Measuring properties of a heavy Higgs boson in the H → ZZ → 4l decay

被引：2

作者：

Chang, Jung ^{[1
,2
]}

Cheung, Kingman ^{[2
,3
]}

Lee, Jae Sik ^{[1
,2
,5
]}

Lu, Chih-Ting ^{[4
]}

Park, Jubin ^{[1
,2
,5
]}

机构：

[1] Chonnam Natl Univ, Dept Phys, 300 Yongbong Dong, Kwangju 500757, South Korea

[2] Natl Ctr Theoret Sci, Phys Div, Hsinchu, Taiwan

[3] Konkuk Univ, Sch Phys, Div Quantum Phases & Devices, Seoul 143701, South Korea

[4] Natl Tsing Hua Univ, Dept Phys, Hsinchu 300, Taiwan

[5] Chonnam Natl Univ, Inst Universe & Elementary Particles, 300 Yongbong Dong, Gwangju 500757, South Korea

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2017年 / 12期

基金：

新加坡国家研究基金会;

关键词：

Beyond Standard Model; Higgs Physics; PARITY; SPIN;

D O I：

10.1007/JHEP12(2017)053

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：

In many extensions of the standard model, there exist a few extra Higgs bosons. Suppose a heavy neutral Higgs boson H is discovered at the LHC, one could then investigate CP and CP (T) over tilde properties of its couplings to a pair of Z bosons through H -> ZZ -> 4l. We use the helicity-amplitude method to write down the most general form for the angular distributions of the four final-state leptons, which can cover the case of CP-even, -odd, and -mixed state for the Higgs boson. We figure out there are 9 types of angular observables and all the H couplings to Z bosons can be fully determined by exploiting them. A Higgs-boson mass of 260 GeV below the t (t) over tilde threshold is illustrated with full details. With a total of 10(3) events of H -> ZZ -> 4l, one can determine the couplings up to 12-20% uncertainties.

引用

页数：18

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