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Improved Measurement of B^+ → ρ^+ ρ^0 and Determination of the Quark-Mixing Phase Angle α

Aubert, B. and Karyotakis, Y. and Lees, J. P. and Poireau, V. and Prencipe, E. and Prudent, X. and Tisserand, V. and Garra-Tico, J. and Grauges, E. and Lopez, L. and Palano, A. and Pappagallo, M. and Eigen, G. and Stugu, B. and Sun, L. and Battaglia, M. and Brown, D. N. and Kerth, L. T. and Kolomensky, Yu. G. and Lynch, G. and Osipenkov, I. L. and Tackmann, K. and Tanabe, T. and Hawkes, C. M. and Soni, N. and Watson, A. T. and Koch, H. and Schroeder, T. and Asgeirsson, D. J. and Fulsom, B. G. and Hearty, C. and Mattison, T. S. and McKenna, J. A. and Barrett, M. and Khan, A. and Randle-Conde, A. and Blinov, V. E. and Bukin, A. D. and Buzykaev, A. R. and Druzhinin, V. P. and Golubev, V. B. and Onuchin, A. P. and Serednyakov, S. I. and Skovpen, Yu. I. and Solodov, E. P. and Todyshev, K. Yu. and Bondioli, M. and Curry, S. and Eschrich, I. and Kirkby, D. and Lankford, A. J. and Lund, P. and Mandelkern, M. and Martin, E. C. and Stoker, D. P. and Abachi, S. and Buchanan, C. and Atmacan, H. and Gary, J. W. and Liu, F. and Long, O. and Vitug, G. M. and Yasin, Z. and Zhang, L. and Sharma, V. and Campagnari, C. and Hong, T. M. and Kovalskyi, D. and Mazur, M. A. and Richman, J. D. and Beck, T. W. and Eisner, A. M. and Heusch, C. A. and Kroseberg, J. and Lockman, W. S. and Martinez, A. J. and Schalk, T. and Schumm, B. A. and Seiden, A. and Winstrom, L. O. and Cheng, C. H. and Doll, D. A. and Echenard, B. and Fang, F. and Hitlin, D. G. and Narsky, I. and Piatenko, T. and Porter, F. C. and Andreassen, R. and Mancinelli, G. and Meadows, B. T. and Mishra, K. and Sokoloff, M. D. and Bloom, P. C. and Ford, W. T. and Gaz, A. and Hirschauer, J. F. and Nagel, M. and Nauenberg, U. and Smith, J. G. and Wagner, S. R. and Ayad, R. and Soffer, A. and Toki, W. H. and Wilson, R. J. and Feltresi, E. and Hauke, A. and Jasper, H. and Karbach, M. and Merkel, J. and Petzold, A. and Spaan, B. and Wacker, K. and Kobel, M. J. and Nogowski, R. and Schubert, K. R. and Schwierz, R. and Volk, A. and Bernard, D. and Bonneaud, G. R. and Latour, E. and Verderi, M. and Clark, P. J. and Playfer, S. and Watson, J. E. and Andreotti, M. and Bettoni, D. and Bozzi, C. and Calabrese, R. and Cecchi, A. and Cibinetto, G. and Franchini, P. and Luppi, E. and Negrini, M. and Petrella, A. and Piemontese, L. and Santoro, V. and Baldini-Ferroli, R. and Calcaterra, A. and De-Sangro, R. and Finocchiaro, G. and Pacetti, S. and Patteri, P. and Peruzzi, I. M. and Piccolo, M. and Rama, M. and Zallo, A. and Contri, R. and Guido, E. and Lo-Vetere, M. and Monge, M. R. and Passaggio, S. and Patrignani, C. and Robutti, E. and Tosi, S. and Chaisanguanthum, K. S. and Morii, M. and Adametz, A. and Marks, J. and Schenk, S. and Uwer, U. and Bernlochner, F. U. and Klose, V. and Lacker, H. M. and Bard, D. J. and Dauncey, P. D. and Tibbetts, M. and Behera, P. K. and Chai, X. and Charles, M. J. and Mallik, U. and Cochran, J. and Crawley, H. B. and Dong, L. and Meyer, W. T. and Prell, S. and Rosenberg, E. I. and Rubin, A. E. and Gao, Y. Y. and Gritsan, A. V. and Guo, Z. J. and Arnaud, N. and Béquilleux, J. and D'Orazio, A. and Davier, M. and Firmino-da-Costa, J. and Grosdidier, G. and Le-Diberder, F. and Lepeltier, V. and Lutz, A. M. and Pruvot, S. and Roudeau, P. and Schune, M. H. and Serrano, J. and Sordini, V. and Stocchi, A. and Wormser, G. and Lange, D. J. and Wright, D. M. and Bingham, I. and Burke, J. P. and Chavez, C. A. and Fry, J. R. and Gabathuler, E. and Gamet, R. and Hutchcroft, D. E. and Payne, D. J. and Touramanis, C. and Bevan, A. J. and Clarke, C. K. and Di-Lodovico, F. and Sacco, R. and Sigamani, M. and Cowan, G. and Paramesvaran, S. and Wren, A. C. and Brown, D. N. and Davis, C. L. and Denig, A. G. and Fritsch, M. and