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Phys Rev Lett. 2017 Mar 17;118(11):111801. doi: 10.1103/PhysRevLett.118.111801. Epub 2017 Mar 13.

Lepton-Flavor-Dependent Angular Analysis of B→K^{*}ℓ^{+}ℓ^{-}.

Wehle S1, Niebuhr C1, Yashchenko S1, Adachi I2,3, Aihara H4, Al Said S5,6, Asner DM7, Aulchenko V8,9, Aushev T10, Ayad R6, Aziz T11, Babu V11, Bakich AM12, Bansal V7, Barberio E13, Bartel W1, Behera P14, Bhuyan B15, Biswal J16, Bobrov A8,9, Bondar A8,9, Bonvicini G17, Bozek A18, Bračko M16,19, Browder TE20, Červenkov D21, Chang P22, Chekelian V23, Chen A24, Cheon BG25, Chilikin K26,27, Chistov R26,27, Cho K28, Choi Y29, Cinabro D17, Dash N30, Dingfelder J31, Doležal Z21, Drásal Z21, Dutta D11, Eidelman S8,9, Epifanov D8,9, Farhat H17, Fast JE7, Ferber T1, Fulsom BG7, Gaur V11, Gabyshev N8,9, Garmash A8,9, Gillard R17, Goldenzweig P32, Golob B16,33, Grzymkowska O18, Guido E34, Haba J2,3, Hara T2,3, Hayasaka K35, Hayashii H36, Hedges MT20, Hou WS22, Hsu CL13, Iijima T37,38, Inami K37, Inguglia G1, Ishikawa A39, Itoh R2,3, Iwasaki Y3, Jacobs WW40, Jaegle I41, Jeon HB42, Jin Y4, Joffe D43, Joo KK44, Julius T13, Kaliyar AB14, Kang KH42, Karyan G1, Katrenko P26,10, Kawasaki T35, Kichimi H3, Kiesling C23, Kim DY45, Kim HJ42, Kim JB46, Kim KT46, Kim MJ42, Kim SH25, Kinoshita K47, Koch L48, Kodyš P21, Korpar S16,19, Kotchetkov D20, Križan P16,33, Krokovny P8,9, Kuhr T49, Kulasiri R43, Kumita T50, Kuzmin A8,9, Kwon YJ51, Lange JS48, Li CH13, Li L52, Li Y53, Li Gioi L23, Libby J14, Liventsev D3,53, Lubej M16, Luo T54, Masuda M55, Matsuda T56, Miyabayashi K36, Miyake H2,3, Mizuk R26,27,10, Mohanty GB11, Mori T37, Mussa R34, Nakano E57, Nakao M2,3, Nanut T16, Nath KJ15, Natkaniec Z18, Nayak M3,17, Nisar NK54, Nishida S2,3, Ogawa S58, Ono H59,35, Onuki Y4, Pakhlova G26,10, Pal B47, Park CS51, Park CW29, Park H42, Paul S60, Pesántez L31, Piilonen LE53, Pulvermacher C3, Rauch J60, Ritter M49, Rostomyan A1, Sakai Y2,3, Sandilya S47, Santelj L3, Sanuki T39, Sato Y37, Savinov V54, Schlüter T49, Schneider O61, Schnell G62,63, Schwanda C64, Schwartz AJ47, Seino Y35, Senyo K65, Seon O37, Seong IS20, Sevior ME13, Shen CP66, Shibata TA67, Shiu JG22, Shwartz B8,9, Simon F23,68, Sinha R69, Solovieva E26,10, Starič M16, Strube JF7, Sumisawa K2,3, Sumiyoshi T50, Takizawa M70,71,72, Tamponi U34,73, Tenchini F13, Trabelsi K2,3, Tsuboyama T2,3, Uchida M67, Uglov T26,10, Unno Y25, Uno S2,3, Urquijo P13, Ushiroda Y2,3, Usov Y8,9, Vahsen SE20, Van Hulse C62, Varner G20, Varvell KE12, Vorobyev V8,9, Vossen A40, Waheed E13, Wang CH74, Wang MZ22, Wang P75, Watanabe M35, Watanabe Y76, Widmann E77, Williams KM53, Won E46, Yamamoto H39, Yamashita Y59, Ye H1, Yook Y51, Yuan CZ75, Yusa Y35, Zhang ZP52, Zhilich V8,9, Zhukova V27, Zhulanov V8,9, Ziegler M32, Zupanc A16,33; Belle Collaboration.

