doi: 10.1103/PhysRevLett.86.2515.
Measurement of CP-violating asymmetries in B0 decays to CP eigenstates
B Aubert
1
, D Boutigny, I De Bonis, J M Gaillard, A Jeremie, Y Karyotakis, J P Lees, P Robbe, V Tisserand, A Palano, G P Chen, J C Chen, N D Qi, G Rong, P Wang, Y S Zhu, G Eigen, P L Reinertsen, B Stugu, B Abbott, G S Abrams, A W Borgland, A B Breon, D N Brown, J Button-Shafer, R N Cahn, A R Clark, S Dardin, C Day, S F Dow, T Elioff, Q Fan, I Gaponenko, M S Gill, F R Goozen, S J Gowdy, A Gritsan, Y Groysman, R G Jacobsen, R C Jared, R W Kadel, J Kadyk, A Karcher, L T Kerth, I Kipnis, S Kluth, Y G Kolomensky, J F Kral, R Lafever, C LeClerc, M E Levi, S A Lewis, C Lionberger, T Liu, M Long, G Lynch, M Marino, K Marks, A B Meyer, A Mokhtarani, M Momayezi, M Nyman, P J Oddone, J Ohnemus, D Oshatz, S Patton, A Perazzo, C Peters, W Pope, M Pripstein, D R Quarrie, J E Rasson, N A Roe, A Romosan, M T Ronan, V G Shelkov, R Stone, A V Telnov, H von der Lippe, T Weber, W A Wenzel, M S Zisman, P G Bright-Thomas, T J Harrison, C M Hawkes, A Kirk, D J Knowles, S W O'Neale, A T Watson, N K Watson, T Deppermann, H Koch, J Krug, M Kunze, B Lewandowski, K Peters, H Schmuecker, M Steinke, J C Andress, N R Barlow, W Bhimji, N Chevalier, P J Clark, W N Cottingham, N De Groot, N Dyce, B Foster, A Mass, J D McFall, D Wallom, F F Wilson, K Abe, C Hearty, T S Mattison, J A McKenna, D Thiessen, B Camanzi, S Jolly, A K McKemey, J Tinslay, V E Blinov, A D Bukin, D A Bukin, A R Buzykaev, M S Dubrovin, V B Golubev, V N Ivanchenko, G M Kolachev, A A Korol, E A Kravchenko, A P Onuchin, A A Salnikov, S I Serednyakov, Y I Skovpen, V I Telnov, A N Yushkov, A J Lankford, M Mandelkern, S McMahon, D P Stoker, A Ahsan, C Buchanan, S Chun, D B MacFarlane, S Prell, S Rahatlou, G Raven, V Sharma, S Burke, C Campagnari, B Dahmes, D Hale, P A Hart, N Kuznetsova, S Kyre, S L Levy, O Long, A Lu, J D Richman, W Verkerke, M Witherell, S Yellin, J Beringer, D E Dorfan, A M Eisner, A Frey, A A Grillo, M Grothe, C A Heusch, R P Johnson, W Kroeger, W S Lockman, T Pulliam, H Sadrozinski, T Schalk, R E Schmitz, B A Schumm, A Seiden, E N Spencer, M Turri, W Walkowiak, D C Williams, E Chen, G P Dubois-Felsmann, A Dvoretskii, J E Hanson, D G Hitlin, S Metzler, J Oyang, F C Porter, A Ryd, A Samuel, M Weaver, S Yang, R Y Zhu, S Devmal, T L Geld, S Jayatilleke, S M Jayatilleke, G Mancinelli, B T Meadows, M D Sokoloff, P Bloom, S Fahey, W T Ford, F Gaede, W C van Hoek, D R Johnson, A K Michael, U Nauenberg, A Olivas, H Park, P Rankin, J Roy, S Sen, J G Smith, D L Wagner, J Blouw, J L Harton, M Krishnamurthy, A Soffer, W H Toki, D W Warner, R J Wilson, J Zhang, T Brandt, J Brose, T Colberg, G Dahlinger, M Dickopp, R S Dubitzky, P Eckstein, H Futterschneider, R Krause, E Maly, R Müller-Pfefferkorn, S Otto, K R Schubert, R Schwierz, B Spaan, L Wilden, L Behr, D Bernard, G R Bonneaud, F Brochard, J Cohen-Tanugi, S Ferrag, G Fouque, F Gastaldi, P Matricon, P Mora de Freitas, C Renard, E