.15)\times10^{-5}$ we infer $\mathcal{B}(B_s^0\to \phi\gamma) = (2.8\pm0.5)\times10^{-5}$ \cite{bib:conf}. |
id | cern-1421419 |
institution | Organización Europea para la Investigación Nuclear |
language | eng |
publishDate | 2012 |
record_format | invenio |
spelling | cern-14214192023-02-08T21:52:49Zdoi:10.1051/epjconf/20122812031http://cds.cern.ch/record/1421419engDaria, SavrinaMeasurement of the ratio of branching fractions $\frac{\mathcal{BR}(B^0\to K^*\gamma)}{\mathcal{BR}(B_s^0\to\phi\gamma)}$Particle Physics - ExperimentThe interest to the rare radiative decays of the B-mesons at LHCb is mostly aroused due to the measurement of the photon polarization in the $B_s^0\to\phi\gamma$ decay, which may provide a sensitive probe for the Standard Model. The LHCb experiment has started to take data at the energy of $\sqrt{s} = 7 TeV$ in 2010 and the current paper presents the result of the studies of the two rare radiative decays $B^0\to K^*\gamma$ and $B_s^0\to\phi\gamma$ with $340 pb^{-1}$ of data taken in the first half of 2011. With this data we have a preliminary measurement of $\frac{\mathcal{BR}(B^0\to K^*\gamma)}{\mathcal{BR}(B_s^0\to\phi\gamma)} = 1.52\pm0.14(stat.)\pm0.10(syst.)\pm0.12(f_s/f_d)$ and assuming the measured value of $\mathcal{B}(B^0\to K^*\gamma) = (4.33 \pm 0.15)\times10^{-5}$ we infer $\mathcal{B}(B_s^0\to \phi\gamma) = (2.8\pm0.5)\times10^{-5}$ \cite{bib:conf}.The interest to the rare radiative decays of the B-mesons at LHCb is mostly aroused due to the measurement of the photon polarization in the $B_s^0\to\phi\gamma$ decay, which may provide a sensitive probe for the Standard Model. The LHCb experiment has started to take data at the energy of $\sqrt{s} = 7 TeV$ in 2010 and the current paper presents the result of the studies of the two rare radiative decays $B^0\to K^*\gamma$ and $B_s^0\to\phi\gamma$ with $340 pb^{-1}$ of data taken in the first half of 2011. With this data we have a preliminary measurement of $\frac{\mathcal{BR}(B^0\to K^*\gamma)}{\mathcal{BR}(B_s^0\to\phi\gamma)} = 1.52\pm0.14(stat.)\pm0.10(syst.)\pm0.12(f_s/f_d)$ and assuming the measured value of $\mathcal{B}(B^0\to K^*\gamma) = (4.33 \pm 0.15)\times10^{-5}$ we infer $\mathcal{B}(B_s^0\to \phi\gamma) = (2.8\pm0.5)\times10^{-5}$ \cite{bib:conf}.arXiv:1202.0410oai:cds.cern.ch:14214192012-02-03 |
spellingShingle | Particle Physics - Experiment Daria, Savrina Measurement of the ratio of branching fractions $\frac{\mathcal{BR}(B^0\to K^*\gamma)}{\mathcal{BR}(B_s^0\to\phi\gamma)}$ |
title | Measurement of the ratio of branching fractions $\frac{\mathcal{BR}(B^0\to K^*\gamma)}{\mathcal{BR}(B_s^0\to\phi\gamma)}$ |
title_full | Measurement of the ratio of branching fractions $\frac{\mathcal{BR}(B^0\to K^*\gamma)}{\mathcal{BR}(B_s^0\to\phi\gamma)}$ |
title_fullStr | Measurement of the ratio of branching fractions $\frac{\mathcal{BR}(B^0\to K^*\gamma)}{\mathcal{BR}(B_s^0\to\phi\gamma)}$ |
title_full_unstemmed | Measurement of the ratio of branching fractions $\frac{\mathcal{BR}(B^0\to K^*\gamma)}{\mathcal{BR}(B_s^0\to\phi\gamma)}$ |
title_short | Measurement of the ratio of branching fractions $\frac{\mathcal{BR}(B^0\to K^*\gamma)}{\mathcal{BR}(B_s^0\to\phi\gamma)}$ |
title_sort | measurement of the ratio of branching fractions $\frac{\mathcal{br}(b^0\to k^*\gamma)}{\mathcal{br}(b_s^0\to\phi\gamma)}$ |
topic | Particle Physics - Experiment |
url | https://dx.doi.org/10.1051/epjconf/20122812031 http://cds.cern.ch/record/1421419 |
work_keys_str_mv | AT dariasavrina measurementoftheratioofbranchingfractionsfracmathcalbrb0tokgammamathcalbrbs0tophigamma |