First observation of CP violation in the decays of B(s)0 mesons.

  title={First observation of CP violation in the decays of B(s)0 mesons.},
  author={R. Aaij and C. Abell{\'a}n Beteta and Bernardo Adeva and Marco Adinolfi and C. Adrover and A. A. Affolder and Ziad Ajaltouni and Johannes Albrecht and Federico Alessio and Michael Thomas Alexander and S. Ali and Georgy Alkhazov and P. Alvarez Cartelle and A. A. Alves and S. Amato and Silvia Amerio and Y. Amhis and Lucio Anderlini and J. R. Anderson and Rolf E. Andreassen and Robert B. Appleby and O. Aquines Gutierrez and Flavio Archilli and Alexander Artamonov and Marina Artuso and Elie Aslanides and Giulio Auriemma and Sebastian Bachmann and John Back and Clarissa Baesso and Vladislav Balagura and Wander Baldini and R. J. Barlow and Colin Barschel and Sergey Barsuk and William Barter and Th. S. Bauer and Aurelio Bay and John Keith Beddow and F Bedeschi and I. Bediaga and Sergey Belogurov and Konstantin Belous and I. Belyaev and E. Ben-Haim and Giovanni Bencivenni and Sean Benson and Jack Benton and Alexander V. Berezhnoy and Roland Bernet and Marc-Olivier Bettler and Martin van Beuzekom and Anna Bie{\~n} and Simone Bifani and Thomas Bird and Andrea Bizzeti and P{\aa}l Marius Bj{\o}rnstad and Thomas Blake and Fr{\'e}d{\'e}ric Blanc and Johan Blouw and Steven Blusk and Valerio Bocci and Alexander E. Bondar and Nikolay Bondar and W M Bonivento and Silvia Borghi and Alessandra Borgia and Themis Bowcock and Espen Eie Bowen and C. Bozzi and T. Brambach and Jo van den Brand and Jo{\"e}l Bressieux and David Brett and Markward Britsch and Thomas Britton and N. Brook and Henry Brown and Ion Burducea and Aleksander Bursche and G. Busetto and Jan A. N. Buytaert and Sandro Cadeddu and Olivier Callot and Marta Calvi and M{\'i}riam Calvo G{\'o}mez and Alessandro Camboni and Pierluigi Campana and Daniel Hugo C{\'a}mpora P{\'e}rez and A. Carbone and Graciela Carboni and Roberta Cardinale and Alessandro Cardini and H. Carranza-Mejia and Laurence Carson and K. Carvalho Akiba and Gianluigi Casse and Luc{\'i}a Castillo Garc{\'i}a and Marco Cattaneo and Ch. Cauet and M. J. Charles and Ph. Charpentier and P. F. Chen and Nicola Chiapolini and M. Chrzaszcz and Krzysztof Ciba and Xabier Cid Vidal and Gregory Max Ciezarek and P. E. L. Clarke and Marco Clemencic and Harry Victor Cliff and Joel Closier and Carmen Coca and Victor Coco and Julien Cogan and Eric Cogneras and Paula Collins and Albert Comerma-Montells and Andrea Contu and Andrew Cook and M. Coombes and Samuel Coquereau and Gloria Corti and Benjamin Couturier and G. Cowan and Daniel C. Craik and Samuel Cunliffe and Robert Currie and Carmelo D’Ambrosio and P. N. Y. David and P. N. Y. David and Adam C. S. Davis and Ida de Bonis and Kristof De Bruyn and Stefano de Capua and M. De Cian and J. M. De Miranda and Luciane Carvalho de Paula and W. De Silva and Patrizia de Simone and Daniel Decamp and Mirko Deckenhoff and Luca Del Buono and Nicolas D{\'e}l{\'e}age and Denis Derkach and Olivier Deschamps and Francesco Dettori and A Di Canto and Francesco Di Ruscio and H. B. Dijkstra and M. Dogaru and S. Domingo Donleavy and Francesca Dordei and A. Dosil Su{\'a}rez and David Dossett and Anatoliy Dovbnya and Fr{\'e}d{\'e}ric Dupertuis and Rustem Dzhelyadin and Agnieszka Dziurda and Alexey Dzyuba and Sajan Easo and Ulrik Egede and Victor Egorychev and Semen Eidelman and Daan van Eijk and Stephan Eisenhardt and Ulrich Eitschberger and Robert Jan Ekelhof and Lars Eklund and I. El Rifai and Ch. Elsasser and D. Elsby and Antonio Falabella and Christian F{\"a}rber