Evidence for CP violation in time-integrated D0→h(-)h(+) decay rates

R Aaij; C Abellan Beteta; B Adeva; M Adinolfi; C Adrover; A Affolder; Z Ajaltouni; J Albrecht; F Alessio; M Alexander; G Alkhazov; P Alvarez Cartelle; A A Alves Jr; S Amato; Y Amhis; J Anderson; R B Appleby; O Aquines Gutierrez; F Archilli; L Arrabito; A Artamonov; M Artuso; E Aslanides; G Auriemma; S Bachmann; J J Back; D S Bailey; V Balagura; W Baldini; R J Barlow; C Barschel; S Barsuk; W Barter; A Bates; C Bauer; Th Bauer; A Bay; I Bediaga; S Belogurov; K Belous; I Belyaev; E Ben-Haim; M Benayoun; G Bencivenni; S Benson; J Benton; R Bernet; M-O Bettler; M van Beuzekom; A Bien; S Bifani; T Bird; A Bizzeti; P M Bjørnstad; T Blake; F Blanc; C Blanks; J Blouw; S Blusk; A Bobrov; V Bocci; A Bondar; N Bondar; W Bonivento; S Borghi; A Borgia; T J V Bowcock; C Bozzi; T Brambach; J van den Brand; J Bressieux; D Brett; M Britsch; T Britton; N H Brook; H Brown; A Büchler-Germann; I Burducea; A Bursche; J Buytaert; S Cadeddu; O Callot; M Calvi; M Calvo Gomez; A Camboni; P Campana; A Carbone; G Carboni; 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M Fontana; F Fontanelli; R Forty; M Frank; C Frei; M Frosini; S Furcas; A Gallas Torreira; D Galli; M Gandelman; P Gandini; Y Gao; J-C Garnier; J Garofoli; J Garra Tico; L Garrido; D Gascon; C Gaspar; N Gauvin; M Gersabeck; T Gershon; Ph Ghez; V Gibson; V V Gligorov; C Göbel; D Golubkov; A Golutvin; A Gomes; H Gordon; M Grabalosa Gándara; R Graciani Diaz; L A Granado Cardoso; E Graugés; G Graziani; A Grecu; E Greening; S Gregson; B Gui; E Gushchin; Yu Guz; T Gys; G Haefeli; C Haen; S C Haines; T Hampson; S Hansmann-Menzemer; R Harji; N Harnew; J Harrison; P F Harrison; T Hartmann; J He; V Heijne; K Hennessy; P Henrard; J A Hernando Morata; E van Herwijnen; E Hicks; K Holubyev; P Hopchev; W Hulsbergen; P Hunt; T Huse; R S Huston; D Hutchcroft; D Hynds; V Iakovenko; P Ilten; J Imong; R Jacobsson; A Jaeger; M Jahjah Hussein; E Jans; F Jansen; P Jaton; B Jean-Marie; F Jing; M John; D Johnson; C R Jones; B Jost; M Kaballo; S Kandybei; M Karacson; T M Karbach; J Keaveney; I R Kenyon; U Kerzel; 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doi:10.1103/PhysRevLett.108.111602

Evidence for CP violation in time-integrated D0→h(-)h(+) decay rates

Phys Rev Lett. 2012 Mar 16;108(11):111602. doi: 10.1103/PhysRevLett.108.111602. Epub 2012 Mar 12.

