Pseudoscalar pair production via off-shell Higgs in composite Higgs models

被引：5

作者：

Franzosi, Diogo Buarque ^{[1
]}

Ferretti, Gabriele ^{[1
]}

Huang, Li ^{[2
]}

Shu, Jing ^{[3
,4
,5
,6
,7
]}

机构：

[1] Chalmers Univ Technol, Dept Phys, S-41296 Gothenburg, Sweden

[2] Univ Kansas, Dept Phys & Astron, Lawrence, KS 66045 USA

[3] Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, Beijing 100190, Peoples R China

[4] Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100049, Peoples R China

[5] CAS Ctr Excellence Particle Phys, Beijing 100049, Peoples R China

[6] Peking Univ, Ctr High Energy Phys, Beijing 100871, Peoples R China

[7] Univ Chinese Acad Sci, Sch Fundamental Phys & Math Sci, Hangzhou Inst Adv Study, Hangzhou 310024, Peoples R China

来源：

SCIPOST PHYSICS | 2020年 / 9卷 / 05期

基金：

中国国家自然科学基金; 美国能源部;

关键词：

FINAL-STATE; LIGHT PSEUDOSCALARS; PP COLLISIONS; ROOT-S=13 TEV; EXOTIC DECAY; SYMMETRY; SEARCH; BOSON; BREAKING;

D O I：

10.21468/SciPostPhys.9.5.077

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We propose a new type of search for a pseudoscalar particle eta pair produced via an off-shell Higgs, pp -> h* -> eta eta. The search is motivated by a composite Higgs model in which the eta is extremely narrow and decays almost exclusively into Z(gamma) in the mass range 65 GeV less than or similar to m(eta) less than or similar to 160 GeV. We devise an analysis strategy to observe the novel Z(gamma)Z(gamma) channel and estimate potential bounds on the Higgs-eta coupling. The experimental sensitivity to the signatures depends on the power to identify fake photons and on the ability to predict large photon multiplicities. This search allows us to exclude large values of the compositeness scale f, being thus complementary to other typical processes.

引用

页数：22