Extracting a short distance top mass with light grooming
Abstract
We propose a kinematic method based on a factorization formula for precisely measuring the top quark mass mt in pp collisions using boosted top jets with light soft drop grooming. By using light grooming, which is an order of magnitude less aggressive than typical grooming, we retain a universal description of the top-mass scheme and decay effects, while still effectively removing soft contamination from the top jet. We give field theory results for the hadronization corrections for jets induced by a heavy top quark, showing they are described by a universal hadronic parameter that also appears for groomed light quark jets. An important phenomenological application of our results is that one can obtain mt in a short distance scheme by fitting the hadron level jet mass distributions, predicted by our factorization formula, to data or by Monte Carlo calibration. The peaked distributions for pp and e+e- collisions are similar, up to sensitivity to an underlying event which is significantly reduced by the soft drop. Since the soft drop implies that the t and t¯ jet masses each can be independently measured, the analysis enables the use of lepton+jet samples.
- Authors:
- Publication Date:
- Research Org.:
- Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Nuclear Physics (NP); Simons Foundation
- OSTI Identifier:
- 1571311
- Alternate Identifier(s):
- OSTI ID: 1635375
- Grant/Contract Number:
- SC0011090; 327942
- Resource Type:
- Published Article
- Journal Name:
- Physical Review D
- Additional Journal Information:
- Journal Name: Physical Review D Journal Volume: 100 Journal Issue: 7; Journal ID: ISSN 2470-0010
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; particle decays; particle production; quantum chromodynamics; quantum field theory; quark & gluon jets; resummation methods; strong interaction
Citation Formats
Hoang, André H., Mantry, Sonny, Pathak, Aditya, and Stewart, Iain W.. Extracting a short distance top mass with light grooming. United States: N. p., 2019.
Web. doi:10.1103/PhysRevD.100.074021.
Hoang, André H., Mantry, Sonny, Pathak, Aditya, & Stewart, Iain W.. Extracting a short distance top mass with light grooming. United States. https://doi.org/10.1103/PhysRevD.100.074021
Hoang, André H., Mantry, Sonny, Pathak, Aditya, and Stewart, Iain W.. Mon .
"Extracting a short distance top mass with light grooming". United States. https://doi.org/10.1103/PhysRevD.100.074021.
@article{osti_1571311,
title = {Extracting a short distance top mass with light grooming},
author = {Hoang, André H. and Mantry, Sonny and Pathak, Aditya and Stewart, Iain W.},
abstractNote = {We propose a kinematic method based on a factorization formula for precisely measuring the top quark mass mt in pp collisions using boosted top jets with light soft drop grooming. By using light grooming, which is an order of magnitude less aggressive than typical grooming, we retain a universal description of the top-mass scheme and decay effects, while still effectively removing soft contamination from the top jet. We give field theory results for the hadronization corrections for jets induced by a heavy top quark, showing they are described by a universal hadronic parameter that also appears for groomed light quark jets. An important phenomenological application of our results is that one can obtain mt in a short distance scheme by fitting the hadron level jet mass distributions, predicted by our factorization formula, to data or by Monte Carlo calibration. The peaked distributions for pp and e+e- collisions are similar, up to sensitivity to an underlying event which is significantly reduced by the soft drop. Since the soft drop implies that the t and t¯ jet masses each can be independently measured, the analysis enables the use of lepton+jet samples.},
doi = {10.1103/PhysRevD.100.074021},
journal = {Physical Review D},
number = 7,
volume = 100,
place = {United States},
year = {2019},
month = {10}
}
Free Publicly Available Full Text
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https://doi.org/10.1103/PhysRevD.100.074021
https://doi.org/10.1103/PhysRevD.100.074021
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Cited by: 15 works
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Figures / Tables:
FIG. 1: Allowed values of zcut which are strong enough to isolate the jet from contaminating radiation (above red band) but not so strong as to invalidate the factorization formulas we derive (below blue band).
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(15 total)
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Figures / Tables found in this record:
Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.