The upper limit of the e+e- partial width of X(3872)

Details The upper limit of the e+e- partial width of X(3872) The upper limit of the e+e- partial width of X(3872)

2003-10-22

arxiv.org/abs/hep-ph/0310261v2

Phys.Lett.B579:74-78,2004

Physics

High Energy Physics

High Energy Physics - Phenomenology

5 pages, 1 figure

Scientific paper

10.1016/j.physletb.2003.10.080

The e+e- decay partial width of the recently observed state, X(3872), is estimated using the ISR data collected at the center of mass energy 4.03 GeV in e+e- annihilation experiment by BES at BEPC. It is found that the product of the e+e- partial width and X(3872) --> pi+ pi- J/psi decay branching fraction is less than 10 eV at 90 % confidence level if the J(PC) of X(3872) is 1(--). Together with the potential models and other information, we conclude that X(3872) is very unlikely to be a vector state.

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