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APS » Journals » Phys. Rev. Lett. » Volume 90 » Issue 8
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Phys. Rev. Lett. 90, 082301 (2003) [4 pages]

Light from Cascading Partons in Relativistic Heavy-Ion Collisions

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Steffen A. Bass1,2, Berndt Müller1, and Dinesh K. Srivastava3,*
1Department of Physics, Duke University, Durham, North Carolina 27708-0305
2RIKEN BNL Research Center, Brookhaven National Laboratory, Upton, New York 11973
3Physics Department, McGill University, 3600 University Street, Montreal, Canada H3A 2T8

Received 10 September 2002; published 25 February 2003

We calculate the production of high energy photons from Compton and annihilation processes as well as fragmentation off quarks in the parton cascade model. The multiple scattering of partons is seen to lead to a substantial production of high energy photons, which rises further when parton multiplication due to final state radiation is included. The photon yield is found to be directly proportional to the number of hard collisions and thus provides valuable information on the preequilibrium reaction dynamics.

© 2003 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.90.082301
DOI:
10.1103/PhysRevLett.90.082301
PACS:
25.75.–q, 12.38.Mh

*On leave from Variable Energy Cyclotron Centre, 1/AF Bidhan Nagar, Kolkata 700 064, India.

 
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