A data sample collected with the LHCb detector corresponding to an integrated luminosity of 9 fb−1 is used to measure eleven CP violation observables in B±→ Dh± decays, where h is either a kaon or a pion. The neutral D meson decay is reconstructed in the three-body final states: K±π∓π0; π+π−π0; K+K−π0 and the suppressed π±K∓π0 combination. The mode where a large CP asymmetry is expected, B±→ [π±K∓π0]DK±, is observed with a significance greater than seven standard deviations. The ratio of the partial width of this mode relative to that of the favoured mode, B±→ [K±π∓π0]DK±, is RADS(K) = (1.27 ± 0.16 ± 0.02) × 10−2. Evidence for a large CP asymmetry is also seen: AADS(K) = −0.38 ± 0.12 ± 0.02. Constraints on the CKM angle γ are calculated from the eleven reported observables. [Figure not available: see fulltext.]

Aaij, R., Abdelmotteleb, A., Abellan Beteta, C., Abudinen Gallego, F., Ackernley, T., Adeva, B., et al. (2022). Constraints on the CKM angle γ from B ± → Dh ± decays using D → h ± h′∓ π 0 final states. JOURNAL OF HIGH ENERGY PHYSICS, 2022(7) [10.1007/JHEP07(2022)099].

Constraints on the CKM angle γ from B ± → Dh ± decays using D → h ± h′∓ π 0 final states

Borsato M.;Calvi M.;Capelli S.;Carniti P.;Fazzini D.;Gotti C.;Martinazzoli L.;Martinelli M.;Matteuzzi C.;Minotti A.;Petruzzo M.;Pizzichemi M.;Salomoni M.;Shields E. B.;
2022

Abstract

A data sample collected with the LHCb detector corresponding to an integrated luminosity of 9 fb−1 is used to measure eleven CP violation observables in B±→ Dh± decays, where h is either a kaon or a pion. The neutral D meson decay is reconstructed in the three-body final states: K±π∓π0; π+π−π0; K+K−π0 and the suppressed π±K∓π0 combination. The mode where a large CP asymmetry is expected, B±→ [π±K∓π0]DK±, is observed with a significance greater than seven standard deviations. The ratio of the partial width of this mode relative to that of the favoured mode, B±→ [K±π∓π0]DK±, is RADS(K) = (1.27 ± 0.16 ± 0.02) × 10−2. Evidence for a large CP asymmetry is also seen: AADS(K) = −0.38 ± 0.12 ± 0.02. Constraints on the CKM angle γ are calculated from the eleven reported observables. [Figure not available: see fulltext.]
Articolo in rivista - Articolo scientifico
B Physics; CKM Angle Gamma; CP Violation; Hadron-Hadron Scattering
English
2022
2022
7
99
open
Aaij, R., Abdelmotteleb, A., Abellan Beteta, C., Abudinen Gallego, F., Ackernley, T., Adeva, B., et al. (2022). Constraints on the CKM angle γ from B ± → Dh ± decays using D → h ± h′∓ π 0 final states. JOURNAL OF HIGH ENERGY PHYSICS, 2022(7) [10.1007/JHEP07(2022)099].
File in questo prodotto:
File Dimensione Formato  
10281-403038_VoR.pdf

accesso aperto

Tipologia di allegato: Publisher’s Version (Version of Record, VoR)
Licenza: Creative Commons
Dimensione 1.38 MB
Formato Adobe PDF
1.38 MB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/403038
Citazioni
  • Scopus 6
  • ???jsp.display-item.citation.isi??? 4
Social impact