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Observation of $D^0 - \overline{D}^0$ oscillations

We report a measurement of the time-dependent ratio of $D^0 \to K^+\pi^-$ to $D^0 \to K^-\pi^+$ decay rates in $D^{*+}$-tagged events using 1.0 fb$^{-1}$ of integrated luminosity recorded by the LHCb experiment. We measure the mixing parameters $x'^2=(-0.9 \pm 1.3)$x$10^{-4}, y'=(7.2 \pm 2...

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Detalles Bibliográficos
Autores principales: Aaij, R, Abellan Beteta, C, Adametz, A, Adeva, B, Adinolfi, M, Adrover, C, Affolder, A, Ajaltouni, Z, Albrecht, J, Alessio, F, Alexander, M, Ali, S, Alkhazov, G, Alvarez Cartelle, P, Alves Jr, A A, Amato, S, Amhis, Y, Anderlini, L, Anderson, J, Andreassen, R, Appleby, R B, Aquines Gutierrez, O, Archilli, F, Artamonov, A, Artuso, M, Aslanides, E, Auriemma, G, Bachmann, S, Back, J J, Baesso, C, Baldini, W, Barlow, R J, Barschel, C, Barsuk, S, Barter, W, Bates, A, Bauer, Th, Bay, A, Beddow, J, Bediaga, I, Belogurov, S, Belous, K, Belyaev, I, Ben-Haim, E, Benayoun, M, Bencivenni, G, Benson, S, Benton, J, Berezhnoy, A, Bernet, R, Bettler, M -O, van Beuzekom, M, Bien, A, Bifani, S, Bird, T, Bizzeti, A, Bjørnstad, P M, Blake, T, Blanc, F, Blanks, C, Blouw, J, Blusk, S, Bobrov, A, Bocci, V, Bondar, A, Bondar, N, Bonivento, W, Borghi, S, Borgia, A, Bowcock, T J V, Bowen, E, Bozzi, C, Brambach, T, van den Brand, J, Bressieux, J, Brett, D, Britsch, M, Britton, T, Brook, N H, Brown, H, Büchler-Germann, A, Burducea, I, Bursche, A, Buytaert, J, Cadeddu, S, Callot, O, Calvi, M, Calvo Gomez, M, Camboni, A, Campana, P, Carbone, A, Carboni, G, Cardinale, R, Cardini, A, Carranza-Mejia, H, Carson, L, Carvalho Akiba, K, Casse, G, Cattaneo, M, Cauet, Ch, Charles, M, Charpentier, Ph, Chen, P, Chiapolini, N, Chrzaszcz, M, Ciba, K, Cid Vidal, X, Ciezarek, G, Clarke, P E L, Clemencic, M, Cliff, H V, Closier, J, Coca, C, Coco, V, Cogan, J, Cogneras, E, Collins, P, Comerma-Montells, A, Contu, A, Cook, A, Coombes, M, Corti, G, Couturier, B, Cowan, G A, Craik, D, Cunliffe, S, Currie, R, D'Ambrosio, C, David, P, David, P N Y, De Bonis, I, De Bruyn, K, De Capua, S, De Cian, M, De Miranda, J M, De Paula, L, De Simone, P, Decamp, D, Deckenhoff, M, Degaudenzi, H, Del Buono, L, Deplano, C, Derkach, D, Deschamps, O, Dettori, F, Di Canto, A, Dickens, J, Dijkstra, H, Diniz Batista, P, Dogaru, M, Domingo Bonal, F, Donleavy, S, Dordei, F, Dosil Suárez, A, Dossett, D, Dovbnya, A, Dupertuis, F, Dzhelyadin, R, Dziurda, A, Dzyuba, A, Easo, S, Egede, U, Egorychev, V, Eidelman, S, van Eijk, D, Eisenhardt, S, Ekelhof, R, Eklund, L, El Rifai, I, Elsasser, Ch, Elsby, D, Falabella, A, Färber, C, Fardell, G, Farinelli, C, Farry, S, Fave, V, Fernandez Albor, V, Ferreira Rodrigues, F, Ferro-Luzzi, M, Filippov, S, Fitzpatrick, C, Fontana, M, Fontanelli, F, Forty, R, Francisco, O, Frank, M, Frei, C, Frosini, M, Furcas, S, Gallas Torreira, A, Galli, D, Gandelman, M, Gandini, P, Gao, Y, Garofoli, J, Garosi, P, Garra Tico, J, Garrido, L, Gaspar, C, Gauld, R, Gersabeck, E, Gersabeck, M, Gershon, T, Ghez, Ph, Gibson, V, Gligorov, V