Authors

R Aaij¹, C Abellan Beteta, B Adeva, M Adinolfi, C Adrover, A Affolder, Z Ajaltouni, J Albrecht, F Alessio, M Alexander, G Alkhazov, P Alvarez Cartelle, A A Alves Jr, S Amato, Y Amhis, J Anderson, R B Appleby, O Aquines Gutierrez, F Archilli, L Arrabito, A Artamonov, M Artuso, E Aslanides, G Auriemma, S Bachmann, J J Back, D S Bailey, V Balagura, W Baldini, R J Barlow, C Barschel, S Barsuk, W Barter, A Bates, C Bauer, Th Bauer, A Bay, I Bediaga, S Belogurov, K Belous, I Belyaev, E Ben-Haim, M Benayoun, G Bencivenni, S Benson, J Benton, R Bernet, M-O Bettler, M van Beuzekom, A Bien, S Bifani, T Bird, A Bizzeti, P M Bjørnstad, T Blake, F Blanc, C Blanks, J Blouw, S Blusk, A Bobrov, V Bocci, A Bondar, N Bondar, W Bonivento, S Borghi, A Borgia, T J V Bowcock, C Bozzi, T Brambach, J van den Brand, J Bressieux, D Brett, M Britsch, T Britton, N H Brook, H Brown, A Büchler-Germann, I Burducea, A Bursche, J Buytaert, S Cadeddu, O Callot, M Calvi, M Calvo Gomez, A Camboni, P Campana, A Carbone, G Carboni, R Cardinale, A Cardini, L Carson, K Carvalho Akiba, G Casse, M Cattaneo, Ch Cauet, M Charles, Ph Charpentier, N Chiapolini, K Ciba, X Cid Vidal, G Ciezarek, P E L Clarke, M Clemencic, H V Cliff, J Closier, C Coca, V Coco, J Cogan, P Collins, A Comerma-Montells, F Constantin, A Contu, A Cook, M Coombes, G Corti, G A Cowan, R Currie, C D'Ambrosio, P David, P N Y David, I De Bonis, S De Capua, M De Cian, F De Lorenzi, J M De Miranda, L De Paula, P De Simone, D Decamp, M Deckenhoff, H Degaudenzi, L Del Buono, C Deplano, D Derkach, O Deschamps, F Dettori, J Dickens, H Dijkstra, P Diniz Batista, F Domingo Bonal, S Donleavy, F Dordei, A Dosil Suárez, D Dossett, A Dovbnya, F Dupertuis, R Dzhelyadin, A Dziurda, S Easo, U Egede, V Egorychev, S Eidelman, D van Eijk, F Eisele, S Eisenhardt, R Ekelhof, L Eklund, Ch Elsasser, D Elsby, D Esperante Pereira, L Estève, A Falabella, E Fanchini, C Färber, G Fardell, C Farinelli, S Farry, V Fave, V Fernandez Albor, M Ferro-Luzzi, S Filippov, C Fitzpatrick, M Fontana, F Fontanelli, R Forty, M Frank, C Frei, M Frosini, S Furcas, A Gallas Torreira, D Galli, M Gandelman, P Gandini, Y Gao, J-C Garnier, J Garofoli, J Garra Tico, L Garrido, D Gascon, C Gaspar, N Gauvin, M Gersabeck, T Gershon, Ph Ghez, V Gibson, V V Gligorov, C Göbel, D Golubkov, A Golutvin, A Gomes, H Gordon, M Grabalosa Gándara, R Graciani Diaz, L A Granado Cardoso, E Graugés, G Graziani, A Grecu, E Greening, S Gregson, B Gui, E Gushchin, Yu Guz, T Gys, G Haefeli, C Haen, S C Haines, T Hampson, S Hansmann-Menzemer, R Harji, N Harnew, J Harrison, P F Harrison, T Hartmann, J He, V Heijne, K Hennessy, P Henrard, J A Hernando Morata, E van Herwijnen, E Hicks, K Holubyev, P Hopchev, W Hulsbergen, P Hunt, T Huse, R S Huston, D Hutchcroft, D Hynds, V Iakovenko, P Ilten, J Imong, R Jacobsson, A Jaeger, M Jahjah Hussein, E Jans, F Jansen, P Jaton, B Jean-Marie, F Jing, M John, D Johnson, C R Jones, B Jost, M Kaballo, S Kandybei, M Karacson, T M Karbach, J Keaveney, I R Kenyon, U Kerzel, T Ketel, A Keune, B Khanji, Y M Kim, M Knecht, R Koopman, P Koppenburg, A Kozlinskiy, L Kravchuk, K Kreplin, M Kreps, G Krocker, P Krokovny, F Kruse, K Kruzelecki, M Kucharczyk, T Kvaratskheliya, V N La Thi, D Lacarrere, G Lafferty, A Lai, D Lambert, R W Lambert, E Lanciotti, G Lanfranchi, C Langenbruch, T Latham, C Lazzeroni, R Le Gac, J van Leerdam, J-P Lees, R Lefèvre, A Leflat, J Lefrançois, O Leroy, T Lesiak, L Li, L Li Gioi, M Lieng, M Liles, R Lindner, C Linn, B Liu, G Liu, J von Loeben, J H Lopes, E Lopez Asamar, N Lopez-March, H Lu, J Luisier, A Mac Raighne, F Machefert, I V Machikhiliyan, F Maciuc, O Maev, J Magnin, S Malde, R M D Mamunur, G Manca, G Mancinelli, N Mangiafave, U Marconi, R Märki, J Marks, G Martellotti, A Martens, L Martin, A Martín Sánchez, D Martinez