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Title: From underlying event sensitive to insensitive: factorization and resummation

Abstract

In this study 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.

Authors:
 [1]; ORCiD logo [2];  [3]
  1. Fudan Univ., Shanghai (China)
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  3. Duke Univ., Durham, NC (United States)
Publication Date:
Research Org.:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1471360
Report Number(s):
LA-UR-18-21306
Journal ID: ISSN 1029-8479
Grant/Contract Number:  
AC52-06NA25396
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: 2018; Journal Issue: 9; Journal ID: ISSN 1029-8479
Publisher:
Springer Berlin
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; Atomic and Nuclear Physics; Jets, Factorization, Resummation, Effective Field Theory

Citation Formats

Kang, Daekyoung, Makris, Yiannis, and Mehen, Thomas. From underlying event sensitive to insensitive: factorization and resummation. United States: N. p., 2018. Web. doi:10.1007/JHEP09(2018)055.
Kang, Daekyoung, Makris, Yiannis, & Mehen, Thomas. From underlying event sensitive to insensitive: factorization and resummation. United States. https://doi.org/10.1007/JHEP09(2018)055
Kang, Daekyoung, Makris, Yiannis, and Mehen, Thomas. Tue . "From underlying event sensitive to insensitive: factorization and resummation". United States. https://doi.org/10.1007/JHEP09(2018)055. https://www.osti.gov/servlets/purl/1471360.
@article{osti_1471360,
title = {From underlying event sensitive to insensitive: factorization and resummation},
author = {Kang, Daekyoung and Makris, Yiannis and Mehen, Thomas},
abstractNote = {In this study 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.},
doi = {10.1007/JHEP09(2018)055},
journal = {Journal of High Energy Physics (Online)},
number = 9,
volume = 2018,
place = {United States},
year = {Tue Sep 11 00:00:00 EDT 2018},
month = {Tue Sep 11 00:00:00 EDT 2018}
}

Journal Article:
Free Publicly Available Full Text
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Cited by: 5 works
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Figures / Tables:

Figure 1 Figure 1: The NLL-prime resumed distributions evaluated from eq. (2.35) (black dot-dashed) compared against the result from PYTHIA partonic distributions (red solid).

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Works referenced in this record:

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Works referencing / citing this record:

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Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.