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From underlying event sensitive to insensitive: factorization and resummation

Publication ,  Journal Article
Kang, D; Makris, Y; Mehen, T
Published in: Journal of High Energy Physics
September 1, 2018

In this paper we study the transverse energy spectrum for the Drell-Yan process. The transverse energy is measured within the central region defined by a (pseudo-) rapidity cutoff. Soft-collinear effective theory (SCET) is used to factorize the cross section and resum large logarithms of the rapidity cutoff and ratios of widely separated scales that appear in the fixed order result. We develop a framework which can smoothly interpolate between various regions of the spectrum and eventually match onto the fixed order result. This way a reliable calculation is obtained for the contribution of the initial state radiation to the measurement. By comparing our result for Drell-Yan against Pythia we obtain a simple model that describes the contribution from multiparton interactions (MPI). A model with little or no dependence on the primary process gives results in agreement with the simulation. Based on this observation we propose MPI insensitive measurements. These observables are insensitive to the MPI contributions as implemented in Pythia and we compare against the purely perturbative result obtained with the standard collinear factorization.

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Published In

Journal of High Energy Physics

DOI

EISSN

1029-8479

ISSN

1126-6708

Publication Date

September 1, 2018

Volume

2018

Issue

9

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
 

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Kang, D., Makris, Y., & Mehen, T. (2018). From underlying event sensitive to insensitive: factorization and resummation. Journal of High Energy Physics, 2018(9). https://doi.org/10.1007/JHEP09(2018)055
Kang, D., Y. Makris, and T. Mehen. “From underlying event sensitive to insensitive: factorization and resummation.” Journal of High Energy Physics 2018, no. 9 (September 1, 2018). https://doi.org/10.1007/JHEP09(2018)055.
Kang D, Makris Y, Mehen T. From underlying event sensitive to insensitive: factorization and resummation. Journal of High Energy Physics. 2018 Sep 1;2018(9).
Kang, D., et al. “From underlying event sensitive to insensitive: factorization and resummation.” Journal of High Energy Physics, vol. 2018, no. 9, Sept. 2018. Scopus, doi:10.1007/JHEP09(2018)055.
Kang D, Makris Y, Mehen T. From underlying event sensitive to insensitive: factorization and resummation. Journal of High Energy Physics. 2018 Sep 1;2018(9).
Journal cover image

Published In

Journal of High Energy Physics

DOI

EISSN

1029-8479

ISSN

1126-6708

Publication Date

September 1, 2018

Volume

2018

Issue

9

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