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Observation of $B^{+} \to p \bar{Λ} K^{+} K^{-}$ and $B^{+} \to \bar{p} Λ K^{+} K^{+}$

P.-C. Lu⁶³, M.-Z. Wang⁶³, R. Chistov^45,55, P. Chang⁶³, I. Adachi^18,14, J. K. Ahn⁴¹, H. Aihara⁸⁸, S. Al Said^81,39, D. M. Asner³ et al. (The Belle Collaboration)

D. M. Asner³, H. Atmacan⁷⁷, V. Aulchenko^4,67, T. Aushev⁵⁶, R. Ayad⁸¹, V. Babu⁸², I. Badhrees^81,38, A. M. Bakich⁸⁰, V. Bansal⁶⁹, P. Behera²⁶, C. Beleño¹³, M. Berger⁷⁸, V. Bhardwaj²², B. Bhuyan²⁴, T. Bilka⁵, J. Biswal³⁴, G. Bonvicini⁹², A. Bozek⁶⁴, M. Bračko^50,34, T. E. Browder¹⁷, L. Cao³⁶, D. Červenkov⁵, M.-C. Chang⁹⁵, V. Chekelian⁵¹, A. Chen⁶¹, B. G. Cheon¹⁶, K. Chilikin⁴⁵, K. Cho⁴⁰, S.-K. Choi¹⁵, Y. Choi⁷⁹, S. Choudhury²⁵, D. Cinabro⁹², S. Cunliffe⁸, N. Dash²³, S. Di Carlo⁴³, Z. Doležal⁵, T. V. Dong^18,14, Z. Drásal⁵, S. Eidelman^4,67,45, D. Epifanov^4,67, J. E. Fast⁶⁹, T. Ferber⁸, B. G. Fulsom⁶⁹, R. Garg⁷⁰, V. Gaur⁹¹, N. Gabyshev^4,67, A. Garmash^4,67, M. Gelb³⁶, A. Giri²⁵, P. Goldenzweig³⁶, E. Guido³², J. Haba^18,14, K. Hayasaka⁶⁶, H. Hayashii⁶⁰, S. Hirose⁵⁷, W.-S. Hou⁶³, C.-L. Hsu⁵², T. Iijima^58,57, K. Inami⁵⁷, G. Inguglia⁸, A. Ishikawa⁸⁶, R. Itoh^18,14, M. Iwasaki⁶⁸, Y. Iwasaki¹⁸, W. W. Jacobs²⁷, H. B. Jeon⁴², S. Jia², Y. Jin⁸⁸, D. Joffe³⁷, K. K. Joo⁶, T. Julius⁵², A. B. Kaliyar²⁶, T. Kawasaki⁶⁶, H. Kichimi¹⁸, C. Kiesling⁵¹, D. Y. Kim⁷⁶, H. J. Kim⁴², J. B. Kim⁴¹, K. T. Kim⁴¹, S. H. Kim¹⁶, K. Kinoshita⁷, P. Kodyš⁵, S. Korpar^50,34, D. Kotchetkov¹⁷, P. Križan^46,34, R. Kroeger⁵³, P. Krokovny^4,67, T. Kuhr⁴⁷, R. Kulasiri³⁷, A. Kuzmin^4,67, Y.-J. Kwon⁹⁴, Y.-T. Lai¹⁸, J. S. Lange¹¹, I. S. Lee¹⁶, S. C. Lee⁴², L. K. Li²⁸, Y. B. Li⁷¹, L. Li Gioi⁵¹, J. Libby²⁶, D. Liventsev^91,18, M. Lubej³⁴, T. Luo¹⁰, M. Masuda⁸⁷, T. Matsuda⁵⁴, D. Matvienko^4,67,45, M. Merola^31,59, K. Miyabayashi⁶⁰, H. Miyata⁶⁶, R. Mizuk^45,55,56, G. B. Mohanty⁸², H. K. Moon⁴¹, T. Mori⁵⁷, R. Mussa³², M. Nakao^18,14, T. Nanut³⁴, K. J. Nath²⁴, Z. Natkaniec⁶⁴, M. Nayak^92,18, N. K. Nisar⁷², S. Nishida^18,14, S. Ogawa⁸⁵, S. Okuno³⁵, H. Ono^65,66, H. Ozaki^18,14, P. Pakhlov^45,55, G. Pakhlova^45,56, B. Pal³, S. Pardi³¹, H. Park⁴², S. Paul⁸⁴, T. K. Pedlar⁴⁸, R. Pestotnik³⁴, L. E. Piilonen⁹¹, V. Popov^45,56, E. Prencipe²⁰, A. Rabusov⁸⁴, M. Ritter⁴⁷, A. Rostomyan⁸, G. Russo³¹, Y. Sakai^18,14, M. Salehi^49,47, S. Sandilya⁷, L. Santelj¹⁸, T. Sanuki⁸⁶, V. Savinov⁷², O. Schneider⁴⁴, G. Schnell^1,21, C. Schwanda²⁹, Y. Seino⁶⁶, K. Senyo⁹³, M. E. Sevior⁵², V. Shebalin^4,67, C. P. Shen², T.-A. Shibata⁸⁹, J.-G. Shiu⁶³, B. Shwartz^4,67, F. Simon^51,83, J. B. Singh⁷⁰, A. Sokolov³⁰, E. Solovieva^45,56, M. Starič³⁴, J. F. Strube⁶⁹, M. Sumihama¹², T. Sumiyoshi⁹⁰, W. Sutcliffe³⁶, M. Takizawa^75,19,73, U. Tamponi³², K. Tanida³³, F. Tenchini⁵², M. Uchida⁸⁹, T. Uglov^45,56, Y. Unno¹⁶, S. Uno^18,14, P. Urquijo⁵², Y. Usov^4,67, S. E. Vahsen¹⁷, C. Van Hulse¹, R. Van Tonder³⁶, G. Varner¹⁷, A. Vinokurova^4,67, V. Vorobyev^4,67,45, A. Vossen⁹, B. Wang⁷, C. H. Wang⁶², X. L. Wang¹⁰, M. Watanabe⁶⁶, S. Watanuki⁸⁶, E. Widmann⁷⁸, E. Won⁴¹, H. Ye⁸, J. H. Yin²⁸, C. Z. Yuan²⁸, Z. P. Zhang⁷⁴, V. Zhilich^4,67, V. Zhukova^45,55, V. Zhulanov^4,67, and A. Zupanc^46,34 (The Belle Collaboration)

