Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1999-09-27
Phys.Lett. B468 (1999) 294-298
Physics
High Energy Physics
High Energy Physics - Phenomenology
8 pages (Latex), 3 figures (Postscript)
Scientific paper
10.1016/S0370-2693(99)01215-0
The fragmentation functions D_{a -> H}(x,mu^2) of a heavy hadron H, with mass m_H, satisfy the phase-space constraint D_{a - > H}(x,mu^2)=0 for x < m_H^2/mu^2, which is violated by the naive mu^2 evolution equations. Using appropriately generalized mu^2 evolution equations, we reconsider the inclusive hadroproduction of prompt J/psi mesons with high transverse momenta in the framework of the factorization formalism of nonrelativistic quantum chromodynamics, and determine the resulting shifts in the values of the leading colour-octet matrix elements, which are fitted to data from the Fermilab Tevatron.
Kniehl Bernd A.
Zwirner Lennart
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