Journal
COMPUTER PHYSICS COMMUNICATIONS
Volume 153, Issue 2, Pages 244-274Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S0010-4655(03)00204-2
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This paper describes the fortran program rhad which performs a numerical evaluation of the photon-induced hadronic R-ratio, R(s), related to the cross section for electron-positron annihilation, for a given center-of-mass energy roots. In rhad the state-of-the-art perturbative corrections to R(s) are implemented and the running and decoupling of the strong coupling constant and the quark masses is automatically treated consistently. Several options allow for a flexible use of the program. (C) 2003 Elsevier Science B.V. All rights reserved.
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