Evidence for direct CP violation in the measurement of the Cabbibo-Kobayashi-Maskawa angle γ with B∓ → D(*)K(*)∓ decays

P del Amo Sanchez; J P Lees; V Poireau; E Prencipe; V Tisserand; J Garra Tico; E Grauges; M Martinelli; A Palano; M Pappagallo; G Eigen; B Stugu; L Sun; M Battaglia; D N Brown; B Hooberman; L T Kerth; Yu G Kolomensky; G Lynch; I L Osipenkov; T Tanabe; C M Hawkes; A T Watson; H Koch; T Schroeder; D J Asgeirsson; C Hearty; T S Mattison; J A McKenna; A Khan; A Randle-Conde; V E Blinov; A R Buzykaev; V P Druzhinin; V B Golubev; A P Onuchin; S I Serednyakov; Yu I Skovpen; E P Solodov; K Yu Todyshev; A N Yushkov; M Bondioli; S Curry; D Kirkby; A J Lankford; M Mandelkern; E C Martin; D P Stoker; H Atmacan; J W Gary; F Liu; O Long; G M Vitug; C Campagnari; T M Hong; D Kovalskyi; J D Richman; A M Eisner; C A Heusch; J Kroseberg; W S Lockman; A J Martinez; T Schalk; B A Schumm; A Seiden; L O Winstrom; C H Cheng; D A Doll; B Echenard; D G Hitlin; P Ongmongkolkul; F C Porter; A Y Rakitin; R Andreassen; M S Dubrovin; G Mancinelli; B T Meadows; M D Sokoloff; P C Bloom; W T Ford; A Gaz; J F Hirschauer; M Nagel; U Nauenberg; J G Smith; S R Wagner; R Ayad; W H Toki; T M Karbach; J Merkel; A Petzold; B Spaan; K Wacker; M J Kobel; K R Schubert; R Schwierz; D Bernard; M Verderi; P J Clark; S Playfer; J E Watson; M Andreotti; D Bettoni; C Bozzi; R Calabrese; A Cecchi; G Cibinetto; E Fioravanti; P Franchini; E Luppi; M Munerato; M Negrini; A Petrella; L Piemontese; R Baldini-Ferroli; A Calcaterra; R de Sangro; G Finocchiaro; M Nicolaci; S Pacetti; P Patteri; I M Peruzzi; M Piccolo; M Rama; A Zallo; R Contri; E Guido; M Lo Vetere; M R Monge; S Passaggio; C Patrignani; E Robutti; S Tosi; B Bhuyan; M Morii; A Adametz; J Marks; S Schenk; U Uwer; F U Bernlochner; H M Lacker; T Lueck; A Volk; P D Dauncey; M Tibbetts; P K Behera; U Mallik; C Chen; J Cochran; H B Crawley; L Dong; W T Meyer; S Prell; E I Rosenberg; A E Rubin; Y Y Gao; A V Gritsan; Z J Guo; N Arnaud; M Davier; D Derkach; J Firmino da Costa; G Grosdidier; F Le Diberder; A M Lutz; B Malaescu; A Perez; P Roudeau; M H Schune; J Serrano; V Sordini; A Stocchi; L Wang; G Wormser; D J Lange; D M Wright; I Bingham; J P Burke; C A Chavez; J P Coleman; J R Fry; E Gabathuler; R Gamet; D E Hutchcroft; D J Payne; C Touramanis; A J Bevan; F Di Lodovico; R Sacco; M Sigamani; G Cowan; S Paramesvaran; A C Wren; D N Brown; C L Davis; A G Denig; M Fritsch; W Gradl; A Hafner; K E Alwyn; D Bailey; R J Barlow; G Jackson; G D Lafferty; T J West; J Anderson; R Cenci; A Jawahery; D A Roberts; G Simi; J M Tuggle; C Dallapiccola; E Salvati; R Cowan; D Dujmic; P H Fisher; G