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Observation of CP violation in two-body \( {B}_{(s)}^0 \)-meson decays to charged pions and kaons
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  • Regular Article - Experimental Physics
  • Open Access
  • Published: 08 March 2021

Observation of CP violation in two-body \( {B}_{(s)}^0 \)-meson decays to charged pions and kaons

  • The LHCb collaboration,
  • R. Aaij31,
  • C. Abellán Beteta49,
  • T. Ackernley59,
  • B. Adeva45,
  • M. Adinolfi53,
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Journal of High Energy Physics volume 2021, Article number: 75 (2021) Cite this article

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A preprint version of the article is available at arXiv.

Abstract

The time-dependent CP asymmetries of B0 → π+π− and \( {B}_s^0 \) → K+K− decays are measured using a data sample of pp collisions corresponding to an integrated luminosity of 1.9 fb−1, collected with the LHCb detector at a centre-of-mass energy of 13 TeV. The results are

$$ {\displaystyle \begin{array}{c}{C}_{\pi \pi}=-0.311\pm 0.045\pm 0.015,\\ {}{S}_{\pi \pi}=-0.706\pm 0.042\pm 0.013,\\ {}{C}_{KK}=0.123\pm 0.034\pm 0.015,\\ {}{S}_{KK}=0.164\pm 0.034\pm 0.014,\\ {}{\mathcal{A}}_{KK}^{\Delta \varGamma }=-0.83\pm 0.05\pm 0.09,\end{array}} $$

where the first uncertainties are statistical and the second systematic. The same data sample is used to measure the time-integrated CP asymmetries of B0 → K + π− and \( {B}_s^0 \) → K−π+ decays and the results are

$$ {\displaystyle \begin{array}{c}{A}_{CP}^{B^0}=-0.0824\pm 0.0033\pm 0.0033,\\ {}{A}_{CP}^{B_s^0}=0.236\pm 0.013\pm 0.011.\end{array}} $$

All results are consistent with earlier measurements. A combination of LHCb measurements provides the first observation of time-dependent CP violation in \( {B}_s^0 \) decays.

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Authors and Affiliations

  1. Centro Brasileiro de Pesquisas Físicas (CBPF), Rio de Janeiro, Brazil

    J. Baptista Leite, I. Bediaga, M. Cruz Torres, J. M. De Miranda, A. C. dos Reis, A. Gomes, A. Massafferri & D. Torres Machado

  2. Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil

    S. Amato, L. De Paula, F. Ferreira Rodrigues, M. Gandelman, A. Hicheur, J. H. Lopes, L. Meyer Garcia, I. Nasteva, J. M. Otalora Goicochea, E. Polycarpo, M. S. Rangel, F. L. Souza De Almeida & B. Souza De Paula

  3. Center for High Energy Physics, Tsinghua University, Beijing, China

    C. Chen, J. Fan, Y. Gan, G. Gong, C. Gu, F. Jiang, Y. Kang, X. Liu, Y. Luo, H. Mu, Z. Ren, J. Wang, M. Wang, L. Xu, D. Yang, Z. Yang, M. Zeng, L. Zhang & X. Zhu

  4. School of Physics State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing, China

    Y. Gao, Z. Shen, J. Wang, A. Xu, Z. Xu, S. Zhang & Y. Zhang

  5. University of Chinese Academy of Sciences, Beijing, China

    A. F. Campoverde Quezada, Y. Fan, J. He, W. Huang, H. Liu, X. Lyu, D. Popov, W. Qian, J. Qin, M. Saur, Z. Xiang, J. Xu, Q. Xu, Z. Xu, Y. Yang, Y. Zheng, X. Zhou & Y. Zhou

  6. Institute Of High Energy Physics (IHEP), Beijing, China

    I. Carli, Y. Li, Y. Li, S. Liu, Y. Lu, L. Ma, M. Tobin & J. Wang

  7. Institute of Particle Physics, Central China Normal University, Wuhan, Hubei, China

    Q. Han, W. Hu, M. Mukherjee, Y. Wang, D. Xiao, Y. Xie, M. Xu, H. Yin & D. Zhang

  8. Univ. Grenoble Alpes, Univ. Savoie Mont Blanc, CNRS, IN2P3-LAPP, Annecy, France

    M. Chefdeville, D. Decamp, A. G. Downes, Ph. Ghez, J. F. Marchand, M.-N. Minard, B. Pietrzyk, B. Quintana, M. Reboud & S. T’Jampens

