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Title: Predictions for energy correlators probing substructure of groomed heavy quark jets

Abstract

We develop an effective field theory (EFT) framework to perform an analytic calculation for energy correlator observables computed on groomed heavy-quark jets. A soft-drop grooming algorithm is applied to a jet initiated by a massive quark to minimize soft contamination effects such as pile-up and multi-parton interactions. We specifically consider the two-particle energy correlator as an initial application of this EFT framework to compute heavy quark jet substructure. We find that there are different regimes for the event shapes, depending on the size of the measured correlator observable, that require the use of different EFT formulations, in which the quark mass and grooming parameters may be relevant or not. We use the EFT to resum large logarithms in the energy correlator observable in terms of the momentum of a reconstructed heavy hadron to NLL' accuracy and subsequently match it to a full QCD O(α s) cross section, which we also compute. We compare our predictions to simulations in Pythia for e +e – collisions. We find a good agreement with partonic simulations, as well as hadronic ones with an appropriate shape function used to describe nonperturbative effects and the heavy quark hadron decay turned off. We also predict the scalingmore » behavior for the leading nonperturbative power correction due to hadronization. Consequently, we can give a prediction for the energy correlator distribution at the level of the reconstructed heavy hadron. This work provides a general framework for the analysis of heavy quark jet substructure observables.« less

Authors:
ORCiD logo [1];  [2];  [1]
+ Show Author Affiliations
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States). Theoretical Div., Group T-2
  2. Carnegie Mellon Univ., Pittsburgh, PA (United States). Dept. of Physics
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE Laboratory Directed Research and Development (LDRD) Program
OSTI Identifier:
1571592
Report Number(s):
LA-UR-18-24853
Journal ID: ISSN 1029-8479
Grant/Contract Number:  
89233218CNA000001
Resource Type:
Accepted Manuscript
Journal Name:
Journal of High Energy Physics (Online)
Additional Journal Information:
Journal Name: Journal of High Energy Physics (Online); Journal Volume: 2019; Journal Issue: 9; Journal ID: ISSN 1029-8479
Publisher:
Springer Berlin
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Atomic; Nuclear and Particle Physics; Jets; QCD Phenomenology

Citation Formats

Lee, Christopher, Shrivastava, Prashant, and Vaidya, Varun. Predictions for energy correlators probing substructure of groomed heavy quark jets. United States: N. p., 2019. Web. doi:10.1007/JHEP09(2019)045.
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Lee, Christopher, Shrivastava, Prashant, & Vaidya, Varun. Predictions for energy correlators probing substructure of groomed heavy quark jets. United States. doi:10.1007/JHEP09(2019)045.
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Lee, Christopher, Shrivastava, Prashant, and Vaidya, Varun. Fri . "Predictions for energy correlators probing substructure of groomed heavy quark jets". United States. doi:10.1007/JHEP09(2019)045. https://www.osti.gov/servlets/purl/1571592.
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@article{osti_1571592,
title = {Predictions for energy correlators probing substructure of groomed heavy quark jets},
author = {Lee, Christopher and Shrivastava, Prashant and Vaidya, Varun},
abstractNote = {We develop an effective field theory (EFT) framework to perform an analytic calculation for energy correlator observables computed on groomed heavy-quark jets. A soft-drop grooming algorithm is applied to a jet initiated by a massive quark to minimize soft contamination effects such as pile-up and multi-parton interactions. We specifically consider the two-particle energy correlator as an initial application of this EFT framework to compute heavy quark jet substructure. We find that there are different regimes for the event shapes, depending on the size of the measured correlator observable, that require the use of different EFT formulations, in which the quark mass and grooming parameters may be relevant or not. We use the EFT to resum large logarithms in the energy correlator observable in terms of the momentum of a reconstructed heavy hadron to NLL' accuracy and subsequently match it to a full QCD O(αs) cross section, which we also compute. We compare our predictions to simulations in Pythia for e+e– collisions. We find a good agreement with partonic simulations, as well as hadronic ones with an appropriate shape function used to describe nonperturbative effects and the heavy quark hadron decay turned off. We also predict the scaling behavior for the leading nonperturbative power correction due to hadronization. Consequently, we can give a prediction for the energy correlator distribution at the level of the reconstructed heavy hadron. This work provides a general framework for the analysis of heavy quark jet substructure observables.},
doi = {10.1007/JHEP09(2019)045},
journal = {Journal of High Energy Physics (Online)},
number = 9,
volume = 2019,
place = {United States},
year = {2019},
month = {9}
}
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DOI:  10.1007/JHEP09(2019)045
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