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- Title
Direct fragmentation of quarkonia including Fermi motionusing light-cone wave function.
- Authors
Gomshi Nobary, M. A.; Javadi, B.
- Abstract
We investigate the effect of Fermi motion on the direct fragmentation of the $J/\psi$ and $\Upsilon$ states employing a light-cone wave function. Consistent with such a wave function we set up the kinematics of a heavy quark fragmenting into quarkonia such that the Fermi motion of the constituents splits into a longitudinal as well as a transverse direction and thus calculate the fragmentation functions for these states. In the framework of our investigation, we estimate that the fragmentation probabilities of $J/\psi$ and $\Upsilon$ may increase at least up to 14 percent when including this degree of freedom.
- Subjects
QUARKS; PARTICLES (Nuclear physics); QUANTUM flavor dynamics; QUARK confinement; ANALYSIS of variance; NUCLEAR physics
- Publication
European Physical Journal C -- Particles & Fields, 2005, Vol 42, Issue 1, p37
- ISSN
1434-6044
- Publication type
Article
- DOI
10.1140/epjc/s2005-02266-1