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Title: Spin dependence of massive lepton pair production in proton-proton collisions

Abstract

The authors calculate the transverse momentum distribution for the production of massive lepton-pairs in longitudinally polarized, proton-proton collider energies within the context of perturbative quantum chromodynamics. For values of the transverse momentum Q{sub {Tau}} greater than roughly half the pair mass Q, Q{sub {Tau}} > Q/2, they show that the differential cross section is dominated by subprocesses initiated by incident gluons, provided that the polarized gluon density is not too small. Massive lepton-pair differential cross sections should be a good source of independent constraints on the polarized gluon density, free from the experimental and theoretical complications of photon isolation that beset studies of prompt photon production. They provide predictions for the spin-averaged and spin-dependent differential cross sections as a function of Q{sub {Tau}} at energies relevant for the Relativistic Heavy Ion Collider (RHIC) at Brookhaven, and they compare these with predictions for real prompt photon production.

Authors:
; ;
Publication Date:
Research Org.:
Thomas Jefferson National Accelerator Facility, Newport News, VA (US)
Sponsoring Org.:
USDOE Office of Energy Research (ER) (US)
OSTI Identifier:
753179
Report Number(s):
DOE/ER/40150-1286; ANL-HEP-PR-99-97; JLAB-THY-99-27
TRN: US0300465
DOE Contract Number:  
AC05-84ER40150
Resource Type:
Journal Article
Resource Relation:
Other Information: No journal information given for this preprint; PBD: 20 Sep 1999; PBD: 20 Sep 1999
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 74 ATOMIC AND MOLECULAR PHYSICS; DIFFERENTIAL CROSS SECTIONS; DISTRIBUTION; GLUONS; HEAVY IONS; LEPTONS; PAIR PRODUCTION; PHOTONS; PRODUCTION; QUANTUM CHROMODYNAMICS; SPIN; TRANSVERSE MOMENTUM

Citation Formats

Berger, E., Gordon, L.E., and Klasen, M. Spin dependence of massive lepton pair production in proton-proton collisions. United States: N. p., 1999. Web.
Berger, E., Gordon, L.E., & Klasen, M. Spin dependence of massive lepton pair production in proton-proton collisions. United States.
Berger, E., Gordon, L.E., and Klasen, M. Mon . "Spin dependence of massive lepton pair production in proton-proton collisions". United States. https://www.osti.gov/servlets/purl/753179.
@article{osti_753179,
title = {Spin dependence of massive lepton pair production in proton-proton collisions},
author = {Berger, E. and Gordon, L.E. and Klasen, M.},
abstractNote = {The authors calculate the transverse momentum distribution for the production of massive lepton-pairs in longitudinally polarized, proton-proton collider energies within the context of perturbative quantum chromodynamics. For values of the transverse momentum Q{sub {Tau}} greater than roughly half the pair mass Q, Q{sub {Tau}} > Q/2, they show that the differential cross section is dominated by subprocesses initiated by incident gluons, provided that the polarized gluon density is not too small. Massive lepton-pair differential cross sections should be a good source of independent constraints on the polarized gluon density, free from the experimental and theoretical complications of photon isolation that beset studies of prompt photon production. They provide predictions for the spin-averaged and spin-dependent differential cross sections as a function of Q{sub {Tau}} at energies relevant for the Relativistic Heavy Ion Collider (RHIC) at Brookhaven, and they compare these with predictions for real prompt photon production.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1999},
month = {9}
}