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Search for mixing-induced $C P$ violation using partial reconstruction of ${\bar{B}}^{0} \to D^{* +} X ℓ^{-} {\bar{ν}}_{ℓ}$ and kaon tagging

J. P. Lees¹, V. Poireau¹, V. Tisserand¹, E. Grauges², A. Palano^3a,3b, G. Eigen⁴, B. Stugu⁴, D. N. Brown⁵, L. T. Kerth⁵ et al. (The BABAR Collaboration)

L. T. Kerth⁵, Yu. G. Kolomensky⁵, M. J. Lee⁵, G. Lynch⁵, H. Koch⁶, T. Schroeder⁶, C. Hearty⁷, T. S. Mattison⁷, J. A. McKenna⁷, R. Y. So⁷, A. Khan⁸, V. E. Blinov^9a,9b,9c, A. R. Buzykaev^9a, V. P. Druzhinin^9a,9b, V. B. Golubev^9a,9b, E. A. Kravchenko^9a,9b, A. P. Onuchin^9a,9b,9c, S. I. Serednyakov^9a,9b, Yu. I. Skovpen^9a,9b, E. P. Solodov^9a,9b, K. Yu. Todyshev^9a,9b, A. J. Lankford¹⁰, B. Dey¹¹, J. W. Gary¹¹, O. Long¹¹, M. Franco Sevilla¹², T. M. Hong¹², D. Kovalskyi¹², J. D. Richman¹², C. A. West¹², A. M. Eisner¹³, W. S. Lockman¹³, W. Panduro Vazquez¹³, B. A. Schumm¹³, A. Seiden¹³, D. S. Chao¹⁴, C. H. Cheng¹⁴, B. Echenard¹⁴, K. T. Flood¹⁴, D. G. Hitlin¹⁴, J. Kim¹⁴, T. S. Miyashita¹⁴, P. Ongmongkolkul¹⁴, F. C. Porter¹⁴, M. Röhrken¹⁴, R. Andreassen¹⁵, Z. Huard¹⁵, B. T. Meadows¹⁵, B. G. Pushpawela¹⁵, M. D. Sokoloff¹⁵, L. Sun¹⁵, W. T. Ford¹⁶, A. Gaz¹⁶, J. G. Smith¹⁶, S. R. Wagner¹⁶, R. Ayad^17,†, W. H. Toki¹⁷, B. Spaan¹⁸, D. Bernard¹⁹, M. Verderi¹⁹, S. Playfer²⁰, D. Bettoni^21a, C. Bozzi^21a, R. Calabrese^21a,21b, G. Cibinetto^21a,21b, E. Fioravanti^21a,21b, I. Garzia^21a,21b, E. Luppi^21a,21b, L. Piemontese^21a, V. Santoro^21a, A. Calcaterra²², R. de Sangro²², G. Finocchiaro²², S. Martellotti²², P. Patteri²², I. M. Peruzzi²², M. Piccolo²², A. Zallo²², R. Contri^23a,23b, M. R. Monge^23a,23b, S. Passaggio^23a, C. Patrignani^23a,23b, E. Robutti^23a, B. Bhuyan²⁴, V. Prasad²⁴, A. Adametz²⁵, U. Uwer²⁵, H. M. Lacker²⁶, U. Mallik²⁷, C. Chen²⁸, J. Cochran²⁸, S. Prell²⁸, H. Ahmed²⁹, A. V. Gritsan³⁰, N. Arnaud³¹, M. Davier³¹, D. Derkach³¹, G. Grosdidier³¹, F. Le Diberder³¹, A. M. Lutz³¹, B. Malaescu^31,‡, P. Roudeau³¹, A. Stocchi³¹, G. Wormser³¹, D. J. Lange³², D. M. Wright³², J. P. Coleman³³, J. R. Fry³³, E. Gabathuler³³, D. E. Hutchcroft³³, D. J. Payne³³, C. Touramanis³³, A. J. Bevan³⁴, F. Di Lodovico³⁴, R. Sacco³⁴, G. Cowan³⁵, D. N. Brown³⁶, C. L. Davis³⁶, A. G. Denig³⁷, M. Fritsch³⁷, W. Gradl³⁷, K. Griessinger³⁷, A. Hafner³⁷, K. R. Schubert³⁷, R. J. Barlow^38,§, G. D. Lafferty³⁸, R. Cenci³⁹, B. Hamilton³⁹, A. Jawahery³⁹, D. A. Roberts³⁹, R. Cowan⁴⁰, R. Cheaib⁴¹, P. M. Patel^41,*, S. H. Robertson⁴¹, N. Neri^42a, F. Palombo^42a,42b, L. Cremaldi⁴³, R. Godang^43,∥, D. J. Summers⁴³, M. Simard⁴⁴, P. Taras⁴⁴, G. De