https://doi.org/10.1140/epjc/s10052-020-08676-3
Regular Article – Theoretical Physics
Fingerprinting the contribution of colored scalars to the 
vertex
1
Centre for High Energy Physics, Indian Institute of Science, C. V. Raman Avenue, 560012, Bangalore, India
2
Physics Division, National Center for Theoretical Sciences, 30013, Hsinchu, Taiwan, ROC
3
Department of Physics, Indian Institute of Technology Kanpur, 208016, Kanpur, Uttar Pradesh, India
4
School of Physical Sciences, Indian Association for the Cultivation of Science, 2A & 2B, Raja S.C. Mullick Road, Jadavpur, 700032, Kolkata, India
Received:
29
June
2020
Accepted:
14
November
2020
Published online:
5
December
2020
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 
decay in a two Higgs doublet model augmented by a color-octet 
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 vertex to other model parameters is elucidated. Finally, the prospect of observing a loop-induced interaction at the future hadronic collisions is also discussed.
© The Author(s) 2020
Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.
Funded by SCOAP3
