Low Mass Lepton Pair Production in Hadron Collisions
Low Mass Lepton Pair Production in Hadron Collisions

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Published: 1999

Total Pages: 8

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The hadroproduction of lepton pairs with mass Q and transverse momentum Q{sub T} can be described in perturbative QCD by the same partonic subprocesses as prompt photon production. They demonstrate that, like prompt photon production, lepton pair production is dominated by quark-gluon scattering in the region Q{sub T}> Q/2. This leads to sensitivity to the gluon density in kinematical regimes that are accessible both at collider and fixed target experiments while eliminating the theoretical and experimental uncertainties present in prompt photon production.

Lepton-pair Production in Hadron-nucleus Collisions
Lepton-pair Production in Hadron-nucleus Collisions

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Published: 1988

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The general features of lepton pair production are reviewed. Physics motivations for precision measurements of lepton pair production in nuclei are discussed. Preliminary results from Fermilab experiment E772 are presented. The relevance of these results to the EMC effects and to J//psi/ suppression in heavy ion collisions is also discussed. 73 refs., 26 figs., 2 tabs.

Massive Lepton Pair Production in Hadronic Collisions. [Review, Drell-Yan Quark Annihilation, Scaling Violations].
Massive Lepton Pair Production in Hadronic Collisions. [Review, Drell-Yan Quark Annihilation, Scaling Violations].

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Published: 1978

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A review is presented of theoretical attempts to describe the massive lepton pair continuum produced in hadronic collisions. Beginning with the classical Drell-Yan quark-antiquark annihilation model, its expectations are compared with data. Scaling violations and corrections to the Drell-Yan pictured are discussed. Next, original work is presented bearing on the understanding of the transverse momentum distributions of the dileptons. In a parton model, the quark-gluon scattering graphs which provide scaling violations also endow the dileptons with relatively large (P/sub T/). Comparisons with available data support these QCD expectations; further tests of the QCD predictions are proposed. Implications are drawn for W production experiments, and predictions are presented for reactions initiated by antiprotons.

Review of the Theory and Phenomenology of Lepton Pair Production. [Review Drell-Yan Mechanism, Parton Distribution, Gluon Radiation, Quantum Chromodynamics, Transverse Momentum].
Review of the Theory and Phenomenology of Lepton Pair Production. [Review Drell-Yan Mechanism, Parton Distribution, Gluon Radiation, Quantum Chromodynamics, Transverse Momentum].

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Published: 1978

Total Pages:

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Recent experimental data and theoretical developments on the production of lepton pairs in hadron collisions are reviewed. With emphasis on the interplay between theory and experiment, the relevance of theoretical calculations to the data available at present energies is critically examined. The Drell--Yan mechanism is found to be phenomenologically dominant provided that the parton distribution functions contain effects of gluon radiation in a narrow cone. Explicit QCD perturbative calculations of the non-Drell--Yan type yield results that are apparently important at large transverse momenta, but are contradicated by subsequent data at 400 GeV and below. A consistent picture in the parton model is sketched. Further experiments to probe the basic mechanism are suggested. 83 references.