Roussot, S T'Jampens, C Thiebaux, G Vasileiadis, M Verderi, A Anjomshoaa, R Bernet, F Di Lodovico, A Khan, F Muheim, S Playfer, J E Swain, M Falbo, C Bozzi, S Dittongo, M Folegani, L Piemontese, E Treadwell, F Anulli, R Baldini-Ferroli, A Calcaterra, R de Sangro, D Falciai, G Finocchiaro, P Patteri, I M Peruzzi, M Piccolo, Y Xie, A Zallo, S Bagnasco, A Buzzo, R Contri, G Crosetti, M Lo Vetere, M Macri, M R Monge, M Pallavicini, S Passaggio, F C Pastore, C Patrignani, M G Pia, E Robutti, A Santroni, M Morii, R Bartoldus, T Dignan, R Hamilton, U Mallik, J Cochran, H B Crawley, P A Fischer, J Lamsa, R McKay, W T Meyer, E I Rosenberg, J N Albert, C Beigbeder, M Benkebil, D Breton, R Cizeron, S Du, G Grosdidier, C Hast, A Höcker, V LePeltier, A M Lutz, S Plaszczynski, M H Schune, S Trincaz-Duvoid, K Truong, A Valassi, G Wormser, R M Bionta, V Brigljević, A Brooks, O Fackler, D Fujino, D J Lange, M Mugge, T G O'Connor, B Pedrotti, X Shi, K van Bibber, T J Wenaus, D M Wright, C R Wuest, B Yamamoto, M Carroll, J R Fry, E Gabathuler, R Gamet, M George, M Kay, D J Payne, R J Sloane, C Touramanis, M L Aspinwall, D A Bowerman, P D Dauncey, U Egede, I Eschrich, N J Gunawardane, R Martin, J A Nash, D R Price, P Sanders, D Smith, D E Azzopardi, J J Back, P Dixon, P F Harrison, D Newman-Coburn, R J Potter, H W Shorthouse, P Strother, P B Vidal, M I Williams, G Cowan, S George, M G Green, A Kurup, C E Marker, P McGrath, T R McMahon, F Salvatore, I Scott, G Vaitsas, D Brown, C L Davis, K Ford, Y Li, J Pavlovich, J Allison, R J Barlow, J T Boyd, J Fullwood, F Jackson, G D Lafferty, N Savvas, E T Simopoulos, R J Thompson, J H Weatherall, R Bard, A Farbin, A Jawahery, V Lillard, J Olsen, D A Roberts, J R Schieck, G Blaylock, C Dallapiccola, K T Flood, S S Hertzbach, R Kofler, C S Lin, H Staengle, S Willocq, J Wittlin, B Brau, R Cowan, G Sciolla, F Taylor, R K Yamamoto, D I Britton, M Milek, P M Patel, J Trischuk, F Lanni, F Palombo, J M Bauer, M Booke, L Cremaldi, V Eschenberg, R Kroeger, M Reep, J Reidy, D A Sanders, D J Summers, M Beaulieu, J P Martin, J Y Nief, R Seitz, P Taras, V Zacek, H Nicholson, C S Sutton, N Cavallo, C Cartaro, G De Nardo, F Fabozzi, C Gatto, L Lista, P Paolucci, D Piccolo, C Sciacca, J M LoSecco, J R Alsmiller, T A Gabriel, T Handler, J Heck, J E Brau, R Frey, M Iwasaki, N B Sinev, D Strom, E Borsato, F Colecchia, F Dal Corso, F Galeazzi, M Margoni, M Marzolla, G Michelon, M Morandin, M Posocco, M Rotondo, F Simonetto, R Stroili, E Torassa, C Voci, P Bailly, M Benayoun, H Briand, J Chauveau, P David, C De La Vaissière, L Del Buono, J F Genat, O Hamon, F Le Diberder, H Lebbolo, P Leruste, J Lory, L Martin, L Roos, J Stark, S Versillé, B Zhang, P F Manfredi, L Ratti, V Re, V Speziali, E D Frank, L Gladney, Q H Guo, J H Panetta, C Angelini, G Batignani, S Bettarini, M Bondioli, F Bosi, M Carpinelli, F Forti, M A Giorgi, A Lusiani, F Martinez-Vidal, M Morganti, N Neri, E Paoloni, M Rama, G Rizzo, F Sandrelli, G Simi, G