Nardo^45a,45b, G. Onorato^45a,45b, C. Sciacca^45a,45b, G. Raven⁴⁶, C. P. Jessop⁴⁷, J. M. LoSecco⁴⁷, K. Honscheid⁴⁸, R. Kass⁴⁸, M. Margoni^49a,49b, M. Morandin^49a, M. Posocco^49a, M. Rotondo^49a, G. Simi^49a,49b, F. Simonetto^49a,49b, R. Stroili^49a,49b, S. Akar⁵⁰, E. Ben-Haim⁵⁰, M. Bomben⁵⁰, G. R. Bonneaud⁵⁰, H. Briand⁵⁰, G. Calderini⁵⁰, J. Chauveau⁵⁰, Ph. Leruste⁵⁰, G. Marchiori⁵⁰, J. Ocariz⁵⁰, M. Biasini^51a,51b, E. Manoni^51a, A. Rossi^51a, C. Angelini^52a,52b, G. Batignani^52a,52b, S. Bettarini^52a,52b, M. Carpinelli^52a,52b,¶, G. Casarosa^52a,52b, M. Chrzaszcz^52a, F. Forti^52a,52b, M. A. Giorgi^52a,52b, A. Lusiani^52a,52c, B. Oberhof^52a,52b, E. Paoloni^52a,52b, M. Rama^52a, G. Rizzo^52a,52b, J. J. Walsh^52a, D. Lopes Pegna⁵³, J. Olsen⁵³, A. J. S. Smith⁵³, F. Anulli^54a, R. Faccini^54a,54b, F. Ferrarotto^54a, F. Ferroni^54a,54b, M. Gaspero^54a,54b, A. Pilloni^54a,54b, G. Piredda^54a, C. Bünger⁵⁵, S. Dittrich⁵⁵, O. Grünberg⁵⁵, M. Hess⁵⁵, T. Leddig⁵⁵, C. Voß⁵⁵, R. Waldi⁵⁵, T. Adye⁵⁶, E. O. Olaiya⁵⁶, F. F. Wilson⁵⁶, S. Emery⁵⁷, G. Vasseur⁵⁷, D. Aston⁵⁸, D. J. Bard⁵⁸, C. Cartaro⁵⁸, M. R. Convery⁵⁸, J. Dorfan⁵⁸, G. P. Dubois-Felsmann⁵⁸, W. Dunwoodie⁵⁸, M. Ebert⁵⁸, R. C. Field⁵⁸, B. G. Fulsom⁵⁸, M. T. Graham⁵⁸, C. Hast⁵⁸, W. R. Innes⁵⁸, P. Kim⁵⁸, D. W. G. S. Leith⁵⁸, S. Luitz⁵⁸, V. Luth⁵⁸, D. B. MacFarlane⁵⁸, D. R. Muller⁵⁸, H. Neal⁵⁸, T. Pulliam⁵⁸, B. N. Ratcliff⁵⁸, A. Roodman⁵⁸, R. H. Schindler⁵⁸, A. Snyder⁵⁸, D. Su⁵⁸, M. K. Sullivan⁵⁸, J. Va’vra⁵⁸, W. J. Wisniewski⁵⁸, H. W. Wulsin⁵⁸, M. V. Purohit⁵⁹, J. R. Wilson⁵⁹, A. Randle-Conde⁶⁰, S. J. Sekula⁶⁰, M. Bellis⁶¹, P. R. Burchat⁶¹, E. M. T. Puccio⁶¹, M. S. Alam⁶², J. A. Ernst⁶², R. Gorodeisky⁶³, N. Guttman⁶³, D. R. Peimer⁶³, A. Soffer⁶³, S. M. Spanier⁶⁴, J. L. Ritchie⁶⁵, R. F. Schwitters⁶⁵, J. M. Izen⁶⁶, X. C. Lou⁶⁶, F. Bianchi^67a,67b, F. De Mori^67a,67b, A. Filippi^67a, D. Gamba^67a,67b, L. Lanceri^68a,68b, L. Vitale^68a,68b, F. Martinez-Vidal⁶⁹, A. Oyanguren⁶⁹, J. Albert⁷⁰, Sw. Banerjee⁷⁰, A. Beaulieu⁷⁰, F. U. Bernlochner⁷⁰, H. H. F. Choi⁷⁰, G. J. King⁷⁰, R. Kowalewski⁷⁰, M. J. Lewczuk⁷⁰, T. Lueck⁷⁰, I. M. Nugent⁷⁰, J. M. Roney⁷⁰, R. J. Sobie⁷⁰, N. Tasneem⁷⁰, T. J. Gershon⁷¹, P. F. Harrison⁷¹, T. E. Latham⁷¹, H. R. Band⁷², S. Dasu⁷², Y. Pan⁷², R. Prepost⁷², and S. L. Wu⁷² (The BABAR Collaboration)

