Observation of a new baryon state in the Λ0bπ+π− mass spectrum
A new baryon state is observed in the Λ0bπ+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...
| Autores: | , , , , |
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| Tipo de documento: | artigo |
| Estado: | Versão publicada |
| Data de publicação: | 2020 |
| País: | España |
| Recursos: | Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya) |
| Repositório: | Recercat. Dipósit de la Recerca de Catalunya |
| OAI Identifier: | oai:recercat.cat:20.500.14342/3100 |
| Acesso em linha: | http://hdl.handle.net/20.500.14342/3100 https://doi.org/10.1007/JHEP06(2020)136 |
| Access Level: | Acceso aberto |
| Palavra-chave: | Gran col·lisionador d'hadrons (França i Suïssa) Partícules (Física nuclear) Col·lisions (Física nuclear) 539 |
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oai:recercat.cat:20.500.14342/3100 |
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España |
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Observation of a new baryon state in the Λ0bπ+π− mass spectrum Observation of a new baryon state in the Lambda_b^0 pi^+ pi^- mass spectrum Calvo Gomez, Miriam Camboni, Alessandro Golobardes Ribé, Elisabet Vilasis-Cardona, Xavier LHCb Collaboration - CERN Gran col·lisionador d'hadrons (França i Suïssa) Partícules (Física nuclear) Col·lisions (Física nuclear) 539 A new baryon state is observed in the Λ0bπ+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±0.2 MeV, Γ=72±11±2 MeV, where the first uncertainty is statistical and the second systematic. The third uncertainty for the mass is due to imprecise knowledge of the Λ0b baryon mass. The new state is consistent with the first radial excitation of the Λ0b 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. Springer http://hdl.handle.net/20.500.14342/3100 https://doi.org/10.1007/JHEP06(2020)136 |
| title |
Observation of a new baryon state in the Λ0bπ+π− mass spectrum |
| spellingShingle |
Observation of a new baryon state in the Λ0bπ+π− mass spectrum Calvo Gomez, Miriam Gran col·lisionador d'hadrons (França i Suïssa) Partícules (Física nuclear) Col·lisions (Física nuclear) 539 |
| title_short |
Observation of a new baryon state in the Λ0bπ+π− mass spectrum |
| title_full |
Observation of a new baryon state in the Λ0bπ+π− mass spectrum |
| title_fullStr |
Observation of a new baryon state in the Λ0bπ+π− mass spectrum |
| title_full_unstemmed |
Observation of a new baryon state in the Λ0bπ+π− mass spectrum |
| title_sort |
Observation of a new baryon state in the Λ0bπ+π− mass spectrum |
| author |
Calvo Gomez, Miriam |
| author_facet |
Calvo Gomez, Miriam Camboni, Alessandro Golobardes Ribé, Elisabet Vilasis-Cardona, Xavier LHCb Collaboration - CERN |
| author_role |
author |
| author2 |
Camboni, Alessandro Golobardes Ribé, Elisabet Vilasis-Cardona, Xavier LHCb Collaboration - CERN |
| author2_role |
author author author author |
| topic |
Gran col·lisionador d'hadrons (França i Suïssa) Partícules (Física nuclear) Col·lisions (Física nuclear) 539 |
| topic_facet |
Gran col·lisionador d'hadrons (França i Suïssa) Partícules (Física nuclear) Col·lisions (Física nuclear) 539 |
| description |
A new baryon state is observed in the Λ0bπ+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±0.2 MeV, Γ=72±11±2 MeV, where the first uncertainty is statistical and the second systematic. The third uncertainty for the mass is due to imprecise knowledge of the Λ0b baryon mass. The new state is consistent with the first radial excitation of the Λ0b 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. |
| publishDate |
2020 |
| format |
article |
| status_str |
publishedVersion |
| url |
http://hdl.handle.net/20.500.14342/3100 https://doi.org/10.1007/JHEP06(2020)136 |
| eu_rights_str_mv |
openAccess |
| publisher |
Springer |
| institution |
Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya) |
| collection |
Recercat. Dipósit de la Recerca de Catalunya |
| reponame_str |
Recercat. Dipósit de la Recerca de Catalunya |
| instname_str |
Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya) |
| _version_ |
1878436914765234176 |
| publishDateSort |
2020 |
| author_browse |
Calvo Gomez, Miriam Camboni, Alessandro Golobardes Ribé, Elisabet LHCb Collaboration - CERN Vilasis-Cardona, Xavier |
| publisherStr |
Springer |
| score |
6,924472 |