Measurement of the differential branching fraction of the decay $Λ_b^0\rightarrowΛμ^+μ^-$
The differential branching fraction of the decay $\Lambda_b^0\rightarrow\Lambda\mu^+\mu^-$ is measured as a function of the square of the dimuon invariant mass, $q^2$. A yield of $78\pm12$ $\Lambda_b^0\rightarrow\Lambda\mu^+\mu^-$ decays is observed using data, corresponding to an integrated luminos...
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Journal article |
| Language: | English |
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2013
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| _version_ | 1797086126303870976 |
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| author | collaboration, L Aaij, R 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 Andrews, J Appleby, R Gutierrez, O Archilli, F Artamonov, A |
| author_facet | collaboration, L Aaij, R 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 Andrews, J Appleby, R Gutierrez, O Archilli, F Artamonov, A |
| author_sort | collaboration, L |
| collection | OXFORD |
| description | The differential branching fraction of the decay $\Lambda_b^0\rightarrow\Lambda\mu^+\mu^-$ is measured as a function of the square of the dimuon invariant mass, $q^2$. A yield of $78\pm12$ $\Lambda_b^0\rightarrow\Lambda\mu^+\mu^-$ decays is observed using data, corresponding to an integrated luminosity of 1.0\,fb$^{-1}$, collected by the LHCb experiment at a centre-of-mass energy of 7\,TeV. A significant signal is found in the $q^2$ region above the square of the $J/\psi$ mass, while at lower-$q^2$ values upper limits are set on the differential branching fraction. Integrating the differential branching fraction over $q^2$, while excluding the $J/\psi$ and $\psi(2S)$ regions, gives a branching fraction of $\BF($\Lambda_b^0\rightarrow\Lambda\mu^+\mu^-$)=(0.96\pm 0.16\stat\pm 0.13\syst\pm 0.21 (\mathrm{norm}))\times 10^{-6}$, where the uncertainties are statistical, systematic and due to the normalisation mode, $$\Lambda_b^0\rightarrow J/psi\Lambda$, respectively. |
| first_indexed | 2024-03-07T02:17:36Z |
| format | Journal article |
| id | oxford-uuid:a2cd13b5-668f-4f17-9ab6-69fcd258bd51 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T02:17:36Z |
| publishDate | 2013 |
| record_format | dspace |
| spelling | oxford-uuid:a2cd13b5-668f-4f17-9ab6-69fcd258bd512022-03-27T02:22:31ZMeasurement of the differential branching fraction of the decay $Λ_b^0\rightarrowΛμ^+μ^-$Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:a2cd13b5-668f-4f17-9ab6-69fcd258bd51EnglishSymplectic Elements at Oxford2013collaboration, LAaij, RAdeva, BAdinolfi, MAdrover, CAffolder, AAjaltouni, ZAlbrecht, JAlessio, FAlexander, MAli, SAlkhazov, GCartelle, PJr, AAmato, SAmerio, SAmhis, YAnderlini, LAnderson, JAndreassen, RAndrews, JAppleby, RGutierrez, OArchilli, FArtamonov, AThe differential branching fraction of the decay $\Lambda_b^0\rightarrow\Lambda\mu^+\mu^-$ is measured as a function of the square of the dimuon invariant mass, $q^2$. A yield of $78\pm12$ $\Lambda_b^0\rightarrow\Lambda\mu^+\mu^-$ decays is observed using data, corresponding to an integrated luminosity of 1.0\,fb$^{-1}$, collected by the LHCb experiment at a centre-of-mass energy of 7\,TeV. A significant signal is found in the $q^2$ region above the square of the $J/\psi$ mass, while at lower-$q^2$ values upper limits are set on the differential branching fraction. Integrating the differential branching fraction over $q^2$, while excluding the $J/\psi$ and $\psi(2S)$ regions, gives a branching fraction of $\BF($\Lambda_b^0\rightarrow\Lambda\mu^+\mu^-$)=(0.96\pm 0.16\stat\pm 0.13\syst\pm 0.21 (\mathrm{norm}))\times 10^{-6}$, where the uncertainties are statistical, systematic and due to the normalisation mode, $$\Lambda_b^0\rightarrow J/psi\Lambda$, respectively. |
| spellingShingle | collaboration, L Aaij, R 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 Andrews, J Appleby, R Gutierrez, O Archilli, F Artamonov, A Measurement of the differential branching fraction of the decay $Λ_b^0\rightarrowΛμ^+μ^-$ |
| title | Measurement of the differential branching fraction of the decay
$Λ_b^0\rightarrowΛμ^+μ^-$ |
| title_full | Measurement of the differential branching fraction of the decay
$Λ_b^0\rightarrowΛμ^+μ^-$ |
| title_fullStr | Measurement of the differential branching fraction of the decay
$Λ_b^0\rightarrowΛμ^+μ^-$ |
| title_full_unstemmed | Measurement of the differential branching fraction of the decay
$Λ_b^0\rightarrowΛμ^+μ^-$ |
| title_short | Measurement of the differential branching fraction of the decay
$Λ_b^0\rightarrowΛμ^+μ^-$ |
| title_sort | measurement of the differential branching fraction of the decay λ b 0 rightarrowλμ μ |
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