First Measurements of Absolute Branching Fractions of the Ξ_{c}^{0} Baryon at Belle

Li YB 1 , Shen CP 2 , Yuan CZ 3 , Adachi I 4 , Aihara H 5 , Al Said S 6 Show all authors , Asner DM 7 , Aushev T 8 , Ayad R 9 , Badhrees I 10 , Ban Y 1 , Bansal V 11 , Beleño C 12 , Berger M 13 , Bhardwaj V 14 , Bhuyan B 15 , Bilka T 16 , Biswal J 17 , Bondar A 18 , Bozek A 19 , Bračko M 17 , Cao L 20 , Červenkov D 16 , Chen A 21 , Cheon BG 22 , Chilikin K 23 , Cho K 24 , Choi SK 25 , Choi Y 26 , Cinabro D 27 , Cunliffe S 28 , Di Carlo S 29 , Doležal Z 16 , Dong TV 4 , Drásal Z 16 , Eidelman S 18 , Fast JE 11 , Fulsom BG 11 , Garg R 30 , Gaur V 31 , Gabyshev N 18 , Garmash A 18 , Giri A 32 , Goldenzweig P 20 , Greenwald D 33 , Grube B 33 , Hayasaka K 34 , Hayashii H 35 , Hsu CL 36 , Iijima T 37 , Inami K 37 , Inguglia G 28 , Ishikawa A 38 , Itoh R 4 , Iwasaki M 39 , Iwasaki Y 40 , Jacobs WW 41 , Jia S 2 , Jin Y 5 , Joffe D 42 , Joo KK 43 , Karyan G 28 , Kawasaki T 44 , Kichimi H 40 , Kim DY 45 , Kim HJ 46 , Kim JB 47 , Kim KT 47 , Kim SH 22 , Kinoshita K 48 , Kodyš P 16 , Korpar S 17 , Kotchetkov D 49 , Križan P 17 , Kroeger R 50 , Krokovny P 18 , Kumita T 51 , Kuzmin A 18 , Kwon YJ 52 , Lee JY 53 , Lee SC 46 , Li LK 3 , Li Gioi L 54 , Libby J 55 , Liventsev D 40 , Lubej M 17 , MacNaughton J 56 , Masuda M 57 , Matsuda T 56 , Merola M 58 , Miyabayashi K 35 , Miyata H 34 , Mizuk R 23 , Mohanty GB 59 , Mussa R 60 , Nakano E 39 , Nakao M 4 , Nath KJ 15 , Nayak M 40 , Niiyama M 61 , Nishida S 4 , Ono H 62 , Onuki Y 5 , Pakhlov P 23 , Pakhlova G 23 , Pal B 7 , Pardi S 58 , Park SH 52 , Paul S 33 , Pedlar TK 63 , Pestotnik R 17 , Piilonen LE 31 , Popov V 23 , Prencipe E 64 , Russo G 58 , Sakai Y 4 , Salehi M 65 , Sandilya S 48 , Santelj L 40 , Sanuki T 38 , Savinov V 66 , Schneider O 67 , Schnell G 68 , Schueler J 49 , Schwanda C 69 , Schwartz AJ 48 , Seino Y 34 , Senyo K 70 , Sevior ME 71 , Shibata TA 72 , Shiu JG 73 , Shwartz B 18 , Solovieva E 23 , Starič M 17 , Sumihama M 74 , Sumiyoshi T 51 , Sutcliffe W 20 , Takizawa M 75 , Tanida K 76 , Tao Y 77 , Tenchini F 28 , Trabelsi K 4 , Uchida M 72 , Uglov T 23 , Unno Y 22 , Uno S 4 , Urquijo P 71 , Van Tonder R 20 , Varner G 49 , Wang B 48 , Wang CH 78 , Wang MZ 73 , Wang P 3 , Wang XL 79 , Won E 47 , Yang SB 47 , Ye H 28 , Yelton J 77 , Yin JH 3 , Yusa Y 34 , Zhang ZP 80 , Zhilich V 18 , Zhukova V 23 , Belle Collaboration

