Observation of New Resonant Structures in γγωϕ, ϕϕ, and ωω

Z. Q. Liu et al. (Belle Collaboration)
Phys. Rev. Lett. 108, 232001 – Published 8 June 2012


The processes γγωϕ, ϕϕ, and ωω are measured using an 870fb1 data sample collected with the Belle detector at the KEKB asymmetric-energy e+e collider. Production of vector meson pairs is clearly observed and their cross sections are measured for masses that range from threshold to 4.0 GeV. In addition to signals from well established spin-zero and spin-two charmonium states, there are resonant structures below charmonium threshold, which have not been previously observed. We report a spin-parity analysis for the new structures and determine the products of the ηc, χc0, and χc2 two-photon decay widths and branching fractions to ωϕ, ϕϕ, and ωω.

  • Figure
  • Figure
  • Figure
  • Received 25 February 2012


© 2012 American Physical Society

Authors & Affiliations

Click to Expand

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand

Vol. 108, Iss. 23 — 8 June 2012

Reuse & Permissions
Access Options

Article Available via CHORUS

Download Accepted Manuscript
Heating up of Superconductors
January 27, 2017

This collection marks the 30th anniversary of the discovery of high-temperature superconductors. The papers selected highlight some of the advances that have been made to date, both in understanding why these compounds behave in the way they do, and in utilizing them in applications. The papers included in the collection have been made free to read.

APS and CERN Sign Open Access Agreement for SCOAP3

APS and CERN, the host organization of SCOAP3 (Sponsoring Consortium for Open Access Publishing in Particle Physics), have signed an agreement to make the high-energy physics (HEP) articles published in three leading APS journals open access beginning January 1, 2018. This agreement acts to support the publishing of open access content for wider benefit of the HEP community.

Authorization Required




Sign up to receive regular email alerts from Physical Review Letters

Log In



Article Lookup

Paste a citation or DOI

Enter a citation