Triggiani, J Walsh, M Hairre, D Judd, K Paick, L Turnbull, D E Wagoner, J Albert, C Bula, R Fernholz, C Lu, K T McDonald, V Miftakov, B Sands, S F Schaffner, A J Smith, A Tumanov, E W Varnes, F Bronzini, A Buccheri, C Bulfon, G Cavoto, D del Re, R Faccini, F Ferrarotto, F Ferroni, K Fratini, E Lamanna, E Leonardi, M A Mazzoni, S Morganti, G Piredda, F Safai Tehrani, M Serra, C Voena, R Waldi, P F Jacques, M Kalelkar, R J Plano, T Adye, B Claxton, B Franek, S Galagedera, N I Geddes, G P Gopal, J Lidbury, S M Xella, R Aleksan, P Besson, P Bourgeois, G De Domenico, S Emery, A Gaidot, S F Ganzhur, L Gosset, G Hamel de Monchenault, W Kozanecki, M Langer, G W London, B Mayer, B Serfass, G Vasseur, C Yeche, M Zito, N Copty, M V Purohit, H Singh, F X Yumiceva, I Adam, P L Anthony, D Aston, K Baird, J Bartelt, J Becla, R Bell, E Bloom, C T Boeheim, A M Boyarski, R F Boyce, F Bulos, W Burgess, B Byers, G Calderini, R Claus, M R Convery, R Coombes, L Cottrell, D P Coupal, D H Coward, W W Craddock, H DeStaebler, J Dorfan, M Doser, W Dunwoodie, S Ecklund, T H Fieguth, R C Field, D R Freytag, T Glanzman, G L Godfrey, P Grosso, G Haller, A Hanushevsky, J Harris, A Hasan, J L Hewett, T Himel, M E Huffer, W R Innes, C P Jessop, H Kawahara, L Keller, M H Kelsey, P Kim, L A Klaisner, M L Kocian, H J Krebs, P F Kunz, U Langenegger, W Langeveld, D W Leith, S K Louie, S Luitz, V Luth, H L Lynch, J MacDonald, G Manzin, H Mariske, M McCulloch, D McShurley, S Menke, R Messner, S Metcalfe, K C Moffeit, R Mount, D R Muller, D Nelson, M Nordby, C P O'Grady, F G O'Neill, G Oxoby, T Pavel, J Perl, S Petrak, G Putallaz, H Quinn, P E Raines, B N Ratcliff, R Reif, S H Robertson, L S Rochester, A Roodman, J J Russell, L Sapozhnikov, O H Saxton, T Schietinger, R H Schindler, J Schwiening, J T Seeman, V V Serbo, K Skarpass Sr, A Snyder, A Soha, S M Spanier, A Stahl, J Stelzer, D Su, M K Sullivan, M Talby, H A Tanaka, J Va'vra, S R Wagner, A J Weinstein, J L White, U Wienands, W J Wisniewski, C C Young, G Zioulas, P R Burchat, C H Cheng, D Kirkby, T I Meyer, C Roat, A De Silva, R Henderson, S Berridge, W Bugg, H Cohn, E Hart, A W Weidemann, T Benninger, J M Izen, I Kitayama, X C Lou, M Turcotte, F Bianchi, M Bona, B Di Girolamo, D Gamba, A Smol, D Zanin, L Bosisio, G Della Ricca, L Lanceri, A Pompili, P Poropat, G Vuagnin, R S Panvini, C M Brown, R Kowalewski, J M Roney, H R Band, E Charles, S Dasu, P Elmer, H Hu, J R Johnson, J Nielsen, W Orejudos, Y Pan, R Prepost, I J Scott, J H von Wimmersperg-Toeller, S L Wu, Z Yu, H Zobernig, T M Kordich, T B Moore, H Neal; BABAR Collaboration
Affiliations
Affiliation
- 1 Laboratoire de Physique des Particules, Annecy-le-Vieux, France.
- PMID: 11289970
- DOI: 10.1103/PhysRevLett.86.2515
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Measurement of CP-violating asymmetries in B0 decays to CP eigenstates
B Aubert et al.
Phys Rev Lett.
.
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doi: 10.1103/PhysRevLett.86.2515.