  9. Université Clermont Auvergne, CNRS/IN2P3, LPC, Clermont-Ferrand, France

    H. Afsharnia, Z. Ajaltouni, E. Cogneras, O. Deschamps, R. Lefèvre, J. Maratas, S. Monteil, P. Perret, H. Sazak, L. Soares Lavra & V. Tisserand

  10. Aix Marseille Univ, CNRS/IN2P3, CPPM, Marseille, France

    E. Aslanides, J. Cerasoli, J. Cogan, D. Gerstel, R. Le Gac, O. Leroy, G. Mancinelli, C. Meaux, P. K Resmi, A. Poluektov & R. I. Rabadan Trejo

  11. Université Paris-Saclay, CNRS/IN2P3, IJCLab, Orsay, France

    Y. Amhis, B. Audurier, V. Balagura, S. Barsuk, J. A. B. Coelho, F. Desse, F. Fleuret, F. A. Garcia Rosales, F. Machefert, C. Marin Benito, E. Maurice, E. M. Niel, P. Robbe, M. H. Schune & G. Wormser

  12. LPNHE, Sorbonne Université, Paris Diderot Sorbonne Paris Cité, CNRS/IN2P3, Paris, France

    E. Ben-Haim, E. Bertholet, P. Billoir, L. Calefice, M. Charles, L. Del Buono, M. Fontana, V. V. Gligorov, T. Grammatico, F. Polci, R. Quagliani, F. Reiss, A. Robert, D. Y. Tou, P. Vincent, D. Vom Bruch & S. G. Weber

  13. I. Physikalisches Institut, RWTH Aachen University, Aachen, Germany

    J. M. Basels, L. Carus, S. Escher, A. Guth, J. Heuel, T. Kirn, S. Kretzschmar, C. Langenbruch, M. Materok, S. Nieswand, S. Schael, E. Smith & V. Zhukov

  14. Fakultät Physik, Technische Universität Dortmund, Dortmund, Germany

    J. Albrecht, A. Battig, M. Becker, M. S. Bieker, J. A. Boelhauve, L. Calefice, E. Dall’Occo, H.-P. Dembinski, Q. Fuehring, L. L. Gerken, K. Heinicke, S. E. Hollitt, P. Ibis, V. Jevtic, B. Khanji, J. Langer, V. Lisovskyi, P. Mackowiak, G. Meier, A. Mödden, T. Mombächer, M. Schellenberg, T. Schmelzer, A. Seuthe, B. Spaan, H. Stevens, T. Tekampe & D. Wiedner

  15. Max-Planck-Institut für Kernphysik (MPIK), Heidelberg, Germany

    M. Schmelling & M. Zavertyaev

  16. Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Germany

    F. Archilli, S. Bachmann, D. Berninghoff, M. Borsato, M. Dziewiecki, G. Frau, D. Gerick, J. P. Grabowski, P. A. Günther, X. Han, S. Hansmann-Menzemer, J. Hu, R. Kopecna, B. Leverington, P. Li, H. Malygina, J. Marks, A. Piucci, S. Stemmle, D. J. Unverzagt, U. Uwer, C. Wang, L. Witola & A. Zhelezov

  17. School of Physics, University College Dublin, Dublin, Ireland

    A. M. Donohoe, L. Mcconnell, R. McNulty, N. V. Raab & C. B. Van Hulse

  18. INFN Sezione di Bari, Bari, Italy

    L. Congedo, M. De Serio, R. A. Fini, A. Palano, M. Pappagallo, A. Pastore & S. Simone

  19. INFN Sezione di Bologna, Bologna, Italy

    F. Betti, L. Capriotti, A. Carbone, A. Falabella, F. Ferrari, D. Galli, S. Maccolini, D. Manuzzi, U. Marconi, C. Patrignani, S. Perazzini, M. Soares, V. Vagnoni, G. Valenti & S. Zucchelli

