Fingerprinting the contribution of colored scalars to the <mml:msup>H+</mml:msup><mml:msup>W-</mml:msup>Z(γ) vertex

被引：0
|
作者：
Chakrabarty, Nabarun [1 ,2 ]
Chakraborty, Indrani [3 ]
Ghosh, Dilip Kumar [4 ]
机构：
[1] Indian Inst Sci, Ctr High Energy Phys, CV Raman Ave, Bangalore 560012, Karnataka, India
[2] Natl Ctr Theoret Sci, Phys Div, Hsinchu 30013, Taiwan
[3] Indian Inst Technol Kanpur, Dept Phys, Kanpur 208016, Uttar Pradesh, India
[4] Indian Assoc Cultivat Sci, Sch Phys Sci, 2A&2B,Raja SC Mullick Rd, Kolkata 700032, India
来源：
EUROPEAN PHYSICAL JOURNAL C | 2020年 / 80卷 / 12期
关键词：
CHARGED HIGGS BOSONS; UNITARITY; TRIPLETS; DECAYS; MASSES; BOUNDS;
D O I：
10.1140/epjc/s10052-020-08676-3
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：
Color-octet scalars arise in various Grand Unification scenarios and also in other models of new physics. They are also postulated for minimal flavour violation. Purely phenomenological imprints of such scalars are therefore worth looking at. Motivated by this, we perform a complete one-loop calculation of the H+-> W+Z(gamma) decay in a two Higgs doublet model augmented by a color-octet SU(2)L scalar doublet. The computation is conveniently segregated into colorless and colored components. The color-octet part of the amplitude, being scaled by the color-factor, provides an overall enhancement to the form factors. Crucial constraints from perturbative unitarity, positivity of the scalar potential, oblique parameters, Higgs signal strengths and direct search of a charged Higgs and color-octet scalars are folded-in into the analysis. Sensitivity of the loop-induced H+-> W+Z(gamma) vertex to other model parameters is elucidated. Finally, the prospect of observing a loop-induced H+-> W+Z(gamma) interaction at the future hadronic collisions is also discussed.
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页数：27
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