Authors
B Aubert
1
, D Boutigny, I De Bonis, J M Gaillard, A Jeremie, Y Karyotakis, J P Lees, P Robbe, V Tisserand, A Palano, G P Chen, J C Chen, N D Qi, G Rong, P Wang, Y S Zhu, G Eigen, P L Reinertsen, B Stugu, B Abbott, G S Abrams, A W Borgland, A B Breon, D N Brown, J Button-Shafer, R N Cahn, A R Clark, S Dardin, C Day, S F Dow, T Elioff, Q Fan, I Gaponenko, M S Gill, F R Goozen, S J Gowdy, A Gritsan, Y Groysman, R G Jacobsen, R C Jared, R W Kadel, J Kadyk, A Karcher, L T Kerth, I Kipnis, S Kluth, Y G Kolomensky, J F Kral, R Lafever, C LeClerc, M E Levi, S A Lewis, C Lionberger, T Liu, M Long, G Lynch, M Marino, K Marks, A B Meyer, A Mokhtarani, M Momayezi, M Nyman, P J Oddone, J Ohnemus, D Oshatz, S Patton, A Perazzo, C Peters, W Pope, M Pripstein, D R Quarrie, J E Rasson, N A Roe, A Romosan, M T Ronan, V G Shelkov, R Stone, A V Telnov, H von der Lippe, T Weber, W A Wenzel, M S Zisman, P G Bright-Thomas, T J Harrison, C M Hawkes, A Kirk, D J Knowles, S W O'Neale, A T Watson, N K Watson, T Deppermann, H Koch, J Krug, M Kunze, B Lewandowski, K Peters, H Schmuecker, M Steinke, J C Andress, N R Barlow, W Bhimji, N Chevalier, P J Clark, W N Cottingham, N De Groot, N Dyce, B Foster, A Mass, J D McFall, D Wallom, F F Wilson, K Abe, C Hearty, T S Mattison, J A McKenna, D Thiessen, B Camanzi, S Jolly, A K McKemey, J Tinslay, V E Blinov, A D Bukin, D A Bukin, A R Buzykaev, M S Dubrovin, V B Golubev, V N Ivanchenko, G M Kolachev, A A Korol, E A Kravchenko, A P Onuchin, A A Salnikov, S I Serednyakov, Y I Skovpen, V I Telnov, A N Yushkov, A J Lankford, M Mandelkern, S McMahon, D P Stoker, A Ahsan, C Buchanan, S Chun, D B MacFarlane, S Prell, S Rahatlou, G Raven, V Sharma, S Burke, C Campagnari, B Dahmes, D Hale, P A Hart, N Kuznetsova, S Kyre, S L Levy, O Long, A Lu, J D Richman, W Verkerke, M Witherell, S Yellin, J Beringer, D E Dorfan, A M Eisner, A Frey, A A Grillo, M Grothe, C A Heusch, R P Johnson, W Kroeger, W S Lockman, T Pulliam, H Sadrozinski, T Schalk, R E Schmitz, B A Schumm, A Seiden, E N Spencer, M Turri, W Walkowiak, D C Williams, E Chen, G P Dubois-Felsmann, A Dvoretskii, J E Hanson, D G Hitlin, S Metzler, J Oyang, F C Porter, A Ryd, A Samuel, M Weaver, S Yang, R Y Zhu, S Devmal, T L Geld, S Jayatilleke, S M Jayatilleke, G Mancinelli, B T Meadows, M D Sokoloff, P Bloom, S Fahey, W T Ford, F Gaede, W C van Hoek, D R Johnson, A K Michael, U Nauenberg, A Olivas, H Park, P Rankin, J Roy, S Sen, J G Smith, D L Wagner, J Blouw, J L Harton, M Krishnamurthy, A Soffer, W H Toki, D W Warner, R J Wilson, J Zhang, T Brandt, J Brose, T Colberg, G Dahlinger, M Dickopp, R S Dubitzky, P Eckstein, H Futterschneider, R Krause, E Maly, R Müller-Pfefferkorn, S Otto, K R Schubert, R Schwierz, B Spaan, L Wilden, L Behr, D Bernard, G R Bonneaud, F Brochard, J Cohen-Tanugi, S Ferrag, G Fouque, F Gastaldi, P Matricon, P Mora de Freitas, C Renard, E Roussot, S T'Jampens, C Thiebaux, G Vasileiadis, M Verderi, A Anjomshoaa, R Bernet, F Di Lodovico, A Khan, F Muheim, S Playfer, J E Swain, M Falbo, C Bozzi, S Dittongo, M Folegani, L Piemontese, E Treadwell, F Anulli, R Baldini-Ferroli, A Calcaterra, R