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Title: Learning physics at future $e^–e^+$ colliders with machine

Abstract

Information deformation and loss in jet clustering are one of the major limitations for precisely measuring hadronic events at future $e^–e^+$ colliders. Because of their dominance in data, the measurements of such events are crucial for advancing the precision frontier of Higgs and electroweak physics in the next decades. We show that this difficulty can be well-addressed by synergizing the event-level information into the data analysis, with the techniques of deep neutral network. In relation to this, we introduce a CMB-like observable scheme, where the event-level kinematics is encoded as Fox-Wolfram (FW) moments at leading order and multi-spectra of spherical harmonics at higher orders. Then we develop a series of jet-level (w/ and w/o the FW moments) and event-level classifiers, and analyze their sensitivity performance comparatively with two-jet and four-jet events. As an application, we analyze measuring Higgs decay width at $e^–e^+$ colliders with the data of 5ab–1@240GeV. The precision obtained is significantly better than the baseline ones presented in documents. We expect this strategy to be applied to many other hadronic- event measurements at future $e^–e^+$ colliders, and to open a new angle for evaluating their physics capability.

Authors:
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [3]; ORCiD logo [3]
  1. Hong Kong Univ. of Science and Technology, Hong Kong (China)
  2. Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States); Hong Kong Univ. of Science and Technology, Hong Kong (China)
  3. Hong Kong Univ. of Science and Technology, Hong Kong (China)
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP); Research Grants Council (RGC)
OSTI Identifier:
1656880
Report Number(s):
arXiv:2004.15013; FERMILAB-PUB-20-178-T
Journal ID: ISSN 1029-8479; oai:inspirehep.net:1793577
Grant/Contract Number:  
AC02-07CH11359; 16302117; AoE/P-404/18-3
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: 2020; Journal Issue: 10; Journal ID: ISSN 1029-8479
Publisher:
Springer Berlin
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Jets

Citation Formats

Li, Lingfeng, Li, Ying-Ying, Liu, Tao, and Xu, Si-Jun. Learning physics at future $e^–e^+$ colliders with machine. United States: N. p., 2020. Web. doi:10.1007/jhep10(2020)018.
Li, Lingfeng, Li, Ying-Ying, Liu, Tao, & Xu, Si-Jun. Learning physics at future $e^–e^+$ colliders with machine. United States. doi:10.1007/jhep10(2020)018.
Li, Lingfeng, Li, Ying-Ying, Liu, Tao, and Xu, Si-Jun. Fri . "Learning physics at future $e^–e^+$ colliders with machine". United States. doi:10.1007/jhep10(2020)018. https://www.osti.gov/servlets/purl/1656880.
@article{osti_1656880,
title = {Learning physics at future $e^–e^+$ colliders with machine},
author = {Li, Lingfeng and Li, Ying-Ying and Liu, Tao and Xu, Si-Jun},
abstractNote = {Information deformation and loss in jet clustering are one of the major limitations for precisely measuring hadronic events at future $e^–e^+$ colliders. Because of their dominance in data, the measurements of such events are crucial for advancing the precision frontier of Higgs and electroweak physics in the next decades. We show that this difficulty can be well-addressed by synergizing the event-level information into the data analysis, with the techniques of deep neutral network. In relation to this, we introduce a CMB-like observable scheme, where the event-level kinematics is encoded as Fox-Wolfram (FW) moments at leading order and multi-spectra of spherical harmonics at higher orders. Then we develop a series of jet-level (w/ and w/o the FW moments) and event-level classifiers, and analyze their sensitivity performance comparatively with two-jet and four-jet events. As an application, we analyze measuring Higgs decay width at $e^–e^+$ colliders with the data of 5ab–1@240GeV. The precision obtained is significantly better than the baseline ones presented in documents. We expect this strategy to be applied to many other hadronic- event measurements at future $e^–e^+$ colliders, and to open a new angle for evaluating their physics capability.},
doi = {10.1007/jhep10(2020)018},
journal = {Journal of High Energy Physics (Online)},
number = 10,
volume = 2020,
place = {United States},
year = {2020},
month = {10}
}

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