Measurements of charm mixing and violation using decays

<p>Measurements of charm mixing and <em>CP</em> violation parameters from the decay-time-dependent ratio of <em>D<sup>0</sup></em>�<em>K+π-</em> to <em>D<sup>0</sup></em>�<em>K-π+</em> decay rates and the charg...

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Main Authors: Aaij, R, Adeva, B, Adinolfi, M, Ajaltouni, Z, Akar, S, Albrecht, J, Alessio, F, Alexander, M, Ali, S, Alkhazov, G, Cartelle, P, Alves, AA, Amato, S, Amerio, S, Amhis, Y, An, L, Anderlini, L, Andreassi, G, Andreotti, M, Andrews, JE, Appleby, RB, Archilli, F, d’Argent, P, Romeu, J, Artamonov, A, Artuso, M, Aslanides, E, Auriemma, G, Baalouch, M, Babuschkin, I, Bachmann, S, Back, JJ, Badalov, A, Baesso, C, Baker, S, Baldini, W, Barlow, RJ, Barschel, C, Barsuk, S, Barter, W, Baszczyk, M, Batozskaya, V, Batsukh, B, Battista, V, Bay, A, Beaucourt, L, Beddow, J, Bedeschi, F, Bediaga, I, Bel, LJ, Bellee, V, Belloli, N, Belous, K, Belyaev, I, Ben-Haim, E, Bencivenni, G, Benson, S, Benton, J, Berezhnoy, A, Bernet, R, Bertolin, A, Betti, F, Bettler, M-O, van Beuzekom, M, Bezshyiko, I, Bifani, S, Billoir, P, Bird, T, Birnkraut, A, Bitadze, A, Bizzeti, A, Blake, T, Blanc, F, Blouw, J, Blusk, S, Bocci, V, Boettcher, T, Bondar, A, Bondar, N, Bonivento, W, Borgheresi, A, Borghi, S, Borisyak, M, Borsato, M, Bossu, F, Boubdir, M, Bowcock, TJV, Bowen, E, Bozzi, C, Braun, S, Britsch, M, Britton, T, Brodzicka, J, Buchanan, E, Burr, C, Bursche, A, Buytaert, J, Cadeddu, S, Calabrese, R, Calvi, M, Gomez, M, Camboni, A, Campana, P, Perez, D, Perez, DH, Capriotti, L, Carbone, A, Carboni, G, Cardinale, R, Cardini, A, Carniti, P, Carson, L, Akiba, K, Casse, G, Cassina, L, Garcia, L, Cattaneo, M, Cauet, C, Cavallero, G, Cenci, R, Charles, M, Charpentier, P, Chatzikonstantinidis, G, Chefdeville, M, Chen, S, Cheung, S-F, Chobanova, V, Chrzaszcz, M, Vidal, X, Ciezarek, G, Clarke, PEL, Clemencic, M, Cliff, HV, Closier, J, Coco, V, Cogan, J, Cogneras, E, Cogoni, V, Cojocariu, L, Collazuol, G, Collins, P, Comerma-Montells, A, Contu, A, Cook, A, Coombs, G, Coquereau, S, Corti, G, Corvo, M, Sobral, CM, Couturier, B, Cowan, GA, Craik, DC, Crocombe, A, Torres, M, Cunliffe, S, Currie, R, D’Ambrosio, C, Da Cunha Marinho, F, Dall’Occo, E, Dalseno, J, David, PNY, Davis, A, De Aguiar Francisco, O, De Bruyn, K, De Capua, S, De Cian, M, De Miranda, JM, De Paula, L, De Serio, M, De Simone, P, Dean, C-T, Decamp, D, Deckenhoff, M, Del Buono, L, Demmer, M, Derkach, D, Deschamps, O, Dettori, F, Dey, B, Di