Mutual heavy ion dissociation in peripheral collisions at ultrarelativistic energies

Details Mutual heavy ion dissociation in peripheral collisions at ultrarelativistic energies Mutual heavy ion dissociation in peripheral collisions at ultrarelativistic energies

2001-01-17

arxiv.org/abs/nucl-th/0101035v2

Phys.Rev.C64:024903,2001

Physics

Nuclear Physics

Nuclear Theory

46 pages with 7 tables and 13 figures, numerical integration accuracy improved, next-to-leading-order corrections included

Scientific paper

10.1103/PhysRevC.64.024903

We study mutual dissociation of heavy nuclei in peripheral collisions at ultrarelativistic energies. Earlier this process was proposed for beam luminosity monitoring via simultaneous registration of forward and backward neutrons in zero degree calorimeters at Relativistic Heavy Ion Collider. Electromagnetic dissociation of heavy ions is considered in the framework of the Weizsacker-Williams method and simulated by the RELDIS code. Photoneutron cross sections measured in different experiments and calculated by the GNASH code are used as input for the calculations of dissociation cross sections. The difference in results obtained with different inputs provides a realistic estimation for the systematic uncertainty of the luminosity monitoring method. Contribution to simultaneous neutron emission due to grazing nuclear interactions is calculated within the abrasion model. Good description of CERN SPS experimental data on Au and Pb dissociation gives confidence in predictive power of the model for AuAu and PbPb collisions at RHIC and LHC.

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