Copertina

Observation of CP violation in charm decays

A search for charge-parity (CP) violation in D0→K−K+ and D0→π−π+ decays is reported, using pp collision data corresponding to an integrated luminosity of 5.9 fb−1 collected at a center-of-mass energy of 13 TeV with the LHCb detector. The flavor of the charm meson is inferred from the charge of the p...

Descrizione completa

Salvato in:
Dettagli Bibliografici
Autori principali: Aaij, Roel (Autore) , D'Argent, Philippe (Autore) , Bachmann, Sebastian (Autore) , Berninghoff, Daniel (Autore) , Borsato, Martino (Autore) , Braun, Svende (Autore) , Comerma-Montells, Albert (Autore) , Dziewiecki, Michal (Autore) , Gerick, David (Autore) , Grabowski, Jascha (Autore) , Han, Xiaoxue (Autore) , Hansmann-Menzemer, Stephanie (Autore) , Hu, Jiangqiao (Autore) , Kecke, Matthieu (Autore) , Kolpin, Michael (Autore) , Kopecná, Renata (Autore) , Leverington, Blake (Autore) , Malygina, Hanna (Autore) , Mitzel, Dominik (Autore) , Neubert, Sebastian (Autore) , Piucci, Alessio (Autore) , Skidmore, Nicola (Autore) , Stahl, Marian (Autore) , Stemmle, Simon (Autore) , Uwer, Ulrich (Autore) , Zhelezov, Alexey (Autore)
Ente Autore: LHCb Collaboration (Autore)
Natura: Article (Journal)
Lingua:inglese
Pubblicazione: 29 May 2019
In: Physical review letters
Year: 2019, Volume: 122, Fascicolo: 21
ISSN:1079-7114
DOI:10.1103/PhysRevLett.122.211803
Accesso online:Verlag, Volltext: https://doi.org/10.1103/PhysRevLett.122.211803
Verlag, Volltext: https://link.aps.org/doi/10.1103/PhysRevLett.122.211803
Testo
Note sull'autore:R. Aaijetal.* (LHCb Collaboration)
Descrizione
Riassunto:A search for charge-parity (CP) violation in D0→K−K+ and D0→π−π+ decays is reported, using pp collision data corresponding to an integrated luminosity of 5.9 fb−1 collected at a center-of-mass energy of 13 TeV with the LHCb detector. The flavor of the charm meson is inferred from the charge of the pion in D∗(2010)+→D0π+ decays or from the charge of the muon in ¯B→D0μ−¯νμX decays. The difference between the CP asymmetries in D0→K−K+ and D0→π−π+ decays is measured to be ΔACP=[−18.2±3.2(stat)±0.9(syst)]×10−4 for π-tagged and ΔACP=[−9±8(stat)±5(syst)]×10−4 for μ-tagged D0 mesons. Combining these with previous LHCb results leads to ΔACP=(−15.4±2.9)×10−4, where the uncertainty includes both statistical and systematic contributions. The measured value differs from zero by more than 5 standard deviations. This is the first observation of CP violation in the decay of charm hadrons.
Descrizione del documento:R. Aaij, P. d’Argent, S. Bachmann, D. Berninghoff, M. Borsato, S. Braun, A. Comerma-Montells, M. Dziewiecki, D. Gerick, J.P. Grabowski, X. Han, S. Hansmann-Menzemer, J. Hu, M. Kecke, M. Kolpin, R. Kopecna, B. Leverington, H. Malygina, D.S. Mitzel, S. Neubert, A. Piucci, N. Skidmore, M. Stahl, S. Stemmle, U. Uwer, A. Zhelezov [und weitere] (LHCb Collaboration)
Gesehen am 18.06.2019
Descrizione fisica:Online Resource
ISSN:1079-7114
DOI:10.1103/PhysRevLett.122.211803

Documenti analoghi