Santos, A Massafferri, Z Mathe, C Matteuzzi, M Matveev, E Maurice, B Maynard, A Mazurov, G McGregor, R McNulty, M Meissner, M Merk, J Merkel, R Messi, S Miglioranzi, D A Milanes, M-N Minard, J Molina Rodriguez, S Monteil, D Moran, P Morawski, R Mountain, I Mous, F Muheim, K Müller, R Muresan, B Muryn, B Muster, M Musy, J Mylroie-Smith, P Naik, T Nakada, R Nandakumar, I Nasteva, M Nedos, M Needham, N Neufeld, C Nguyen-Mau, M Nicol, V Niess, N Nikitin, A Nomerotski, A Novoselov, A Oblakowska-Mucha, V Obraztsov, S Oggero, S Ogilvy, O Okhrimenko, R Oldeman, M Orlandea, J M Otalora Goicochea, P Owen, K Pal, J Palacios, A Palano, M Palutan, J Panman, A Papanestis, M Pappagallo, C Parkes, C J Parkinson, G Passaleva, G D Patel, M Patel, S K Paterson, G N Patrick, C Patrignani, C Pavel-Nicorescu, A Pazos Alvarez, A Pellegrino, G Penso, M Pepe Altarelli, S Perazzini, D L Perego, E Perez Trigo, A Pérez-Calero Yzquierdo, P Perret, M Perrin-Terrin, G Pessina, A Petrella, A Petrolini, A Phan, E Picatoste Olloqui, B Pie Valls, B Pietrzyk, T Pilař, D Pinci, R Plackett, S Playfer, M Plo Casasus, G Polok, A Poluektov, E Polycarpo, D Popov, B Popovici, C Potterat, A Powell, J Prisciandaro, V Pugatch, A Puig Navarro, W Qian, J H Rademacker, B Rakotomiaramanana, M S Rangel, I Raniuk, G Raven, S Redford, M M Reid, A C dos Reis, S Ricciardi, K Rinnert, D A Roa Romero, P Robbe, E Rodrigues, F Rodrigues, P Rodriguez Perez, G J Rogers, S Roiser, V Romanovsky, M Rosello, J Rouvinet, T Ruf, H Ruiz, G Sabatino, J J Saborido Silva, N Sagidova, P Sail, B Saitta, C Salzmann, M Sannino, R Santacesaria, C Santamarina Rios, R Santinelli, E Santovetti, M Sapunov, A Sarti, C Satriano, A Satta, M Savrie, D Savrina, P Schaack, M Schiller, S Schleich, M Schlupp, M Schmelling, B Schmidt, O Schneider, A Schopper, M-H Schune, R Schwemmer, B Sciascia, A Sciubba, M Seco, A Semennikov, K Senderowska, I Sepp, N Serra, J Serrano, P Seyfert, M Shapkin, I Shapoval, P Shatalov, Y Shcheglov, T Shears, L Shekhtman, O Shevchenko, V Shevchenko, A Shires, R Silva Coutinho, T Skwarnicki, A C Smith, N A Smith, E Smith, K Sobczak, F J P Soler, A Solomin, F Soomro, B Souza De Paula, B Spaan, A Sparkes, P Spradlin, F Stagni, S Stahl, O Steinkamp, S Stoica, S Stone, B Storaci, M Straticiuc, U Straumann, V K Subbiah, S Swientek, M Szczekowski, P Szczypka, T Szumlak, S T'jampens, E Teodorescu, F Teubert, C Thomas, E Thomas, J van Tilburg, V Tisserand, M Tobin, S Topp-Joergensen, N Torr, E Tournefier, M T Tran, A Tsaregorodtsev, N Tuning, M Ubeda Garcia, A Ukleja, P Urquijo, U Uwer, V Vagnoni, G Valenti, R Vazquez Gomez, P Vazquez Regueiro, S Vecchi, J J Velthuis, M Veltri, B Viaud, I Videau, X Vilasis-Cardona, J Visniakov, A Vollhardt, D Volyanskyy, D Voong, A Vorobyev, H Voss, S Wandernoth, J Wang, D R Ward, N K Watson, A D Webber, D Websdale, M Whitehead, D Wiedner, L Wiggers, G Wilkinson, M P Williams, M Williams, F F Wilson, J Wishahi, M Witek, W Witzeling, S A Wotton, K Wyllie, Y Xie, F Xing, Z Xing, Z Yang, R Young, O Yushchenko, M Zavertyaev, F Zhang, L Zhang, W C Zhang, Y Zhang, A Zhelezov, L Zhong, E Zverev, A Zvyagin; LHCb Collaboration

Affiliation

¹ Nikhef National Institute for Subatomic Physics, Amsterdam, The Netherlands.

PMID: 22540460
DOI: 10.1103/PhysRevLett.108.111602

Abstract

A search for time-integrated CP violation in D(0)→h(-)h(+) (h=K, π) decays is presented using 0.62 fb(-1) of data collected by LHCb in 2011. The flavor of the charm meson is determined by the charge of the slow pion in the D(*+)→D(0)π(+) and D(*-)→D[over ¯](0)π(-) decay chains. The difference in CP asymmetry between D(0)→K(-)K(+) and D(0)→π(-)π(+), ΔA(CP)≡A(CP)(K(-)K(+))-A(CP)(π(-)π(+)), is measured to be [-0.82±0.21(stat)±0.11(syst)]%. This differs from the hypothesis of CP conservation by 3.5 standard deviations.