Sciolla; M Zhao; D Lindemann; P M Patel; S H Robertson; M Schram; P Biassoni; A Lazzaro; V Lombardo; F Palombo; S Stracka; L Cremaldi; R Godang; R Kroeger; P Sonnek; D J Summers; H W Zhao; X Nguyen; M Simard; P Taras; G De Nardo; D Monorchio; G Onorato; C Sciacca; G Raven; H L Snoek; C P Jessop; K J Knoepfel; J M LoSecco; W F Wang; L A Corwin; K Honscheid; R Kass; J P Morris; A M Rahimi; N L Blount; J Brau; R Frey; O Igonkina; J A Kolb; R Rahmat; N B Sinev; D Strom; J Strube; E Torrence; G Castelli; E Feltresi; N Gagliardi; M Margoni; M Morandin; M Posocco; M Rotondo; F Simonetto; R Stroili; E Ben-Haim; G R Bonneaud; H Briand; G Calderini; J Chauveau; O Hamon; Ph Leruste; G Marchiori; J Ocariz; J Prendki; S Sitt; M Biasini; E Manoni; C Angelini; G Batignani; S Bettarini; M Carpinelli; G Casarosa; A Cervelli; F Forti; M A Giorgi; A Lusiani; N Neri; E Paoloni; G Rizzo; J J Walsh; D Lopes Pegna; C Lu; J Olsen; A J S Smith; A V Telnov; F Anulli; E Baracchini; G Cavoto; R Faccini; F Ferrarotto; F Ferroni; M Gaspero; L Li Gioi; M A Mazzoni; G Piredda; F Renga; M Ebert; T Hartmann; T Leddig; H Schröder; R Waldi; T Adye; B Franek; E O Olaiya; F F Wilson; S Emery; G Hamel de Monchenault; G Vasseur; Ch Yèche; M Zito; I J R Aitchison; M T Allen; D Aston; D J Bard; R Bartoldus; J F Benitez; C Cartaro; M R Convery; J Dorfan; G P Dubois-Felsmann; W Dunwoodie; R C Field; M Franco Sevilla; B G Fulsom; A M Gabareen; M T Graham; P Grenier; C Hast; W R Innes; M H Kelsey; H Kim; P Kim; M L Kocian; D W G S Leith; S Li; B Lindquist; S Luitz; V Luth; H L Lynch; D B MacFarlane; H Marsiske; D R Muller; H Neal; S Nelson; C P O'Grady; I Ofte; M Perl; T Pulliam; B N Ratcliff; A Roodman; A A Salnikov; V Santoro; R H Schindler; J Schwiening; A Snyder; D Su; M K Sullivan; S Sun; K Suzuki; J M Thompson; J Va'vra; A P Wagner; M Weaver; C A West; W J Wisniewski; M Wittgen; D H Wright; H W Wulsin; A K Yarritu; C C Young; V Ziegler; X R Chen; W Park; M V Purohit; R M White; J R Wilson; S J Sekula; M Bellis; P R Burchat; A J Edwards; T S Miyashita; S Ahmed; M S Alam; J A Ernst; B Pan; M A Saeed; S B Zain; N Guttman; A Soffer; P Lund; S M Spanier; R Eckmann; J L Ritchie; A M Ruland; C J Schilling; R F Schwitters; B C Wray; J M Izen; X C Lou; F Bianchi; D Gamba; M Pelliccioni; M Bomben; L Lanceri; L Vitale; N Lopez-March; F Martinez-Vidal; D A Milanes; A Oyanguren; J Albert; Sw Banerjee; H H F Choi; K Hamano; G J King; R Kowalewski; M J Lewczuk; I M Nugent; J M Roney; R J Sobie; T J Gershon; P F Harrison; J Ilic; T E Latham; E M T Puccio; H R Band; X Chen; S Dasu; K T Flood; Y Pan; R Prepost; C O Vuosalo; S L Wu; BABAR Collaboration