V, Göbel, C, Golubkov, D, Golutvin, A, Gomes, A, Gordon, H, Grabalosa Gándara, M, Graciani Diaz, R, Granado Cardoso, L A, Graugés, E, Graziani, G, Grecu, A, Greening, E, Gregson, S, Grünberg, O, Gui, B, Gushchin, E, Guz, Yu, Gys, T, Hadjivasiliou, C, Haefeli, G, Haen, C, Haines, S C, Hall, S, Hampson, T, Hansmann-Menzemer, S, Harnew, N, Harnew, S T, Harrison, J, Harrison, P F, Hartmann, T, He, J, Heijne, V, Hennessy, K, Henrard, P, Hernando Morata, J A, van Herwijnen, E, Hicks, E, Hill, D, Hoballah, M, Hombach, C, Hopchev, P, Hulsbergen, W, Hunt, P, Huse, T, Hussain, N, Hutchcroft, D, Hynds, D, Iakovenko, V, Ilten, P, Imong, J, Jacobsson, R, Jaeger, A, Jans, E, Jansen, F, Jaton, P, Jing, F, John, M, Johnson, D, Jones, C R, Jost, B, Kaballo, M, Kandybei, S, Karacson, M, Karbach, T M, Kenyon, I R, Kerzel, U, Ketel, T, Keune, A, Khanji, B, Kochebina, O, Komarov, V, Koopman, R F, Koppenburg, P, Korolev, M, Kozlinskiy, A, Kravchuk, L, Kreplin, K, Kreps, M, Krocker, G, Krokovny, P, Kruse, F, Kucharczyk, M, Kudryavtsev, V, Kvaratskheliya, T, La Thi, V N, Lacarrere, D, Lafferty, G, Lai, A, Lambert, D, Lambert, R W, Lanciotti, E, Lanfranchi, G, Langenbruch, C, Latham, T, Lazzeroni, C, Le Gac, R, van Leerdam, J, Lees, J -P, Lefèvre, R, Leflat, A, Lefrançois, J, Leroy, O, Lesiak, T, Li, Y, Li Gioi, L, Liles, M, Lindner, R, Linn, C, Liu, B, Liu, G, von Loeben, J, Lopes, J H, Lopez Asamar, E, Lopez-March, N, Lu, H, Luisier, J, Luo, H, Mac Raighne, A, Machefert, F, Machikhiliyan, I V, Maciuc, F, Maev, O, Maino, M, Malde, S, Manca, G, Mancinelli, G, Mangiafave, N, Marconi, U, Märki, R, Marks, J, Martellotti, G, Martens, A, Martin, L, Martín Sánchez, A, Martinelli, M, Martinez Santos, D, Martins Tostes, D, Massafferri, A, Matev, R, Mathe, Z, Matteuzzi, C, Matveev, M, Maurice, E, Mazurov, A, McCarthy, J, McNulty, R, Meadows, B, Meissner, M, Merk, M, Milanes, D A, Minard, M -N, Molina Rodriguez, J, Monteil, S, Moran, D, Morawski, P, Mountain, R, Mous, I, Muheim, F, Müller, K, Muresan, R, Muryn, B, Muster, B, Naik, P, Nakada, T, Nandakumar, R, Nasteva, I, Needham, M, Neufeld, N, Nguyen, A D, Nguyen, T D, Nguyen-Mau, C, Nicol, M, Niess, V, Nikitin, N, Nikodem, T, Nisar, S, Nomerotski, A, Novoselov, A, Oblakowska-Mucha, A, Obraztsov, V, Oggero, S, Ogilvy, S, Okhrimenko, O, Oldeman, R, Orlandea, M, Otalora Goicochea, J M, Owen, P, Pal, B K, Palano, A, Palutan, M, Panman, J, Papanestis, A, Pappagallo, M, Parkes, C, Parkinson, C J, Passaleva, G, Patel, G D, Patel, M, Patrick, G N, Patrignani, C, Pavel-Nicorescu, C, Pazos Alvarez, A, Pellegrino, A, Penso, G, Pepe Altarelli, M, Perazzini, S, Perego, D L, Perez Trigo, E, Pérez-Calero Yzquierdo, A, Perret, P, Perrin-Terrin, M, Pessina, G, Petridis, K, Petrolini, A, Phan, A, Picatoste Olloqui, E, Pietrzyk, B, Pilař, T, Pinci, D, Playfer, S, Plo Casasus, M, Polci, F, Polok, G, Poluektov, A, Polycarpo, E, Popov, D, Popovici, B, Potterat, C, Powell, A, Prisciandaro, J, Pugatch, V, Puig Navarro, A, Qian, W, Rademacker, J H, Rakotomiaramanana, B, Rangel, M