Probing small x parton densities in ultraperipheral AA and pAcollisions at the LHC

Journal Article · Thu Sep 15 00:00:00 EDT 2005 · Physical Review Letters

OSTI ID:878703

Strikman, Mark; Vogt, Ramona; White, Sebastian

We calculate photoproduction rates for several hard processes in ultraperipheral proton-lead and lead-lead collisions at the LHC with {radical}s{sub NN} = 8.8 and 5.5 TeV respectively which could be triggered in the large LHC detectors. We use ATLAS as an example. The lead ion is treated as a source of (coherently produced) photons with energies and intensities greater than those of equivalent ep collisions at HERA.We find very large rates for both inclusive and diffractive production which will extend the HERA x range by nearly an order of magnitude for similar virtualities. We demonstrate that it is possible to reach the kinematic regime where nonlinear effects are larger than at HERA.

• Research Organization: Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
• Sponsoring Organization: USDOE Director. Office of Science. Office of NuclearPhysics, DEFG02-93ER40771, DE-AC02-98CH10886
• DOE Contract Number: DE-AC02-05CH11231
• OSTI ID: 878703
• Report Number(s): LBNL-57843; PRLTAO; R&D Project: NTCOST; BnR: KB0301020; TRN: US0602437
• Journal Information: Physical Review Letters, Vol. 96, Issue 8; Related Information: Journal Publication Date: 03/03/2006; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
74 ATOMIC AND MOLECULAR PHYSICS
LEAD IONS
PARTONS
PHOTONS
PHOTOPRODUCTION
PRODUCTION