Observation ofe+e−→γX(3872)at BESIII

2013/10/31 by BESIII collaboration, M. Ablikim, X. Ai +385 · 1 citation
Physics and Astronomy · #Computer science #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ex

paper · pdf · doi:10.1103/physrevlett.112.092001

published as Phys. Rev. Lett. 112, 092001 (2014) · Final version published in PRL

arxiv created 2014/01/15 · openalex publication_date 2014/03/03 · arxiv updated 2014/06/19 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

With data samples collected with the BESIII detector operating at the BEPCII storage ring at center-of-mass energies from 4.009 to 4.420 GeV, the process e⁺e^\ensuremath-\ensuremath→\ensuremathγX(3872) is observed for the first time with a statistical significance of 6.3\ensuremathσ. The measured mass of the X(3872) is (3871.9\ifmmode±\else\textpm\fi0.7_stat\ifmmode±\else\textpm\fi0.2_syst) MeV/c², in agreement with previous measurements. Measurements of the product of the cross section \ensuremathσ[e⁺e^\ensuremath-\ensuremath→\ensuremathγX(3872)] and the branching fraction B[X(3872)\ensuremath→\ensuremathπ⁺\ensuremathπ^\ensuremath-J/\ensuremathψ] at center-of-mass energies 4.009, 4.229, 4.260, and 4.360 GeV are reported. Our measurements are consistent with expectations for the radiative transition process Y(4260)\ensuremath→\ensuremathγX(3872).

Citations

• Observation and Properties of theX(3872)Decaying toJ/ψπ+π−inpp¯Collisions ats=1.96 TeV
• Review of Particle Physics
• PHOTOS Monte Carlo: a precision tool for QED correctionsin Z and W decays
• Study of theB−→J/ψK−π+π−decay and measurement of theB−→X(3872)K−branching fraction
• The precision Monte Carlo event generator for two-fermion final states in collisions
• Observation of a New Narrow Charmonium State in Exclusive B+-->K+ pi+pi- J/psi Decays

Cited by

• Exotic hadrons with heavy flavors: X, Y, Z, and related states

Related

• Observation of ψ(3770)→ηJ/ψ
• Observation of resonant contribution to the e⁺e^-→ Ω^-Ω⁺ around 4.2 GeV and evidence of ψ(3770)→ Ω^-Ω⁺
• Measurement of the branching fraction of η→ μ⁺ μ^- and search for η→ e⁺ e^-
• Measurement of e⁺e^-→ϕη' cross sections at center-of-mass energies from 3.508 to 4.951 GeV and search for the decay ψ(3770)→ϕη'
• Measurement of e⁺e^-→ ωη^′ cross sections at √(s)= 2.000 to 3.080 GeV