Phys. Rev. Lett. 84, 5049 - 5052 (2000)Universality in the Nuclear Dependence Coefficient α(qT) |
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This Week's Milestone Letters are from 1974: |
Xiaofeng Guo1, Jianwei Qiu2, and Xiaofei Zhang2
1Department of Physics and Astronomy, University of Kentucky, Lexington, Kentucky 40506
2Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011
Received 24 November 1999
We derive the nuclear dependence coefficient α(qT) for Drell-Yan and J/ψ production. We show that at small qT, α(qT) is given by a universal functional form: α(qT) = a+bqT2, and the parameters a and b are completely determined by either perturbatively calculable or independently measurable quantities. This universal functional form α(qT) is insensitive to A, and is consistent with existing data.
©2000 The American Physical Society
URL: http://link.aps.org/abstract/PRL/v84/p5049
DOI: 10.1103/PhysRevLett.84.5049
PACS: 24.85.+p, 12.38.-t, 13.85.Qk, 25.40.Ve
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