  20. INFN Sezione di Ferrara, Ferrara, Italy

    M. Andreotti, W. Baldini, C. Bozzi, R. Calabrese, M. Fiorini, E. Franzoso, C. Giugliano, P. Griffith, M. Guarise, E. Luppi, L. Minzoni, I. Neri, L. L. Pappalardo, B. Passalacqua, B. G. Siddi, I. Skiba, L. Tomassetti & S. Vecchi

  21. INFN Sezione di Firenze, Firenze, Italy

    L. An, L. Anderlini, A. Bizzeti, G. Graziani, S. Mariani, G. Passaleva & M. Veltri

  22. INFN Laboratori Nazionali di Frascati, Frascati, Italy

    G. Bencivenni, L. Calero Diaz, S. Cali, P. Campana, P. Ciambrone, P. De Simone, P. Di Nezza, M. Giovannetti, G. Lanfranchi, G. Morello, M. Palutan, M. Poli Lener, M. Rotondo, M. Santimaria & B. Sciascia

  23. INFN Sezione di Genova, Genova, Italy

    M. Bartolini, R. Cardinale, F. Fontanelli & A. Petrolini

  24. INFN Sezione di Milano-Bicocca, Milano, Italy

    M. Calvi, S. Capelli, P. Carniti, D. Fazzini, C. Gotti, M. Martinelli, C. Matteuzzi, S. Meloni & E. B. Shields

  25. INFN Sezione di Milano, Milano, Italy

    S. Aiola, J. Fu, P. Gandini, L. Henry, D. Marangotto, A. Merli, N. Neri, M. Petruzzo & E. Spadaro Norella

  26. INFN Sezione di Cagliari, Monserrato, Italy

    S. Belin, D. Brundu, A. Bursche, S. Cadeddu, A. Cardini, S. Chen, A. Contu, F. Dettori, F. Dordei, M. Garau, A. Lai, A. Lampis, R. Litvinov, A. Loi, G. Manca, P. Muzzetto, R. Oldeman, B. Saitta & J. Sun

  27. Universita degli Studi di Padova, Universita e INFN, Padova, Padova, Italy

    A. Bertolin, D. Lucchesi, M. Morandin, L. Sestini, G. Simi & D. Zuliani

  28. INFN Sezione di Pisa, Pisa, Italy

    G. Bassi, F. Bedeschi, F. Lazzari, A. Lusiani, M. J. Morello, T. Pajero, L. Pica, G. Punzi, M. Rama, R. Ribatti, G. Tuci, G. Vitali & J. Walsh

  29. INFN Sezione di Roma Tor Vergata, Roma, Italy

    G. Carboni, E. Santovetti & A. Satta

  30. INFN Sezione di Roma La Sapienza, Roma, Italy

    S. Kotriakhova, G. Martellotti, D. Pinci, R. Santacesaria, A. Sarti, C. Satriano & A. Sciubba

  31. Nikhef National Institute for Subatomic Physics, Amsterdam, Netherlands

    R. Aaij, J. S. Butter, K. Carvalho Akiba, S. Esen, S. Ferreres Sole, E. Gabriel, R. E. Geertsema, E. Govorkova, L. M. Greeven, K. Heijhoff, W. Hulsbergen, D. Hynds, E. Jans, S. Klaver, P. Koppenburg, I. Kostiuk, H. S. Kuindersma, M. Lucio Martinez, V. Lukashenko, A. Mauri, M. Merk, A. Pellegrino, C. Sanchez Gras, M. Schubiger, A. Snoch, N. Tuning, A. Usachov, M. van Beuzekom, C. Vázquez Sierra & M. Veronesi