¹University of the Basque Country UPV/EHU, 48080 Bilbao
²Beihang University, Beijing 100191
³Brookhaven National Laboratory, Upton, New York 11973
⁴Budker Institute of Nuclear Physics SB RAS, Novosibirsk 630090
⁵Faculty of Mathematics and Physics, Charles University, 121 16 Prague
⁶Chonnam National University, Kwangju 660-701
⁷University of Cincinnati, Cincinnati, Ohio 45221
⁸Deutsches Elektronen–Synchrotron, 22607 Hamburg
⁹Duke University, Durham, North Carolina 27708
¹⁰Key Laboratory of Nuclear Physics and Ion-beam Application (MOE) and Institute of Modern Physics, Fudan University, Shanghai 200443
¹¹Justus-Liebig-Universität Gießen, 35392 Gießen
¹²Gifu University, Gifu 501-1193
¹³II. Physikalisches Institut, Georg-August-Universität Göttingen, 37073 Göttingen
¹⁴SOKENDAI (The Graduate University for Advanced Studies), Hayama 240-0193
¹⁵Gyeongsang National University, Chinju 660-701
¹⁶Hanyang University, Seoul 133-791
¹⁷University of Hawaii, Honolulu, Hawaii 96822
¹⁸High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801
¹⁹J-PARC Branch, KEK Theory Center, High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801
²⁰Forschungszentrum Jülich, 52425 Jülich
²¹IKERBASQUE, Basque Foundation for Science, 48013 Bilbao
²²Indian Institute of Science Education and Research Mohali, SAS Nagar, 140306
²³Indian Institute of Technology Bhubaneswar, Satya Nagar 751007
²⁴Indian Institute of Technology Guwahati, Assam 781039
²⁵Indian Institute of Technology Hyderabad, Telangana 502285
²⁶Indian Institute of Technology Madras, Chennai 600036
²⁷Indiana University, Bloomington, Indiana 47408
²⁸Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049
²⁹Institute of High Energy Physics, Vienna 1050
³⁰Institute for High Energy Physics, Protvino 142281
³¹INFN—Sezione di Napoli, 80126 Napoli
³²INFN—Sezione di Torino, 10125 Torino
³³Advanced Science Research Center, Japan Atomic Energy Agency, Naka 319-1195
³⁴J. Stefan Institute, 1000 Ljubljana
³⁵Kanagawa University, Yokohama 221-8686
³⁶Institut für Experimentelle Teilchenphysik, Karlsruher Institut für Technologie, 76131 Karlsruhe
³⁷Kennesaw State University, Kennesaw, Georgia 30144
³⁸King Abdulaziz City for Science and Technology, Riyadh 11442
³⁹Department of Physics, Faculty of Science, King Abdulaziz University, Jeddah 21589
⁴⁰Korea Institute of Science and Technology Information, Daejeon 305-806
⁴¹Korea University, Seoul 136-713
⁴²Kyungpook National University, Daegu 702-701
⁴³LAL, Univ. Paris-Sud, CNRS/IN2P3, Université Paris-Saclay, Orsay
⁴⁴École Polytechnique Fédérale de Lausanne (EPFL), Lausanne 1015
⁴⁵P.N. Lebedev Physical Institute of the Russian Academy of Sciences, Moscow 119991