de Sangro, D Falciai, G Finocchiaro, P Patteri, I M Peruzzi, M Piccolo, Y Xie, A Zallo, S Bagnasco, A Buzzo, R Contri, G Crosetti, M Lo Vetere, M Macri, M R Monge, M Pallavicini, S Passaggio, F C Pastore, C Patrignani, M G Pia, E Robutti, A Santroni, M Morii, R Bartoldus, T Dignan, R Hamilton, U Mallik, J Cochran, H B Crawley, P A Fischer, J Lamsa, R McKay, W T Meyer, E I Rosenberg, J N Albert, C Beigbeder, M Benkebil, D Breton, R Cizeron, S Du, G Grosdidier, C Hast, A Höcker, V LePeltier, A M Lutz, S Plaszczynski, M H Schune, S Trincaz-Duvoid, K Truong, A Valassi, G Wormser, R M Bionta, V Brigljević, A Brooks, O Fackler, D Fujino, D J Lange, M Mugge, T G O'Connor, B Pedrotti, X Shi, K van Bibber, T J Wenaus, D M Wright, C R Wuest, B Yamamoto, M Carroll, J R Fry, E Gabathuler, R Gamet, M George, M Kay, D J Payne, R J Sloane, C Touramanis, M L Aspinwall, D A Bowerman, P D Dauncey, U Egede, I Eschrich, N J Gunawardane, R Martin, J A Nash, D R Price, P Sanders, D Smith, D E Azzopardi, J J Back, P Dixon, P F Harrison, D Newman-Coburn, R J Potter, H W Shorthouse, P Strother, P B Vidal, M I Williams, G Cowan, S George, M G Green, A Kurup, C E Marker, P McGrath, T R McMahon, F Salvatore, I Scott, G Vaitsas, D Brown, C L Davis, K Ford, Y Li, J Pavlovich, J Allison, R J Barlow, J T Boyd, J Fullwood, F Jackson, G D Lafferty, N Savvas, E T Simopoulos, R J Thompson, J H Weatherall, R Bard, A Farbin, A Jawahery, V Lillard, J Olsen, D A Roberts, J R Schieck, G Blaylock, C Dallapiccola, K T Flood, S S Hertzbach, R Kofler, C S Lin, H Staengle, S Willocq, J Wittlin, B Brau, R Cowan, G Sciolla, F Taylor, R K Yamamoto, D I Britton, M Milek, P M Patel, J Trischuk, F Lanni, F Palombo, J M Bauer, M Booke, L Cremaldi, V Eschenberg, R Kroeger, M Reep, J Reidy, D A Sanders, D J Summers, M Beaulieu, J P Martin, J Y Nief, R Seitz, P Taras, V Zacek, H Nicholson, C S Sutton, N Cavallo, C Cartaro, G De Nardo, F Fabozzi, C Gatto, L Lista, P Paolucci, D Piccolo, C Sciacca, J M LoSecco, J R Alsmiller, T A Gabriel, T Handler, J Heck, J E Brau, R Frey, M Iwasaki, N B Sinev, D Strom, E Borsato, F Colecchia, F Dal Corso, F Galeazzi, M Margoni, M Marzolla, G Michelon, M Morandin, M Posocco, M Rotondo, F Simonetto, R Stroili, E Torassa, C Voci, P Bailly, M Benayoun, H Briand, J Chauveau, P David, C De La Vaissière, L Del Buono, J F Genat, O Hamon, F Le Diberder, H Lebbolo, P Leruste, J Lory, L Martin, L Roos, J Stark, S Versillé, B Zhang, P F Manfredi, L Ratti, V Re, V Speziali, E D Frank, L Gladney, Q H Guo, J H Panetta, C Angelini, G Batignani, S Bettarini, M Bondioli, F Bosi, M Carpinelli, F Forti, M A Giorgi, A Lusiani, F Martinez-Vidal, M Morganti, N Neri, E Paoloni, M Rama, G Rizzo, F Sandrelli, G Simi, G Triggiani, J Walsh, M Hairre, D Judd, K Paick, L Turnbull, D E Wagoner, J Albert, C Bula, R Fernholz, C Lu, K T McDonald, V Miftakov, B Sands, S F Schaffner, A J Smith, A Tumanov, E W Varnes, F Bronzini, A Buccheri, C Bulfon, G Cavoto, D del Re, R Faccini, F Ferrarotto, F Ferroni, K Fratini, E Lamanna, E Leonardi, M A Mazzoni, S Morganti, G Piredda, F Safai Tehrani, M Serra, C Voena, R Waldi, P F