doi:10.1103/PhysRevLett.105.121801

Evidence for direct CP violation in the measurement of the Cabbibo-Kobayashi-Maskawa angle γ with B∓ → D()K()∓ decays

Phys Rev Lett. 2010 Sep 17;105(12):121801. doi: 10.1103/PhysRevLett.105.121801. Epub 2010 Sep 16.

Authors

P del Amo Sanchez¹, J P Lees, V Poireau, E Prencipe, V Tisserand, J Garra Tico, E Grauges, M Martinelli, A Palano, M Pappagallo, G Eigen, B Stugu, L Sun, M Battaglia, D N Brown, B Hooberman, L T Kerth, Yu G Kolomensky, G Lynch, I L Osipenkov, T Tanabe, C M Hawkes, A T Watson, H Koch, T Schroeder, D J Asgeirsson, C Hearty, T S Mattison, J A McKenna, A Khan, A Randle-Conde, V E Blinov, A R Buzykaev, V P Druzhinin, V B Golubev, A P Onuchin, S I Serednyakov, Yu I Skovpen, E P Solodov, K Yu Todyshev, A N Yushkov, M Bondioli, S Curry, D Kirkby, A J Lankford, M Mandelkern, E C Martin, D P Stoker, H Atmacan, J W Gary, F Liu, O Long, G M Vitug, C Campagnari, T M Hong, D Kovalskyi, J D Richman, A M Eisner, C A Heusch, J Kroseberg, W S Lockman, A J Martinez, T Schalk, B A Schumm, A Seiden, L O Winstrom, C H Cheng, D A Doll, B Echenard, D G Hitlin, P Ongmongkolkul, F C Porter, A Y Rakitin, R Andreassen, M S Dubrovin, G Mancinelli, B T Meadows, M D Sokoloff, P C Bloom, W T Ford, A Gaz, J F Hirschauer, M Nagel, U Nauenberg, J G Smith, S R Wagner, R Ayad, W H Toki, T M Karbach, J Merkel, A Petzold, B Spaan, K Wacker, M J Kobel, K R Schubert, R Schwierz, D Bernard, M Verderi, P J Clark, S Playfer, J E Watson, M Andreotti, D Bettoni, C Bozzi, R Calabrese, A Cecchi, G Cibinetto, E Fioravanti, P Franchini, E Luppi, M Munerato, M Negrini, A Petrella, L Piemontese, R Baldini-Ferroli, A Calcaterra, R de Sangro, G Finocchiaro, M Nicolaci, S Pacetti, P Patteri, I M Peruzzi, M Piccolo, M Rama, A Zallo, R Contri, E Guido, M Lo Vetere, M R Monge, S Passaggio, C Patrignani, E Robutti, S Tosi, B Bhuyan, M Morii, A Adametz, J Marks, S Schenk, U Uwer, F U Bernlochner, H M Lacker, T Lueck, A Volk, P D Dauncey, M Tibbetts, P K Behera, U Mallik, C Chen, J Cochran, H B Crawley, L Dong, W T Meyer, S Prell, E I Rosenberg, A E Rubin, Y Y Gao, A V Gritsan, Z J Guo, N Arnaud, M Davier, D Derkach, J Firmino da Costa, G Grosdidier, F Le Diberder, A M Lutz, B Malaescu, A Perez, P Roudeau, M H Schune, J Serrano, V Sordini, A Stocchi, L Wang, G Wormser, D J Lange, D M Wright, I Bingham, J P Burke, C A Chavez, J P Coleman, J R Fry, E Gabathuler, R Gamet, D E Hutchcroft, D J Payne, C Touramanis, A J Bevan, F Di Lodovico, R Sacco, M Sigamani, G Cowan, S Paramesvaran, A C Wren, D N Brown, C L Davis, A G Denig, M Fritsch, W Gradl, A Hafner, K E Alwyn, D Bailey, R J Barlow, G Jackson, G D Lafferty, T J West, J Anderson, R Cenci, A Jawahery, D A Roberts, G Simi, J M Tuggle, C Dallapiccola, E Salvati, R Cowan, D Dujmic, P H Fisher, G Sciolla, M Zhao, D Lindemann, P M Patel, S H Robertson, M Schram, P Biassoni, A Lazzaro, V Lombardo, F Palombo, S Stracka, L Cremaldi, R Godang, R Kroeger, P Sonnek, D J Summers, H W Zhao, X Nguyen, M Simard, P Taras, G De Nardo, D Monorchio, G Onorato, C Sciacca, G Raven, H L Snoek, C P Jessop, K J Knoepfel, J M LoSecco, W F Wang, L A Corwin, K Honscheid, R Kass, J P Morris, A M Rahimi, N L