  32. Nikhef National Institute for Subatomic Physics and VU University Amsterdam, Amsterdam, Netherlands

    T. Ketel, G. Raven & M. Senghi Soares

  33. Henryk Niewodniczanski Institute of Nuclear Physics Polish Academy of Sciences, Kraków, Poland

    J. Bhom, J. T. Borsuk, J. Brodzicka, A. Chernov, M. Chrzaszcz, M. W. Dudek, A. Dziurda, M. Goncerz, M. Jezabek, W. Kucewicz, M. Kucharczyk, T. Lesiak, J. J. Malczewski, A. Ossowska, K. Prasanth, M. Witek & M. Zdybal

  34. AGH — University of Science and Technology, Faculty of Physics and Applied Computer Science, Kraków, Poland

    A. Dendek, M. Firlej, T. Fiutowski, M. Idzik, P. Kopciewicz, W. Krupa, O. Madejczyk, M. W. Majewski, J. Moron, A. Oblakowska-Mucha, B. Rachwal, J. Ryzka, K. Swientek & T. Szumlak

  35. National Center for Nuclear Research (NCBJ), Warsaw, Poland

    K. Klimaszewski, W. Krzemien, M. Mazurek, D. Melnychuk, A. Szabelski, A. Ukleja & W. Wislicki

  36. Horia Hulubei National Institute of Physics and Nuclear Engineering, Bucharest-Magurele, Romania

    L. Cojocariu, A. Ene, L. Giubega, A. Grecu, F. Maciuc, V. Placinta & M. Straticiuc

  37. Petersburg Nuclear Physics Institute NRC Kurchatov Institute (PNPI NRC KI), Gatchina, Russia

    G. Alkhazov, A. Andreianov, N. Bondar, A. Chubykin, V. Chulikov, A. Dzyuba, D. Ilin, A. Inglessi, K. Ivshin, S. Kotriakhova, P. Kravchenko, O. Maev, D. Maisuzenko, N. Sagidova, A. Solovev, I. Solovyev, A. Vorobyev & N. Voropaev

  38. Institute of Theoretical and Experimental Physics NRC Kurchatov Institute (ITEP NRC KI), Moscow, Russia

    I. Belyaev, A. Danilina, V. Egorychev, P. Fedin, D. Golubkov, P. Gorbounov, A. Konoplyannikov, T. Kvaratskheliya, V. Matiunin, T. Ovsiannikova, D. Pereima, D. Savrina, A. Semennikov & A. Smetkina

  39. Institute of Nuclear Physics, Moscow State University (SINP MSU), Moscow, Russia

    I. Belov, A. Berezhnoy, I. V. Gorelov, M. Korolev, A. Leflat, N. Nikitin, D. Savrina & V. Zhukov

  40. Institute for Nuclear Research of the Russian Academy of Sciences (INR RAS), Moscow, Russia

    A. Butkevich, S. Filippov, E. Gushchin, L. Kravchuk & S. Luchuk

  41. Yandex School of Data Analysis, Moscow, Russia

    K. Arzymatov, V. Belavin, M. Borisyak, T. Gaintseva, A. Philippov, S. Popov, F. Ratnikov & A. Ustyuzhanin

  42. Budker Institute of Nuclear Physics (SB RAS), Novosibirsk, Russia

    A. Bondar, S. Eidelman, P. Krokovny, V. Kudryavtsev, T. Maltsev, L. Shekhtman & V. Vorobyev

  43. Institute for High Energy Physics NRC Kurchatov Institute (IHEP NRC KI), Protvino, Russia

    A. Artamonov, K. Belous, Y. Guz, S. Kholodenko, V. Obraztsov, S. Poslavskii, V. Romanovskiy, M. Shapkin, O. Stenyakin & O. Yushchenko

  44. ICCUB, Universitat de Barcelona, Barcelona, Spain

    A. Alfonso Albero, A. Camboni, J. M. Fernandez-tenllado Arribas, P. Garcia Moreno, L. Garrido, P. Gironella Gironell, S. Gomez Fernandez, R. Graciani Diaz, E. Graugés, R. Manera Escalero, J. Mauricio, D. Sanchez Gonzalo & N. Valls Canudas

  45. Instituto Galego de Física de Altas Enerxías (IGFAE), Universidade de Santiago de Compostela, Santiago de Compostela, Spain

