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Transverse momentum dependent fragmenting jet functions with applications to quarkonium production

Publication ,  Journal Article
Bain, R; Makris, Y; Mehen, T
Published in: Journal of High Energy Physics
November 1, 2016

We introduce the transverse momentum dependent fragmenting jet function (TMDFJF), which appears in factorization theorems for cross sections for jets with an identified hadron. These are functions of z, the hadron’s longitudinal momentum fraction, and transverse momentum, p⊥, relative to the jet axis. In the framework of Soft-Collinear Effective Theory (SCET) we derive the TMDFJF from both a factorized SCET cross section and the TMD fragmentation function defined in the literature. The TMDFJFs are factorized into distinct collinear and soft-collinear modes by matching onto SCET+. As TMD calculations contain rapidity divergences, both the renormalization group (RG) and rapidity renormalization group (RRG) must be used to provide resummed calculations with next-to-leading-logarithm prime (NLL’) accuracy. We apply our formalism to the production of J/ψ within jets initiated by gluons. In this case the TMDFJF can be calculated in terms of NRQCD (Non-relativistic quantum chromodynamics) fragmentation functions. We find that when the J/ψ carries a significant fraction of the jet energy, the pT and z distributions differ for different NRQCD production mechanisms. Another observable with discriminating power is the average angle that the J/ψ makes with the jet axis.

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Published In

Journal of High Energy Physics

DOI

EISSN

1029-8479

ISSN

1126-6708

Publication Date

November 1, 2016

Volume

2016

Issue

11

Related Subject Headings

  • Nuclear & Particles Physics
  • 5107 Particle and high energy physics
  • 5106 Nuclear and plasma physics
  • 4902 Mathematical physics
  • 0206 Quantum Physics
  • 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics
  • 0105 Mathematical Physics
 

Citation

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Bain, R., Makris, Y., & Mehen, T. (2016). Transverse momentum dependent fragmenting jet functions with applications to quarkonium production. Journal of High Energy Physics, 2016(11). https://doi.org/10.1007/JHEP11(2016)144
Bain, R., Y. Makris, and T. Mehen. “Transverse momentum dependent fragmenting jet functions with applications to quarkonium production.” Journal of High Energy Physics 2016, no. 11 (November 1, 2016). https://doi.org/10.1007/JHEP11(2016)144.
Bain R, Makris Y, Mehen T. Transverse momentum dependent fragmenting jet functions with applications to quarkonium production. Journal of High Energy Physics. 2016 Nov 1;2016(11).
Bain, R., et al. “Transverse momentum dependent fragmenting jet functions with applications to quarkonium production.” Journal of High Energy Physics, vol. 2016, no. 11, Nov. 2016. Scopus, doi:10.1007/JHEP11(2016)144.
Bain R, Makris Y, Mehen T. Transverse momentum dependent fragmenting jet functions with applications to quarkonium production. Journal of High Energy Physics. 2016 Nov 1;2016(11).
Journal cover image

Published In

Journal of High Energy Physics

DOI

EISSN

1029-8479

ISSN

1126-6708

Publication Date

November 1, 2016

Volume

2016

Issue

11

Related Subject Headings

  • Nuclear & Particles Physics
  • 5107 Particle and high energy physics
  • 5106 Nuclear and plasma physics
  • 4902 Mathematical physics
  • 0206 Quantum Physics
  • 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics
  • 0105 Mathematical Physics