¹Laboratoire d’Annecy-le-Vieux de Physique des Particules (LAPP), Université de Savoie, CNRS/IN2P3, F-74941 Annecy-Le-Vieux, France
²Universitat de Barcelona, Facultat de Fisica, Departament ECM, E-08028 Barcelona, Spain
^3aINFN Sezione di Bari, I-70126 Bari, Italy
^3bDipartimento di Fisica, Università di Bari, I-70126 Bari, Italy
⁴University of Bergen, Institute of Physics, N-5007 Bergen, Norway
⁵Lawrence Berkeley National Laboratory and University of California, Berkeley, California 94720, USA
⁶Ruhr Universität Bochum, Institut für Experimentalphysik 1, D-44780 Bochum, Germany
⁷University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z1
⁸Brunel University, Uxbridge, Middlesex UB8 3PH, United Kingdom
^9aBudker Institute of Nuclear Physics SB RAS, Novosibirsk 630090, Russia
^9bRussia Novosibirsk State University, Novosibirsk 630090, Russia
^9cRussia Novosibirsk State Technical University, Novosibirsk 630092, Russia
¹⁰University of California at Irvine, Irvine, California 92697, USA
¹¹University of California at Riverside, Riverside, California 92521, USA
¹²University of California at Santa Barbara, Santa Barbara, California 93106, USA
¹³University of California at Santa Cruz, Institute for Particle Physics, Santa Cruz, California 95064, USA
¹⁴California Institute of Technology, Pasadena, California 91125, USA
¹⁵University of Cincinnati, Cincinnati, Ohio 45221, USA
¹⁶University of Colorado, Boulder, Colorado 80309, USA
¹⁷Colorado State University, Fort Collins, Colorado 80523, USA
¹⁸Technische Universität Dortmund, Fakultät Physik, D-44221 Dortmund, Germany
¹⁹Laboratoire Leprince-Ringuet, Ecole Polytechnique, CNRS/IN2P3, F-91128 Palaiseau, France
²⁰University of Edinburgh, Edinburgh EH9 3JZ, United Kingdom
^21aINFN Sezione di Ferrara, I-44122 Ferrara, Italy
^21bDipartimento di Fisica e Scienze della Terra, Università di Ferrara, I-44122 Ferrara, Italy
²²INFN Laboratori Nazionali di Frascati, I-00044 Frascati, Italy
^23aINFN Sezione di Genova, I-16146 Genova, Italy
^23bDipartimento di Fisica, Università di Genova, I-16146 Genova, Italy
²⁴Indian Institute of Technology Guwahati, Guwahati, Assam, 781 039, India
²⁵Universität Heidelberg, Physikalisches Institut, D-69120 Heidelberg, Germany
²⁶Humboldt-Universität zu Berlin, Institut für Physik, D-12489 Berlin, Germany
²⁷University of Iowa, Iowa City, Iowa 52242, USA
²⁸Iowa State University, Ames, Iowa 50011-3160, USA
²⁹Physics Department, Jazan University, Jazan 22822, Kingdom of Saudi Arabia
³⁰Johns Hopkins University, Baltimore, Maryland 21218, USA
³¹Laboratoire de l’Accélérateur Linéaire, IN2P3/CNRS et Université Paris-Sud 11, Centre Scientifique d’Orsay, F-91898 Orsay Cedex, France
³²Lawrence Livermore National Laboratory, Livermore, California 94550, USA
³³University of Liverpool, Liverpool L69 7ZE, United Kingdom
³⁴Queen Mary, University of London, London E1 4NS, United Kingdom
³⁵University of London, Royal Holloway and Bedford New College, Egham, Surrey TW20 0EX, United Kingdom
³⁶University of Louisville, Louisville, Kentucky 40292, USA
