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Quantum-chromodynamic approach for the large-transverse-momentum production of particles and jets

Feynman, R. P. and Field, R. D. and Fox, G. C. (1978) Quantum-chromodynamic approach for the large-transverse-momentum production of particles and jets. Physical Review D, 18 (9). pp. 3320-3343. ISSN 2470-0010. doi:10.1103/PhysRevD.18.3320.

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It is shown that if, in a calculation of high-transverse-momentum (p⊥) meson production in hadron-hadron collisions, one includes not only the scale-breaking effects that might be expected from asymptotically free theories but also the effects due to the transverse momentum of quarks in hadrons and further adds contributions from quark-gluon and gluon-gluon scattering to those of quark-quark scattering then the results are not inconsistent with the data. The approach yields the correct magnitude and an apparent approximate 1/p⊥8 behavior in accord with single-particle data for the energy range currently observed. Two-particle correlations are examined. Because of scale-breaking effects and the presence of gluons, the theory does not have the problem of predicting too many away-side hadrons at large p⊥ as did an earlier quark-quark scattering "black-box" approach. We conclude that the quantum-chromodynamics approach is in reasonable accord with the data although theoretical uncertainties (especially at low p⊥) make incontrovertible conclusions impossible at present. Crucial tests of the theory require higher p⊥ than are now available; estimates for this region are made.

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Additional Information:©1978 The American Physical Society. Received 15 May 1978. We acknowledge useful discussions with S. Brodesky, S. Ellis, H. D. Politzer, and D. Sivers. This work was supported in part by the U. S. Department of Energy under Contract No. EY76-C-03-0068.
Issue or Number:9
Record Number:CaltechAUTHORS:FEYprd78
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:3557
Deposited By: Tony Diaz
Deposited On:16 Jun 2006
Last Modified:08 Nov 2021 19:57

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