Study of charm mixing and CP violation with D0→ K±π∓π±π∓ decays
A study of charm mixing and CP violation in D0 → K±π∓π±π∓ decays is performed using data collected by the LHCb experiment in proton-proton collisions from 2015 to 2018, corresponding to an integrated luminosity of 6 fb−1. The ratio of promptly produced D0 → K+π−π+π− to D0 → K−π+π−π+ decay rates is m...
| Autores: | , , , |
|---|---|
| Tipo de recurso: | artículo |
| Fecha de publicación: | 2025 |
| País: | España |
| Institución: | Universitat Ramon Llull (URL) |
| Repositorio: | DAU Arxiu Digital de la Universitat Ramon Llull |
| OAI Identifier: | oai:dau.url.edu:20.500.14342/5970 |
| Acceso en línea: | http://hdl.handle.net/20.500.14342/5970 https://doi.org/10.1007/JHEP12(2025)153 |
| Access Level: | acceso abierto |
| Palabra clave: | Charm physics CP violation Flavour physics Hadron-hadron scattering Gran col·lisionador d'hadrons (França i Suïssa) 530.1 539 |
| id |
ES_3ee46f3c37b95ab4ba1a9c87f9bc2cb1 |
|---|---|
| oai_identifier_str |
oai:dau.url.edu:20.500.14342/5970 |
| network_acronym_str |
ES |
| network_name_str |
España |
| repository_id_str |
|
| spelling |
Study of charm mixing and CP violation with D0→ K±π∓π±π∓ decaysCalvo Gomez, MiriamGolobardes Ribé, ElisabetVilasis-Cardona, XavierLHCb Collaboration - CERNCharm physicsCP violationFlavour physicsHadron-hadron scatteringGran col·lisionador d'hadrons (França i Suïssa)530.1539A study of charm mixing and CP violation in D0 → K±π∓π±π∓ decays is performed using data collected by the LHCb experiment in proton-proton collisions from 2015 to 2018, corresponding to an integrated luminosity of 6 fb−1. The ratio of promptly produced D0 → K+π−π+π− to D0 → K−π+π−π+ decay rates is measured as a function of D0 decay time, both inclusive over phase space and in bins of phase space. Taking external inputs for the D0−D¯0 mixing parameters x and y allows constraints to be obtained on the hadronic parameters of the charm decay. When combined with previous measurements from charm-threshold experiments and at LHCb, improved knowledge is obtained for these parameters, which is valuable for studies of the angle γ of the Unitarity Triangle. An alternative analysis is also performed, in which external inputs are taken for the hadronic parameters, and the mixing parameters are determined, including ∆x and ∆y, which are nonzero in the presence of CP violation. It is found that x=0.85−0.24+0.15%, y=0.21−0.27+0.29%, ∆x = (−0.02 ± 0.04) % and Δy=0.02−0.03+0.04%. These results are consistent with previous measurements and the hypothesis of CP conservation.info:eu-repo/semantics/publishedVersionSpringerUniversitat Ramon Llull. La SalleCERN2026202620252025info:eu-repo/semantics/article39 p.application/pdfhttp://hdl.handle.net/20.500.14342/5970https://doi.org/10.1007/JHEP12(2025)153reponame:DAU Arxiu Digital de la Universitat Ramon Llullinstname:Universitat Ramon Llull (URL)InglésJournal of High Energy Physics. 2025. Vol. 2025, 153© CERNAttribution 4.0 Internationalhttp://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccessoai:dau.url.edu:20.500.14342/59702026-06-21T06:40:37Z |
| dc.title.none.fl_str_mv |
Study of charm mixing and CP violation with D0→ K±π∓π±π∓ decays |
| title |
Study of charm mixing and CP violation with D0→ K±π∓π±π∓ decays |
| spellingShingle |
Study of charm mixing and CP violation with D0→ K±π∓π±π∓ decays Calvo Gomez, Miriam Charm physics CP violation Flavour physics Hadron-hadron scattering Gran col·lisionador d'hadrons (França i Suïssa) 530.1 539 |
| title_short |
Study of charm mixing and CP violation with D0→ K±π∓π±π∓ decays |
| title_full |