    B. Adeva, P. Baladron Rodriguez, O. Boente Garcia, A. Brea Rodriguez, A. Casais Vidal, V. Chobanova, X. Cid Vidal, J. Dalseno, L. Dieste Maronas, A. Fernandez Prieto, A. Gallas Torreira, B. Garcia Plana, A. Gioventù, J. Lomba Castro, D. Martinez Santos, C. J. Parkinson, M. Plo Casasus, C. Prouve, M. Romero Lamas, A. Romero Vidal, J. J. Saborido Silva, C. Santamarina Rios, S. Sellam, R. Vazquez Gomez & P. Vazquez Regueiro

  46. Instituto de Fisica Corpuscular, Centro Mixto Universidad de Valencia — CSIC, Valencia, Spain

    L. Henry, B. K. Jashal, F. Martinez Vidal, A. Oyanguren, C. Remon Alepuz & J. Ruiz Vidal

  47. European Organization for Nuclear Research (CERN), Geneva, Switzerland

    F. Alessio, P. Alvarez Cartelle, C. Bertella, M. P. Blago, A. Boyer, M. Brodski, C. Burr, J. Buytaert, W. Byczynski, D. H. Campora Perez, M. Cattaneo, G. Cavallero, Ph. Charpentier, S.-G. Chitic, G. Ciezarek, M. Clemencic, J. Closier, V. Coco, P. Collins, T. Colombo, G. Corti, B. Couturier, C. D’Ambrosio, P. d’Argent, H. Dijkstra, L. Dufour, P. Durante, T. Evans, M. Féo, P. Fernandez Declara, M. Ferro-Luzzi, R. Forty, M. Frank, C. Frei, W. Funk, S. Gambetta, C. Gaspar, C. Giugliano, E. L. Gkougkousis, L. A. Granado Cardoso, Y. Guz, T. Gys, C. Haen, J. Haimberger, C. Hasse, M. Hatch, A. M. Hennequin, R. Jacobsson, S. Jakobsen, D. Johnson, B. Jost, N. Jurik, M. Karacson, F. Keizer, R. D. Krawczyk, D. Lacarrere, R. Lindner, B. Malecki, S. Mariani, L. Martinazzoli, R. Matev, Z. Mathe, M. Mikhasenko, M. Milovanovic, D. S. Mitzel, M. Mulder, D. Müller, P. Muzzetto, N. Neufeld, N. S. Nolte, A. Oyanguren, P. R. Pais, T. Pajero, A. Pearce, M. Pepe Altarelli, J. Pinzino, F. Pisani, S. Ponce, D. Popov, L. Promberger, P. Roloff, T. Ruf, H. Schindler, B. Schmidt, A. Schopper, R. Schwemmer, A. Sergi, P. Seyfert, F. Stagni, S. Stahl, M. Szymanski, F. Teubert, E. Thomas, S. Tolk, A. Valassi, K. Wyllie & O. Zenaiev

  48. Institute of Physics, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland

    M. Bachmayer, A. Bay, V. Bellee, F. Blanc, S. A. Bouchiba, S. Celani, S. Cholak, M. De Cian, S. Ek-In, L. Ferreira Lopes, E. Graverini, G. Haefeli, V. S. Kirsebom, V. Macko, M. Marinangeli, P. Marino, T. Nakada, T. Nanut, T. D. Nguyen, C. Nguyen-Mau, G. Pietrzyk, F. Redi, A. B. Rodrigues, O. Schneider, S. Schulte, L. Shchutska, P. Stefko, M. E. Stramaglia, M. T. Tran, C. Trippl, A. Tully, M. Van Dijk, M. Vieites Diaz & E. Zaffaroni

  49. Physik-Institut, Universität Zürich, Zürich, Switzerland

    C. Abellán Beteta, M. Atzeni, R. Bernet, C. Betancourt, Ia. Bezshyiko, A. Buonaura, D. De Simone, V. Denysenko, J. Eschle, M. Ferrillo, J. García Pardiñas, D. Lancierini, O. Lantwin, G. Loustau, A. Mathad, K. Müller, P. Owen, A. Puig Navarro, N. Serra, R. Silva Coutinho, O. Steinkamp, A. Vollhardt & Z. Wang

