ILC Workshop on Potential Experiments (ILCX2021)

Session

F&H-1: Higgs properties & BSM particle production

27 Oct 2021, 10:00

Room #2 (Zoom Meeting ID: 823 6921 2312)

Presentation materials

Zoom Link (Room #2)

40. Searching for Charged via $e^{+}{e}^{-}\to H^{+}{H}^{-}\to \overline{b}cb\overline{c}$ at Linear colliders

Rishabh Jain (National Taiwan University)

27/10/2021, 10:00

Session H: BSM particle production

Oral presentation using Zoom

We present a search for the charged Higgs boson via $e^{+}{e}^{-}\to H^{+}{H}^{-}\to b̅cbc̅$ at the 500 GeV ILC. In a general two Higgs doublet model without $Z_2$ symmetry, extra Yukawa couplings such as ${\rho }_{tc}$ and ${\rho }_{tt}$ can drive baryogenesis, but searches at the HL-LHC may still come away empty-handed. In this report, we take $m_{(}{H}^{+})=m_H=m_A=200$ GeV with ${\rho }_{tc}={\rho }_{tt}=0.1$, and no...

111. Impact of light dark matter on Higgs physics

Yuji Omura (Kindai University)

27/10/2021, 10:20

Session F: Higgs properties

Oral presentation using Zoom

We explore a novel possibility that dark matter has a light mass below 1 GeV in a lepton portal dark matter model. There are Yukawa couplings involving dark matter, left-handed leptons and an extra scalar doublet in the model. In the light mass region, dark matter is thermally produced via its annihilation into neutrinos. In order to obtain the correct relic abundance, a neutral scalar is...

99. Electroweak Baryogenesis in Higgs aligned 2HDM and its prediction at the ILC

Yushi Mura (Osaka Univ.)

27/10/2021, 10:40

Session F: Higgs properties

Oral presentation using Zoom

The scenario of electroweak baryogenesis in the CP violating extended Higgs model has been strongly limited by current EDM experiments, hence it is difficult to generate the observed baryon density in our universe. Recently, in the CP violating Two Higgs doublet model, which has the SM like coupling of the 125GeV Higgs and the yukawa sector avoiding FCNC, it was shown that the EDM constraints...

84. Analyzing the Higgs potential in gauge-Higgs unification with a flat extra dimension

Dr Mitsuru Kakizaki (University of Toyama)

27/10/2021, 11:00

Session H: BSM particle production

Oral presentation using Zoom

We investigate the structure of the Higgs potential in gauge-Higgs unification with a flat extra dimension. As a viable gauge-Higgs unification model, we take the one where the Standard Model Higgs doublet is embedded into a higher-dimensional SU(3)w gauge multiplet and relax five-dimensional Lorentz symmetry. In this model, the deviation in the triple Higgs boson coupling from its SM...

322. Imprint of quark flavor violating SUSY in h(125) decays at ILC

Keisho HIDAKA (Tokyo Gakugei University)

27/10/2021, 11:20

Session F: Higgs properties

Oral presentation using Zoom

We study the Higgs boson decays h -> c cbar, b bbar, b sbar, photon photon and gluon gluon in the Minimal Supersymmetric Standard Model (MSSM) with general quark flavor violation (QFV), identifying the h with the Higgs boson with a mass of 125 GeV. We compute the widths of the h decays to c cbar, b bbar, b sbar (s bbar) at full one-loop level in the MSSM with QFV. For the h decays to photon...

114. Neutral and Doubly-Charged Scalars at Future Lepton Colliders

Fang Xu

Session F: Higgs properties

Oral presentation using Zoom

Many new physics scenarios beyond the Standard Model (BSM) often necessitate the existence of new neutral and/or charged scalar fields, which might couple to the SM charged leptons and thus give some BSM signals while evading all existing constraints. We show that future lepton colliders provide a clean environment to probe these BSM including some interesting lepton flavor violating (LFV)...