S, Raniuk, I, Rauschmayr, N, Raven, G, Redford, S, Reid, M M, dos Reis, A C, Ricciardi, S, Richards, A, Rinnert, K, Rives Molina, V, Roa Romero, D A, Robbe, P, Rodrigues, E, Rodriguez Perez, P, Rogers, G J, Roiser, S, Romanovsky, V, Romero Vidal, A, Rouvinet, J, Ruf, T, Ruiz, H, Sabatino, G, Saborido Silva, J J, Sagidova, N, Sail, P, Saitta, B, Salzmann, C, Sanmartin Sedes, B, Sannino, M, Santacesaria, R, Santamarina Rios, C, Santovetti, E, Sapunov, M, Sarti, A, Satriano, C, Satta, A, Savrie, M, Schaack, P, Schiller, M, Schindler, H, Schleich, S, Schlupp, M, Schmelling, M, Schmidt, B, Schneider, O, Schopper, A, Schune, M -H, Schwemmer, R, Sciascia, B, Sciubba, A, Seco, M, Semennikov, A, Senderowska, K, Sepp, I, Serra, N, Serrano, J, Seyfert, P, Shapkin, M, Shapoval, I, Shatalov, P, Shcheglov, Y, Shears, T, Shekhtman, L, Shevchenko, O, Shevchenko, V, Shires, A, Silva Coutinho, R, Skwarnicki, T, Smith, N A, Smith, E, Smith, M, Sobczak, K, Sokoloff, M D, Soler, F J P, Soomro, F, Souza, D, Souza De Paula, B, Spaan, B, Sparkes, A, Spradlin, P, Stagni, F, Stahl, S, Steinkamp, O, Stoica, S, Stone, S, Storaci, B, Straticiuc, M, Straumann, U, Subbiah, V K, Swientek, S, Szczekowski, M, Szczypka, P, Szumlak, T, T'Jampens, S, Teklishyn, M, Teodorescu, E, Teubert, F, Thomas, C, Thomas, E, van Tilburg, J, Tisserand, V, Tobin, M, Tolk, S, Tonelli, D, Topp-Joergensen, S, Torr, N, Tournefier, E, Tourneur, S, Tran, M T, Tresch, M, Tsaregorodtsev, A, Tsopelas, P, Tuning, N, Ubeda Garcia, M, Ukleja, A, Urner, D, Uwer, U, Vagnoni, V, Valenti, G, Vazquez Gomez, R, Vazquez Regueiro, P, Vecchi, S, Velthuis, J J, Veltri, M, Veneziano, G, Vesterinen, M, Viaud, B, Vieira, D, Vilasis-Cardona, X, Vollhardt, A, Volyanskyy, D, Voong, D, Vorobyev, A, Vorobyev, V, Voß, C, Voss, H, Waldi, R, Wallace, R, Wandernoth, S, Wang, J, Ward, D R, Watson, N K, Webber, A D, Websdale, D, Whitehead, M, Wicht, J, Wiedner, D, Wiggers, L, Wilkinson, G, Williams, M P, Williams, M, Wilson, F F, Wishahi, J, Witek, M, Witzeling, W, Wotton, S A, Wright, S, Wu, S, Wyllie, K, Xie, Y, Xing, F, Xing, Z, Yang, Z, Young, R, Yuan, X, Yushchenko, O, Zangoli, M, Zavertyaev, M, Zhang, F, Zhang, L, Zhang, W C, Zhang, Y, Zhelezov, A, Zhong, L, Zvyagin, A
Lenguaje:eng
Publicado: 2012
Materias:
Acceso en línea:https://dx.doi.org/10.1103/PhysRevLett.110.101802
http://cds.cern.ch/record/1490649
Descripción
Sumario:We report a measurement of the time-dependent ratio of $D^0 \to K^+\pi^-$ to $D^0 \to K^-\pi^+$ decay rates in $D^{*+}$-tagged events using 1.0 fb$^{-1}$ of integrated luminosity recorded by the LHCb experiment. We measure the mixing parameters $x'^2=(-0.9 \pm 1.3)$x$10^{-4}, y'=(7.2 \pm 2.4)$x$10^{-3}$ and the ratio of doubly-Cabibbo-suppressed to Cabibbo-favored decay rates $R_D=(3.52 \pm 0.15)$x$10^{-3}$, where the uncertainties include statistical and systematic sources. The result excludes the no-mixing hypothesis with a probability corresponding to 9.1 standard deviations and represents the first observation of $D^0-\bar{D}^0$ oscillations from a single measurement.