We present first evidence that the cosine of the CP-violating weak phase 2β is positive, and hence exclude trigonometric multifold solutions of the Cabibbo-Kobayashi-Maskawa (CKM) Unitarity Triangle using a time-dependent Dalitz plot analysis of B^{0}→D^{(*)}h^{0} with D→K_{S}^{0}π^{+}π^{-} decays, where h^{0}∈{π^{0},η,ω} denotes a light unflavored and neutral hadron. The measurement is performed combining the final data sets of the BABAR and Belle experiments collected at the ϒ(4S) resonance at the asymmetric-energy B factories PEP-II at SLAC and KEKB at KEK, respectively. The data samples contain (471±3)×10^{6}BB[over ¯] pairs recorded by the BABAR detector and (772±11)×10^{6}BB[over ¯] pairs recorded by the Belle detector. The results of the measurement are sin2β=0.80±0.14(stat)±0.06(syst)±0.03(model) and cos2β=0.91±0.22(stat)±0.09(syst)±0.07(model). The result for the direct measurement of the angle β of the CKM Unitarity Triangle is β=[22.5±4.4(stat)±1.2(syst)±0.6(model)]°. The measurement assumes no direct CP violation in B^{0}→D^{(*)}h^{0} decays. The quoted model uncertainties are due to the composition of the D^{0}→K_{S}^{0}π^{+}π^{-} decay amplitude model, which is newly established by performing a Dalitz plot amplitude analysis using a high-statistics e^{+}e^{-}→cc[over ¯] data sample. CP violation is observed in B^{0}→D^{(*)}h^{0} decays at the level of 5.1 standard deviations. The significance for cos2β>0 is 3.7 standard deviations. The trigonometric multifold solution π/2-β=(68.1±0.7)° is excluded at the level of 7.3 standard deviations. The measurement resolves an ambiguity in the determination of the apex of the CKM Unitarity Triangle.

Advanced Science Research Center Japan Atomic Energy Agency Naka 319 1195 Japan

Beihang University Beijing 100191 China

Brookhaven National Laboratory Upton New York 11973 USA

Budker Institute of Nuclear Physics SB RAS Novosibirsk 630090 Russian Federation

California Institute of Technology Pasadena California 91125 USA

CEA Irfu SPP Centre de Saclay F 91191 Gif sur Yvette France

Chonnam National University Kwangju 660 701 South Korea

Department of Physics Faculty of Science King Abdulaziz University Jeddah 21589 Kingdom of Saudi Arabia

Department of Physics Faculty of Science University of Tabuk Tabuk 71451 Kingdom of Saudi Arabia

Department of Physics National Taiwan University Taipei 10617 Taiwan

Department of Physics Technische Universität München 85748 Garching Germany

Department of Physics Tohoku University Sendai 980 8578 Japan

Department of Physics University of Tokyo Tokyo 113 0033 Japan

Department of Physics University of Warwick Coventry CV4 7AL United Kingdom

Deutsches Elektronen Synchrotron 22607 Hamburg Germany

Dipartimento di Fisica e Scienze della Terra Università di Ferrara 1 44122 Ferrara Italy

Dipartimento di Fisica Università di Milano 1 20133 Milano Italy

Dipartimento di Fisica Università di Padova 1 35131 Padova Italy

Dipartimento di Fisica Università di Perugia 1 06123 Perugia Italy

Dipartimento di Fisica Università di Pisa 1 56127 Pisa Italy

Dipartimento di Fisica Università di Roma La Sapienza 1 00185 Roma Italy

Dipartimento di Fisica Università di Torino 1 10125 Torino Italy

Dipartimento di Scienze Fisiche Università di Napoli Federico 2 1 80126 Napoli Italy

Earthquake Research Institute University of Tokyo Tokyo 113 0032 Japan

École Polytechnique Fédérale de Lausanne Lausanne 1015 Switzerland

Excellence Cluster Universe Technische Universität München 85748 Garching Germany

Faculty of Mathematics and Physics Charles University 121 16 Prague Czech Republic

Faculty of Mathematics and Physics University of Ljubljana 1000 Ljubljana Slovenia

