Observation of the suppressed decay Λb0 → pπ−μ+μ−
The suppressed decay Λb0 → pπ−μ+μ−, excluding the J/ψ and ψ(2S) → μ+μ− resonances, is observed for the first time with a significance of 5.5 standard deviations. The analysis is performed with proton-proton collision data corresponding to an integrated luminosity of 3 fb−1 collected with the LHCb ex...
| Main Authors: | , , , , |
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| Format: | Journal article |
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IOP Publishing
2017
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| _version_ | 1797087913481076736 |
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| author | LHCb collaboration Aaij, R Adeva, B Adinolfi, M Harnew, N |
| author_facet | LHCb collaboration Aaij, R Adeva, B Adinolfi, M Harnew, N |
| author_sort | LHCb collaboration |
| collection | OXFORD |
| description | The suppressed decay Λb0 → pπ−μ+μ−, excluding the J/ψ and ψ(2S) → μ+μ− resonances, is observed for the first time with a significance of 5.5 standard deviations. The analysis is performed with proton-proton collision data corresponding to an integrated luminosity of 3 fb−1 collected with the LHCb experiment. The Λb0 → pπ−μ+μ− branching fraction is measured relative to the Λb0 → J/ψ(→μ+μ−)pπ− branching fraction giving $\frac{\mathrm{\mathcal{B}}\left({\Lambda}_b^0\to p{\pi}^{-}{\mu}^{+}{\mu}^{-}\right)}{\mathrm{\mathcal{B}}\left({\Lambda}_b^0\to \mathrm{J}/\psi \left(\to {\mu}^{+}{\mu}^{-}\right)p{\pi}^{-}\right)}=0.044\pm 0.012\pm 0.007,$ where the first uncertainty is statistical and the second is systematic. This is the first observation of a b → d transition in a baryonic decay. |
| first_indexed | 2024-03-07T02:42:20Z |
| format | Journal article |
| id | oxford-uuid:aae10d5e-1a9f-4b89-b5d9-e041fccb6eb7 |
| institution | University of Oxford |
| last_indexed | 2024-03-07T02:42:20Z |
| publishDate | 2017 |
| publisher | IOP Publishing |
| record_format | dspace |
| spelling | oxford-uuid:aae10d5e-1a9f-4b89-b5d9-e041fccb6eb72022-03-27T03:18:06ZObservation of the suppressed decay Λb0 → pπ−μ+μ−Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:aae10d5e-1a9f-4b89-b5d9-e041fccb6eb7Symplectic Elements at OxfordIOP Publishing2017LHCb collaborationAaij, RAdeva, BAdinolfi, MHarnew, NThe suppressed decay Λb0 → pπ−μ+μ−, excluding the J/ψ and ψ(2S) → μ+μ− resonances, is observed for the first time with a significance of 5.5 standard deviations. The analysis is performed with proton-proton collision data corresponding to an integrated luminosity of 3 fb−1 collected with the LHCb experiment. The Λb0 → pπ−μ+μ− branching fraction is measured relative to the Λb0 → J/ψ(→μ+μ−)pπ− branching fraction giving $\frac{\mathrm{\mathcal{B}}\left({\Lambda}_b^0\to p{\pi}^{-}{\mu}^{+}{\mu}^{-}\right)}{\mathrm{\mathcal{B}}\left({\Lambda}_b^0\to \mathrm{J}/\psi \left(\to {\mu}^{+}{\mu}^{-}\right)p{\pi}^{-}\right)}=0.044\pm 0.012\pm 0.007,$ where the first uncertainty is statistical and the second is systematic. This is the first observation of a b → d transition in a baryonic decay. |
| spellingShingle | LHCb collaboration Aaij, R Adeva, B Adinolfi, M Harnew, N Observation of the suppressed decay Λb0 → pπ−μ+μ− |
| title | Observation of the suppressed decay Λb0 → pπ−μ+μ− |
| title_full | Observation of the suppressed decay Λb0 → pπ−μ+μ− |
| title_fullStr | Observation of the suppressed decay Λb0 → pπ−μ+μ− |
| title_full_unstemmed | Observation of the suppressed decay Λb0 → pπ−μ+μ− |
| title_short | Observation of the suppressed decay Λb0 → pπ−μ+μ− |
| title_sort | observation of the suppressed decay λb0 pπ μ μ |
| work_keys_str_mv | AT lhcbcollaboration observationofthesuppresseddecaylb0ppmm AT aaijr observationofthesuppresseddecaylb0ppmm AT adevab observationofthesuppresseddecaylb0ppmm AT adinolfim observationofthesuppresseddecaylb0ppmm AT harnewn observationofthesuppresseddecaylb0ppmm |