Format

Send to

Choose Destination
Phys Rev Lett. 2016 Jul 1;117(1):011801. doi: 10.1103/PhysRevLett.117.011801. Epub 2016 Jun 27.

First Observation of the Doubly Cabibbo-Suppressed Decay of a Charmed Baryon: Λ_{c}^{+}→pK^{+}π^{-}.

Yang SB1, Tanida K1, Kim BH1, Adachi I2,3, Aihara H4, Asner DM5, Aulchenko V6,7, Aushev T8, Babu V9, Badhrees I10,11, Bakich AM12, Barberio E13, Bhardwaj V14, Bhuyan B15, Biswal J16, Bonvicini G17, Bozek A18, Bračko M16,19, Browder TE20, Červenkov D21, Chekelian V22, Chen A23, Cheon BG24, Chilikin K25, Chistov R25, Cho K26, Chobanova V22, Choi Y27, Cinabro D17, Dalseno J22,28, Danilov M25, Dash N29, Doležal Z21, Drásal Z21, Dutta D9, Eidelman S6,7, Farhat H17, Fast JE5, Ferber T30, Fulsom BG5, Gabyshev N6,7, Garmash A6,7, Gaur V9, Gillard R17, Goh YM24, Goldenzweig P31, Greenwald D32, Grygier J31, Haba J2,3, Hamer P33, Hara T2,3, Hayasaka K34, Hayashii H35, Hou WS36, Iijima T37,34, Inami K37, Inguglia G30, Ishikawa A38, Itoh R2,3, Iwasaki Y3, Jacobs WW39, Jaegle I20, Jeon HB40, Joo KK41, Julius T13, Kang KH40, Kato E38, Katrenko P8, Kiesling C22, Kim DY42, Kim HJ40, Kim JB43, Kim KT43, Kim MJ40, Kim SH24, Kim SK1, Kim YJ26, Kinoshita K44, Kobayashi N45, Kodyš P21, Korpar S16,19, Križan P16,46, Krokovny P6,7, Kuhr T47, Kuzmin A6,7, Kwon YJ48, Lange JS49, Lee IS24, Li CH13, Li H39, Li L50, Li Y51, Li Gioi L22, Libby J52, Liventsev D3,51, Lubej M16, Masuda M53, Matvienko D6,7, Miyabayashi K35, Miyata H54, Mizuk R25,8, Mohanty GB9, Moll A22,28, Moon HK43, Mussa R55, Nakano E56, Nakao M2,3, Nanut T16, Nath KJ15, Nayak M52, Negishi K38, Niiyama M57, Nisar NK58,9, Nishida S2,3, Ogawa S59, Okuno S60, Olsen SL1, Pakhlova G8, Pal B44, Park CW27, Park H40, Pedlar TK61, Pestotnik R16, Petrič M16, Piilonen LE51, Pulvermacher C31, Rauch J32, Ritter M47, Rostomyan A30, Ryu S1, Sahoo H20, Sakai Y2,3, Sandilya S9, Santelj L3, Sanuki T38, Sato Y37, Savinov V62, Schlüter T47, Schneider O63, Schnell G64,65, Schwanda C66, Schwartz AJ44, Seino Y54, Senyo K67, Seon O37, Seong IS20, Sevior ME13, Shebalin V6,7, Shibata TA45, Shiu JG36, Shwartz B6,7, Simon F22,28, Sohn YS48, Sokolov A68, Stanič S69, Starič M16, Stypula J18, Sumihama M70, Sumiyoshi T71, Takizawa M72, Tamponi U55,73, Teramoto Y56, Trabelsi K2,3, Trusov V31, Uchida M45, Uglov T8, Unno Y24, Uno S2,3, Urquijo P13, Usov Y6,7, Vanhoefer P22, Varner G20, Varvell KE12, Vinokurova A6,7, Vossen A39, Wagner MN49, Wang CH74, Wang MZ36, Wang P75, Wang XL51, Watanabe Y60, Williams KM51, Won E43, Yamaoka J5, Yashchenko S30, Ye H30, Yelton J76, Yuan CZ75, Yusa Y54, Zhang ZP50, Zhilich V6,7, Zhulanov V6,7, Zupanc A16,46; Belle Collaboration.