Gradl, W. and Hafner, A. and Alwyn, K. E. and Bailey, D. and Barlow, R. J. and Jackson, G. and Lafferty, G. D. and West, T. J. and Yi, J. I. and Anderson, J. and Chen, C. and Jawahery, A. and Roberts, D. A. and Simi, G. and Tuggle, J. M. and Dallapiccola, G. D. and Salvati, E. and Saremi, S. and Cowan, R. and Dujmic, D. and Fisher, P. H. and Henderson, S. W. and Sciolla, G. and Spitznagel, M. and Yamamoto, R. K. and Zhao, M. and Patel, P. M. and Robertson, S. H. and Schram, M. and Lazzaro, A. and Lombardo, V. and Palombo, F. and Stracka, S. and Bauer, J. M. and Cremaldi, L. and Godang, R. and Kroeger, R. and Summers, D. J. and Zhao, H. W. and Simard, M. and Taras, P. and Nicholson, H. and De-Nardo, G. and Lista, L. and Monorchio, D. and Onorato, G. and Sciacca, C. and Raven, G. and Snoek, H. L. and Jessop, C. P. and Knoepfel, K. J. and LoSecco, J. M. and Wang, W. F. and Corwin, L. A. and Honscheid, K. and Kagan, H. and Kass, R. and Morris, J. P. and Rahimi, A. M. and Regensburger, J. J. and Sekula, S. J. and Wong, Q. K. and Blount, N. L. and Brau, J. and Frey, R. and Igonkina, O. and Kolb, J. A. and Lu, M. and Rahmat, R. and Sinev, N. B. and Strom, D. and Strube, J. and Torrence, E. and Castelli, G. and Gagliardi, N. and Margoni, M. and Morandin, M. and Posocco, M. and Rotondo, M. and Simonetto, F. and Stroili, R. and Voci, C. and del-Amo-Sanchez, P. and Ben-Haim, E. and Briand, H. and Chauveau, J. and Hamon, O. and Leruste, Ph. and Ocariz, J. and Perez, A. and Prendki, J. and Sitt, S. and Gladney, L. and Biasini, M. and Manoni, E. and Angelini, C. and Batignani, G. and Bettarini, S. and Calderini, G. and Carpinelli, M. and Cervelli, A. and Forti, F. and Giorgi, M. A. and Lusiani, A. and Marchiori, G. and Morganti, M. and Neri, N. and Paoloni, E. and Rizzo, G. and Walsh, J. J. and Lopes-Pegna, D. and Lu, C. and Olsen, J. and Smith, A. J. S. and Telnov, A. V. and Anulli, F. and Baracchini, E. and Cavoto, G. and Faccini, R. and Ferrarotto, F. and Ferroni, F. and Gaspero, M. and Jackson, P. D. and Li-Gioi, L. and Mazzoni, M. A. and Morganti, S. and Piredda, G. and Renga, F. and Voena, C. and Ebert, M. and Hartmann, T. and Schröder, H. and Waldi, R. and Adye, T. and Franek, B. and Olaiya, E. O. and Wilson, F. F. and Emery, S. and Esteve, L. and Hamel-de-Monchenault, G. and Kozanecki, W. and Vasseur, G. and Yèche, Ch. and Zito, M. and Chen, X. R. and Liu, H. and Park, W. and Purohit, M. V. and White, R. M. and WIlson, J. R. and Allen, M. T. and Aston, D. and Bartoldus, R. and Benitez, J. F. and Cenci, R. and Coleman, J. P. and Convery, M. R. and Dingfelder, J. C. and Dorfan, J. and Dubois-Felsmann, G. P. and Dunwoodie, W. and Field, R. C. and Gabareen, A. M. and Graham, M. T. and Grenier, P. and Hast, C. and Innes, W. R. and Kaminski, J. and Kelsey, M. H. and Kim, H. and Kim, P. and Kocian, M. L. and Leith, D. W. G. S. and Li, S. and Lindquist, B. and Luitz, S. and Luth, V. and Lynch, H. L. and MacFarlane, D. B. and Marsiske, H. and Messner, R. and Muller, D. R. and Neal, H. and Nelson, S. and O'Grady, C. P. and Ofte, I. and Perl, M. and Ratcliff, B. N. and Roodman, A. and Salnikov, A. A. and Schindler, R. H. and Schwiening, J. and Snyder, A. and Su, D. and Sullivan, M. K. and Suzuki, K. and Swain, S. K. and Thompson, J. M. and Va'vra, J. and Wagner, A. P. and Weaver, M. and West, C. A. and Wisniewski, W. J. and Wittgen, M. and Wright, D. H. and Wulsin, H. W. and Yarritu, A. K. and Yi, K. and Young, C. C. and Ziegler, V. and Burchat, P. R. and Edwards, A. J. and Miyashita, T. S. and Ahmed, S. and Alam, M. S. and Ernst, J. A. and Pan, B. and Saeed, M. A. and Zain, S. B. and Spanier, S. M. and Wogsland, B. J. and Eckmann, R. and Ritchie, J. L. and Ruland, A. M. and Schilling, C. J. and Schwitters, R. F. and Drummond, B. W. and Izen, J. M. and Lou, X. C. and Bianchi, F. and Gamba, D. and Pelliccioni, M. and