Quark fragmentation into spin-triplet S-wave quarkonium

Geoffrey T. Bodwin; Hee Sok Chung; U. Rae Kim; Jungil Lee

doi:10.1103/PhysRevD.91.074013

Quark fragmentation into spin-triplet S-wave quarkonium

Geoffrey T. Bodwin, Hee Sok Chung, U. Rae Kim, Jungil Lee

Department of Physics

Research output: Contribution to journal › Article › peer-review

11 Citations (Scopus)

Abstract

We compute fragmentation functions for a quark to fragment to a quarkonium through an S-wave spin-triplet heavy quark-antiquark pair. We consider both color-singlet and color-octet heavy quark-antiquark (QQ¯) pairs. We give results for the case in which the fragmenting quark and the quark that is a constituent of the quarkonium have different flavors and for the case in which these quarks have the same flavors. Our results for the sum over all spin polarizations of the QQ¯ pairs confirm previous results. Our results for longitudinally polarized QQ¯ pairs agree with previous calculations for the same flavor cases and correct an error in a previous calculation for the different-flavor case.

Original language	English
Article number	074013
Journal	Physical Review D - Particles, Fields, Gravitation and Cosmology
Volume	91
Issue number	7
DOIs	https://doi.org/10.1103/PhysRevD.91.074013
Publication status	Published - 2015 Apr 8

ASJC Scopus subject areas

Nuclear and High Energy Physics
Physics and Astronomy (miscellaneous)

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abstract = "We compute fragmentation functions for a quark to fragment to a quarkonium through an S-wave spin-triplet heavy quark-antiquark pair. We consider both color-singlet and color-octet heavy quark-antiquark (QQ¯) pairs. We give results for the case in which the fragmenting quark and the quark that is a constituent of the quarkonium have different flavors and for the case in which these quarks have the same flavors. Our results for the sum over all spin polarizations of the QQ¯ pairs confirm previous results. Our results for longitudinally polarized QQ¯ pairs agree with previous calculations for the same flavor cases and correct an error in a previous calculation for the different-flavor case.",

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AU - Bodwin, Geoffrey T.

AU - Chung, Hee Sok

AU - Kim, U. Rae

AU - Lee, Jungil

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N2 - We compute fragmentation functions for a quark to fragment to a quarkonium through an S-wave spin-triplet heavy quark-antiquark pair. We consider both color-singlet and color-octet heavy quark-antiquark (QQ¯) pairs. We give results for the case in which the fragmenting quark and the quark that is a constituent of the quarkonium have different flavors and for the case in which these quarks have the same flavors. Our results for the sum over all spin polarizations of the QQ¯ pairs confirm previous results. Our results for longitudinally polarized QQ¯ pairs agree with previous calculations for the same flavor cases and correct an error in a previous calculation for the different-flavor case.

AB - We compute fragmentation functions for a quark to fragment to a quarkonium through an S-wave spin-triplet heavy quark-antiquark pair. We consider both color-singlet and color-octet heavy quark-antiquark (QQ¯) pairs. We give results for the case in which the fragmenting quark and the quark that is a constituent of the quarkonium have different flavors and for the case in which these quarks have the same flavors. Our results for the sum over all spin polarizations of the QQ¯ pairs confirm previous results. Our results for longitudinally polarized QQ¯ pairs agree with previous calculations for the same flavor cases and correct an error in a previous calculation for the different-flavor case.

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