Affiliations 

  • 1 Peking University, Beijing 100871
  • 2 Beihang University, Beijing 100191
  • 3 Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049
  • 4 SOKENDAI (The Graduate University for Advanced Studies), Hayama 240-0193
  • 5 Department of Physics, University of Tokyo, Tokyo 113-0033
  • 6 Department of Physics, Faculty of Science, King Abdulaziz University, Jeddah 21589
  • 7 Brookhaven National Laboratory, Upton, New York 11973
  • 8 Moscow Institute of Physics and Technology, Moscow Region 141700
  • 9 Department of Physics, Faculty of Science, University of Tabuk, Tabuk 71451
  • 10 King Abdulaziz City for Science and Technology, Riyadh 11442
  • 11 Pacific Northwest National Laboratory, Richland, Washington 99352
  • 12 II. Physikalisches Institut, Georg-August-Universität Göttingen, 37073 Göttingen
  • 13 Stefan Meyer Institute for Subatomic Physics, Vienna 1090
  • 14 Indian Institute of Science Education and Research Mohali, SAS Nagar, 140306
  • 15 Indian Institute of Technology Guwahati, Assam 781039
  • 16 Faculty of Mathematics and Physics, Charles University, 121 16 Prague
  • 17 J. Stefan Institute, 1000 Ljubljana
  • 18 Budker Institute of Nuclear Physics SB RAS, Novosibirsk 630090
  • 19 H. Niewodniczanski Institute of Nuclear Physics, Krakow 31-342
  • 20 Institut für Experimentelle Teilchenphysik, Karlsruher Institut für Technologie, 76131 Karlsruhe
  • 21 National Central University, Chung-li 32054
  • 22 Hanyang University, Seoul 133-791
  • 23 P.N. Lebedev Physical Institute of the Russian Academy of Sciences, Moscow 119991
  • 24 Korea Institute of Science and Technology Information, Daejeon 305-806
  • 25 Gyeongsang National University, Chinju 660-701
  • 26 Sungkyunkwan University, Suwon 440-746
  • 27 Wayne State University, Detroit, Michigan 48202
  • 28 Deutsches Elektronen-Synchrotron, 22607 Hamburg
  • 29 LAL, Univ. Paris-Sud, CNRS/IN2P3, Université Paris-Saclay, Orsay 91405
  • 30 Panjab University, Chandigarh 160014
  • 31 Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061
  • 32 Indian Institute of Technology Hyderabad, Telangana 502285
  • 33 Department of Physics, Technische Universität München, 85748 Garching
  • 34 Niigata University, Niigata 950-2181
  • 35 Nara Women's University, Nara 630-8506
  • 36 School of Physics, University of Sydney, New South Wales 2006
  • 37 Graduate School of Science, Nagoya University, Nagoya 464-8602
  • 38 Department of Physics, Tohoku University, Sendai 980-8578
  • 39 Osaka City University, Osaka 558-8585
  • 40 High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801
  • 41 Indiana University, Bloomington, Indiana 47408
  • 42 Kennesaw State University, Kennesaw, Georgia 30144
  • 43 Chonnam National University, Kwangju 660-701
  • 44 Kitasato University, Sagamihara 252-0373
  • 45 Soongsil University, Seoul 156-743
  • 46 Kyungpook National University, Daegu 702-701
  • 47 Korea University, Seoul 136-713
  • 48 University of Cincinnati, Cincinnati, Ohio 45221
  • 49 University of Hawaii, Honolulu, Hawaii 96822
  • 50 University of Mississippi, University, Mississippi 38677
  • 51 Tokyo Metropolitan University, Tokyo 192-0397
  • 52 Yonsei University, Seoul 120-749
  • 53 Seoul National University, Seoul 151-742
  • 54 Max-Planck-Institut für Physik, 80805 München
  • 55 Indian Institute of Technology Madras, Chennai 600036
  • 56 University of Miyazaki, Miyazaki 889-2192
  • 57 Earthquake Research Institute, University of Tokyo, Tokyo 113-0032
  • 58 INFN-Sezione di Napoli, 80126 Napoli
  • 59 Tata Institute of Fundamental Research, Mumbai 400005
  • 60 INFN-Sezione di Torino, 10125 Torino
  • 61 Kyoto University, Kyoto 606-8502
  • 62 Nippon Dental University, Niigata 951-8580
  • 63 Luther College, Decorah, Iowa 52101
  • 64 Forschungszentrum Jülich, 52425 Jülich
  • 65 Ludwig Maximilians University, 80539 Munich
  • 66 University of Pittsburgh, Pittsburgh, Pennsylvania 15260
  • 67 École Polytechnique Fédérale de Lausanne (EPFL), Lausanne 1015
  • 68 University of the Basque Country UPV/EHU, 48080 Bilbao
  • 69 Institute of High Energy Physics, Vienna 1050
  • 70 Yamagata University, Yamagata 990-8560
  • 71 School of Physics, University of Melbourne, Victoria 3010
  • 72 Tokyo Institute of Technology, Tokyo 152-8550
  • 73 Department of Physics, National Taiwan University, Taipei 10617
  • 74 Gifu University, Gifu 501-1193
  • 75 J-PARC Branch, KEK Theory Center, High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801
  • 76 Advanced Science Research Center, Japan Atomic Energy Agency, Naka 319-1195
  • 77 University of Florida, Gainesville, Florida 32611
  • 78 National United University, Miao Li 36003
  • 79 Key Laboratory of Nuclear Physics and Ion-beam Application (MOE) and Institute of Modern Physics, Fudan University, Shanghai 200443
  • 80 University of Science and Technology of China, Hefei 230026
Phys Rev Lett, 2019 Mar 01;122(8):082001.
PMID: 30932568 DOI: 10.1103/PhysRevLett.122.082001

