“School of Particles”
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| Paper IPM / Particles / 14123 |
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| Abstract: | |||||
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Heavy quarkonium production is a powerful implement to study the strong interaction
dynamics and QCD theory. Fragmentation is the dominant production mechanism for
heavy quarkonia with large transverse momentum. With the large heavy quark mass,
the relative motion of the heavy quark pair inside a heavy quarkonium is effectively
nonrelativistic and it is also well known that their fragmentation functions can be
calculated in the perturbative QCD framework. Here, we analytically calculate the
process-independent fragmentation functions for a gluon to split into the spin-singlet
and spin-triplet S-wave heavy quarkonia using three different scenarios. We will show
that the fragmentation probability of the gluon into the spin-triplet bound-state is the
biggest one.
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