In this talk, I will discuss the effect of (strongly coupled) new physics in the di-boson final states at the HL-LHC in an EFT frame work. We will focus on the operators (dimension-six and dimension-eight) which will generate the energy-growing behaviour in the di-boson processes, thus can be possible to beat LEP Z-pole precision. We also interpret the projection bounds on the mass scales in...
We investigate composite Higgs models based on $SO(5) \times U(1)$ in the framework of gauge-Higgs unification in $AdS_5$. To create a Little Hierarchy, we introduce a top partner that competes with the top quark in the generation of the Higgs potential. We also make use of the freedom to adjust the gauge couplings with UV boundary kinetic term. Our model space is still only two-dimensional...
We investigate the possibility to find an ultraviolet completion of extensions of the Standard Model where baryon number is a local symmetry. A simple theory based on SU(4)C ⊗ SU(3)L ⊗ SU(3)R where baryon number is embedded in a non-Abelian gauge symmetry is introduced. We discuss the main features of the theory and the possible implications for experiments.
It is shown that in SO(10) models, a Yukawa sector consisting of a real $10_H$, a real
$120_H$ and a complex $126_H$ of Higgs fields can provide a realistic fit to all fermion
masses and mixings, including the neutrino sector. Although the group theory of
SO(10) demands that the $10_H$ and $120_H$ be real, most constructions complexify these
fields and impose symmetries exterior to SO(10) to...
Giving up the solutions to the fine-tuning problems, we propose the non-supersymmetric flipped $SU(5)\times U(1)_X$ model based on the minimal particle content principle. To achieve gauge coupling unification, we introduce one pair of vector-like fermions, which form complete $SU(5)\times U(1)_X$ representation.
Proton lifetime is around $5\times 10^{35}$ years, neutrino masses and mixing can...
In original twin Higgs model, vacuum misalignment between electroweak and new physics scales is realized by adding explicit Z2 breaking term. Introducing additional twin Higgs could accommodate spontaneous Z2 breaking, which explains the origin of this misalignment. I will talk about scenarios on realising the vacuum misalignment in a natural two Higgs double model framework: explicit Z2...
Twin Higgs models solve the little hierarchy problem without introducing new colored particles, however they are often in tension with measurements of the radiation density at late times. I will explore viable cosmological histories for Twin Higgs models where the mixing between the SM and twin neutrinos can thermalize the two sectors below the twin QCD phase transition, significantly reducing...
Theories of neutral naturalness, where the Standard Model top partner carries no Standard Model charge, may explain the lack of new physics seen at the LHC. The Twin Higgs was the first of these theories to be introduced, but recent work has demonstrated it is only an isolated example in a large class of "orbifold Higgs" models. In this work we study an orbifold Higgs model resulting from the...
