Heavy quarkonia spectroscopy and decays

Mahlke-Kruger, Hanna

Report/Contribution to a conference proceedings

PUBDB-2016-03523

Heavy quarkonia spectroscopy and decays

Mahlke-Kruger, H. (Corresponding author)

2003

23rd International Conference on Physics in Collision, PIC 2003, Zeuthen, Germany, 26 Jun 2003 - 28 Jun 2003 204-217 (2003)

Report No.: PIC-2003-SAAT02; hep-ex/0309015

Abstract: The experimental status of stable bound states made out of heavy quarks is reviewed. The need for a way to deal with the non-perturbative transitions involved calls for precision measurements on one hand, and for discovery of as yet undetected states to confirm predictions on the other. In this article, recent experimental contributions to heavy quarkonia spectroscopy and decay will be reviewed, mostly from data analyzed by the BES and CLEO collaborations. The most dramatic recent discoveries include the detection of the first stable L=2 state, and a first non-pionic hadronic transition in the Upsilon system, and a first measurement of chi_cJ --> Lambda Lambdabar. Scans of the psi' and Upsilon(1,2,3S) resonances are used to add information on partial and total decay widths.

Keyword(s): talk: Zeuthen 2003/06/26 ; electron positron: colliding beams ; electron positron: annihilation ; charmonium ; bottomonium ; quarkonium: electroproduction ; quarkonium: hadron spectroscopy ; quarkonium: hadronic decay ; quarkonium: radiative decay ; quarkonium: leptonic decay ; quarkonium: branching ratio ; experimental results ; BES ; Beijing Stor ; CLEO ; Cornell CESR Stor