Angular distribution of μ pairs from hadronic υ production

Hadronic transitions Υ ( 2 S ) → Υ ( 1 S )

Υ and Υ ′ Leptonic Widths , a b μ , and m b from full lattice

Precision luminosity measurement at LHC using two - photon production of μ + μ − pairs

The application of the two-photon process pp → pp+μμ for the luminosity measurements at LHC with the ATLAS detector is considered. The expected accuracy of the absolute offline luminosity determination is 1 ÷ 2 % for the luminosity range of 10 ÷10 cm s. The preliminary cross section estimates done for LHCb promise the same level of the luminosity measurement accuracy at L = 2 · 10 cm s.

Evidence for Bs Production at the Υ(5s) from Cleo and Properties of the Υ(4s) from Babar

The Υ(4S) is the lowest bb̄ resonance above BB̄ threshold. Its mass and total width had been measured in scans of the total ee cross-section at center of mass energy around 10.58 GeV. 1,2,3,4 The Υ(4S) decays into BB andBB̄ modes allowing these particles to be carefully studied. Many B branching fractions had been measured from Υ(4S) data. Most of them, however, based on the assumption of equal pr...

Charmonium production from the hadronic phase

Charmonium production from the hadron gas formed in ultra-relativistic heavy-ion collisions is studied. Using the J/ψ-hadron absorption cross section determined from the nonperturbative quark-exchange model, which has a peak value similar to that used in the comover model for J/ψ suppression and a thermally averaged value consistent from that extracted from J/ψ data in heavy-ion collisions, we ...