SN0213 : Two Photon Physics at RHIC
Updated on Sat, 2007-07-14 01:38. Originally created by chajecki on 2007-06-18 19:57.
| Author(s) | : | S. Klein |
| Date | : | Jun. 14, 1995 |
| File(s) | : | sn0213.ps.gz |
| Abstract | : | Because the two photon cross section is proportional to Z$^4$, heavy ion colliders offer an unmatched luminosity. However, because nuclei have finite sizes, the photon spectrum is gradually cut off by a nuclear form factor. For RHIC, this cutoff occurs at a few GeV; below this energy, RHIC will have the highest two photon luminosity in the world when it turns on. In addition to the high rates, because Z X alpha ~ 0.6, the nuclear environment provides a window to strong field QED and new phenomena like multiple pair production. To study two photon physics, regions where the nuclei interact hadronically must be avoided; this leads to roughly a factor of two loss in usable luminosity. The rates expected by the Solenoidal Tracker at RHIC (STAR) collaboration will be given. Backgrounds will be discussed, along with several rejection techniques. |
| Keywords | : | photons physics |
| Category | : | PWG |
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