Observation of the decay Λ b 0 → pK - μ + μ - and a search for CP violation
A search for CP violation in the decay Λ b 0 → pK - μ + μ - is presented. This decay is mediated by flavour-changing neutral-current transitions in the Standard Model and is potentially sensitive to new sources of CP violation. The study is based on a data sample of proton-proton collisions recorded...
| Authors: | , , , , , , , , , , , , |
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| Format: | article |
| Status: | Published version |
| Publication Date: | 2017 |
| Country: | España |
| Institution: | Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya) |
| Repository: | Recercat. Dipósit de la Recerca de Catalunya |
| OAI Identifier: | oai:recercat.cat:2445/186410 |
| Online Access: | https://hdl.handle.net/2445/186410 |
| Access Level: | Open access |
| Keyword: | Hadrons Gran Col·lisionador d'Hadrons Física de partícules Experiments Large Hadron Collider (France and Switzerland) Particle physics |
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Observation of the decay Λ b 0 → pK - μ + μ - and a search for CP violation Camboni, Alessandro Coquereau, S. Garrido Beltrán, Lluís Gascon, D. Graciani Diaz, Ricardo Marin Benito, Carla Picatoste Olloqui, Eduardo Rives Molina, Vicente José Alfonso Albero, Alejandro Calvo Gomez, M. Gironella Gironell, P. Vazquez Gomez, R. LHCb Collaboration Hadrons Gran Col·lisionador d'Hadrons Física de partícules Experiments Large Hadron Collider (France and Switzerland) Particle physics A search for CP violation in the decay Λ b 0 → pK - μ + μ - is presented. This decay is mediated by flavour-changing neutral-current transitions in the Standard Model and is potentially sensitive to new sources of CP violation. The study is based on a data sample of proton-proton collisions recorded with the LHCb experiment, corresponding to an integrated luminosity of 3 fb-1. The Λ b 0 → pK - μ + μ - decay is observed for the first time, and two observables that are sensitive to different manifestations of CP violation are measured, Δ A_{CP}≡ A_{CP}({Λ}_b^0\to p{K}-{μ}+{μ}-)-{A}_{CP}({Λ}_b^0\to p{K}-J/ψ ) and a {a}_{CP}^{\widehat{T}- odd} , where the latter is based on asymmetries in the angle between the μ + μ - and pK - decay planes. Springer Verlag https://hdl.handle.net/2445/186410 |
| title |
Observation of the decay Λ b 0 → pK - μ + μ - and a search for CP violation |
| spellingShingle |
Observation of the decay Λ b 0 → pK - μ + μ - and a search for CP violation Camboni, Alessandro Hadrons Gran Col·lisionador d'Hadrons Física de partícules Experiments Large Hadron Collider (France and Switzerland) Particle physics |
| title_short |
Observation of the decay Λ b 0 → pK - μ + μ - and a search for CP violation |
| title_full |
Observation of the decay Λ b 0 → pK - μ + μ - and a search for CP violation |
| title_fullStr |
Observation of the decay Λ b 0 → pK - μ + μ - and a search for CP violation |
| title_full_unstemmed |
Observation of the decay Λ b 0 → pK - μ + μ - and a search for CP violation |
| title_sort |
Observation of the decay Λ b 0 → pK - μ + μ - and a search for CP violation |
| author |
Camboni, Alessandro |
| author_facet |
Camboni, Alessandro Coquereau, S. Garrido Beltrán, Lluís Gascon, D. Graciani Diaz, Ricardo Marin Benito, Carla Picatoste Olloqui, Eduardo Rives Molina, Vicente José Alfonso Albero, Alejandro Calvo Gomez, M. Gironella Gironell, P. Vazquez Gomez, R. LHCb Collaboration |
| author_role |
author |
| author2 |
Coquereau, S. Garrido Beltrán, Lluís Gascon, D. Graciani Diaz, Ricardo Marin Benito, Carla Picatoste Olloqui, Eduardo Rives Molina, Vicente José Alfonso Albero, Alejandro Calvo Gomez, M. Gironella Gironell, P. Vazquez Gomez, R. LHCb Collaboration |
| author2_role |
author author author author author author author author author author author author |
| topic |
Hadrons Gran Col·lisionador d'Hadrons Física de partícules Experiments Large Hadron Collider (France and Switzerland) Particle physics |
| topic_facet |
Hadrons Gran Col·lisionador d'Hadrons Física de partícules Experiments Large Hadron Collider (France and Switzerland) Particle physics |
| description |
A search for CP violation in the decay Λ b 0 → pK - μ + μ - is presented. This decay is mediated by flavour-changing neutral-current transitions in the Standard Model and is potentially sensitive to new sources of CP violation. The study is based on a data sample of proton-proton collisions recorded with the LHCb experiment, corresponding to an integrated luminosity of 3 fb-1. The Λ b 0 → pK - μ + μ - decay is observed for the first time, and two observables that are sensitive to different manifestations of CP violation are measured, Δ A_{CP}≡ A_{CP}({Λ}_b^0\to p{K}-{μ}+{μ}-)-{A}_{CP}({Λ}_b^0\to p{K}-J/ψ ) and a {a}_{CP}^{\widehat{T}- odd} , where the latter is based on asymmetries in the angle between the μ + μ - and pK - decay planes. |
| publishDate |
2017 |
| format |
article |
| status_str |
publishedVersion |
| url |
https://hdl.handle.net/2445/186410 |
| eu_rights_str_mv |
openAccess |
| publisher |
Springer Verlag |
| 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_ |
1878433022302224384 |
| publishDateSort |
2017 |
| author_browse |
Alfonso Albero, Alejandro Calvo Gomez, M. Camboni, Alessandro Coquereau, S. Garrido Beltrán, Lluís Gascon, D. Gironella Gironell, P. Graciani Diaz, Ricardo LHCb Collaboration Marin Benito, Carla Picatoste Olloqui, Eduardo Rives Molina, Vicente José Vazquez Gomez, R. |
| publisherStr |
Springer Verlag |
| score |
6,924472 |