Quarkonia and their transitions

Single eta production in heavy quarkonia transitions

The η production in the (n, n ′) bottomonium transitions Υ(n) → Υ(n ′)η, is studied in the method used before for dipion heavy quarko-nia transitions. The widths Γ η (n, n ′) are calculated without fitting parameters for n = 2, 3, 4, 5, n ′ = 1.Resulting Γ η (4, 1) is found to be large in agreement with recent data.

Scalar Glueball, Scalar Quarkonia, and their Mixing

The isosinglet scalar mesons f0(1710), f0(1500), f0(1370) and their mixing are studied. We employ two recent lattice results as the starting point; one is the isovector scalar meson a0(1450) which displays an unusual property of being nearly independent of quark mass for quark masses smaller than that of the strange, and the other is the scalar glueball mass at 1710 MeV in the quenched approxim...

Cleo Results on Transitions in Heavy Quarkonia A

Recent CLEO results on electromagnetic and hadronic transitions in charmonium and bot-tomonium systems are reviewed.

Common Transitions and Their Meanings

Nrqcd and Quarkonia

Quarkonia play an important role in several high energy experiments. The diversity, quantity and accuracy of the data still under analysis and currently being collected is impressive and includes: data on quarkonium formation from BES at the Beijing Electron Positron Collider (BEPC), E835 at Fermilab, and CLEO at the Cornell Electron Storage Ring (CESR); clean samples of charmonia produced in B...