/ 96 05 00 1 v 1 1 M ay 1 99 6 Transversal Flow of Pions as a Consequence of Rescattering Process

1 v 2 6 M ay 1 99 6 Transversal Flow of Pions as a Consequence of Rescattering Process

Aim of this work was to test the idea of J.-Y.Ollitrault about the parallel squeeze-out type of transversal flow in mid-rapidity region [1]. For this purpose we have performed a computer simulation of the expanding pion gas created in non-central Pb-Pb 158GeV/n collisions. A squeeze-out type of asymmetry parallel to impact parameter in az-imuthal distribution of pions is found and studied. The ...

ar X iv : h ep - t h / 96 05 03 8 v 1 7 M ay 1 99 6 DAMTP 96 - 45 φ 4 Kinks - Gradient Flow and Dynamics

The symmetric dynamics of two kinks and one antikink in classical (1+1)dimensional φ theory is investigated. Gradient flow is used to construct a collective coordinate model of the system. The relationship between the discrete vibrational mode of a single kink, and the process of kink-antikink pair production is explored. ∗ e-mail address: [email protected] † e-mail address: M.Houari@d...

ar X iv : h ep - p h / 96 05 28 2 v 1 1 1 M ay 1 99 6 TWO TOPICS IN PARTICLE - ANTIPARTICLE MIXING

ar X iv : m at h / 99 05 00 1 v 1 [ m at h . A G ] 1 M ay 1 99 9 Tacnodes and cusps

ar X iv : h ep - p h / 96 05 34 7 v 1 1 7 M ay 1 99 6 Neutrinos and Electromagnetic Gauge Invariance

It is discussed a recently proposed connection among U(1) em electromagnetic gauge invariance and the nature of the neutrino mass terms in the framework