Accès ouvert déclaré 2013 article

Measurement of the $\it{CP}$ Violation Parameters in $\it{B^{0}} -> \pi^{+}\pi^{-}$ Decays

Belle Collaboration, J. Dalseno, A. M. Bakich, M Nakao, M. Nayak, E. Nedelkovska, C. Ng, C. Niebuhr, N. K. Nisar, S Nishida, O. Nitoh, S Ogawa, S. Okuno, A. Bala, S. L. Olsen, P. Pakhlov, G Pakhlova, C. W. Park, H. K. Park, T. K. Pedlar, R Pestotnik, M. Petrič, L. E. Piilonen, A. Bay, M. Ritter, M. Röhrken, A Rostomyan, S. Ryu, H. Sahoo, T. Saito, Y. Sakai, S Sandilya, L Santelj, T. Sanuki, P. Behera, V Savinov, O. Schneider, G Schnell, C. Schwanda, A. J. Schwartz, D. Semmler, K Senyo, O. Seon, M. E. Sevior, M. Shapkin, V Bhardwaj, C. P. Shen, T. -A. Shibata, J. -G. Shiu, B Shwartz, A Sibidanov, F Simon, Y.-S. Sohn, E. Solovieva, S. Stanič, M Starič, B. Bhuyan, M. Steder, M Sumihama, K. Sumisawa, T. Sumiyoshi, U Tamponi, G. Tatishvili, Y. Teramoto, K. Trabelsi, T. Tsuboyama, M Uchida, A. Bondar, S. Uehara, T. Uglov, Y Unno, S Uno, P. Urquijo, Y Ushiroda, S. E. Vahsen, C. Van Hulse, P. Vanhoefer, G. Varner, G Bonvicini, V. Vorobyev, M. N. Wagner, C. H. Wang, P. Wang, X. L. Wang, M. Watanabe, Y. Watanabe, K. M. Williams, E. Won, B. D. Yabsley, A. Bozek, H. Yamamoto, Y. Yamashita, S. Yashchenko, Y. Yook, C. Z. Yuan, Y Yusa, Z. P. Zhang, V Zhilich, V. Zhulanov, A. Zupanc, M Bračko, T Ferber, K. Prothmann, T. E. Browder, V. Chekelian, A. Chen, P. Chen, B. G. Cheon, K Chilikin, R. Chistov, K Cho, V. Chobanova, S. -K. Choi, C Kiesling, Y. Choi, D. Cinabro, M. Danilov, Z Doležal, Z. Drásal, A. Drutskoy, D. Dutta, K. Dutta, S. Eidelman, H. Farhat, I Adachi, J. E. Fast, M. Feindt, A Frey, V Gaur, S. Ganguly, R. Gillard, Y. M. Goh, B. Golob, J. Haba, T. Hara, H Aihara, K Hayasaka, H Hayashii, T Higuchi, Y. Hoshi, W. -S. Hou, H. J. Hyun, T Iijima, A Ishikawa, R Itoh, Y. Iwasaki, K. Arinstein, T. Julius, D. H. Kah, E. Kato, H. Kawai, T. Kawasaki, D Kim, H Kim, Jinwoo Kim, K. T. Kim, D. M. Asner, Y. J. Kim, K Kinoshita, J. Klucar, B. R. Ko, P Kodyš, S. Korpar, P Križan, P Krokovny, B. Kronenbitter, A. Kuzmin, V. Aulchenko, Y. Kwon, S. H. Lee, J. Li, Y Li, L. Li Gioi, J Libby, C Liu, D. Liventsev, P. Lukin, D Matvienko, T. Aushev, K Miyabayashi, H. Miyata, R Mizuk, G. B. Mohanty, A. Moll, T. Mori, H. -G. Moser, N. Muramatsu, R Mussa, y. Nagasaka

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71Institutions déclarées

18Pays d’affiliation déclarés

Rattachement africain : de, au, jp, in, kr, no, Éthiopie, ru, si, ch, us, es, at, cn, tw, it, pl, cz. Niveau de preuve : code pays fourni par la source.

Le résumé fourni par la source

We present a measurement of the time-dependent CP violation parameters in B0 -> pi+ pi- decays. The results are obtained from the final data sample containing 772 million BBbar pairs collected at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. We obtain the CP violation parameters Acp = +0.33 +/- 0.06 (stat) +/- 0.03 (syst) and Scp = -0.64 +/- 0.08 (stat) +/- 0.03 (syst), where Acp and Scp represent the direct and mixing-induced CP asymmetry, respectively. Using an isospin analysis including results from other Belle measurements, we find 23.8 < phi2 < 66.8 degrees is disfavored at the 1 sigma level, where phi2 is one of the three interior angles of the CKM unitarity triangle related to B_{u,d} decays.

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.

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Les institutions déclarées

Max Planck Institute for Physics Excellence Cluster Universe Max Planck Institute of Psychiatry The University of Sydney High Energy Accelerator Research Organization Indian Institute of Technology Madras Yonsei University The University of Tokyo Deutsches Elektronen-Synchrotron DESY Tata Institute of Fundamental Research Tokyo University of Agriculture and Technology Toho University Campbell Collaboration Korea Institute of Science & Technology Information Panjab University Seoul National University New Generation University College Institute of Engineering Physics Institute for Theoretical and Experimental Physics Jožef Stefan Institute École Polytechnique Fédérale de Lausanne Karlsruhe Institute of Technology University of Seoul Korea University DVGW-Forschungsstelle am Engler-Bunte-Institut des Karlsruher Instituts für Technologie Kyungpook National University University of Pittsburgh University of the Basque Country Institute of High Energy Physics Institute of High Energy Physics University of Cincinnati Justus-Liebig-Universität Gießen Yamagata University Nagoya University The University of Melbourne Victoria University Institute for High Energy Physics Nara Women's University Tokyo Institute of Technology National Taiwan University National Taipei University Budker Institute of Nuclear Physics Indian Institute of Technology Guwahati Indian Institute of Information Technology Guwahati Gifu University Istituto Nazionale di Fisica Nucleare, Sezione di Torino Pacific Northwest National Laboratory Institute of Physics and Technology University of Bonn Wayne State University Institute of Nuclear Physics, Polish Academy of Sciences Nippon Dental University University of Science and Technology of China Hefei University of Technology University of Maribor National Central University Sungkyunkwan University Gyeongsang National University Chinju National University of Education Charles University Osaka City University University of Göttingen Tohoku Gakuin University University of Ljubljana Luther College Kavli Institute for the Physics and Mathematics of the Universe Tohoku University Chiba University Tokyo Metropolitan University Kanagawa University Hiroshima Institute of Technology

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Les sujets associés

Quantum Chromodynamics and Particle InteractionsParticle physics theoretical and experimental studiesNeutrino Physics Research

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