Speaker
Daniel Berenyi
(Wigner RCP of the Hungarian Academy of Sciences, Hungary)
Description
In the early stage of relativistic heavy ion collisions a strong coherent gluonic field could form. This phenomenon is usually described by the string model and it became the basis of successful Monte Carlo event generators. The usual string picture can be connected to an assumption of a static homogeneous gluonic field. On the other hand during the collision one expects large inhomogeneities of the gluonic field in space-time. With the help of the relativistic Wigner function formalism one can describe the phase-space evolution of pair production in such fields. Our model of fermion-pair production indicates that not only the time variation plays an important role and has strong influence on the transverse momentum spectra of the newly produced particles, but the space inhomogeneities could completely change the interpretation of the string picture. As a result we demonstrate that most of the new particles are not produced in the bulk, scaling with the volume, instead one finds a scaling with $\propto V ^{\frac{2}{3}}$, in accordance with the early prediction of Heisenberg.
Primary author
Daniel Berenyi
(Wigner RCP of the Hungarian Academy of Sciences, Hungary)
Co-authors
Peter Levai
(Wigner RCP of the Hungarian Academy of Sciences, Hungary)
Sandor Varro
(Wigner RCP of the Hungarian Academy of Sciences, Hungary)
Vladimir Skokov
(Department of Physics, Western Michigan University, USA)