⁴⁶Faculty of Mathematics and Physics, University of Ljubljana, 1000 Ljubljana
⁴⁷Ludwig Maximilians University, 80539 Munich
⁴⁸Luther College, Decorah, Iowa 52101
⁴⁹University of Malaya, 50603 Kuala Lumpur
⁵⁰University of Maribor, 2000 Maribor
⁵¹Max-Planck-Institut für Physik, 80805 München
⁵²School of Physics, University of Melbourne, Victoria 3010
⁵³University of Mississippi, University, Mississippi 38677
⁵⁴University of Miyazaki, Miyazaki 889-2192
⁵⁵Moscow Physical Engineering Institute, Moscow 115409
⁵⁶Moscow Institute of Physics and Technology, Moscow Region 141700
⁵⁷Graduate School of Science, Nagoya University, Nagoya 464-8602
⁵⁸Kobayashi-Maskawa Institute, Nagoya University, Nagoya 464-8602
⁵⁹Università di Napoli Federico II, 80055 Napoli
⁶⁰Nara Women’s University, Nara 630-8506
⁶¹National Central University, Chung-li 32054
⁶²National United University, Miao Li 36003
⁶³Department of Physics, National Taiwan University, Taipei 10617
⁶⁴H. Niewodniczanski Institute of Nuclear Physics, Krakow 31-342
⁶⁵Nippon Dental University, Niigata 951-8580
⁶⁶Niigata University, Niigata 950-2181
⁶⁷Novosibirsk State University, Novosibirsk 630090
⁶⁸Osaka City University, Osaka 558-8585
⁶⁹Pacific Northwest National Laboratory, Richland, Washington 99352
⁷⁰Panjab University, Chandigarh 160014
⁷¹Peking University, Beijing 100871
⁷²University of Pittsburgh, Pittsburgh, Pennsylvania 15260
⁷³Theoretical Research Division, Nishina Center, RIKEN, Saitama 351-0198
⁷⁴University of Science and Technology of China, Hefei 230026
⁷⁵Showa Pharmaceutical University, Tokyo 194-8543
⁷⁶Soongsil University, Seoul 156-743
⁷⁷University of South Carolina, Columbia, South Carolina 29208
⁷⁸Stefan Meyer Institute for Subatomic Physics, Vienna 1090
⁷⁹Sungkyunkwan University, Suwon 440-746
⁸⁰School of Physics, University of Sydney, New South Wales 2006
⁸¹Department of Physics, Faculty of Science, University of Tabuk, Tabuk 71451
⁸²Tata Institute of Fundamental Research, Mumbai 400005
⁸³Excellence Cluster Universe, Technische Universität München, 85748 Garching
⁸⁴Department of Physics, Technische Universität München, 85748 Garching
⁸⁵Toho University, Funabashi 274-8510
⁸⁶Department of Physics, Tohoku University, Sendai 980-8578
⁸⁷Earthquake Research Institute, University of Tokyo, Tokyo 113-0032
⁸⁸Department of Physics, University of Tokyo, Tokyo 113-0033
⁸⁹Tokyo Institute of Technology, Tokyo 152-8550
⁹⁰Tokyo Metropolitan University, Tokyo 192-0397
⁹¹Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061
⁹²Wayne State University, Detroit, Michigan 48202
⁹³Yamagata University, Yamagata 990-8560
⁹⁴Yonsei University, Seoul 120-749
⁹⁵Department of Physics, Fu Jen Catholic University, Taipei 24205

