arXiv subjects

C. Rosenzweig

Publications and source records attributed to C. Rosenzweig.

2 recordsLinked to original sources

arXiv2000

Escape of Superheated Upsilons from the Quark Gluon Plasma

The properties of heavy quark systems change if they are placed in a medium other than the low energy vacuum. In a hot Quark Gluon Plasma $J/Ψ$ particles will melt and not exist as resonant states. $Υ$'s, however, because of their smaller size and the dominance of the Coulomb potential, will still form as $Q\bar Q$ bound states but their properties will shift. In particular the $Υ$ mass may be shifted upward by over 100 MeV. If such excited states manage to escape from the plasma as a superheated particle, they may serve as a diagnostic of the plasma in which they originated. We propose that such a scenario is possible and that hot $Υ$'s will form and escape, thereby providing us with crucial information about the Quark Gluon Plasma.

hep-ph↗

arXiv1994

Semiclassical Decay of Excited String States on Leading Regge Trajectories

We study the decay of hadrons based on a semiclassical string model. By including quark mass effects we find that the width to mass ratio $\G/m$ is an increasing function of $m$, which increases most rapidly for massive quarks. This is consistent with the available data. The decay probability of hadrons on the leading Regge trajectories is computed taking the effect of the string rotation into account. The resulting decay probability is no longer uniform along the length of the string but varies in a manner that is in qualitative agreement with the available data. We argue in favour of possible experiments that would test our predictions more accurately and help open a window to the nonperturbative aspects of QCD.

hep-ph↗