Improving Higgs coupling measurements through ZZ Fusion at the ILC

Han, Tao; Liu, Zhen; Qian, Zhuoni; Sayre, Joshua

doi:10.1103/PhysRevD.91.113007

Title: Improving Higgs coupling measurements through ZZ Fusion at the ILC

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Abstract

In this study, we evaluate the e^-e⁺ → e^-e⁺ + h process through the ZZ fusion channel at the International Linear Collider operating at 500 GeV and 1 TeV center-of-mass energies. We perform realistic simulations on the signal process and background processes. With judicious kinematic cuts, we find that the inclusive cross section can be measured to 2.9% after combining the 500 GeV at 500 fb^-1 and 1 TeV at 1 ab^-1 runs. A multivariate log-likelihood analysis further improves the precision of the cross section measurement to 2.3%. We discuss the overall improvement to model-independent Higgs width and coupling determinations and demonstrate the use of different channels in distinguishing new physics effects in Higgs physics. Our study demonstrates the importance of the ZZ fusion channel to Higgs precision physics, which has often been neglected in the literature.

Authors:

Han, Tao ^[1]; Liu, Zhen ^[2]; Qian, Zhuoni ^[1]; Sayre, Joshua ^[1]

Univ. of Pittsburgh, Pittsburgh, PA (United States)
Univ. of Pittsburgh, Pittsburgh, PA (United States); Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)

Publication Date:: Wed Jun 17 00:00:00 EDT 2015

Research Org.:: Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)

Sponsoring Org.:: USDOE Office of Science (SC), High Energy Physics (HEP)

OSTI Identifier:: 1247495

Alternate Identifier(s):: OSTI ID: 1185133

Report Number(s):: arXiv:1504.01399; FERMILAB-PUB-15-101-T
Journal ID: ISSN 1550-7998; PRVDAQ; 1358228

Grant/Contract Number:: AC02-07CH11359; FG02-95ER40896

Resource Type:: Accepted Manuscript

Journal Name:: Physical Review. D, Particles, Fields, Gravitation and Cosmology

Additional Journal Information:: Journal Volume: 91; Journal Issue: 11; Journal ID: ISSN 1550-7998

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

Subject:: 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats


                    Han, Tao, Liu, Zhen, Qian, Zhuoni, and Sayre, Joshua. Improving Higgs coupling measurements through ZZ Fusion at the ILC.  United States: N. p., 2015. 
Web.  doi:10.1103/PhysRevD.91.113007.

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                    Han, Tao, Liu, Zhen, Qian, Zhuoni, & Sayre, Joshua. Improving Higgs coupling measurements through ZZ Fusion at the ILC.  United States.  https://doi.org/10.1103/PhysRevD.91.113007

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                    Han, Tao, Liu, Zhen, Qian, Zhuoni, and Sayre, Joshua. Wed .  
"Improving Higgs coupling measurements through ZZ Fusion at the ILC".  United States.  https://doi.org/10.1103/PhysRevD.91.113007.  https://www.osti.gov/servlets/purl/1247495.

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@article{osti_1247495,

  title        = {Improving Higgs coupling measurements through ZZ Fusion at the ILC},

  author       = {Han, Tao and Liu, Zhen and Qian, Zhuoni and Sayre, Joshua},

  abstractNote = {In this study, we evaluate the e-e+ → e-e+ + h process through the ZZ fusion channel at the International Linear Collider operating at 500 GeV and 1 TeV center-of-mass energies. We perform realistic simulations on the signal process and background processes. With judicious kinematic cuts, we find that the inclusive cross section can be measured to 2.9% after combining the 500 GeV at 500 fb-1 and 1 TeV at 1 ab-1 runs. A multivariate log-likelihood analysis further improves the precision of the cross section measurement to 2.3%. We discuss the overall improvement to model-independent Higgs width and coupling determinations and demonstrate the use of different channels in distinguishing new physics effects in Higgs physics. Our study demonstrates the importance of the ZZ fusion channel to Higgs precision physics, which has often been neglected in the literature.},

  doi          = {10.1103/PhysRevD.91.113007},

  journal      = {Physical Review. D, Particles, Fields, Gravitation and Cosmology},

  number       = 11,

  volume       = 91,

  place        = {United States},

  year         = {Wed Jun 17 00:00:00 EDT 2015},

  month        = {Wed Jun 17 00:00:00 EDT 2015}

}

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