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

(The Belle Collaboration)

doi:10.1103/PhysRevD.99.032003

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

(The Belle Collaboration)

National Taiwan University
RAS - P.N. Lebedev Physics Institute
Moscow Engineering Physics Institute
The Graduate University for Advanced Studies
High Energy Accelerator Research Organization, Tsukuba
Korea University
The University of Tokyo
King Abdulaziz University
University of Tabuk
Brookhaven National Laboratory
University of South Carolina
RAS - Budker Institute of Nuclear Physics
Novosibirsk State University
Moscow Institute of Physics and Technology
Tata Institute of Fundamental Research
King Abdulaziz City for Science and Technology
The University of Sydney
Pacific Northwest National Laboratory
Indian Institute of Technology Madras
University of Göttingen
Austrian Academy of Sciences
Indian Institute of Science Education and Research Mohali
Indian Institute of Technology Guwahati
Charles University
Jožef Stefan Institute
Wayne State University
H. Niewodniczanski Institute of Nuclear Physics
University of Maribor
University of Hawai'i at Mānoa
Karlsruhe Institute of Technology
Fu Jen Catholic University
Max Planck Institute for Physics (Werner Heisenberg Institute)
National Central University
Hanyang University
Korea Institute of Science and Technology Information
Gyeongsang National University
Sungkyunkwan University
Indian Institute of Technology Hyderabad
German Electron Synchrotron
Indian Institute of Technology Bhubaneswar
Université Paris-Sud

Research output: Contribution to journal › Article › peer-review

6 Scopus citations

Abstract

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.

Original language	English
Article number	032003
Journal	Physical Review D
Volume	99
Issue number	3
DOIs	https://doi.org/10.1103/PhysRevD.99.032003
State	Published - 1 Feb 2019

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10.1103/PhysRevD.99.032003

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@article{69f634a7705e43be9f52ec8d1d1e1990,

title = "Observation of B+ →p Λ{\= } K+K- and B+ → p{\= } Λk+K+ OBSERVATION of ... P.-C. LU et al.",

abstract = "We report the study of B+→p{\=Λ}K+K- and B+→{\=p}ΛK+K+ decays using a 772×106 B{\=B} pair data sample recorded on the {\"I} (4S) resonance with the Belle detector at KEKB. The following branching fractions are measured: B(B+→p{\=Λ}K+K-)=(4.10-0.43+0.45±0.50)×10-6, B(B+→{\=p}ΛK+K+)=(3.70-0.37+0.39±0.44)×10-6, B(ηc→p{\=Λ}K-+c.c.)=(2.83-0.34+0.36±0.35)×10-3 and B(B+→p{\=Λ}φ)=(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){\=Λ}+c.c.)=(3.48±1.48±0.46)×10-3 and B(B+→Λ(1520){\=Λ}K+)=(2.23±0.63±0.25)×10-6. No significant signals are found for J/ψ→Λ(1520){\=Λ}+c.c. and B+→{\=Λ}(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.",

author = "\{(The Belle Collaboration)\} and Lu, \{P. C.\} and Wang, \{M. Z.\} and R. Chistov and P. Chang and I. Adachi and Ahn, \{J. K.\} and H. Aihara and \{Al Said\}, S. and Asner, \{D. M.\} and H. Atmacan and V. Aulchenko and T. Aushev and R. Ayad and V. Babu and I. Badhrees and Bakich, \{A. M.\} and V. Bansal and P. Behera and C. Bele{\~n}o and M. Berger and V. Bhardwaj and B. Bhuyan and T. Bilka and J. Biswal and G. Bonvicini and A. Bozek and M. Bra{\v c}ko and Browder, \{T. E.\} and L. Cao and D. {\v C}ervenkov and Chang, \{M. C.\} and V. Chekelian and A. Chen and Cheon, \{B. G.\} and K. Chilikin and K. Cho and Choi, \{S. K.\} and Y. Choi and S. Choudhury and D. Cinabro and S. Cunliffe and N. Dash and \{Di Carlo\}, S. and Z. Dole{\v Z}al and Dong, \{T. V.\} and Z. Dr{\'a}sal and S. Eidelman and D. Epifanov and Kim, \{H. J.\} and H. Park",

note = "Publisher Copyright: {\textcopyright} 2019 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the https://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP.",

year = "2019",

month = feb,

day = "1",

doi = "10.1103/PhysRevD.99.032003",

language = "English",

volume = "99",

journal = "Physical Review D",

issn = "2470-0010",

publisher = "American Physical Society",

number = "3",

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TY - JOUR

T1 - Observation of B+ →p Λ ̄ K+K- and B+ → p ̄ Λk+K+ OBSERVATION of ... P.-C. LU et al.

AU - (The Belle Collaboration)

AU - Lu, P. C.

AU - Wang, M. Z.

AU - Chistov, R.

AU - Chang, P.

AU - Adachi, I.

AU - Ahn, J. K.

AU - Aihara, H.

AU - Al Said, S.

AU - Asner, D. M.

AU - Atmacan, H.

AU - Aulchenko, V.

AU - Aushev, T.

AU - Ayad, R.

AU - Babu, V.

AU - Badhrees, I.

AU - Bakich, A. M.

AU - Bansal, V.

AU - Behera, P.

AU - Beleño, C.

AU - Berger, M.

AU - Bhardwaj, V.

AU - Bhuyan, B.

AU - Bilka, T.

AU - Biswal, J.

AU - Bonvicini, G.

AU - Bozek, A.

AU - Bračko, M.

AU - Browder, T. E.

AU - Cao, L.

AU - Červenkov, D.

AU - Chang, M. C.

AU - Chekelian, V.

AU - Chen, A.

AU - Cheon, B. G.

AU - Chilikin, K.

AU - Cho, K.

AU - Choi, S. K.

AU - Choi, Y.

AU - Choudhury, S.

AU - Cinabro, D.

AU - Cunliffe, S.

AU - Dash, N.

AU - Di Carlo, S.

AU - DoleŽal, Z.

AU - Dong, T. V.

AU - Drásal, Z.

AU - Eidelman, S.

AU - Epifanov, D.

AU - Kim, H. J.

AU - Park, H.

N1 - Publisher Copyright: © 2019 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the https://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP.

PY - 2019/2/1

Y1 - 2019/2/1

N2 - 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.

AB - 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.

UR - https://www.scopus.com/pages/publications/85062606141

U2 - 10.1103/PhysRevD.99.032003

DO - 10.1103/PhysRevD.99.032003

M3 - Article

AN - SCOPUS:85062606141

SN - 2470-0010

VL - 99

JO - Physical Review D

JF - Physical Review D

IS - 3

M1 - 032003

ER -

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

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