³⁷Johannes Gutenberg-Universität Mainz, Institut für Kernphysik, D-55099 Mainz, Germany
³⁸University of Manchester, Manchester M13 9PL, United Kingdom
³⁹University of Maryland, College Park, Maryland 20742, USA
⁴⁰Massachusetts Institute of Technology, Laboratory for Nuclear Science, Cambridge, Massachusetts 02139, USA
⁴¹McGill University, Montréal, Québec, Canada H3A 2T8
^42aINFN Sezione di Milano, I-20133 Milano, Italy
^42bDipartimento di Fisica, Università di Milano, I-20133 Milano, Italy
⁴³University of Mississippi, University, Mississippi 38677, USA
⁴⁴Université de Montréal, Physique des Particules, Montréal, Québec, Canada H3C 3J7
^45aINFN Sezione di Napoli, I-80126 Napoli, Italy
^45bDipartimento di Scienze Fisiche, Università di Napoli Federico II, I-80126 Napoli, Italy
⁴⁶NIKHEF, National Institute for Nuclear Physics and High Energy Physics, NL-1009 DB Amsterdam, The Netherlands
⁴⁷University of Notre Dame, Notre Dame, Indiana 46556, USA
⁴⁸Ohio State University, Columbus, Ohio 43210, USA
^49aINFN Sezione di Padova, I-35131 Padova, Italy
^49bDipartimento di Fisica, Università di Padova, I-35131 Padova, Italy
⁵⁰Laboratoire de Physique Nucléaire et de Hautes Energies, IN2P3/CNRS, Université Pierre et Marie Curie-Paris6, Université Denis Diderot-Paris7, F-75252 Paris, France
^51aINFN Sezione di Perugia, I-06123 Perugia, Italy
^51bDipartimento di Fisica, Università di Perugia, I-06123 Perugia, Italy
^52aINFN Sezione di Pisa, I-56127 Pisa, Italy
^52bDipartimento di Fisica, Università di Pisa, I-56127 Pisa, Italy
^52cScuola Normale Superiore di Pisa, I-56127 Pisa, Italy
⁵³Princeton University, Princeton, New Jersey 08544, USA
^54aINFN Sezione di Roma, I-00185 Roma, Italy
^54bDipartimento di Fisica, Università di Roma La Sapienza, I-00185 Roma, Italy
⁵⁵Universität Rostock, D-18051 Rostock, Germany
⁵⁶Rutherford Appleton Laboratory, Chilton, Didcot, Oxfordshire, OX11 0QX, United Kingdom
⁵⁷CEA, Irfu, SPP, Centre de Saclay, F-91191 Gif-sur-Yvette, France
⁵⁸SLAC National Accelerator Laboratory, Stanford, California 94309 USA
⁵⁹University of South Carolina, Columbia, South Carolina 29208, USA
⁶⁰Southern Methodist University, Dallas, Texas 75275, USA
⁶¹Stanford University, Stanford, California 94305-4060, USA
⁶²State University of New York, Albany, New York 12222, USA
⁶³Tel Aviv University, School of Physics and Astronomy, Tel Aviv 69978, Israel
⁶⁴University of Tennessee, Knoxville, Tennessee 37996, USA
⁶⁵University of Texas at Austin, Austin, Texas 78712, USA
⁶⁶University of Texas at Dallas, Richardson, Texas 75083, USA
^67aINFN Sezione di Torino, I-10125 Torino, Italy
^67bDipartimento di Fisica, Università di Torino, I-10125 Torino, Italy
^68aINFN Sezione di Trieste, I-34127 Trieste, Italy
^68bDipartimento di Fisica, Università di Trieste, I-34127 Trieste, Italy
⁶⁹IFIC, Universitat de Valencia-CSIC, E-46071 Valencia, Spain
⁷⁰University of Victoria, Victoria, British Columbia, Canada V8W 3P6
⁷¹Department of Physics, University of Warwick, Coventry CV4 7AL, United Kingdom
⁷²University of Wisconsin, Madison, Wisconsin 53706, USA

