ar X iv : n uc l - ex / 0 40 30 26 v 1 1 5 M ar 2 00 4 Resonance Production Patricia

ar X iv : n uc l - ex / 0 40 30 26 v 2 5 M ay 2 00 4 Resonance Production

Recent results on ρ(770), K(892), f0(980), φ(1020), ∆(1232) , and Λ(1520) production in A+A and p + p collisions at SPS and RHIC energies are presented. These resonances are measured via their hadronic decay channels and used as a sensitive tool to examine the collision dynamics in the hadronic medium through their decay and regeneration. The modification of resonance mass, width, and shape due...

ar X iv : n uc l - th / 0 40 30 40 v 1 1 5 M ar 2 00 4 Photon production from non - equilibrium QGP in heavy ion collisions

We present a calculation of thermal photon production i.e. photons from secondary interactions among particles produced in heavy ion collisions at collider energies. This is done within the framework of hydrodynamics. We take into account the lack of chemical equilibrium in QGP. It turns out that main effects from chemical non-equilibrium composition of QGP, reduction of particle number and inc...

ar X iv : n uc l - ex / 0 30 50 34 v 2 1 4 Ju n 20 03 ρ ( 770 ) 0 and f 0 ( 980 ) Production in Au + Au and pp

ar X iv : n uc l - ex / 0 41 10 48 v 1 2 4 N ov 2 00 4 Compton Scattering by the Nucleon ⋆

The status of Compton scattering by the nucleon at energies of the first and second resonance is summarized. In addition to a general test of dispersion theories and a precise determination of polarizabilities, the validities of four fundamental sum rules are explored. Recommended averages of experimental values for the electromagnetic polarizabilities and spin-polarizabilities of the nucleon a...

ar X iv : n uc l - th / 0 40 30 36 v 1 1 4 M ar 2 00 4 Recombination Models

We review the current status of recombination and coalescence models that have been successfully applied to describe hadronization in heavy ion collisions at RHIC energies. Basic concepts as well as actual implementations of the idea are discussed. We try to evaluate where we stand in our understanding at the moment and what remains to be done in the future.