%0 Journal Article
%T Study of the reaction e(+)e(-) -> J/psi pi(+)pi(-) via initial-state radiation at BABAR
%A BABAR Collaboration (Lees, J. P. et al
%A Martinez-Vidal, F.
%A Oyanguren, A.
%J Physical Review D
%D 2012
%V 86
%N 5
%I Amer Physical Soc
%@ 1550-7998
%G English
%F BABARCollaborationLees_etal2012
%O WOS:000308641900001
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=1175), last updated on Fri, 26 Oct 2012 12:14:46 +0000
%X We study the process e(+)e(-) -> J/psi pi(+)pi(-) with initial-state-radiation events produced at the PEP-II asymmetric-energy collider. The data were recorded with the BABAR detector at center-of-mass energies 10.58 and 10.54 GeV, and correspond to an integrated luminosity of 454 fb(-1). We investigate the J/psi pi(+)pi(-) mass distribution in the region from 3.5 to 5.5 GeV/c(2). Below 3.7 GeV/c(2) the psi (2S) signal dominates, and above 4 GeV/c(2) there is a significant peak due to the Y(4260). A fit to the data in the range 3.74-5.50 GeV/c(2) yields a mass value 4245 +/- 5(stat) +/- 4(syst) MeV/c(2) and a width value 114(-15)(+16)(stat) +/- 7(syst) MeV for this state. We do not confirm the report from the Belle Collaboration of a broad structure at 4.01 GeV/c(2). In addition, we investigate the pi(+)pi(-) system which results from Y(4260) decay.
%R 10.1103/PhysRevD.86.051102
%U http://arxiv.org/abs/arXiv:1204.2158
%U https://doi.org/10.1103/PhysRevD.86.051102
%P 051102-9pp