Jacques, M Kalelkar, R J Plano, T Adye, B Claxton, B Franek, S Galagedera, N I Geddes, G P Gopal, J Lidbury, S M Xella, R Aleksan, P Besson, P Bourgeois, G De Domenico, S Emery, A Gaidot, S F Ganzhur, L Gosset, G Hamel de Monchenault, W Kozanecki, M Langer, G W London, B Mayer, B Serfass, G Vasseur, C Yeche, M Zito, N Copty, M V Purohit, H Singh, F X Yumiceva, I Adam, P L Anthony, D Aston, K Baird, J Bartelt, J Becla, R Bell, E Bloom, C T Boeheim, A M Boyarski, R F Boyce, F Bulos, W Burgess, B Byers, G Calderini, R Claus, M R Convery, R Coombes, L Cottrell, D P Coupal, D H Coward, W W Craddock, H DeStaebler, J Dorfan, M Doser, W Dunwoodie, S Ecklund, T H Fieguth, R C Field, D R Freytag, T Glanzman, G L Godfrey, P Grosso, G Haller, A Hanushevsky, J Harris, A Hasan, J L Hewett, T Himel, M E Huffer, W R Innes, C P Jessop, H Kawahara, L Keller, M H Kelsey, P Kim, L A Klaisner, M L Kocian, H J Krebs, P F Kunz, U Langenegger, W Langeveld, D W Leith, S K Louie, S Luitz, V Luth, H L Lynch, J MacDonald, G Manzin, H Mariske, M McCulloch, D McShurley, S Menke, R Messner, S Metcalfe, K C Moffeit, R Mount, D R Muller, D Nelson, M Nordby, C P O'Grady, F G O'Neill, G Oxoby, T Pavel, J Perl, S Petrak, G Putallaz, H Quinn, P E Raines, B N Ratcliff, R Reif, S H Robertson, L S Rochester, A Roodman, J J Russell, L Sapozhnikov, O H Saxton, T Schietinger, R H Schindler, J Schwiening, J T Seeman, V V Serbo, K Skarpass Sr, A Snyder, A Soha, S M Spanier, A Stahl, J Stelzer, D Su, M K Sullivan, M Talby, H A Tanaka, J Va'vra, S R Wagner, A J Weinstein, J L White, U Wienands, W J Wisniewski, C C Young, G Zioulas, P R Burchat, C H Cheng, D Kirkby, T I Meyer, C Roat, A De Silva, R Henderson, S Berridge, W Bugg, H Cohn, E Hart, A W Weidemann, T Benninger, J M Izen, I Kitayama, X C Lou, M Turcotte, F Bianchi, M Bona, B Di Girolamo, D Gamba, A Smol, D Zanin, L Bosisio, G Della Ricca, L Lanceri, A Pompili, P Poropat, G Vuagnin, R S Panvini, C M Brown, R Kowalewski, J M Roney, H R Band, E Charles, S Dasu, P Elmer, H Hu, J R Johnson, J Nielsen, W Orejudos, Y Pan, R Prepost, I J Scott, J H von Wimmersperg-Toeller, S L Wu, Z Yu, H Zobernig, T M Kordich, T B Moore, H Neal; BABAR Collaboration
Affiliation
- 1 Laboratoire de Physique des Particules, Annecy-le-Vieux, France.
- PMID: 11289970
- DOI: 10.1103/PhysRevLett.86.2515
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Abstract
We present measurements of time-dependent CP-violating asymmetries in neutral B decays to several CP eigenstates. The measurement uses a data sample of 23x10(6) Upsilon(4S)-->BbarB decays collected by the BABAR detector at the PEP-II asymmetric B Factory at SLAC. In this sample, we find events in which one neutral B meson is fully reconstructed in a CP eigenstate containing charmonium and the flavor of the other neutral B meson is determined from its decay products. The amplitude of the CP-violating asymmetry, which in the standard model is proportional to sin2beta, is derived from the decay time distributions in such events. The result is sin2beta = 0.34+/-0.20 (stat)+/-0.05 (syst).
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