Evidence for the Strangeness-Changing Weak DecayΞ[subscript b][superscript −] → Λ[subscript b][superscript 0]π[superscript −]
Using a pp collision data sample corresponding to an integrated luminosity of 3.0 fb-1, collected by the LHCb detector, we present the first search for the strangeness-changing weak decay Ξb-→Λb0π-. No b hadron decay of this type has been seen before. A signal for this decay, corresponding to a sign...
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American Physical Society (APS)
2018
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| Online Access: | http://hdl.handle.net/1721.1/115548 https://orcid.org/0000-0001-5534-1732 https://orcid.org/0000-0001-8285-3346 |
| _version_ | 1811082748388966400 |
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| author | LHCb Collaboration Ilten, Philip J Williams, Michael |
| author2 | Massachusetts Institute of Technology. Laboratory for Nuclear Science |
| author_facet | Massachusetts Institute of Technology. Laboratory for Nuclear Science LHCb Collaboration Ilten, Philip J Williams, Michael |
| author_sort | LHCb Collaboration |
| collection | MIT |
| description | Using a pp collision data sample corresponding to an integrated luminosity of 3.0 fb-1, collected by the LHCb detector, we present the first search for the strangeness-changing weak decay Ξb-→Λb0π-. No b hadron decay of this type has been seen before. A signal for this decay, corresponding to a significance of 3.2 standard deviations, is reported. The relative rate is measured to be fΞb-fΛb0B(Ξb-→Λb0π-)=(5.7±1.8-0.9+0.8)×10-4,where fΞb- and fΛb0 are the b→Ξb- and b→Λb0 fragmentation fractions, and B(Ξb-→Λb0π-) is the branching fraction. Assuming fΞb-/fΛb0 is bounded between 0.1 and 0.3, the branching fraction B(Ξb-→Λb0π-) would lie in the range from (0.57±0.21)% to (0.19±0.07)%. |
| first_indexed | 2024-09-23T12:08:22Z |
| format | Article |
| id | mit-1721.1/115548 |
| institution | Massachusetts Institute of Technology |
| last_indexed | 2024-09-23T12:08:22Z |
| publishDate | 2018 |
| publisher | American Physical Society (APS) |
| record_format | dspace |
| spelling | mit-1721.1/1155482022-09-28T00:27:06Z Evidence for the Strangeness-Changing Weak DecayΞ[subscript b][superscript −] → Λ[subscript b][superscript 0]π[superscript −] LHCb Collaboration Ilten, Philip J Williams, Michael Massachusetts Institute of Technology. Laboratory for Nuclear Science Ilten, Philip J Williams, Michael Using a pp collision data sample corresponding to an integrated luminosity of 3.0 fb-1, collected by the LHCb detector, we present the first search for the strangeness-changing weak decay Ξb-→Λb0π-. No b hadron decay of this type has been seen before. A signal for this decay, corresponding to a significance of 3.2 standard deviations, is reported. The relative rate is measured to be fΞb-fΛb0B(Ξb-→Λb0π-)=(5.7±1.8-0.9+0.8)×10-4,where fΞb- and fΛb0 are the b→Ξb- and b→Λb0 fragmentation fractions, and B(Ξb-→Λb0π-) is the branching fraction. Assuming fΞb-/fΛb0 is bounded between 0.1 and 0.3, the branching fraction B(Ξb-→Λb0π-) would lie in the range from (0.57±0.21)% to (0.19±0.07)%. 2018-05-21T18:31:31Z 2018-05-21T18:31:31Z 2015-12 2015-10 2018-05-18T15:35:21Z Article http://purl.org/eprint/type/JournalArticle 0031-9007 1079-7114 http://hdl.handle.net/1721.1/115548 Aaij, R. et al. “Evidence for the Strangeness-Changing Weak DecayΞ[subscript b][superscript −] → Λ[subscript b][superscript 0]π[superscript −].” Physical Review Letters 115, 24 (December 2015) © 2015 CERN for the LHCb Collaboration. https://orcid.org/0000-0001-5534-1732 https://orcid.org/0000-0001-8285-3346 http://dx.doi.org/10.1103/PHYSREVLETT.115.241801 Physical Review Letters Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf American Physical Society (APS) American Physical Society |
| spellingShingle | LHCb Collaboration Ilten, Philip J Williams, Michael Evidence for the Strangeness-Changing Weak DecayΞ[subscript b][superscript −] → Λ[subscript b][superscript 0]π[superscript −] |
| title | Evidence for the Strangeness-Changing Weak DecayΞ[subscript b][superscript −] → Λ[subscript b][superscript 0]π[superscript −] |
| title_full | Evidence for the Strangeness-Changing Weak DecayΞ[subscript b][superscript −] → Λ[subscript b][superscript 0]π[superscript −] |
| title_fullStr | Evidence for the Strangeness-Changing Weak DecayΞ[subscript b][superscript −] → Λ[subscript b][superscript 0]π[superscript −] |
| title_full_unstemmed | Evidence for the Strangeness-Changing Weak DecayΞ[subscript b][superscript −] → Λ[subscript b][superscript 0]π[superscript −] |
| title_short | Evidence for the Strangeness-Changing Weak DecayΞ[subscript b][superscript −] → Λ[subscript b][superscript 0]π[superscript −] |
| title_sort | evidence for the strangeness changing weak decayξ subscript b superscript λ subscript b superscript 0 π superscript |
| url | http://hdl.handle.net/1721.1/115548 https://orcid.org/0000-0001-5534-1732 https://orcid.org/0000-0001-8285-3346 |
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