Precise measurement of the e+e- --> pi+pi-(gamma) cross section with the initial state radiation method at BABAR

• Published in: Physical review letters Vol. 103; no. 23; p. 231801
• Main Authors: Aubert, B, Karyotakis, Y, Lees, J P, Poireau, V, Prencipe, E, Prudent, X, Tisserand, V, Garra Tico, J, Grauges, E, Martinelli, M, Palano, A, Pappagallo, M, Eigen, G, Stugu, B, Sun, L, Battaglia, M, Brown, D N, Hooberman, B, Kerth, L T, Kolomensky, Yu G, Lynch, G, Osipenkov, I L, Tackmann, K, Tanabe, T, Hawkes, C M, Soni, N, Watson, A T, Koch, H, Schroeder, T, Asgeirsson, D J, Hearty, C, Mattison, T S, McKenna, J A, Barrett, M, Khan, A, Randle-Conde, A, Blinov, V E, Bukin, A D, Buzykaev, A R, Druzhinin, V P, Golubev, V B, Onuchin, A P, Serednyakov, S I, Skovpen, Yu I, Solodov, E P, Todyshev, K Yu, Bondioli, M, Curry, S, Eschrich, I, Kirkby, D, Lankford, A J, Lund, P, Mandelkern, M, Martin, E C, Stoker, D P, Atmacan, H, Gary, J W, Liu, F, Long, O, Vitug, G M, Yasin, Z, Sharma, V, Campagnari, C, Hong, T M, Kovalskyi, D, Mazur, M A, Richman, J D, Beck, T W, Eisner, A M, Heusch, C A, Kroseberg, J, Lockman, W S, Martinez, A J, Schalk, T, Schumm, B A, Seiden, A, Wang, L, Winstrom, L O, Cheng, C H, Doll, D A, Echenard, B, Fang, F, Hitlin, D G, Narsky, I, Ongmongkolkul, P, Piatenko, T, Porter, F C, Andreassen, R, Mancinelli, G, Meadows, B T, Mishra, K, Sokoloff, M D, Bloom, P C, Ford, W T, Gaz, A, Hirschauer, J F, Nagel, M, Nauenberg, U, Smith, J G, Wagner, S R
• Format: Journal Article
• Language: English
• Published: United States American Physical Society 04-12-2009
• Subjects: ANNIHILATION; ANTILEPTONS; ANTIMATTER; ANTIPARTICLES; BOSONS; CENTER-OF-MASS SYSTEM; CROSS SECTIONS; ELECTRON-POSITRON INTERACTIONS; ELECTRONS; ELEMENTARY PARTICLES; ENERGY RANGE; FERMIONS; GEV RANGE; GEV RANGE 01-10; HADRONS; High Energy Physics - Experiment; INTERACTIONS; LEPTON-LEPTON INTERACTIONS; LEPTONS; LUMINOSITY; MATTER; MESONS; Mesons (Física nuclear); Mesons (Nuclear physics); MUONS; MUONS MINUS; MUONS PLUS; OPTICAL PROPERTIES; PAIR PRODUCTION; PARTICLE INTERACTIONS; PARTICLE PRODUCTION; Particles (Nuclear physics); Partícules (Física nuclear); PHYSICAL PROPERTIES; Physics; PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; PIONS; PIONS MINUS; PIONS PLUS; POSITRONS; PSEUDOSCALAR MESONS
• ISSN: 0031-9007; 1079-7114
• DOI: 10.1103/PhysRevLett.103.231801

A precise measurement of the cross section of the process e(+)e(-) --> pi(+)pi(-)(gamma) from threshold to an energy of 3 GeV is obtained with the initial state radiation (ISR) method using 232 fb(-1) of data collected with the BABAR detector at e(+)e(-) center-of-mass energies near 10.6 GeV. The ISR luminosity is determined from a study of the leptonic process e(+)e(-) --> mu(+)mu(-)gamma(gamma). The leading-order hadronic contribution to the muon magnetic anomaly calculated using the pipi cross section measured from threshold to 1.8 GeV is (514.1 +/- 2.2(stat) +/- 3.1(syst)) x 10(-10).