Combined fit toBABARand Belle data one+e−→π+π−ψ(2S)

2008/05/23 by Z. Q. Liu, Zhiqing Liu, X. S. Qin +1 · 4 citations
Physics and Astronomy · #Atomic physics #Crystallography #Energy (signal processing) #High-Energy Particle Collisions Research #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #hep-ex

paper · pdf · doi:10.1103/physrevd.78.014032

published as Phys.Rev.D78:014032,2008 · 8 pages, 4 figures

arxiv created 2008/05/23 · openalex publication_date 2008/07/31 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

A combined fit is performed to the BABAR and Belle measurements of the e⁺e^\ensuremath-\ensuremath→\ensuremathπ⁺\ensuremathπ^\ensuremath-\ensuremathψ(2S) cross sections for center-of-mass energy between threshold and 5.5 GeV. The resonant parameters of the Y(4360) and Y(4660) are determined. The mass is 4355_\ensuremath-10⁺⁹\ifmmode±\else\textpm\fi9 MeV/c² and the width is 103_\ensuremath-15⁺¹⁷\ifmmode±\else\textpm\fi11 MeV/c² for the Y(4360), and the mass is 4661_\ensuremath-8⁺⁹\ifmmode±\else\textpm\fi6 MeV/c² and the width is 42_\ensuremath-12⁺¹⁷\ifmmode±\else\textpm\fi6 MeV/c² for the Y(4660). The production of the Y(4260) in \ensuremathπ⁺\ensuremathπ^\ensuremath-\ensuremathψ(2S) mode is found to be at 2\ensuremathσ level, and B(Y(4260)\ensuremath→\ensuremathπ⁺\ensuremathπ^\ensuremath-\ensuremathψ(2S))\ifmmode⋅\else\textperiodcentered\fi\ensuremathΓ_e⁺e^\ensuremath- is found to be less than 4.3 eV/c² at the 90% confidence level, or equal to 7.4_\ensuremath-1.7^+2.1 eV/c² depending on whether it interferes with the Y(4360) constructively or destructively. This information will shed light on the understanding of the nature of the Y states observed in initial state radiation processes.

Citations

• Observation of a Resonancelike Structure in theπ+−ψ′Mass Distribution in ExclusiveB→Kπ+−ψ′Decays
• The new heavy mesons: A status report
• Charmonium: Comparison with experiment
• Observation of a New Narrow Charmonium State in Exclusive B+-->K+ pi+pi- J/psi Decays
• Review of Particle Physics

Cited by

• MULTIPLE SOLUTIONS IN EXTRACTING PHYSICS INFORMATION FROM EXPERIMENTAL DATA
• Cross sections for the reactions e⁺e^-→ K⁺K^-π⁺π^-(π⁰), K⁺K^-K⁺K^-(π⁰), π⁺π^-π⁺π^-(π⁰), ppπ⁺π^-(π⁰) in the energy region between 3.773 and 4.600 GeV
• Measurement ofe+e−→Ds(*)+Ds(*)−cross sections near threshold using initial-state radiation
• A MATHEMATICAL REVIEW ON THE MULTIPLE-SOLUTION PROBLEM