Author information

1
Seoul National University, Seoul 151-742.
2
SOKENDAI (The Graduate University for Advanced Studies), Hayama 240-0193.
3
High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801.
4
Department of Physics, University of Tokyo, Tokyo 113-0033.
5
Pacific Northwest National Laboratory, Richland, Washington 99352.
6
Budker Institute of Nuclear Physics SB RAS, Novosibirsk 630090.
7
Novosibirsk State University, Novosibirsk 630090.
8
Moscow Institute of Physics and Technology, Moscow Region 141700.
9
Tata Institute of Fundamental Research, Mumbai 400005.
10
King Abdulaziz City for Science and Technology, Riyadh 11442.
11
Department of Physics, Faculty of Science, University of Tabuk, Tabuk 71451.
12
School of Physics, University of Sydney, New South Wales 2006.
13
School of Physics, University of Melbourne, Victoria 3010.
14
University of South Carolina, Columbia, South Carolina 29208.
15
Indian Institute of Technology Guwahati, Assam 781039.
16
J. Stefan Institute, 1000 Ljubljana.
17
Wayne State University, Detroit, Michigan 48202.
18
H. Niewodniczanski Institute of Nuclear Physics, Krakow 31-342.
19
University of Maribor, 2000 Maribor.
20
University of Hawaii, Honolulu, Hawaii 96822.
21
Faculty of Mathematics and Physics, Charles University, 121 16 Prague.
22
Max-Planck-Institut für Physik, 80805 München.
23
National Central University, Chung-li 32054.
24
Hanyang University, Seoul 133-791.
25
Moscow Physical Engineering Institute, Moscow 115409.
26
Korea Institute of Science and Technology Information, Daejeon 305-806.
27
Sungkyunkwan University, Suwon 440-746.
28
Excellence Cluster Universe, Technische Universität München, 85748 Garching.
29
Indian Institute of Technology Bhubaneswar, Satya Nagar 751007.
30
Deutsches Elektronen-Synchrotron, 22607 Hamburg.
31
Institut für Experimentelle Kernphysik, Karlsruher Institut für Technologie, 76131 Karlsruhe.
32
Department of Physics, Technische Universität München, 85748 Garching.
33
II. Physikalisches Institut, Georg-August-Universität Göttingen, 37073 Göttingen.
34
Kobayashi-Maskawa Institute, Nagoya University, Nagoya 464-8602.
35
Nara Women's University, Nara 630-8506.
36
Department of Physics, National Taiwan University, Taipei 10617.
37
Graduate School of Science, Nagoya University, Nagoya 464-8602.
38
Department of Physics, Tohoku University, Sendai 980-8578.
39
Indiana University, Bloomington, Indiana 47408.
40
Kyungpook National University, Daegu 702-701.
41
Chonnam National University, Kwangju 660-701.
42
Soongsil University, Seoul 156-743.
43
Korea University, Seoul 136-713.
44
University of Cincinnati, Cincinnati, Ohio 45221.
45
Tokyo Institute of Technology, Tokyo 152-8550.
46
Faculty of Mathematics and Physics, University of Ljubljana, 1000 Ljubljana.
47
Ludwig Maximilians University, 80539 Munich.
48
Yonsei University, Seoul 120-749.
49
Justus-Liebig-Universität Gießen, 35392 Gießen.
50
University of Science and Technology of China, Hefei 230026.
51
CNP, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061.
52
Indian Institute of Technology Madras, Chennai 600036.
53
Earthquake Research Institute, University of Tokyo, Tokyo 113-0032.
54
Niigata University, Niigata 950-2181.
55
INFN-Sezione di Torino, 10125 Torino.
56
Osaka City University, Osaka 558-8585.
57
Kyoto University, Kyoto 606-8502.
58
Aligarh Muslim University, Aligarh 202002.
59
Toho University, Funabashi 274-8510.
60
Kanagawa University, Yokohama 221-8686.
61
Luther College, Decorah, Iowa 52101.
62
University of Pittsburgh, Pittsburgh, Pennsylvania 15260.
63
École Polytechnique Fédérale de Lausanne (EPFL), Lausanne 1015.
64
University of the Basque Country UPV/EHU, 48080 Bilbao.
65
IKERBASQUE, Basque Foundation for Science, 48013 Bilbao.
66
Institute of High Energy Physics, Vienna 1050.
67
Yamagata University, Yamagata 990-8560.
68
Institute for High Energy Physics, Protvino 142281.
69
University of Nova Gorica, 5000 Nova Gorica.
70
Gifu University, Gifu 501-1193.
71
Tokyo Metropolitan University, Tokyo 192-0397.
72
Showa Pharmaceutical University, Tokyo 194-8543.
73
University of Torino, 10124 Torino.
74
National United University, Miao Li 36003.
75
Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049.
76
University of Florida, Gainesville, Florida 32611.

Abstract

We report the first observation of the decay Λ_{c}^{+}→pK^{+}π^{-} using a 980  fb^{-1} data sample collected by the Belle detector at the KEKB asymmetric-energy e^{+}e^{-} collider. This is the first observation of a doubly Cabibbo-suppressed decay of a charmed baryon. We measure the branching ratio of this decay with respect to its Cabibbo-favored counterpart to be B(Λ_{c}^{+}→pK^{+}π^{-})/B(Λ_{c}^{+}→pK^{-}π^{+})=(2.35±0.27±0.21)×10^{-3}, where the uncertainties are statistical and systematic, respectively.

Supplemental Content

Full text links

Icon for American Physical Society
Loading ...
Support Center