Improving Higgs coupling measurements through ZZ fusion at the ILC

Tao Han, Zhen Liu, Zhouni Qian, Josh Sayre

Research output: Contribution to journalArticlepeer-review

Abstract

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 500fb-1 and 1 TeV at 1ab-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.

Original languageEnglish (US)
Article number113007
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume91
Issue number11
DOIs
StatePublished - Jun 17 2015
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2015 American Physical Society.

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