Observation of B+ →p Λ ̄ K+K- and B+ → p ̄ Λk+K+ OBSERVATION of ... P.-C. LU et al.

Journal Article (Journal Article)

We report the study of B+→pΛ̄K+K- and B+→p̄ΛK+K+ decays using a 772×106 BB̄ pair data sample recorded on the Ï (4S) resonance with the Belle detector at KEKB. The following branching fractions are measured: B(B+→pΛ̄K+K-)=(4.10-0.43+0.45±0.50)×10-6, B(B+→p̄ΛK+K+)=(3.70-0.37+0.39±0.44)×10-6, B(ηc→pΛ̄K-+c.c.)=(2.83-0.34+0.36±0.35)×10-3 and B(B+→pΛ̄φ)=(7.95±2.09±0.77)×10-7, where c.c. denotes the corresponding charge-conjugation process. The intermediate resonance decays are excluded in the four-body decay measurements. We also find evidence for B(ηc→Λ(1520)Λ̄+c.c.)=(3.48±1.48±0.46)×10-3 and B(B+→Λ(1520)Λ̄K+)=(2.23±0.63±0.25)×10-6. No significant signals are found for J/ψ→Λ(1520)Λ̄+c.c. and B+→Λ̄(1520)ΛK+; we set the 90% confidence level upper limits on their decay branching fractions as <1.80×10-3 and <2.08×10-6, respectively.

Full Text

Duke Authors

Cited Authors

  • Lu, PC; Wang, MZ; Chistov, R; Chang, P; Adachi, I; Ahn, JK; Aihara, H; Al Said, S; Asner, DM; Atmacan, H; Aulchenko, V; Aushev, T; Ayad, R; Babu, V; Badhrees, I; Bakich, AM; Bansal, V; Behera, P; Beleño, C; Berger, M; Bhardwaj, V; Bhuyan, B; Bilka, T; Biswal, J; Bonvicini, G; Bozek, A; Bračko, M; Browder, TE; Cao, L; Červenkov, D; Chang, MC; Chekelian, V; Chen, A; Cheon, BG; Chilikin, K; Cho, K; Choi, SK; Choi, Y; Choudhury, S; Cinabro, D; Cunliffe, S; Dash, N; Di Carlo, S; DoleŽal, Z; Dong, TV; Drásal, Z; Eidelman, S; Epifanov, D; Fast, JE; Ferber, T; Fulsom, BG; Garg, R; Gaur, V; Gabyshev, N; Garmash, A; Gelb, M; Giri, A; Goldenzweig, P; Guido, E; Haba, J; Hayasaka, K; Hayashii, H; Hirose, S; Hou, WS; Hsu, CL; Iijima, T; Inami, K; Inguglia, G; Ishikawa, A; Itoh, R; Iwasaki, M; Iwasaki, Y; Jacobs, WW; Jeon, HB; Jia, S; Jin, Y; Joffe, D; Joo, KK; Julius, T; Kaliyar, AB; Kawasaki, T; Kichimi, H; Kiesling, C; Kim, DY; Kim, HJ; Kim, JB; Kim, KT; Kim, SH; Kinoshita, K; Kodyš, P; Korpar, S; Kotchetkov, D; KriŽan, P; Kroeger, R; Krokovny, P; Kuhr, T; Kulasiri, R; Kuzmin, A; Kwon, YJ; Lai, YT

Published Date

  • February 1, 2019

Published In

Volume / Issue

  • 99 / 3

Electronic International Standard Serial Number (EISSN)

  • 2470-0029

International Standard Serial Number (ISSN)

  • 2470-0010

Digital Object Identifier (DOI)

  • 10.1103/PhysRevD.99.032003

Citation Source

  • Scopus