Graduate School of Science Nagoya University Nagoya 464 8602 Japan

H Niewodniczanski Institute of Nuclear Physics Krakow 31 342 Poland

Hanyang University Seoul 133 791 South Korea

High Energy Accelerator Research Organization Tsukuba 305 0801 Japan

Humboldt Universität zu Berlin Institut für Physik D 12489 Berlin Germany

IFIC Universitat de Valencia CSIC E 46071 Valencia Spain

IKERBASQUE Basque Foundation for Science 48013 Bilbao Spain

Indian Institute of Science Education and Research Mohali SAS Nagar 140306 India

Indian Institute of Technology Bhubaneswar Satya Nagar 751007 India

Indian Institute of Technology Guwahati Assam 781039 India

Indian Institute of Technology Hyderabad Telangana 502285 India

Indian Institute of Technology Madras Chennai 600036 India

Indiana University Bloomington Indiana 47408 USA

INFN Laboratori Nazionali di Frascati 1 00044 Frascati Italy

INFN Sezione di Bari and Dipartimento di Fisica Università di Bari 1 70126 Bari Italy

INFN Sezione di Ferrara 1 44122 Ferrara Italy

INFN Sezione di Genova 1 16146 Genova Italy

INFN Sezione di Milano 1 20133 Milano Italy

INFN Sezione di Napoli 1 80126 Napoli Italy

INFN Sezione di Padova 1 35131 Padova Italy

INFN Sezione di Perugia 1 06123 Perugia Italy

INFN Sezione di Pisa 1 56127 Pisa Italy

INFN Sezione di Roma 1 00185 Roma Italy

INFN Sezione di Torino 1 10125 Torino Italy

INFN Sezione di Trieste and Dipartimento di Fisica Università di Trieste 1 34127 Trieste Italy

Institut für Experimentelle Teilchenphysik Karlsruher Institut für Technologie 76131 Karlsruhe Germany

Institute of High Energy Physics Chinese Academy of Sciences Beijing 100049 China

Institute of High Energy Physics Vienna 1050 Austria

Institute of Particle Physics Montréal Québec Canada H3A 2T8

Institute of Particle Physics Vancouver British Columbia Canada V6T 1Z1

Institute of Particle Physics Victoria British Columbia Canada V8W 3P6

Iowa State University Ames Iowa 50011 USA

J PARC Branch KEK Theory Center High Energy Accelerator Research Organization Tsukuba 305 0801 Japan

J Stefan Institute 1000 Ljubljana Slovenia

Johannes Gutenberg Universität Mainz Institut für Kernphysik D 55099 Mainz Germany

Johns Hopkins University Baltimore Maryland 21218 USA

Justus Liebig Universität Gießen 35392 Gießen Germany

Kanagawa University Yokohama 221 8686 Japan

Kennesaw State University Kennesaw Georgia 30144 USA

Key Laboratory of Nuclear Physics and Ion Beam Application and Institute of Modern Physics Fudan University Shanghai 200443 China

King Abdulaziz City for Science and Technology Riyadh 11442 Kingdom of Saudi Arabia

Korea Institute of Science and Technology Information Daejeon 305 806 South Korea

Korea University Seoul 136 713 South Korea

Kyungpook National University Daegu 702 701 South Korea

Laboratoire d'Annecy le Vieux de Physique des Particules Université de Savoie CNRS IN2P3 F 74941 Annecy Le Vieux France

Laboratoire de l'Accélérateur Linéaire IN2P3 CNRS et Université Paris Sud 11 Centre Scientifique d'Orsay F 91898 Orsay Cedex France

Laboratoire de Physique Nucléaire et de Hautes Energies IN2P3 CNRS Université Pierre et Marie Curie Paris6 Université Denis Diderot Paris7 F 75252 Paris France

Laboratoire Leprince Ringuet Ecole Polytechnique CNRS IN2P3 F 91128 Palaiseau France

Lawrence Berkeley National Laboratory and University of California Berkeley California 94720 USA

Lawrence Livermore National Laboratory Livermore California 94550 USA

Ludwig Maximilians University 80539 Munich Germany

Luther College Decorah Iowa 52101 USA

Massachusetts Institute of Technology Laboratory for Nuclear Science Cambridge Massachusetts 02139 USA

Max Planck Institut für Physik 80805 München Germany

McGill University Montréal Québec Canada H3A 2T8

Moscow Institute of Physics and Technology Moscow Region 141700 Russian Federation

Moscow Physical Engineering Institute Moscow 115409 Russian Federation

Nara Women's University Nara 630 8506 Japan

National Central University Chung li 32054 Taiwan

National United University Miao Li 36003 Taiwan

Niigata University Niigata 950 2181 Japan

NIKHEF National Institute for Nuclear Physics and High Energy Physics NL 1009 DB Amsterdam The Netherlands

