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
收藏
页数：18
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