Nonperturbative corrections to soft drop jet mass
Name
13130_2019_Article_11897.pdf
Size
4.06 MB
Format
Adobe PDF
Checksum (MD5)
6b0f18cb25298a0a6381c634ae0f1ddf
Author(s)
Hoang, André H.
Mantry, Sonny
Pathak, Aditya
Stewart, Iain W
Date Issued
December 2019
Journal
Journal of High Energy Physics
Publisher
Springer Science and Business Media LLC
Citation
Hoang, André H. et al. "Nonperturbative corrections to soft drop jet mass." Journal of High Energy Physics. 2019, 12 (December 2019): 2
Version
Final published version
Abstract
We provide a quantum field theory based description of the nonperturbative effects from hadronization for soft drop groomed jet mass distributions using the soft- collinear effective theory and the coherent branching formalism. There are two distinct regions of jet mass mJ where grooming modifies hadronization effects. In a region with intermediate mJ an operator expansion can be used, and the leading power corrections are given by three universal nonperturbative parameters that are independent of all kinematic variables and grooming parameters, and only depend on whether the parton initiating the jet is a quark or gluon. The leading power corrections in this region cannot be described by a standard normalized shape function. These power corrections depend on the kinematics of the subjet that stops soft drop through short distance coefficients, which encode a perturbatively calculable dependence on the jet transverse momentum, jet rapidity, and on the soft drop grooming parameters zcut and β. Determining this dependence requires a resummation of large logarithms, which we carry out at LL order. For smaller mJ there is a nonperturbative region described by a one-dimensional shape function that is unusual because it is not normalized to unity, and has a non-trivial dependence on β.
MIT Department
Massachusetts Institute of Technology. Center for Theoretical Physics
Terms of Use
Creative Commons Attribution
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1007/JHEP12(2019)002
