Massive lepton pairs as a prompt photon surrogate

Journal Article · Sun Mar 01 04:00:00 EST 1998 · Phys.Rev. D58 (1998) 074012

DOI:https://doi.org/10.1103/PhysRevD.58.074012· OSTI ID:755911

Berger, Edmond L; Gordon, Lionel E; Klasen, Michael

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, Newport News, VA (US)
• 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
• Journal Information: Phys.Rev. D58 (1998) 074012, Journal Name: Phys.Rev. D58 (1998) 074012 Journal Issue: 7 Vol. 58; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
DIFFERENTIAL CROSS SECTIONS
GLUONS
PAIR PRODUCTION
PERTURBATION THEORY
PROTON-NUCLEON INTERACTIONS
QUANTUM CHROMODYNAMICS
TEV RANGE 01-10
TRANSVERSE MOMENTUM