Fragmentation of charm to charmonium in [Formula omitted] and [Formula omitted] collisions

Fragmentation of charm to charmonium in [Formula omitted] and [Formula omitted] collisions

We perform numerical comparison of the fragmentation mechanism of charmonium production ( [Formula omitted] followed by [Formula omitted]) with the full leading order calculation ( [Formula omitted] at [Formula omitted]). We conclude that the non-fragmentation contributions remain important up to [F...

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Veröffentlicht in:The European physical journal. C, Particles and fields Particles and fields, 2019-03, Vol.79 (3), p.1-6
Hauptverfasser: Baranov, S. P, Kopeliovich, B. Z
Format: Artikel
Sprache:eng
Schlagworte:
Charm (particle physics)
Fragmentation
Quarks
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Zusammenfassung:We perform numerical comparison of the fragmentation mechanism of charmonium production ( [Formula omitted] followed by [Formula omitted]) with the full leading order calculation ( [Formula omitted] at [Formula omitted]). We conclude that the non-fragmentation contributions remain important up to [Formula omitted] transverse momenta about as large as 40 GeV, thus making questionable the applicability of the fragmentation approximation at smaller transverse momenta.
ISSN:1434-6044
1434-6052
DOI:10.1140/epjc/s10052-019-6700-0