Study of the Exclusive Initial-State-Radiation Production of the DDbar System
High Energy Physics - Experiment
2007-11-14 v2
Abstract
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.
Cite
@article{arxiv.0710.1371,
title = {Study of the Exclusive Initial-State-Radiation Production of the DDbar System},
author = {The BABAR Collaboration and B. Aubert},
journal= {arXiv preprint arXiv:0710.1371},
year = {2007}
}
Comments
8 pages, 5 postscript figures, submitted to Physical Review D, Rapid Communications. Modified text and figures