Search for X(3872) in Untagged gamma gamma Fusion and Initial State Radiation Production with CLEO III

2004/08/13 by Z. Metreveli, CLEO Collaboration, Metreveli, Z. +1
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #Nuclear physics research studies #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ex

paper · pdf · doi:10.48550/arxiv.hep-ex/0408057

9 pages postscript,also available through http://www.lns.cornell.edu/public/CONF/2004/, Presented at ICHEP Aug 16-22,2004, Beijing, China

openalex publication_date 2004/08/13 · arxiv created 2004/08/19 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We report on an exclusive search for the X(3872) state in the decay pi+ pi- J/psi, J/psi to l+ l- (l = e, mu) from untagged gamma-gamma fusion and initial state radiation production using a 15.1 fb-1 data sample with the CLEO III detector. By taking advantage of the unique pi+ pi- J/psi decay kinematics, separate measurements for each production process are obtained. No signals are observed and preliminary upper limits have been established as [(2J+1)*Width_gamgam(X(3872))*BR(X(3872) to pi+ pi- J/psi)] < 12.9 eV and [Width_ee(X(3872))*BR(X(3872) to pi+ pi- J/psi)] < 8.0 eV, both at a 90% confidence level.

Related

• Evidence for X(3872)-->gamma J/psi and the sub-threshold decay X(3872)-->omega J/psi
• Search for a scalar partner of the X(3872) via ψ(3770) decays into γηη' and γπ⁺π^-J/ψ
• Properties of the X(3872) at Belle
• Search for Charmonium States Decaying to J/psi gamma gamma Using Initial-State Radiation Events
• Search for an X(3872) charged partner in the decay mode X- ->J/psi pi- pi0 in the B meson decays B0 -> X- K+ and B- -> X- Ks