Beyond Higgs couplings: probing the Higgs with angular observables at future e+e- colliders

被引：42

作者：

Craig, Nathaniel ^{[1
]}

Gu, Jiayin ^{[2
]}

Liu, Zhen ^{[3
]}

Wang, Kechen ^{[2
]}

机构：

[1] Univ Calif Santa Barbara, Dept Phys, Santa Barbara, CA 93106 USA

[2] Chinese Acad Sci, Inst High Energy Phys, Ctr Future High Energy Phys, Beijing 100049, Peoples R China

[3] Fermilab Natl Accelerator Lab, Dept Theoret Phys, POB 500, Batavia, IL 60510 USA

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2016年 / 03期

基金：

美国能源部;

关键词：

Beyond Standard Model; Effective field theories; Higgs Physics;

D O I：

10.1007/JHEP03(2016)050

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

We study angular observables in the e(+)e(-) -> ZH -> l(+)l(-) b (b) over bar 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 root s = 240 GeV and 5 (30) ab(-1) integrated luminosity. We then determine the projected sensitivity to a range of operators relevant for the 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 HZ gamma coupling and constraining the "blind spot" in indirect limits on supersymmetric scalar top partners.

引用

页数：28

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