Study of charm mixing and CP violation with D0→ K±π∓π±π∓ decays |
| title_fullStr |
Study of charm mixing and CP violation with D0→ K±π∓π±π∓ decays |
| title_full_unstemmed |
Study of charm mixing and CP violation with D0→ K±π∓π±π∓ decays |
| title_sort |
Study of charm mixing and CP violation with D0→ K±π∓π±π∓ decays |
| dc.creator.none.fl_str_mv |
Calvo Gomez, Miriam Golobardes Ribé, Elisabet Vilasis-Cardona, Xavier LHCb Collaboration - CERN |
| author |
Calvo Gomez, Miriam |
| author_facet |
Calvo Gomez, Miriam Golobardes Ribé, Elisabet Vilasis-Cardona, Xavier LHCb Collaboration - CERN |
| author_role |
author |
| author2 |
Golobardes Ribé, Elisabet Vilasis-Cardona, Xavier LHCb Collaboration - CERN |
| author2_role |
author author author |
| dc.contributor.none.fl_str_mv |
Universitat Ramon Llull. La Salle CERN |
| dc.subject.none.fl_str_mv |
Charm physics CP violation Flavour physics Hadron-hadron scattering Gran col·lisionador d'hadrons (França i Suïssa) 530.1 539 |
| topic |
Charm physics CP violation Flavour physics Hadron-hadron scattering Gran col·lisionador d'hadrons (França i Suïssa) 530.1 539 |
| description |
A study of charm mixing and CP violation in D0 → K±π∓π±π∓ decays is performed using data collected by the LHCb experiment in proton-proton collisions from 2015 to 2018, corresponding to an integrated luminosity of 6 fb−1. The ratio of promptly produced D0 → K+π−π+π− to D0 → K−π+π−π+ decay rates is measured as a function of D0 decay time, both inclusive over phase space and in bins of phase space. Taking external inputs for the D0−D¯0 mixing parameters x and y allows constraints to be obtained on the hadronic parameters of the charm decay. When combined with previous measurements from charm-threshold experiments and at LHCb, improved knowledge is obtained for these parameters, which is valuable for studies of the angle γ of the Unitarity Triangle. An alternative analysis is also performed, in which external inputs are taken for the hadronic parameters, and the mixing parameters are determined, including ∆x and ∆y, which are nonzero in the presence of CP violation. It is found that x=0.85−0.24+0.15%, y=0.21−0.27+0.29%, ∆x = (−0.02 ± 0.04) % and Δy=0.02−0.03+0.04%. These results are consistent with previous measurements and the hypothesis of CP conservation. |
| publishDate |
2025 |
| dc.date.none.fl_str_mv |
2025 2025 2026 2026 |
| dc.type.none.fl_str_mv |
info:eu-repo/semantics/article |
| format |
article |
| dc.identifier.none.fl_str_mv |
http://hdl.handle.net/20.500.14342/5970 https://doi.org/10.1007/JHEP12(2025)153 |
| url |
http://hdl.handle.net/20.500.14342/5970 https://doi.org/10.1007/JHEP12(2025)153 |
| dc.language.none.fl_str_mv |
Inglés |
| language_invalid_str_mv |
Inglés |
| dc.relation.none.fl_str_mv |
Journal of High Energy Physics. 2025. Vol. 2025, 153 |
| dc.rights.none.fl_str_mv |
© CERN Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ info:eu-repo/semantics/openAccess |
| rights_invalid_str_mv |
© CERN Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ |
| eu_rights_str_mv |
openAccess |
| dc.format.none.fl_str_mv |
39 p. application/pdf |
| dc.publisher.none.fl_str_mv |
Springer |
| publisher.none.fl_str_mv |
Springer |
| dc.source.none.fl_str_mv |
reponame:DAU Arxiu Digital de la Universitat Ramon Llull instname:Universitat Ramon Llull (URL) |
| instname_str |
Universitat Ramon Llull (URL) |
| reponame_str |
DAU Arxiu Digital de la Universitat Ramon Llull |
| collection |
DAU Arxiu Digital de la Universitat Ramon Llull |
| repository.name.fl_str_mv |
|
| repository.mail.fl_str_mv |
|
| _version_ |
1869406589942759424 |
| score |
15,812429 |