Bomben, M. and Bosisio, L. and Cartaro, C. and Della-Ricca, G. and Lanceri, L. and Vitale, L. and Azzolini, V. and Lopez-March, N. and Martinez-Vidal, F. and Milanes, D. A. and Oyanguren, A. and Albert, J. and Banerjee, Sw. and Bhuyan, B. and Choi, H. H. F. and Hamano, K. and King, G. J. and Kowalewski, R. and Lewczuk, M. J. and Nugent, I. M. and Roney, J. M. and Sobie, R. J. and Gershon, T. J. and Harrison, P. F. and Ilic , J. and Latham, T. E. and Mohanty, G. B. and Puccio, E. M. T. and Band, H. R. and Chen, X. and Dasu, S. and Flood, K. T. and Pan, Y. and Prepost, R. and Vuosalo, C. O. and Wu, S. L. (2009) Improved Measurement of B^+ → ρ^+ ρ^0 and Determination of the Quark-Mixing Phase Angle α. Physical Review Letters, 102 (14). Art. No. 141802. ISSN 0031-9007. http://resolver.caltech.edu/CaltechAUTHORS:20091029-075304664

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Abstract

We present improved measurements of the branching fraction B, the longitudinal polarization fraction f_L, and the direct CP asymmetry A_(CP) in the B meson decay channel B^+ → p^+p^0. The data sample was collected with the BABAR detector at SLAC. The results are B(B^+ → p^+p^0)=(23.7±1.4±1.4)×10^(-6), f_L=0.950±0.015±0.006, and A_(CP)=-0.054±0.055±0.010, where the uncertainties are statistical and systematic, respectively. Based on these results, we perform an isospin analysis and determine the Cabibbo-Kobayashi-Maskawa phase angle α = arg(-V_(td)V^*_(tb)/V_(ud)V*ub) to be (92.4^(+6.0)_(-6.5))°.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1103/PhysRevLett.102.141802DOIArticle
http://link.aps.org/doi/10.1103/PhysRevLett.102.141802 PublisherArticle
Alternate Title:Improved Measurement of B+ --> rho+rho0 and Determination of the Quark-Mixing Phase Angle alpha
Additional Information:© 2009 The American Physical Society. Received 22 January 2009; published 10 April 2009. We are grateful for the excellent luminosity and machine conditions provided by our PEP-II colleagues and for the substantial dedicated effort from the computing organizations that support BABAR. The collaborating institutions thank SLAC for its support and kind hospitality. This work is supported by DOE and NSF (USA), NSERC (Canada), CEA and CNRS-IN2P3 (France), BMBF and DFG (Germany), INFN (Italy), FOM (The Netherlands), NFR (Norway), MES (Russia), MEC (Spain), and STFC (United Kingdom). Individuals have received support from the Marie Curie EIF (European Union) and the A. P. Sloan Foundation.
Funders:
Funding AgencyGrant Number
Student Labor Action CoalitionUNSPECIFIED
U.S. Department of EnergyUNSPECIFIED
NSFUNSPECIFIED
Natural Sciences and Engineering Research Council (Canada)UNSPECIFIED
Cost Effectiveness AnalysisUNSPECIFIED
Centre National de la Recherche Scientifique (National Center for Scientific Research, France)-Institut National de Physique Nucléaire et Physique des Particules (France)UNSPECIFIED
Bundesministerium für Bildung und Forschung (German: Federal Ministry of Education and Research; Bonn, Germany)UNSPECIFIED
Deutsche Forschungsgemeinschaft (German Research Council)UNSPECIFIED
Istituto Nazionale di Fisica Nucleare, ItalyUNSPECIFIED
FOM (The Netherlands)UNSPECIFIED
NFR (Norway)UNSPECIFIED
MES (Russia)UNSPECIFIED
Ministerio de Educación y Ciencia (Spain: Ministry for Education and Science)UNSPECIFIED
Science and Technology Facilities Council (UK)UNSPECIFIED
Marie Curie EIF (European Union)UNSPECIFIED
A. P. Sloan FoundationUNSPECIFIED
Issue or Number:14
Classification Code:PACS: 13.25.Hw; 12.15.Hh; 11.30.Er
Record Number:CaltechAUTHORS:20091029-075304664
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20091029-075304664
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:16514
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:03 Nov 2009 21:24
Last Modified:16 Sep 2019 18:09

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