Revisiting heavy ion collisions under the influence of strong magnetic fields

The quark-gluon plasma (QGP) phase refers to matter where quarks and gluons are believed to be deconfined and it probably takes place at temperatures of the order of 150 to 170 MeV. In large colliders around the world (RHIC/BNL, ALICE/CERN, GSI, etc), physicists are trying to convert hadronic matter...

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Bibliographic Details
Main Authors: Paoli, M. G. de, Menezes, D. P.
Format: Conference Proceeding
Language:English
Subjects:
BARYONS
BOSE-EINSTEIN GAS
BROOKHAVEN RHIC
COLLIDING BEAMS
FERMI GAS MODEL
GLUONS
GOLD 197 REACTIONS
LEAD 208 BEAMS
LEAD 208 REACTIONS
MAGNETIC FIELDS
MEV RANGE
MULTIPARTICLE SPECTROMETERS
MULTIPLE PRODUCTION
NUCLEAR PHYSICS AND RADIATION PHYSICS
PARTICLE IDENTIFICATION
PHASE TRANSFORMATIONS
PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
QUARK MATTER
QUARKS
RELATIVISTIC RANGE
TIME DEPENDENCE
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Summary:The quark-gluon plasma (QGP) phase refers to matter where quarks and gluons are believed to be deconfined and it probably takes place at temperatures of the order of 150 to 170 MeV. In large colliders around the world (RHIC/BNL, ALICE/CERN, GSI, etc), physicists are trying to convert hadronic matter at these order of temperatures into QGP by looking at non-central heavy ion collisions. Possible experiments towards this search are Au-Au collisions at RHIC/BNL and Pb-Pb collisions at SPS/CERN, where the hadron abundances and particle ratios are used in order to determine the temperature and baryonic chemical potential of the possibly present hadronic matter-QGP phase transition. The magnetic fields involved in heavy-ion collisions, although time dependent and short-lived, can reach intensities higher than the ones considered in magnetars, around 1.7 Multiplication-Sign 10{sup 19} to 10{sup 20} Gauss. In fact, the densities related to the chemical potentials obtained within the relativistic models framework developed in previous works are very low (of the order of 10{sup -3} fm{sup -3}). At these densities the nuclear interactions are indeed very small and this fact made us consider the possibility of free Fermi and Boson gases under the unfluence of strong magnetic fields. We investigate the effects of magnetic fields of the order of 10{sup 18}, 10{sup 19} and 10{sup 20} G through a {chi}{sup 2} fit to some data sets of the STAR experiment. Our results shown that a field of the order of 10{sup 19} G can produce a much better fit to the experimental data than the calculations without magnetic fields.
ISSN:0094-243X
1551-7616
DOI:10.1063/1.4804121