  50. NSC Kharkiv Institute of Physics and Technology (NSC KIPT), Kharkiv, Ukraine

    A. Dovbnya & S. Kandybei

  51. Institute for Nuclear Research of the National Academy of Sciences (KINR), Kyiv, Ukraine

    V. Dobishuk, S. Koliiev, I. Kostiuk, O. Kot & V. Pugatch

  52. University of Birmingham, Birmingham, U.K.

    S. Bifani, R. Calladine, G. Chatzikonstantinidis, N. Cooke, N. Farley, J. Plews, A. Sergi, M. W. Slater, P. N. Swallow, N. K. Watson & K. A. Zarebski

  53. H.H. Wills Physics Laboratory, University of Bristol, Bristol, U.K.

    M. Adinolfi, S. Bhasin, P. Camargo Magalhaes, M. G. Chapman, R. Lane, S. Maddrell-Mander, L. R. Madhan Mohan, P. Naik, D. P. O’Hanlon, K. Petridis, G. J. Pomery, J. H. Rademacker, J. J. Velthuis, R. Wang, B. D. C. Westhenry & M. Whitehead

  54. Cavendish Laboratory, University of Cambridge, Cambridge, U.K.

    M. O. Bettler, F. C. R. Bishop, H. V. Cliff, B. Delaney, V. Gibson, S. C. Haines, C. R. Jones, F. Keizer, G. H. Lovell, J. G. Smeaton, I. Williams & S. A. Wotton

  55. Department of Physics, University of Warwick, Coventry, U.K.

    J. J. Back, T. Blake, A. Brossa Gonzalo, M. F. Cicala, C. M. Costa Sobral, L. M. Garcia Martin, T. Gershon, R. J. Hunter, T. P. Jones, M. Kenzie, M. Kreps, T. Latham, O. Lupton, E. Millard, A. G. Morris, B. Pagare, M. Ramos Pernas, N. Sahoo & M. Vesterinen

  56. STFC Rutherford Appleton Laboratory, Didcot, U.K.

    S. Easo, R. Nandakumar, A. Papanestis, S. Ricciardi & F. F. Wilson

  57. School of Physics and Astronomy, University of Edinburgh, Edinburgh, U.K.

    P. E. L. Clarke, R. Currie, S. Eisenhardt, S. Gambetta, K. Gizdov, S. E. Mitchell, F. Muheim, M. Needham, S. Petrucci, G. Robertson, M. R. J. Williams & J. B. Zonneveld

  58. School of Physics and Astronomy, University of Glasgow, Glasgow, U.K.

    M. Alexander, D. Bobulska, G. Coombs, L. Douglas, L. Eklund, D. A. Friday, I. Longstaff, M. Schiller, F. J. P. Soler, P. Spradlin & M. Traill

  59. Oliver Lodge Laboratory, University of Liverpool, Liverpool, U.K.

    T. Ackernley, T. J. V. Bowcock, G. Casse, A. J. Chadwick, C. A. Chavez Barajas, K. Dreimanis, S. Farry, V. Franco Lima, T. Halewood-leagas, T. Harrison, K. Hennessy, D. Hutchcroft, P. J. Marshall, J. V. Mead, K. Rinnert, E. Rodrigues, T. Shears, K. A. Thomson, E. Vilella Figueras, H. M. Wark & L. E. Yeomans

  60. Imperial College London, London, U.K.

    S. Baker, W. Barter, M. Birch, M. J. Bradley, A. Golutvin, M. Hecker, F. Kress, T. Lin, M. McCann, R. D. Moise, R. Newcombe, M. Patel, M. Smith, M. J. Tilley & D. Websdale

  61. Department of Physics and Astronomy, University of Manchester, Manchester, U.K.

    Z. Aliouche, R. J. Barlow, S. Borghi, J. L. Cobbledick, A. Davis, O. De Aguiar Francisco, S. De Capua, D. Dutta, C. Fitzpatrick, E. Gersabeck, M. Gersabeck, L. Grillo, M. Hilton, G. Lafferty, J. J. Lane, A. Lupato, T. H. Mcgrath, A. McNab, B. Mitreska, D. Murray, Y. Pan, C. Parkes, G. Sarpis, P. Svihra, S. Taneja, D. J. White & G. Zunica

