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Title: Nonperturbative corrections to soft drop jet mass

Journal Article · · Journal of High Energy Physics (Online)
ORCiD logo [1];  [2]; ORCiD logo [3];  [4]
  1. Univ. of Vienna (Austria); Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
  2. Univ. of North Georgia, Dahlonega, GA (United State)
  3. Univ. of Vienna (Austria)
  4. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)

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.

Research Organization:
Massachusetts Institute of Technology (MIT), Cambridge, MA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
Grant/Contract Number:
SC0011090
OSTI ID:
1635604
Journal Information:
Journal of High Energy Physics (Online), Journal Name: Journal of High Energy Physics (Online) Journal Issue: 12 Vol. 2019; ISSN 1029-8479
Publisher:
Springer BerlinCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (2)

Measurement of soft-drop jet observables in p p collisions with the ATLAS detector at s = 13     TeV journal March 2020
Measurement of soft-drop jet observables in pp collisions with the ATLAS detector at s =13 TeV text January 2020

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