and Gemma Fardell and Chiara Farinelli and Stephen Farry and Vincent Fave and D. P. S. Ferguson and V{\'i}ctor Fern{\'a}ndez Albor and F. Ferreira Rodrigues and Massimiliano Ferro-Luzzi and Sergey Filippov and Marco Fiore and Conor Fitzpatrick and Marianna Fontana and Flavio Fontanelli and Roger W Forty and Oscar De Aguiar Francisco and M. Frank and Christopher M. Frei and Maddalena Frosini and Silvia Furcas and Emiliano Furfaro and Abraham Gallas Torreira and Domenico Galli and Miriam Gandelman and Paolo Gandini and Y. Y. Gao and Justin Garofoli and Paola Garosi and J. Garra Tic{\'o} and Ll. Garrido and Clara Gaspar and R. Gauld and Evelina Mihova Gersabeck and M. Gersabeck and Tim Gershon and Ph. Ghez and Val Gibson and Vladimir Vava Gligorov and Carla G{\"o}bel and Dmitry Golubkov and Andrey Golutvin and Aldrin V. Gomes and Hamish Gordon and M. Grabalosa G{\'a}ndara and Ricardo Graciani Diaz and L. A. Granado Cardoso and Eugeni Grauges and Giacomo Graziani and Alexandru Tudor Grecu and Emma Greening and Sj Gregson and Peter Noel Griffith and Oliver Gr{\"u}nberg and Bing Gui and Evgeny Gushchin and Yu. Guz and Thierry Gys and C. Hadjivasiliou and Guido Haefeli and Christophe Haen and Susan Carol Haines and Samuel Hall and Thomas Hampson and Stephanie Hansmann-Menzemer and Neville Harnew and Samuel Thomas Harnew and Jonathan Harrison and Thomas Hartmann and J. J. He and Veerle Heijne and Karol Hennessy and Pierre Henrard and J. A. Hernando Morata and Eric van Herwijnen and E. Hicks and Donal Hill and Mostafa Hoballah and P. H. Hopchev and Plamen Hristov Hopchev and Wouter Hulsbergen and Paul Hunt and T. Huse and Nur Hussain and David Hutchcroft and Daniel Hynds and Viktor Iakovenko and Marek Idzik and Philip Ilten and R. Jacobsson and Andreas Jaeger and Eddy Jans and P. Jaton and Abolhassan Jawahery and F. F. Jing and M. John and D. Johnson and C. Jones and Christian Joram and Beat Jost and Mohammed A. Kaballo and Sergii Kandybei and Matthias Karacson and Till Moritz Karbach and Ian Richard Kenyon and Ulrich Kerzel and Tjeerd Ketel and Anna Keune and Basem Khanji and Olga Kochebina and Ilya Komarov and R. F. Koopman and Patrick Koppenburg and M. Korolev and Alexandr Kozlinskiy and Leonid V. Kravchuk and Katharina Kreplin and Michal Kreps and Georg Alexander Krocker and Pavel Krokovny and Florian Kruse and Marcin Kucharczyk and Vasily Kudryavtsev and Tengiz Kvaratskheliya and V. N. La Thi and Daniel Lacarr{\`e}re and G. D. Lafferty and Adriano Lai and D. Lambert and Robert W. Lambert and Elisa Lanciotti and G Lanfranchi and Christina Langenbruch and T. E. Latham and Cristina Lazzeroni and R. Le Gac and J. van Leerdam and J. P. Lees and R{\'e}gis Lef{\`e}vre and Alexander Leflat and J. Lefrancois and Stefano De Leo and O. Leroy and Tadeusz Lesiak and Blake Leverington and Y. Y. Li and L. Li Gioi and M. Liles and Rolf Lindner and Christian Linn and B. Liu and G H Liu and S. Lohn and Iain Longstaff and Jos{\'e} Helder Lopes and E. Lopez Asamar and Neus L{\'o}pez-March and H. Lu and Donatella Lucchesi and Johan Luisier and H. Luo and F. Machefert and Irina Machikhiliyan and Florin C. Maciuc and Oleg Maev and Sneha Sirirshkumar Malde and G. Manca and Giampiero Mancinelli and Umberto Marini Bettolo Marconi and Raphael M{\"a}rki and J{\"o}rg Marks and Giuseppe Martellotti and Aur{\'e}lien Martens and L. M. Garcia Martin and Antonio Manuel Mart{\'i}n S{\'a}nchez and M. Martinelli and D. Mart{\'i}nez Santos and D. Martins Tostes and A. Massafferri and R. Matev and Zolt{\'a}n M{\'a}th{\'e} and Clara Matteuzzi and Emilie Maurice and Alexander