Nippon Dental University Niigata 951 8580 Japan

Novosibirsk State Technical University Novosibirsk 630092 Russian Federation

Novosibirsk State University Novosibirsk 630090 Russian Federation

Ohio State University Columbus Ohio 43210 USA

Osaka City University Osaka 558 8585 Japan

P N Lebedev Physical Institute of the Russian Academy of Sciences Moscow 119991 Russian Federation

Pacific Northwest National Laboratory Richland Washington 99352 USA

Panjab University Chandigarh 160014 India

Peking University Beijing 100871 China

Princeton University Princeton New Jersey 08544 USA

Queen Mary University of London London E1 4NS United Kingdom

Ruhr Universität Bochum Institut für Experimentalphysik 1 D 44780 Bochum Germany

Rutherford Appleton Laboratory Chilton Didcot Oxon OX11 0QX United Kingdom

School of Physics University of Melbourne Victoria 3010 Australia

School of Physics University of Sydney New South Wales 2006 Australia

Scuola Normale Superiore di Pisa 1 56127 Pisa Italy

Showa Pharmaceutical University Tokyo 194 8543 Japan

SLAC National Accelerator Laboratory Stanford California 94309 USA

SOKENDAI Hayama 240 0193 Japan

Soongsil University Seoul 156 743 South Korea

Southern Methodist University Dallas Texas 75275 USA

St Francis Xavier University Antigonish Nova Scotia Canada B2G 2W5

Stanford University Stanford California 94305 USA

State University of New York Albany New York 12222 USA

Sungkyunkwan University Suwon 440 746 South Korea

Tata Institute of Fundamental Research Mumbai 400005 India

Tel Aviv University School of Physics and Astronomy Tel Aviv 69978 Israel

Theoretical Research Division Nishina Center RIKEN Saitama 351 0198 Japan

Toho University Funabashi 274 8510 Japan

Tokyo Institute of Technology Tokyo 152 8550 Japan

Tokyo Metropolitan University Tokyo 192 0397 Japan

Universitat de Barcelona Facultat de Fisica Departament ECM E 08028 Barcelona Spain

Universität Rostock D 18051 Rostock Germany

Université de Montréal Physique des Particules Montréal Québec Canada H3C 3J7

University of Bergen Institute of Physics N 5007 Bergen Norway

University of British Columbia Vancouver British Columbia Canada V6T 1Z1

University of California at Irvine Irvine California 92697 USA

University of California at Riverside Riverside California 92521 USA

University of California at Santa Cruz Institute for Particle Physics Santa Cruz California 95064 USA

University of Cincinnati Cincinnati Ohio 45221 USA

University of Colorado Boulder Colorado 80309 USA

University of Hawaii Honolulu Hawaii 96822 USA

University of Iowa Iowa City Iowa 52242 USA

University of Liverpool Liverpool L69 7ZE United Kingdom

University of London Royal Holloway and Bedford New College Egham Surrey TW20 0EX United Kingdom

University of Louisville Louisville Kentucky 40292 USA

University of Malaya 50603 Kuala Lumpur Malaysia

University of Manchester Manchester M13 9PL United Kingdom

University of Maribor 2000 Maribor Slovenia

University of Maryland College Park Maryland 20742 USA

University of Mississippi University Mississippi 38677 USA

University of Miyazaki Miyazaki 889 2192 Japan

University of Notre Dame Notre Dame Indiana 46556 USA

University of Pittsburgh Pittsburgh Pennsylvania 15260 USA

University of Science and Technology of China Hefei 230026 China

University of South Carolina Columbia South Carolina 29208 USA

University of Tennessee Knoxville Tennessee 37996 USA

University of Texas at Austin Austin Texas 78712 USA

University of Texas at Dallas Richardson Texas 75083 USA

University of the Basque Country UPV EHU 48080 Bilbao Spain

University of Victoria Victoria British Columbia Canada V8W 3P6

University of Wisconsin Madison Wisconsin 53706 USA

Virginia Polytechnic Institute and State University Blacksburg Virginia 24061 USA

Wayne State University Detroit Michigan 48202 USA

Yamagata University Yamagata 990 8560 Japan

Yonsei University Seoul 120 749 South Korea

Citace poskytuje Crossref.org