  62. Department of Physics, University of Oxford, Oxford, U.K.

    M. Bjørn, K. M. Fischer, B. R. Gruberg Cazon, T. H. Hancock, N. Harnew, D. Hill, M. John, L. Li, S. Malde, R. A. Mohammed, C. H. Murphy, M. Pili, H. Pullen, V. Renaudin, A. Rollings, L. G. Scantlebury Smead, J. C. Smallwood, F. Suljik, G. Wilkinson & Y. Zhang

  63. Massachusetts Institute of Technology, Cambridge, MA, U.S.A.

    T. Boettcher, D. C. Craik, O. Kitouni, C. Weisser & M. Williams

  64. University of Cincinnati, Cincinnati, OH, U.S.A.

    S. Akar, P. Ilten, B. Meadows, C. Pappenheimer, M. D. Sokoloff, M. Stahl & D. Vieira

  65. University of Maryland, College Park, MD, U.S.A.

    S. Braun, M. Franco Sevilla, P. M. Hamilton, A. Jawahery, W. Parker, Y. Sun & Z. Yang

  66. Los Alamos National Laboratory (LANL), Los Alamos, U.S.A.

    J. Crkovská, C. L. Da Silva, C. T. Dean, J. M. Durham, E. Epple, G. J. Kunde, X. Li & H. Van Hecke

  67. Syracuse University, Syracuse, NY, U.S.A.

    M. Artuso, B. Batsukh, A. Beiter, H. C. Bernstein, S. Blusk, S. Ely, K. E. Kim, Z. Li, X. Liang, R. Mountain, M. E. Olivares, T. T. H. Pham, M. Poliakova, I. Polyakov, M. S. Rudolph, J. D. Shupperd, T. Skwarnicki, S. Stone, A. Venkateswaran, M. Wilkinson, H. Wu, Y. Yao & X. Yuan

  68. School of Physics and Astronomy, Monash University, Melbourne, Australia

    U. Egede, T. Hadavizadeh & M. Williams

  69. Pontifícia Universidade Católica do Rio de Janeiro (PUC-Rio), Rio de Janeiro, Brazil

    C. Göbel & F. Goncalves Abrantes

  70. Physics and Micro Electronic College, Hunan University, Changsha City, China

    J. Yu

  71. Guangdong Provencial Key Laboratory of Nuclear Science, Institute of Quantum Matter, South China Normal University, Guangzhou, China

    J. Hu, H. Li & G. Liu

  72. School of Physics and Technology, Wuhan University, Wuhan, China

    L. Bian, H. Cai, B. Dey, B. Fang, X. Huang, L. Sun & J. Wang

  73. Departamento de Fisica, Universidad Nacional de Colombia, Bogota, Colombia

    D. A. Milanes, I. A. Monroy & J. A. Rodriguez Lopez

  74. Universität Bonn — Helmholtz-Institut für Strahlen und Kernphysik, Bonn, Germany

    A. B. Morris, S. Neubert, M. Sarpis & N. Skidmore

  75. Institut für Physik, Universität Rostock, Rostock, Germany

    N. Meinert, H. Viemann & R. Waldi

  76. INFN Sezione di Perugia, Perugia, Italy

    V. Duk & M. Piccini

  77. Van Swinderen Institute, University of Groningen, Groningen, Netherlands

    K. De Bruyn, C. J. G. Onderwater & M. van Veghel

  78. Universiteit Maastricht, Maastricht, Netherlands

    J. A. de Vries, M. Merk & C. J. Pawley

  79. National Research Centre Kurchatov Institute, Moscow, Russia

    A. Malinin, A. Petrov & V. Shevchenko

  80. National University of Science and Technology “MISIS”, Moscow, Russia

    F. Baryshnikov, S. Didenko, A. Golutvin, S. Gromov, A. Ishteev, A. Kondybayeva, O. Lantwin, S. Legotin, N. Polukhina, D. Saranin, I. Shchemerov, E. Shmanin, O. Steinkamp, D. Strekalina, E. Trifonova, E. Ursov & E. van Herwijnen

