Study of the Exclusive Initial-State-Radiation Production of the DDbar System

Details Study of the Exclusive Initial-State-Radiation Production of the DDbar System Study of the Exclusive Initial-State-Radiation Production of the DDbar System

2007-10-06

arxiv.org/abs/0710.1371v2

Physics

High Energy Physics

High Energy Physics - Experiment

8 pages, 5 postscript figures, submitted to Physical Review D, Rapid Communications. Modified text and figures

Scientific paper

A search for charmonium and other new states is performed in a study of exclusive initial-state-radiation production of D Dbar events from electron-positron annihilations at a center-of-mass energy of 10.58 GeV. The data sample corresponds to an integrated luminosity of 384 fb-1 and was recorded by the BABAR experiment at the PEP-II storage ring. The D Dbar mass spectrum shows clear evidence of the psi(3770) plus other structures near 3.9, 4.1, and 4.4 GeV/c^2. No evidence for Y(4260) -> D Dbar is observed, leading to an upper limit of B(Y(4260) -> D Dbar)/B(Y(4260) -> J/psi pi+ pi-) < 1.0 at 90 % confidence level.

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