22-28 July 2010
Palais des Congrès de Paris
Europe/Paris timezone

Studies with Initial State Radiation at BABAR

23 Jul 2010, 14:25
Salle 253 ()

Salle 253

Parallel Session Talk 04 - Hadronic Structure, Parton Distributions, soft QCD, Spectroscopy 04 - Hadronic Structure, Parton Distributions, soft QCD, Spectroscopy


Evgeniy Solodov (BudkerINP)


* Initial State Radiation Physics Studies at BABAR We present recent results obtained at BABAR from low energy e+e- annihilations, produced via initial state radiation. Low energy hadronic cross sections provide essential experimental input for calculating hadronic corrections to the muon anomalous magnetic moment, while studies of final states and intermediate structures with unprecedented accuracy can reveal new bound states and help elucidate their properties. We present new measurements of e+e- -> K+K-pi+pi-, K+K-pi0pi0, 2(K+K-) based on the full data set including investigations of signals from phi(1020)2pi and phi(1020)f_0(980) intermediate states. The evaluation of Y(2175) -> phi f_0(980) parameters are presented along with measurements of the J/psi and psi(2S) BFs to these final states. The BaBar measurement of pi^+pi^- and other channels important for calculating the hadronic contribution to the muon magnetic moment anomaly will be discussed. * Associated charm baryon production in Initial State Radiation events and measurements of the Y(4260) state produced in e+e--->gamma_ISR J/psi pi+pi- We present an analysis of a threshold enhancement observed in (Lambda_c+ anti-Lamba_c-) pairs produced in the reaction e+e--->gamma_ISR Lambda_c+ anti-Lambac-. This study uses data collected with the BABAR detector operating at the SLAC PEP-II B-factory. We also report on updated mass and width measurements for the Y(4260)--> J/psi pi+pi- produced in initial state radiation events using 454 fb^-1 of BaBar data.

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