  81. National Research University Higher School of Economics, Moscow, Russia

    A. Boldyrev, D. Derkach, M. Hushchyn, M. Karpov, N. Kazeev, A. Maevskiy, F. Ratnikov, A. Ryzhikov & A. Ustyuzhanin

  82. National Research Tomsk Polytechnic University, Tomsk, Russia

    A. Kharisova, G. Panshin, S. Strokov & A. Vagner

  83. DS4DS, La Salle, Universitat Ramon Llull, Barcelona, Spain

    M. Calvo Gomez, E. Golobardes & X. Vilasis-Cardona

  84. University of Michigan, Ann Arbor, U.S.A.

    C. A. Aidala, W. Dean, S. H. Lee, K. R. Mattioli, C. Nunez, J. D. Roth & D. M. Shangase

  85. Universidade Federal do Triângulo Mineiro (UFTM), Uberaba, MG, Brazil

    A. Gomes

  86. Laboratoire Leprince-Ringuet, Palaiseau, France

    F. Fleuret & E. Maurice

  87. P.N. Lebedev Physical Institute, Russian Academy of Science (LPI RAS), Moscow, Russia

    N. Polukhina & M. Zavertyaev

  88. Università di Bari, Bari, Italy

    L. Congedo, M. De Serio, M. Pappagallo & S. Simone

  89. Università di Bologna, Bologna, Italy

    F. Betti, L. Capriotti, A. Carbone, F. Ferrari, D. Galli, S. Maccolini, D. Manuzzi, C. Patrignani & S. Zucchelli

  90. Università di Cagliari, Cagliari, Italy

    F. Dettori, G. Manca, R. Oldeman & B. Saitta

  91. Università di Ferrara, Ferrara, Italy

    R. Calabrese, M. Fiorini, C. Giugliano, E. Luppi, L. Minzoni, I. Neri, L. L. Pappalardo, I. Skiba & L. Tomassetti

  92. Università di Firenze, Firenze, Italy

    S. Mariani

  93. Università di Genova, Genova, Italy

    M. Bartolini, R. Cardinale, F. Fontanelli & A. Petrolini

  94. Università di Milano Bicocca, Milano, Italy

    M. Calvi, S. Capelli, P. Carniti, D. Fazzini, C. Gotti, L. Martinazzoli, M. Martinelli, S. Meloni & E. B. Shields

  95. Università di Roma Tor Vergata, Roma, Italy

    M. Giovannetti & E. Santovetti

  96. AGH — University of Science and Technology, Faculty of Computer Science, Electronics and Telecommunications, Kraków, Poland

    W. Kucewicz

  97. Università di Padova, Padova, Italy

    D. Lucchesi

  98. Università di Pisa, Pisa, Italy

    G. Punzi & G. Tuci

  99. Università degli Studi di Milano, Milano, Italy

    D. Marangotto, N. Neri & E. Spadaro Norella

  100. Università di Urbino, Urbino, Italy

    M. Veltri

  101. Università della Basilicata, Potenza, Italy

    C. Satriano

  102. Scuola Normale Superiore, Pisa, Italy

    A. Lusiani, M. J. Morello & T. Pajero

  103. Università di Modena e Reggio Emilia, Modena, Italy

    A. Bizzeti

  104. Università di Siena, Siena, Italy

    F. Lazzari

  105. MSU — Iligan Institute of Technology (MSU-IIT), Iligan, Philippines

    J. Maratas

  106. Novosibirsk State University, Novosibirsk, Russia

    S. Eidelman, P. Krokovny, V. Kudryavtsev, T. Maltsev, L. Shekhtman & V. Vorobyev

Authors
  1. R. Aaij
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  2. C. Abellán Beteta
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  3. T. Ackernley
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  4. B. Adeva
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  5. M. Adinolfi
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  6. H. Afsharnia
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  7. C. A. Aidala
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  8. S. Aiola
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