TY - JOUR
T1 - Study of Λb0 and Ξb0 Decays to Λh+h′- and Evidence for CP Violation in Λb0 → Λk+K- Decays
AU - Aaij, R
AU - Abdelmotteleb, A S W
AU - Abellan Beteta, C
AU - Abudinén, F
AU - Ackernley, T
AU - Adefisoye, A A
AU - Adeva, B
AU - Adinolfi, M
AU - Adlarson, P
AU - Agapopoulou, C
AU - Aidala, C A
AU - Ajaltouni, Z
AU - Akar, S
AU - Akiba, K
AU - Albicocco, P
AU - Albrecht, J
AU - Alessio, F
AU - Alexander, M
AU - Aliouche, Z
AU - Alvarez Cartelle, P
AU - Amalric, R
AU - Amato, S
AU - Amey, J L
AU - Amhis, Y
AU - An, L
AU - Anderlini, L
AU - Andersson, M
AU - Andreianov, A
AU - Andreola, P
AU - Andreotti, M
AU - Andreou, D
AU - Anelli, A
AU - Ao, D
AU - Archilli, F
AU - Argenton, M
AU - Arguedas Cuendis, S
AU - Artamonov, A
AU - Artuso, M
AU - Aslanides, E
AU - Ataíde Da Silva, R
AU - Atzeni, M
AU - Audurier, B
AU - Bacher, D
AU - Bachiller Perea, I
AU - Bachmann, S
AU - Bachmayer, M
AU - Back, J J
AU - Baladron Rodriguez, P
AU - Balagura, V
AU - Balboni, A
AU - LHCb collaboration
AU - da silva Bolognani, Carolina
AU - Cámpora Pérez, Daniel Hugo
AU - Chiotopoulos, Xenofon
AU - de Vries, Jacco
AU - Lucio Martinez, Miriam
AU - Merk, Marcel
AU - Nicotra, Davide
AU - Onderwater, Gerco
AU - Pawley, Chris
AU - Vos, Keri
PY - 2025/3/14
Y1 - 2025/3/14
N2 - A study of Λb0 and Ξb0 decays to Λh+h′- (h(′)=π,K) is performed using pp collision data collected by the LHCb experiment during LHC Runs 1-2, corresponding to an integrated luminosity of 9 fb-1. The branching fractions for these decays are measured using the Λb0→Λc+(→Λπ+)π- decay as a control channel. The decays Λb0→Λπ+π- and Ξb0→ΛK-π+ are observed for the first time. For decay modes with sufficient signal yields, CP asymmetries are measured in the full and localized regions of the final-state phase space. Evidence is found for CP violation in the Λb0→ΛK+K- decay, interpreted as originating primarily from an asymmetric Λb0→N∗+K- decay amplitude. The measured CP asymmetries for other decays are compatible with zero.
AB - A study of Λb0 and Ξb0 decays to Λh+h′- (h(′)=π,K) is performed using pp collision data collected by the LHCb experiment during LHC Runs 1-2, corresponding to an integrated luminosity of 9 fb-1. The branching fractions for these decays are measured using the Λb0→Λc+(→Λπ+)π- decay as a control channel. The decays Λb0→Λπ+π- and Ξb0→ΛK-π+ are observed for the first time. For decay modes with sufficient signal yields, CP asymmetries are measured in the full and localized regions of the final-state phase space. Evidence is found for CP violation in the Λb0→ΛK+K- decay, interpreted as originating primarily from an asymmetric Λb0→N∗+K- decay amplitude. The measured CP asymmetries for other decays are compatible with zero.
U2 - 10.1103/PhysRevLett.134.101802
DO - 10.1103/PhysRevLett.134.101802
M3 - Article
SN - 0031-9007
VL - 134
SP - 101802
JO - Physical Review Letters
JF - Physical Review Letters
IS - 10
M1 - 101802
ER -