Beyond higgs couplings: probing the higgs with angular observables at future e+ e− colliders

Nathaniel Craig; Jiayin Gu; Zhen Liu; Kechen Wang

doi:10.1007/JHEP03(2016)050

Beyond higgs couplings: probing the higgs with angular observables at future e⁺ e⁻ colliders

Nathaniel Craig, Jiayin Gu, Zhen Liu, Kechen Wang

Research output: Contribution to journal › Article › peer-review

39 Scopus citations

Abstract

Abstract: We study angular observables in the (Formula presented.) channel at future circular e⁺e⁻ colliders such as CEPC and FCC-ee. Taking into account the impact of realistic cut acceptance and detector effects, we forecast the precision of six angular asymmetries at CEPC (FCC-ee) with center-of-mass energy (Formula presented.) GeV and 5 (30) ab⁻¹ integrated luminosity. We then determine the projected sensitivity to a range of operators relevant for he Higgs-strahlung process in the dimension-6 Higgs EFT. Our results show that angular observables provide complementary sensitivity to rate measurements when constraining various tensor structures arising from new physics. We further find that angular asymmetries provide a novel means of both probing BSM corrections to the HZγ coupling and constraining the “blind spot” in indirect limits on supersymmetric scalar top partners.

Original language	English (US)
Article number	50
Journal	Journal of High Energy Physics
Volume	2016
Issue number	3
DOIs	https://doi.org/10.1007/JHEP03(2016)050
State	Published - Mar 1 2016
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2016, The Author(s).

Keywords

Beyond Standard Model
Effective field theories
Higgs Physics

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10.1007/JHEP03(2016)050

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Cite this

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AB - Abstract: We study angular observables in the (Formula presented.) channel at future circular e+e− colliders such as CEPC and FCC-ee. Taking into account the impact of realistic cut acceptance and detector effects, we forecast the precision of six angular asymmetries at CEPC (FCC-ee) with center-of-mass energy (Formula presented.) GeV and 5 (30) ab−1 integrated luminosity. We then determine the projected sensitivity to a range of operators relevant for he Higgs-strahlung process in the dimension-6 Higgs EFT. Our results show that angular observables provide complementary sensitivity to rate measurements when constraining various tensor structures arising from new physics. We further find that angular asymmetries provide a novel means of both probing BSM corrections to the HZγ coupling and constraining the “blind spot” in indirect limits on supersymmetric scalar top partners.

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