Observation of a new baryon state in the Λb0<sup>π+</sup><sup>π−</sup> mass spectrum
© 2020, The Author(s). A new baryon state is observed in the Λb0π+π− mass spectrum with high significance using a data sample of pp collisions, collected with the LHCb detector at centre-of-mass energies s = 7, 8 and 13 TeV, corresponding to an integrated luminosity of 9 fb−1. The mass and natural w...
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| Format: | Article |
| Language: | English |
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Springer Science and Business Media LLC
2022
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| Online Access: | https://hdl.handle.net/1721.1/142436 |
| _version_ | 1826189427826753536 |
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| author | Williams, Michael |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Williams, Michael |
| author_sort | Williams, Michael |
| collection | MIT |
| description | © 2020, The Author(s). A new baryon state is observed in the Λb0π+π− mass spectrum with high significance using a data sample of pp collisions, collected with the LHCb detector at centre-of-mass energies s = 7, 8 and 13 TeV, corresponding to an integrated luminosity of 9 fb−1. The mass and natural width of the new state are measured to be m=6072.3±2.9±0.6±0.2MeV,Γ=72±11±2MeV, where the first uncertainty is statistical and the second systematic. The third uncertainty for the mass is due to imprecise knowledge of the Λb0 baryon mass. The new state is consistent with the first radial excitation of the Λb0 baryon, the Λb(2S)0 resonance. Updated measurements of the masses and the upper limits on the natural widths of the previously observed Λb(5912)0 and Λb(5920)0 states are also reported. [Figure not available: see fulltext.] |
| first_indexed | 2024-09-23T08:14:31Z |
| format | Article |
| id | mit-1721.1/142436 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T08:14:31Z |
| publishDate | 2022 |
| publisher | Springer Science and Business Media LLC |
| record_format | dspace |
| spelling | mit-1721.1/1424362023-03-29T20:09:28Z Observation of a new baryon state in the Λb0<sup>π+</sup><sup>π−</sup> mass spectrum Williams, Michael Massachusetts Institute of Technology. Department of Physics © 2020, The Author(s). A new baryon state is observed in the Λb0π+π− mass spectrum with high significance using a data sample of pp collisions, collected with the LHCb detector at centre-of-mass energies s = 7, 8 and 13 TeV, corresponding to an integrated luminosity of 9 fb−1. The mass and natural width of the new state are measured to be m=6072.3±2.9±0.6±0.2MeV,Γ=72±11±2MeV, where the first uncertainty is statistical and the second systematic. The third uncertainty for the mass is due to imprecise knowledge of the Λb0 baryon mass. The new state is consistent with the first radial excitation of the Λb0 baryon, the Λb(2S)0 resonance. Updated measurements of the masses and the upper limits on the natural widths of the previously observed Λb(5912)0 and Λb(5920)0 states are also reported. [Figure not available: see fulltext.] 2022-05-10T13:23:14Z 2022-05-10T13:23:14Z 2020-06-01 2022-05-10T13:20:27Z Article http://purl.org/eprint/type/JournalArticle https://hdl.handle.net/1721.1/142436 Williams, Michael. 2020. "Observation of a new baryon state in the Λb0<sup>π+</sup><sup>π−</sup> mass spectrum." Journal of High Energy Physics, 2020 (6). en 10.1007/JHEP06(2020)136 Journal of High Energy Physics Creative Commons Attribution 4.0 International License https://creativecommons.org/licenses/by/4.0 application/pdf Springer Science and Business Media LLC Springer |
| spellingShingle | Williams, Michael Observation of a new baryon state in the Λb0<sup>π+</sup><sup>π−</sup> mass spectrum |
| title | Observation of a new baryon state in the Λb0<sup>π+</sup><sup>π−</sup> mass spectrum |
| title_full | Observation of a new baryon state in the Λb0<sup>π+</sup><sup>π−</sup> mass spectrum |
| title_fullStr | Observation of a new baryon state in the Λb0<sup>π+</sup><sup>π−</sup> mass spectrum |
| title_full_unstemmed | Observation of a new baryon state in the Λb0<sup>π+</sup><sup>π−</sup> mass spectrum |
| title_short | Observation of a new baryon state in the Λb0<sup>π+</sup><sup>π−</sup> mass spectrum |
| title_sort | observation of a new baryon state in the λb0 sup π sup sup π sup mass spectrum |
| url | https://hdl.handle.net/1721.1/142436 |
| work_keys_str_mv | AT williamsmichael observationofanewbaryonstateinthelb0suppsupsuppsupmassspectrum |