Mazurov and J. P. McCarthy and A. McNab and Ronan McNulty and B. T. Meadows and Frank Meier and Marco Meissner and Marcel Hubert Marie Merk and Diego Milan{\'e}s and M. -N. Minard and Jos{\'e} Luis Molina Rodr{\'i}guez and St'ephane Monteil and Dermot Moran and Piotr Morawski and Michael J. Morello and Raymond Mountain and Ivan Mous and Franz Muheim and Katharina M{\"u}ller and Raluca Mureşan and Bogdan Muryn and Britta Muster and Paras P. Naik and T. Nakada and Rajalakshmi Nandakumar and Irina Nasteva and M. D. Needham and Niko Neufeld and Anh Duc Nguyen and T. D. Nguyen and Chung Nguyen-Mau and Mike Nicol and Valentin Niess and Ramon Niet and Nikolay Nikitin and Thomas Nikodem and Andrei Nomerotski and Alexey A. Novoselov and Agnieszka Oblakowska-Mucha and Vladimir A. Obraztsov and Serena Oggero and Stephen Ogilvy and O. Okhrimenko and R. G. C. Oldeman and Monica Orlandea and J. M. Otalora Goicochea and Patrick Haworth Owen and Arantza Oyanguren and Bilas Kanti Pal and A. Palano and Matteo Palutan and Jaap Panman and Antonis Papanestis and Marco Pappagallo and Chris Parkes and Christopher J. Parkinson and Giovanni Passaleva and G. D. Patel and M. Patel and Glen N. Patrick and Claudia Patrignani and C. Pavel-Nicorescu and Antonio Pazos {\'A}lvarez and Antonio Pellegrino and Gianni Penso and M. Pepe Altarelli and Stefano Perazzini and D. L. Perego and Eliseo P{\`e}rez Trigo and A. P{\'e}rez-Calero Yzquierdo and Pascal Perret and Mathieu Perrin-Terrin and G. P. Pessina and Konstantinos Petridis and Alessandro Petrolini and A. Phan and E. Picatoste Olloqui and Boleslaw Pietrzyk and T. Pilař and Davide Pinci and Stephen M. Playfer and M. Pl{\'o} Casas{\'u}s and Francesco Polci and Grzegorz Polok and Anton Poluektov and Erica Polycarpo and Alexander Popov and Dmitry Popov and Bogdan Florin Popovici and C{\'e}dric Potterat and Andrew Powell and Jessica Prisciandaro and Valery M. Pugatch and Albert Puig Navarro and Giovanni Punzi and Wenbin Qian and Jonas Rademacker and Barinjaka Rakotomiaramanana and Murilo Santana Rangel and Iurii Raniuk and Nathalie Rauschmayr and G. Raven and Sophie Redford and M. M. Reid and A. C. dos Reis and Stefania Ricciardi and Alexander Richards and Kurt Rinnert and V. Rives Molina and D. A. Roa Romero and Patricia Robbe and Eduardo Rodrigues and P. Rodriguez Perez and Stefan Roiser and V. I. Romanovsky and A. Romero Vidal and Julien Rouvinet and Thomas Ruf and Fabrizio Ruffini and H. Ruiz and P. Ruiz Valls and Giovanni Sabatino and J. J. Saborido Silva and Naylya Sagidova and Paul D. Sail and Biagio Saitta and V. Salustino Guimaraes and Christophe Salzmann and B. Sanmartin Sedes and Mario Sannino and Roberta Santacesaria and C. Santamarina Rios and Emanuele Santovetti and Matvey Sapunov and Alessio Sarti and Celestina Satriano and Alessia Satta and Mauro Savri{\'e} and Darya Savrina and Paul Nicholas Schaack and M. Schiller and Heinrich Schindler and Maximilian Schlupp and Michael Schmelling and Burkhard Schmidt},
  journal={Physical review letters},
  volume={110 22},
Using pp collision data corresponding to an integrated luminosity of 1.0 fb(-1) and collected by LHCb in 2011 at a center-of-mass energy of 7 TeV, we report the measurement of direct CP violation in B(s)(0)→K(-)π(+) decays, A(CP)(B(s)(0)→K(-)π(+)=0.27±0.04 (stat)±0.01 (syst), with significance exceeding 5 standard deviations. This is the first observation of CP violation in the decays of B(s)(0) mesons. Furthermore, we provide an improved determination of direct CP violation in B(0)→K… 

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