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Phys. Rev. D 99, 032003 – Published 7 February, 2019

DOI: https://doi.org/10.1103/PhysRevD.99.032003

Abstract

We report the study of $B^{+} \to p \bar{Λ} K^{+} K^{-}$ and $B^{+} \to \bar{p} Λ K^{+} K^{+}$ decays using a $772 \times 10^{6} B \bar{B}$ pair data sample recorded on the $ϒ (4 S)$ resonance with the Belle detector at KEKB. The following branching fractions are measured: $B (B^{+} \to p \bar{Λ} K^{+} K^{-}) = (4.1 0_{- 0.43}^{+ 0.45} \pm 0.50) \times 10^{- 6}$ , $B (B^{+} \to \bar{p} Λ K^{+} K^{+}) = (3.7 0_{- 0.37}^{+ 0.39} \pm 0.44) \times 10^{- 6}$ , $B (η_{c} \to p \bar{Λ} K^{-} + c . c .) = ({2.83}_{- 0.34}^{+ 0.36} \pm 0.35) \times 10^{- 3}$ and $B (B^{+} \to p \bar{Λ} ϕ) = (7.95 \pm 2.09 \pm 0.77) \times 10^{- 7}$ , 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 $B (η_{c} \to Λ (1520) \bar{Λ} + c . c .) = (3.48 \pm 1.48 \pm 0.46) \times 10^{- 3}$ and $B (B^{+} \to Λ (1520) \bar{Λ} K^{+}) = (2.23 \pm 0.63 \pm 0.25) \times 10^{- 6}$ . No significant signals are found for $J / ψ \to Λ (1520) \bar{Λ} + c . c .$ and $B^{+} \to \bar{Λ} (1520) Λ K^{+}$ ; we set the 90% confidence level upper limits on their decay branching fractions as $< 1.80 \times 10^{- 3}$ and $< 2.08 \times 10^{- 6}$ , respectively.

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Phys. Rev. D 99, 032003– Published 7 February, 2019

Vol. 99, Iss. 3 — 1 February 2019

Received 27 July 2018

DOI: https://doi.org/10.1103/PhysRevD.99.032003

Published by the American Physical Society under the terms of the 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 SCOAP³.

Published by the American Physical Society

Physical Review D

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Observation of $B^{+} \to p \bar{Λ} K^{+} K^{-}$ and $B^{+} \to \bar{p} Λ K^{+} K^{+}$

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Observation of B+→pΛ¯K+K− and B+→p¯ΛK+K+

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Observation of $B^{+} \to p \bar{Λ} K^{+} K^{-}$ and $B^{+} \to \bar{p} Λ K^{+} K^{+}$