^*Deceased.
^†Present address: University of Tabuk, Tabuk 71491, Saudi Arabia.
^‡Present address: Laboratoire de Physique Nucléaire et de Hautes Energies, IN2P3/CNRS, F-75252 Paris, France.
^§Present address: University of Huddersfield, Huddersfield HD1 3DH, United Kingdom.
^∥Present address: University of South Alabama, Mobile, Alabama 36688, USA.
^¶Also at Università di Sassari, I-07100 Sassari, Italy.

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Phys. Rev. D 93, 032001 – Published 8 February, 2016

DOI: https://doi.org/10.1103/PhysRevD.93.032001

Abstract

We describe in detail a previously published measurement of $C P$ violation in $B^{0}$ - ${\bar{B}}^{0}$ oscillations, based on an integrated luminosity of $425.7 {fb}^{- 1}$ collected by the BABAR experiment at the PEPII collider. We apply a novel technique to a sample of about 6 million ${\bar{B}}^{0} \to D^{* +} ℓ^{-} \bar{ν_{ℓ}}$ decays selected with partial reconstruction of the $D^{* +}$ meson. The charged lepton identifies the flavor of one $B$ meson at its decay time, the flavor of the other $B$ is determined by kaon tagging. We determine a $C P$ violating asymmetry $A_{C P} = (N (B^{0} B^{0}) - N ({\bar{B}}^{0} {\bar{B}}^{0})) / (N (B^{0} B^{0}) + N ({\bar{B}}^{0} {\bar{B}}^{0})) = (0.06 \pm 0.1 7_{- 0.32}^{+ 0.38}) %$ corresponding to $Δ_{C P} = 1 - | q / p | = (0.29 \pm 0.8 4_{- 1.61}^{+ 1.88}) \times 1 0^{- 3}$ . This measurement is consistent and competitive with those obtained at the $B$ factories with dilepton events.

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References (25)

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Search for mixing-induced $C P$ violation using partial reconstruction of ${\bar{B}}^{0} \to D^{* +} X ℓ^{-} {\bar{ν}}_{ℓ}$ and kaon tagging

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Search for mixing-induced CP violation using partial reconstruction of B¯0→D*+Xℓ−ν¯ℓ and kaon tagging

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Search for mixing-induced $C P$ violation using partial reconstruction of ${\bar{B}}^{0} \to D^{* +} X ℓ^{-} {\bar{ν}}_{ℓ}$ and kaon tagging