Massive lepton pairs as a prompt photon surrogate
The authors discuss the transverse momentum distribution for the production of massive lepton-pairs in hadron reactions at fixed target and collider energies within the context of next-to-leading order perturbative quantum chromodynamics. For values of the transverse momentum Q{sub T} greater than the pair mass Q, Q{sub T} > Q, they show that the differential cross section is dominated by subprocesses initiated by incident gluons. Massive lepton-pair differential cross sections are an advantageous source of constraints on the gluon density, free from the experimental and theoretical complications of photon isolation that beset studies of prompt photon production. They compare calculations with data and provide predictions for the differential cross section as a function of Q{sub T} in proton-antiproton reactions at center-of-mass energies of 1.8 TeV, and in proton-nucleon reactions at fixed target and LHC energies.
- Research Organization:
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
- Sponsoring Organization:
- USDOE Office of Energy Research (ER) (US)
- DOE Contract Number:
- AC05-84ER40150
- OSTI ID:
- 755911
- Report Number(s):
- DOE/ER/40150-1488; JLAB-THY-98-11; ANL-HEP-PR-98-27; hep-ph/9803387; TRN: US0002591
- Journal Information:
- Phys.Rev. D58 (1998) 074012, Vol. 58, Issue 7; Other Information: Submitted to Phys.Rev. D58 (1998) 074012; PBD: 1 Mar 1998; ISSN 0556--2821
- Country of Publication:
- United States
- Language:
- English
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