First observation of the decay $B_s^0 \rightarrow φ\bar{K}^{*0}$
The first observation of the decay $B_s^0 \rightarrow \phi \bar{K}^{*0}$ is reported. The analysis is based on a data sample corresponding to an integrated luminosity of 1.0 fb$^{-1}$ of $pp$ collisions at $\sqrt{s} = 7 TeV$, collected with the LHCb detector. A yield of $30 \pm 6$ $B_s^0 \rightarrow...
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Journal article |
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2013
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| _version_ | 1797080373479342080 |
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| author | collaboration, L Aaij, R Beteta, C Adeva, B Adinolfi, M Adrover, C Affolder, A Ajaltouni, Z Albrecht, J Alessio, F Alexander, M Ali, S Alkhazov, G Cartelle, P Jr, A Amato, S Amerio, S Amhis, Y Anderlini, L Anderson, J Andreassen, R Appleby, R Gutierrez, O Archilli, F Artamonov, A |
| author_facet | collaboration, L Aaij, R Beteta, C Adeva, B Adinolfi, M Adrover, C Affolder, A Ajaltouni, Z Albrecht, J Alessio, F Alexander, M Ali, S Alkhazov, G Cartelle, P Jr, A Amato, S Amerio, S Amhis, Y Anderlini, L Anderson, J Andreassen, R Appleby, R Gutierrez, O Archilli, F Artamonov, A |
| author_sort | collaboration, L |
| collection | OXFORD |
| description | The first observation of the decay $B_s^0 \rightarrow \phi \bar{K}^{*0}$ is reported. The analysis is based on a data sample corresponding to an integrated luminosity of 1.0 fb$^{-1}$ of $pp$ collisions at $\sqrt{s} = 7 TeV$, collected with the LHCb detector. A yield of $30 \pm 6$ $B_s^0 \rightarrow (K^+K^-)(K^-\pi^+)$ decays is found in the mass windows $1012.5 < M(K^+K^-) < 1026.5 MeV/c^2$ and $746 < M(K^-\pi^+)< 1046 MeV/c^2$. The signal yield is found to be dominated by $B_s^0 \rightarrow \phi \bar{K}^{*0}$ decays, and the corresponding branching fraction is measured to be ${\cal B}(B_s^0 \rightarrow \phi \bar{K}^{*0}) = (1.10 \pm 0.24 (stat) \pm 0.14 (syst) \pm 0.08 (f_d/f_s)) \times 10^{-6}$, where the uncertainties are statistical, systematic and from the ratio of fragmentation fractions $f_d/f_s$ which accounts for the different production rate of $B^0$ and $B_s^0$ mesons. The significance of $B_s^0 \rightarrow \phi \bar{K}^{*0}$ signal is 6.1 standard deviations. The fraction of longitudinal polarization in $B_s^0 \rightarrow \phi \bar{K}^{*0}$ decays is found to be $f_0 = 0.51 \pm 0.15 (stat) \pm 0.07 (syst)$. |
| first_indexed | 2024-03-07T00:59:05Z |
| format | Journal article |
| id | oxford-uuid:89199af1-5e89-4469-a04e-e7bf2308000b |
| institution | University of Oxford |
| last_indexed | 2024-03-07T00:59:05Z |
| publishDate | 2013 |
| record_format | dspace |
| spelling | oxford-uuid:89199af1-5e89-4469-a04e-e7bf2308000b2022-03-26T22:22:10ZFirst observation of the decay $B_s^0 \rightarrow φ\bar{K}^{*0}$Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:89199af1-5e89-4469-a04e-e7bf2308000bSymplectic Elements at Oxford2013collaboration, LAaij, RBeteta, CAdeva, BAdinolfi, MAdrover, CAffolder, AAjaltouni, ZAlbrecht, JAlessio, FAlexander, MAli, SAlkhazov, GCartelle, PJr, AAmato, SAmerio, SAmhis, YAnderlini, LAnderson, JAndreassen, RAppleby, RGutierrez, OArchilli, FArtamonov, AThe first observation of the decay $B_s^0 \rightarrow \phi \bar{K}^{*0}$ is reported. The analysis is based on a data sample corresponding to an integrated luminosity of 1.0 fb$^{-1}$ of $pp$ collisions at $\sqrt{s} = 7 TeV$, collected with the LHCb detector. A yield of $30 \pm 6$ $B_s^0 \rightarrow (K^+K^-)(K^-\pi^+)$ decays is found in the mass windows $1012.5 < M(K^+K^-) < 1026.5 MeV/c^2$ and $746 < M(K^-\pi^+)< 1046 MeV/c^2$. The signal yield is found to be dominated by $B_s^0 \rightarrow \phi \bar{K}^{*0}$ decays, and the corresponding branching fraction is measured to be ${\cal B}(B_s^0 \rightarrow \phi \bar{K}^{*0}) = (1.10 \pm 0.24 (stat) \pm 0.14 (syst) \pm 0.08 (f_d/f_s)) \times 10^{-6}$, where the uncertainties are statistical, systematic and from the ratio of fragmentation fractions $f_d/f_s$ which accounts for the different production rate of $B^0$ and $B_s^0$ mesons. The significance of $B_s^0 \rightarrow \phi \bar{K}^{*0}$ signal is 6.1 standard deviations. The fraction of longitudinal polarization in $B_s^0 \rightarrow \phi \bar{K}^{*0}$ decays is found to be $f_0 = 0.51 \pm 0.15 (stat) \pm 0.07 (syst)$. |
| spellingShingle | collaboration, L Aaij, R Beteta, C Adeva, B Adinolfi, M Adrover, C Affolder, A Ajaltouni, Z Albrecht, J Alessio, F Alexander, M Ali, S Alkhazov, G Cartelle, P Jr, A Amato, S Amerio, S Amhis, Y Anderlini, L Anderson, J Andreassen, R Appleby, R Gutierrez, O Archilli, F Artamonov, A First observation of the decay $B_s^0 \rightarrow φ\bar{K}^{*0}$ |
| title | First observation of the decay $B_s^0 \rightarrow φ\bar{K}^{*0}$ |
| title_full | First observation of the decay $B_s^0 \rightarrow φ\bar{K}^{*0}$ |
| title_fullStr | First observation of the decay $B_s^0 \rightarrow φ\bar{K}^{*0}$ |
| title_full_unstemmed | First observation of the decay $B_s^0 \rightarrow φ\bar{K}^{*0}$ |
| title_short | First observation of the decay $B_s^0 \rightarrow φ\bar{K}^{*0}$ |
| title_sort | first observation of the decay b s 0 rightarrow φ bar k 0 |
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