Deuteron Photodissociation in Ultraperipheral Relativistic Heavy-Ion on Deuteron Collisions

Details Deuteron Photodissociation in Ultraperipheral Relativistic Heavy-Ion on Deuteron Collisions Deuteron Photodissociation in Ultraperipheral Relativistic Heavy-Ion on Deuteron Collisions

2003-03-24

arxiv.org/abs/nucl-ex/0303013v2

Phys.Rev. C68 (2003) 017902

Physics

Nuclear Physics

Nuclear Experiment

Final version, to appear in Phys. Rev. C. Diffractive dissociation included 10 pages with 3 figures

Scientific paper

10.1103/PhysRevC.68.017902

In ultraperipheral relativistic deuteron on heavy-ion collisions, a photon emitted from the heavy nucleus may dissociate the deuterium ion. We find deuterium breakup cross sections of 1.38 barns for deuterium-gold collisions at a center of mass energy of 200 GeV per nucleon, as studied at the Relativistic Heavy Ion Collider, and 2.49 barns for deuterium-lead collisions at a center of mass energy of 6.2 TeV, as proposed for the Large Hadron Collider. This cross section includes an energy-independent 140 mb contribution from hadronic diffractive dissociation. At the LHC, the cross section is as large as that of hadronic interactions. The estimated error is 5%. Deuteron dissociation could be used as a luminosity monitor and a `tag' for moderate impact parameter collisions.

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