Blount, J Brau, R Frey, O Igonkina, J A Kolb, R Rahmat, N B Sinev, D Strom, J Strube, E Torrence, G Castelli, E Feltresi, N Gagliardi, M Margoni, M Morandin, M Posocco, M Rotondo, F Simonetto, R Stroili, E Ben-Haim, G R Bonneaud, H Briand, G Calderini, J Chauveau, O Hamon, Ph Leruste, G Marchiori, J Ocariz, J Prendki, S Sitt, M Biasini, E Manoni, C Angelini, G Batignani, S Bettarini, M Carpinelli, G Casarosa, A Cervelli, F Forti, M A Giorgi, A Lusiani, N Neri, E Paoloni, G Rizzo, J J Walsh, D Lopes Pegna, C Lu, J Olsen, A J S Smith, A V Telnov, F Anulli, E Baracchini, G Cavoto, R Faccini, F Ferrarotto, F Ferroni, M Gaspero, L Li Gioi, M A Mazzoni, G Piredda, F Renga, M Ebert, T Hartmann, T Leddig, H Schröder, R Waldi, T Adye, B Franek, E O Olaiya, F F Wilson, S Emery, G Hamel de Monchenault, G Vasseur, Ch Yèche, M Zito, I J R Aitchison, M T Allen, D Aston, D J Bard, R Bartoldus, J F Benitez, C Cartaro, M R Convery, J Dorfan, G P Dubois-Felsmann, W Dunwoodie, R C Field, M Franco Sevilla, B G Fulsom, A M Gabareen, M T Graham, P Grenier, C Hast, W R Innes, M H Kelsey, H Kim, P Kim, M L Kocian, D W G S Leith, S Li, B Lindquist, S Luitz, V Luth, H L Lynch, D B MacFarlane, H Marsiske, D R Muller, H Neal, S Nelson, C P O'Grady, I Ofte, M Perl, T Pulliam, B N Ratcliff, A Roodman, A A Salnikov, V Santoro, R H Schindler, J Schwiening, A Snyder, D Su, M K Sullivan, S Sun, K Suzuki, J M Thompson, J Va'vra, A P Wagner, M Weaver, C A West, W J Wisniewski, M Wittgen, D H Wright, H W Wulsin, A K Yarritu, C C Young, V Ziegler, X R Chen, W Park, M V Purohit, R M White, J R Wilson, S J Sekula, M Bellis, P R Burchat, A J Edwards, T S Miyashita, S Ahmed, M S Alam, J A Ernst, B Pan, M A Saeed, S B Zain, N Guttman, A Soffer, P Lund, S M Spanier, R Eckmann, J L Ritchie, A M Ruland, C J Schilling, R F Schwitters, B C Wray, J M Izen, X C Lou, F Bianchi, D Gamba, M Pelliccioni, M Bomben, L Lanceri, L Vitale, N Lopez-March, F Martinez-Vidal, D A Milanes, A Oyanguren, J Albert, Sw Banerjee, H H F Choi, K Hamano, G J King, R Kowalewski, M J Lewczuk, I M Nugent, J M Roney, R J Sobie, T J Gershon, P F Harrison, J Ilic, T E Latham, E M T Puccio, H R Band, X Chen, S Dasu, K T Flood, Y Pan, R Prepost, C O Vuosalo, S L Wu; BABAR Collaboration

Affiliation

¹ Laboratoire d'Annecy-le-Vieux de Physique des Particules (LAPP), Université de Savoie, CNRS/IN2P3, F-74941 Annecy-Le-Vieux, France.

PMID: 20867628
DOI: 10.1103/PhysRevLett.105.121801

Abstract

We report the measurement of the Cabibbo-Kobayashi-Maskawa CP-violating angle γ through a Dalitz plot analysis of neutral D-meson decays to K(S)(0) π+ π- and K(S)(0) K+ K- produced in the processes B∓ → DK∓, B∓ D* K∓ with D* → Dπ(0), Dγ, and B∓ → DK*∓ with K*∓ → K(S)(0) π∓, using 468 million BB pairs collected by the BABAR detector at the PEP-II asymmetric-energy e+ e- collider at SLAC. We measure γ = (68 ± 14 ± 4 ± 3)° (modulo 180°), where the first error is statistical, the second is the experimental systematic uncertainty, and the third reflects the uncertainty in the description of the neutral D decay amplitudes. This result is inconsistent with γ = 0 (no direct CP violation) with a significance of 3.5 standard deviations.