Author information

1
Deutsches Elektronen-Synchrotron, 22607 Hamburg.
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
Department of Physics, Faculty of Science, King Abdulaziz University, Jeddah 21589.
6
Department of Physics, Faculty of Science, University of Tabuk, Tabuk 71451.
7
Pacific Northwest National Laboratory, Richland, Washington 99352.
8
Budker Institute of Nuclear Physics SB RAS, Novosibirsk 630090.
9
Novosibirsk State University, Novosibirsk 630090.
10
Moscow Institute of Physics and Technology, Moscow Region 141700.
11
Tata Institute of Fundamental Research, Mumbai 400005.
12
School of Physics, University of Sydney, New South Wales 2006.
13
School of Physics, University of Melbourne, Victoria 3010.
14
Indian Institute of Technology Madras, Chennai 600036.
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
Department of Physics, National Taiwan University, Taipei 10617.
23
Max-Planck-Institut für Physik, 80805 München.
24
National Central University, Chung-li 32054.
25
Hanyang University, Seoul 133-791.
26
P.N. Lebedev Physical Institute of the Russian Academy of Sciences, Moscow 119991.
27
Moscow Physical Engineering Institute, Moscow 115409.
28
Korea Institute of Science and Technology Information, Daejeon 305-806.
29
Sungkyunkwan University, Suwon 440-746.
30
Indian Institute of Technology Bhubaneswar, Satya Nagar 751007.
31
University of Bonn, 53115 Bonn.
32
Institut für Experimentelle Kernphysik, Karlsruher Institut für Technologie, 76131 Karlsruhe.
33
Faculty of Mathematics and Physics, University of Ljubljana, 1000 Ljubljana.
34
INFN-Sezione di Torino, 10125 Torino.
35
Niigata University, Niigata 950-2181.
36
Nara Women's University, Nara 630-8506.
37
Graduate School of Science, Nagoya University, Nagoya 464-8602.
38
Kobayashi-Maskawa Institute, Nagoya University, Nagoya 464-8602.
39
Department of Physics, Tohoku University, Sendai 980-8578.
40
Indiana University, Bloomington, Indiana 47408.
41
University of Florida, Gainesville, Florida 32611.
42
Kyungpook National University, Daegu 702-701.
43
Kennesaw State University, Kennesaw, Georgia 30144.
44
Chonnam National University, Kwangju 660-701.
45
Soongsil University, Seoul 156-743.
46
Korea University, Seoul 136-713.
47
University of Cincinnati, Cincinnati, Ohio 45221.
48
Justus-Liebig-Universität Gießen, 35392 Gießen.
49
Ludwig Maximilians University, 80539 Munich.
50
Tokyo Metropolitan University, Tokyo 192-0397.
51
Yonsei University, Seoul 120-749.
52
University of Science and Technology of China, Hefei 230026.
53
Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061.
54
University of Pittsburgh, Pittsburgh, Pennsylvania 15260.
55
Earthquake Research Institute, University of Tokyo, Tokyo 113-0032.
56
University of Miyazaki, Miyazaki 889-2192.
57
Osaka City University, Osaka 558-8585.
58
Toho University, Funabashi 274-8510.
59
Nippon Dental University, Niigata 951-8580.
60
Department of Physics, Technische Universität München, 85748 Garching.
61
École Polytechnique Fédérale de Lausanne (EPFL), Lausanne 1015.
62
University of the Basque Country UPV/EHU, 48080 Bilbao.
63
IKERBASQUE, Basque Foundation for Science, 48013 Bilbao.
64
Institute of High Energy Physics, Vienna 1050.
65
Yamagata University, Yamagata 990-8560.
66
Beihang University, Beijing 100191.
67
Tokyo Institute of Technology, Tokyo 152-8550.
68
Excellence Cluster Universe, Technische Universität München, 85748 Garching.
69
Institute of Mathematical Sciences, Chennai 600113.
70
J-PARC Branch, KEK Theory Center, High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801.
71
Theoretical Research Division, Nishina Center, RIKEN, Saitama 351-0198.
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
Kanagawa University, Yokohama 221-8686.
77
Stefan Meyer Institute for Subatomic Physics, Vienna 1090.

Abstract

We present a measurement of angular observables and a test of lepton flavor universality in the B→K^{*}ℓ^{+}ℓ^{-} decay, where ℓ is either e or μ. The analysis is performed on a data sample corresponding to an integrated luminosity of 711  fb^{-1} containing 772×10^{6} BB[over ¯] pairs, collected at the ϒ(4S) resonance with the Belle detector at the asymmetric-energy e^{+}e^{-} collider KEKB. The result is consistent with standard model (SM) expectations, where the largest discrepancy from a SM prediction is observed in the muon modes with a local significance of 2.6σ.

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