Canto, A, Dijkstra, H, Dordei, F, Dorigo, M, Suárez, A, Dovbnya, A, Dreimanis, K, Dufour, L, Dujany, G, Dungs, K, Durante, P, Dzhelyadin, R, Dziurda, A, Dzyuba, A, Déléage, N, Easo, S, Ebert, M, Egede, U, Egorychev, V, Eidelman, S, Eisenhardt, S, Eitschberger, U, Ekelhof, R, Eklund, L, Elsasser, C, Ely, S, Esen, S, Evans, HM, Evans, T, Falabella, A, Farley, N, Farry, S, Fay, R, Fazzini, D, Ferguson, D, Albor, V, Prieto, A, Ferrari, F, Rodrigues, F, Ferro-Luzzi, M, Filippov, S, Fini, RA, Fiore, M, Fiorini, M, Firlej, M, Fitzpatrick, C, Fiutowski, T, Fleuret, F, Fohl, K, Fontana, M, Fontanelli, F, Forshaw, DC, Forty, R, Lima, V, Frank, M, Frei, C, Fu, J, Furfaro, E, Färber, C, Torreira, A, Galli, D, Gallorini, S, Gambetta, S, Gandelman, M, Gandini, P, Gao, Y, Martin, LM, Pardiñas, J, Tico, J, Garrido, L, Garsed, PJ, Gascon, D, Gaspar, C, Gavardi, L, Gazzoni, G, Gerick, D, Gersabeck, E, Gersabeck, M, Gershon, T, Ghez, P, Gianì, S, Gibson, V, Girard, OG, Giubega, L, Gizdov, K, Gligorov, VV, Golubkov, D, Golutvin, A, Gomes, A, Gorelov, IV, Gotti, C, Gándara, M, Diaz, R, LA Granado Cardoso, Graugés, E, Graverini, E, Graziani, G, Grecu, A, Griffith, P, Grillo, L, Cazon, BR, Grünberg, O, Gushchin, E, Guz, Y, Gys, T, Göbel, C, Hadavizadeh, T, Hadjivasiliou, C, Haefeli, G, Haen, C, Haines, SC, Hall, S, Hamilton, B, Han, X, Hansmann-Menzemer, S, Harnew, N, Harnew, ST, Harrison, J, Hatch, M, He, J, Head, T, Heister, A, Hennessy, K, Henrard, P, Henry, L, Morata, JA, van Herwijnen, E, Heß, M, Hicheur, A, Hill, D, Hombach, C, Hopchev, H, Hulsbergen, W, Humair, T, Hushchyn, M, Hussain, N, Hutchcroft, D, Idzik, M, Ilten, P, Jacobsson, R, Jaeger, A, Jalocha, J, Jans, E, Jawahery, A, Jiang, F, John, M, Johnson, D, Jones, CR, Joram, C, Jost, B, Jurik, N, Kandybei, S, Kanso, W, Karacson, M, Kariuki, JM, Karodia, S, Kecke, M, Kelsey, M, Kenyon, IR, Kenzie, M, Ketel, T, Khairullin, E, Khanji, B, Khurewathanakul, C, Kirn, T, Klaver, S, Klimaszewski, K, Koliiev, S, Kolpin, M, Komarov, I, Koopman, RF, Koppenburg, P, Kosmyntseva, A, Kozachuk, A, Kozeiha, M, Kravchuk, L, Kreplin, K, Kreps, M, Krokovny, P, Kruse, F, Krzemien, W, Kucewicz, W, Kucharczyk, M, Kudryavtsev, V, Kuonen, AK, Kurek, K, Kvaratskheliya, T, Lacarrere, D, Lafferty, G, Lai, A, Lambert, D, Lanfranchi, G, Langenbruch, C, Latham, T, Lazzeroni, C, Le Gac, R, van Leerdam, J, Lees, J-P, Leflat, A, Lefrançois, J, Lefèvre, R, Lemaitre, F, Cid, E, Leroy, O, Lesiak, T, Leverington, B, Li, Y, Likhomanenko, T, Lindner, R, Linn, C, Lionetto, F, Liu, B, Liu, X, Loh, D, Longstaff, I, Lopes, JH, Lucchesi, D, Martinez, M, Luo, H, Lupato, A, Luppi, E, Lupton, O, Lusiani, A, Lyu, X, Machefert, F, Maciuc, F, Maev, O, Maguire, K, Malde, S, Malinin, A, Maltsev, T, Manca, G, Mancinelli, G, Manning, P, Maratas, J, Marchand, JF, Marconi, U, Benito, C, Marino, P, Marks, J, Martellotti, G, Martin, M, Martinelli, M, Santos, D, Vidal, F, Tostes, D, Massacrier, LM, Massafferri, A, Matev, R, Mathad, A, Mathe, Z, Matteuzzi, C, Mauri, A, Maurin, B, Mazurov, A, McCann, M, McCarthy, J, McNab, A, McNulty, R, Meadows, B, Meier, F, Meissner, M, Melnychuk, D, Merk, M, Merli, A, Michielin, E, Milanes, DA, Minard, M-N, Mitzel, DS, Mogini, A, Rodriguez, J, Monroy, IA, Monteil, S, Morandin, M, Morawski, P, Mordà, A, Morello, MJ, Moron, J, Morris, AB, Mountain, R, Muheim, F, Mulder, M, Mussini, M, Müller, D, Müller, J, Müller, K, Müller, V, Naik, P, Nakada, T, Nandakumar, R, Nandi, A, Nasteva, I, Needham, M, Neri, N, Neubert, S, Neufeld, N, Neuner, M, Nguyen, AD, Nguyen-Mau, C, Nieswand, S, Niet, R, Nikitin, N, Nikodem, T, Novoselov, A, O’Hanlon, DP, Oblakowska-Mucha, A, Obraztsov, V, Ogilvy, S, Oldeman, R, Onderwater, CJG, Goicochea, JM, Otto, A, Owen, P, Oyanguren, A, Pais, PR, Palano, A, Palombo, F, Palutan, M, Panman, J, Papanestis, A, Pappagallo, M, Pappalardo, LL, Parker, W, Parkes, C, Passaleva, G, Pastore, A, Patel, GD, Patel, M, Patrignani, C, Pearce, A, Pellegrino, A, Penso, G, Altarelli, M, Perazzini, S, Perret, P, Pescatore, L, Petridis, K, Petrolini, A, Petrov, A, Petruzzo, M, Olloqui, E, Pietrzyk, B, Pikies, M, Pinci, D, Pistone, A, Piucci, A, Playfer, S, Casasus, M, Poikela, T, Polci, F, Poluektov, A, Polyakov, I, Polycarpo, E, Pomery, GJ, Popov, A, Popov, D, Popovici, B, Poslavskii, S, Potterat, C, Price, E, Price, JD, Prisciandaro, J, Pritchard, A, Prouve, C, Pugatch, V, Navarro, A, Punzi, G, Qian, W, Quagliani, R, Rachwal, B, Rademacker, JH, Rama, M, Pernas, M, Rangel, MS, Raniuk, I, Raven, G, Redi, F, Reichert, S, dos Reis, AC, Alepuz, C, Renaudin, V, Ricciardi, S, Richards, S, Rihl, M, Rinnert, K, Molina, V, Robbe, P, Rodrigues, AB, Rodrigues, E, Lopez, JA, Perez, P, Rogozhnikov, A, Roiser, S, Rollings, A, Romanovskiy, V, Vidal, A, Ronayne, JW, Rotondo, M, Rudolph, MS, Ruf, T, Valls, P, Silva, JJ, Sadykhov, E, Sagidova, N, Saitta, B, Guimaraes, V, Mayordomo, C, Sedes, B, Santacesaria, R, Rios, C, Santimaria, M, Santovetti, E, Sarti, A, Satriano, C, Satta, A, Saunders, DM, Savrina, D, Schael, S, Schellenberg, M, Schiller, M, Schindler, H, Schlupp, M, Schmelling, M, Schmelzer, T, Schmidt, B, Schneider, O, Schopper, A, Schubert, K, Schubiger, M, Schune, M-H, Schwemmer, R, Sciascia, B, Sciubba, A, Semennikov, A, Sergi, A, Serra, N, Serrano, J, Sestini, L, Seyfert, P, Shapkin, M, Shapoval, I, Shcheglov, Y, Shears, T, Shekhtman, L, Shevchenko, V, Shires, A, Siddi, BG, Coutinho, R, de Oliveira, L, Simi, G, Simone, S, Sirendi, M, Skidmore, N, Skwarnicki, T, Smith, E, Smith, IT, Smith, J, Smith, M, Snoek, H, Sokoloff, MD, Soler, FJP, De Paula, B, Spaan, B, Spradlin, P, Sridharan, S, Stagni, F, Stahl, M, Stahl, S, Stefko, P, Stefkova, S, Steinkamp, O, Stemmle, S, Stenyakin, O, Stevenson, S, Stoica, S, Stone, S, Storaci, B, Stracka, S, Straticiuc, M, Straumann, U, Sun, L, Sutcliffe, W, Swientek, K, Syropoulos, V, Szczekowski, M, Szumlak, T, T’Jampens, S, Tayduganov, A, Tekampe, T, Teklishyn, M, Tellarini, G, Teubert, F, Thomas, E, van