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Measurement of the γγ* → π⁰ transition form factor

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 Martinelli, M. 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 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 Wang, L. and Winstrom, L. O. and Cheng , C. H. and Doll, D. A. and Echenard, B. and Fang , F. and Hitlin, D. 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 Toki, W. H. and Wilson, R. J. and Feltresi, E. and Hauke, A. and Jasper, H. and Karbach, T. 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 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 Fioravanti, E. and Franchini, P. and Luppi, E. and Munerato, M. 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 Charles, M. J. and Mallik, U. and Cochran, J. and Crawley, H. B. and Dong, L. and Eyges, V. 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 Derkach, D. and Firmino da Costa, J. and Grosdidier, G. and Le Diberder, F. and Lepeltier, V. and Lutz, A. M. and Malaescu, B. 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, C. 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 Sonnek, P. 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 Bonneaud, G. R. and Briand, H. and Chauveau, J. and Hamon, O. and Leruste, Ph. and Marchiori, G. 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 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, 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 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 Franco Sevilla, M. 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 Young, C. C. and Ziegler, V. and Chen, X. R. and Liu, H. and Park, W. and Purohit, M. V. and White, R. M. and WIlson, J. R. 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 Soffer, A. 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 Wray, B. C. 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) Measurement of the γγ* → π⁰ transition form factor. Physical Review D, 80 (5). 052002. ISSN 2470-0010. http://resolver.caltech.edu/CaltechAUTHORS:20091112-113543931

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Abstract

We study the reaction e^(+)e^(-) → e^(+)e^(-)π^0 in the single tag mode and measure the differential cross section dσ/dQ^2 and the γγ* → π^0 transition form factor in the momentum transfer range from 4 to 40 GeV^2. At Q^2 > 10 GeV^2 the measured form factor exceeds the asymptotic limit predicted by perturbative QCD. The analysis is based on 442 fb^(-1) of integrated luminosity collected at PEP-II with the BABAR detector at e^(+)e^(-) center-of-mass energies near 10.6 GeV.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1103/PhysRevD.80.052002DOIArticle
http://link.aps.org/doi/10.1103/PhysRevD.80.052002PublisherArticle
Alternate Title:Measurement of the gamma gamma* ---> pi0 transition form factor, Measurement of the γγ* → π^0 transition form factor
Additional Information:© 2009 American Physical Society. Received 29 May 2009; published 11 September 2009.
Funders:
Funding AgencyGrant Number
U. S. Department of EnergyUNSPECIFIED
NSFUNSPECIFIED
Natural Sciences and Engineering Research Council (Canada)UNSPECIFIED
Commissariat à l'Énergie Atomique (France)UNSPECIFIED
Institut National de Physique Nucléaire et de Physique des Particules (France)UNSPECIFIED
Bundesministerium für Bildung und Forschung (Germany)UNSPECIFIED
Deutsche Forschungsgemeinschaft (Germany)UNSPECIFIED
Istituto Nazionale di Fisica Nucleare (Italy)UNSPECIFIED
Foundation for Fundamental Research on Matter (The Netherlands)UNSPECIFIED
Research Council of NorwayUNSPECIFIED
Ministry of Science and Technology of the Russian FederationUNSPECIFIED
Ministerio de Educación y Ciencia (Spain)UNSPECIFIED
Science and Technology Facilities Council (United Kingdom)UNSPECIFIED
Marie-Curie IEF program (European Union)UNSPECIFIED
A. P. Sloan FoundationUNSPECIFIED
Issue or Number:5
Classification Code:PACS numbers: 14.40.Aq, 13.40.Gp, 12.38.Qk
Record Number:CaltechAUTHORS:20091112-113543931
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20091112-113543931
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:16685
Collection:CaltechAUTHORS
Deposited By: Jason Perez
Deposited On:16 Nov 2009 23:10
Last Modified:16 Sep 2019 20:53

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