Abstract

We present the first measurements of absolute branching fractions of Ξ_{c}^{0} decays into Ξ^{-}π^{+}, ΛK^{-}π^{+}, and pK^{-}K^{-}π^{+} final states. The measurements are made using a dataset comprising (772±11)×10^{6} BB[over ¯] pairs collected at the ϒ(4S) resonance with the Belle detector at the KEKB e^{+}e^{-} collider. We first measure the absolute branching fraction for B^{-}→Λ[over ¯]_{c}^{-}Ξ_{c}^{0} using a missing-mass technique; the result is B(B^{-}→Λ[over ¯]_{c}^{-}Ξ_{c}^{0})=(9.51±2.10±0.88)×10^{-4}. We subsequently measure the product branching fractions B(B^{-}→Λ[over ¯]_{c}^{-}Ξ_{c}^{0})B(Ξ_{c}^{0}→Ξ^{-}π^{+}), B(B^{-}→Λ[over ¯]_{c}^{-}Ξ_{c}^{0})B(Ξ_{c}^{0}→ΛK^{-}π^{+}), and B(B^{-}→Λ[over ¯]_{c}^{-}Ξ_{c}^{0})B(Ξ_{c}^{0}→pK^{-}K^{-}π^{+}) with improved precision. Dividing these product branching fractions by the result for B^{-}→Λ[over ¯]_{c}^{-}Ξ_{c}^{0} yields the following branching fractions: B(Ξ_{c}^{0}→Ξ^{-}π^{+})=(1.80±0.50±0.14)%, B(Ξ_{c}^{0}→ΛK^{-}π^{+})=(1.17±0.37±0.09)%, and B(Ξ_{c}^{0}→pK^{-}K^{-}π^{+})=(0.58±0.23±0.05)%. For the above branching fractions, the first uncertainties are statistical and the second are systematic. Our result for B(Ξ_{c}^{0}→Ξ^{-}π^{+}) can be combined with Ξ_{c}^{0} branching fractions measured relative to Ξ_{c}^{0}→Ξ^{-}π^{+} to yield other absolute Ξ_{c}^{0} branching fractions.

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