The Higgs trilinear coupling provides can serve as a unique probe to investigate the structure of the Higgs sector and the nature of the electroweak phase transition, and to search for indirect signs of New Physics. Meanwhile, classical scale invariance (CSI) is an attractive idea for BSM model building, which can explain the apparent alignment of the Higgs sector and potentially relate to the...
We study the prediction of the direct CP asymmetry in the inclusive decays of B to X_s gamma and B to X_{s+d} gamma in the context of a three-Higgs-doublet model(3HDM). The 3HDM is the simplest multi-doublet model such that the charged Higgs mixing includes a physical CP phase.
We show that the CP asymmetries can be as significant as the current experimental limit. In particular, the...
We discuss a possibility that the parameter space of the two Higgs doublet model is significantly narrowed down by considering the synergy between direct searches for additional Higgs bosons at the LHC and its luminosity upgraded operation and precision measurements of the Higgs boson properties at future electron-positron colliders such as the International Linear Collider.
The talk is...
Extension of the Higgs sector is ubiquitous in physics beyond the Standard Model (BSM), and the two Higgs Doublet Model (2HDM) is one of the simplest extensions containing two scalar doublets instead of one for electroweak symmetry breaking. In the first half of the talk, I will discuss the exclusion limits on the charged Higgs parameter space, $m_{H^\pm}-\tan\beta$, using the CMS results on...
We study the scenario of the two Higgs doublet model, where the Higgs potential respects the twisted custodial symmetry at a high energy scale. In this scenario, experimental data for the Higgs boson couplings and those for the electroweak precision observables can be explained even when the masses of the extra Higgs bosons are near the electroweak scale. We also discuss the predictions on the...
While the Higgs boson with the mass of 125GeV was discovered at the LHC experiment, the shape of the Higgs sector remains unknown.
Hence, one can consider various possibilities of extended Higgs models.
The property of the discovered Higgs boson will be precisely measured in future collider experiments such as ILC.
This requires theoretical predictions for the discovered Higgs boson...