Tilburg, J, Tilley, MJ, Tisserand, V, Tobin, M, Tolk, S, Tomassetti, L, Tonelli, D, Topp-Joergensen, S, Toriello, F, Tournefier, E, Tourneur, S, Trabelsi, K, Traill, M, Tran, MT, Tresch, M, Trisovic, A, Tsaregorodtsev, A, Tsopelas, P, Tully, A, Tuning, N, Ukleja, A, Ustyuzhanin, A, Uwer, U, Vacca, C, Vagnoni, V, Valassi, A, Valat, S, Valenti, G, Vallier, A, Gomez, R, Regueiro, P, Vecchi, S, van Veghel, M, Velthuis, JJ, Veltri, M, Veneziano, G, Venkateswaran, A, Vernet, M, Vesterinen, M, Viaud, B, Vieira, D, Diaz, M, Vilasis-Cardona, X, Volkov, V, Vollhardt, A, Voneki, B, Vorobyev, A, Vorobyev, V, Voß, C, de Vries, JA, Sierra, C, Waldi, R, Wallace, C, Wallace, R, Walsh, J, Wang, J, Ward, DR, Wark, HM, Watson, NK, Websdale, D, Weiden, A, Whitehead, M, Wicht, J, Wilkinson, G, Wilkinson, M, Williams, M, Williams, MP, Williams, T, Wilson, FF, Wimberley, J, Wishahi, J, Wislicki, W, Witek, M, Wormser, G, Wotton, SA, Wraight, K, Wright, S, Wyllie, K, Xie, Y, Xing, Z, Xu, Z, Yang, Z, Yin, H, Yu, J, Yuan, X, Yushchenko, O, Zarebski, KA, Zavertyaev, M, Zhang, L, Zhang, Y, Zhelezov, A, Zheng, Y, Zhokhov, A, Zhu, X, Zhukov, V, Zucchelli, S
Format: Journal article
Published: American Physical Society 2017
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Summary:<p>Measurements of charm mixing and <em>CP</em> violation parameters from the decay-time-dependent ratio of <em>D<sup>0</sup></em>�<em>K+π-</em> to <em>D<sup>0</sup></em>�<em>K-π+</em> decay rates and the charge-conjugate ratio are reported. The analysis uses <em>&amp;Bmacr;</em>�<em>D<sup>*</sup></em>+<em>μ</em>-<em>X</em>, and charge-conjugate decays, where <em>D<sup>*</sup></em>+�<em>D<sup>0</sup>π</em>+, and <em>D<sup>0</sup></em>�<em>K</em>∓<em>π</em>±. The <em>pp</em> collision data are recorded by the LHCb experiment at center-of-mass energies √<sub>s</sub>=7 and 8 TeV, corresponding to an integrated luminosity of 3 fb<sup>-1</sup>. The data are analyzed under three hypotheses: (i) mixing assuming <em>CP</em> symmetry, (ii) mixing assuming no direct <em>CP</em> violation in the Cabibbo-favored or doubly Cabibbo-suppressed decay amplitudes, and (iii) mixing allowing either direct <em>CP</em> violation and/or <em>CP</em> violation in the superpositions of flavor eigenstates defining the mass eigenstates. The data are also combined with those from a previous LHCb study of <em>D</em><sup>0</sup>�<em>Kπ</em> decays from a disjoint set of <em>D<sup>*</sup></em>+ candidates produced directly in pp collisions. In all cases, the data are consistent with the hypothesis of <em>CP</em> symmetry.</p>