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Title: An improved limit for Γ ee of X(3872) and Γ ee measurement of ψ(3686)

In this study, using the data sets taken at center-of-mass energies above 4 GeV by the BESIII detector at the BEPCII storage ring, we search for the reaction e⁺e⁻ → γ ISRX(3872) → γ ISRπ +π -J/ψ via the Initial State Radiation technique. The production of a resonance with quantum numbers J PC=1 ++ such as the X(3872) via single photon e⁺e⁻ annihilation is forbidden, but is allowed by a next-to-leading order box diagram.
  1. Inst. of High Energy Physics, Geijing (China). et al.
Publication Date:
OSTI Identifier:
Grant/Contract Number:
FG02-04ER41291; FG02-05ER41374; FG02-94ER40823; SC0010118; DESC0010118
Published Article
Journal Name:
Physics Letters. Section B
Additional Journal Information:
Journal Volume: 749; Journal Issue: C; Journal ID: ISSN 0370-2693
Research Org:
Univ. of Hawaii, Honolulu, HI (United States); Indiana Univ., Bloomington, IN (United States); Carnegie Mellon University, Pittsburgh, PA (United States)
Sponsoring Org:
Contributing Orgs:
BESIII Collaboration
Country of Publication:
United States
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; X(3872); ψ(3686); Γee; charmonium spectroscopy; BESIII