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The trilinear Higgs coupling $\lambda_{hhh}$ is crucial for determining the structure of the Higgs potential and for probing possible effects of physics beyond the Standard Model (SM). Focusing on the Two-Higgs-Doublet Model as a concrete…

High Energy Physics - Phenomenology · Physics 2022-12-09 Henning Bahl , Johannes Braathen , Georg Weiglein

We consider the simplest and most economic version among the proposed non-minimal supersymmetric models, in which the $\mu$-parameter is promoted to a singlet superfield, whose all self-couplings are absent from the renormalizable…

High Energy Physics - Phenomenology · Physics 2009-10-31 C. Panagiotakopoulos , A. Pilaftsis

We present a twin Higgs model based on left-right symmetry with a tree level quartic. This is made possible by extending the symmetry of the model to include two Z_2 parities, each of which is sufficient to protect the Higgs from getting a…

High Energy Physics - Phenomenology · Physics 2008-11-26 Hock-Seng Goh , Christopher A. Krenke

We explore the geometrical structure of Higgs branches of quantum field theories with 8 supercharges in 3, 4, 5 and 6 dimensions. They are symplectic singularities, and as such admit a decomposition (or foliation) into so-called symplectic…

High Energy Physics - Theory · Physics 2020-02-19 Antoine Bourget , Santiago Cabrera , Julius F. Grimminger , Amihay Hanany , Marcus Sperling , Anton Zajac , Zhenghao Zhong

The Hadrosymmetric Twin Higgs (HTH) model provides a natural solution to the little hierarchy problem by incorporating all three generations of quarks in a twin sector. Unlike other Twin Higgs scenarios, such as the Mirror Twin Higgs (MTH),…

Cosmology and Nongalactic Astrophysics · Physics 2025-10-02 Mohammad Soroori Sotudeh , Zahra Davari , Sara Khatibi , Nima Khosravi

I review the ideas of holographic space-time (HST), Cosmological SUSY breaking (CSB), and the Pyramid Schemes, which are the only known models of Tera-scale physics consistent with CSB, current particle data, and gauge coupling unification.…

High Energy Physics - Phenomenology · Physics 2015-06-18 T. Banks

Supersymmetric Gauge-Higgs Unification is a well-motivated new physics scenario, both in heterotic model building and from the perspective of higher-dimensional Grand Unified Theories. When combined with radion mediated supersymmetry…

High Energy Physics - Phenomenology · Physics 2010-01-15 Felix Brummer , Sylvain Fichet , Arthur Hebecker , Sabine Kraml

I present a concise review of the Higgs problem which plays a central role in particle physics today. The Higgs of the minimal Standard Model is so far just a conjecture that needs to be verified or discarded at the LHC. Probably the…

High Energy Physics - Phenomenology · Physics 2015-05-18 Guido Altarelli

We present a combined analysis of LHC Higgs data (signal strengths) together with LEP-2 WW production measurements. To characterize possible deviations from the Standard Model (SM) predictions, we employ the framework of an Effective Field…

High Energy Physics - Phenomenology · Physics 2016-01-13 Adam Falkowski , Martin Gonzalez-Alonso , Admir Greljo , David Marzocca

We present a general formalism based on the framework of non-commutative geometry, suitable to the study the standard model of electroweak interactions, as well as that of more general gauge theories. Left- and right-handed chiral fields…

High Energy Physics - Phenomenology · Physics 2009-11-11 Cosmin Macesanu , Kameshwar C. Wali

To gain a comprehensive view of what the LHC tells us about physics beyond the Standard Model (BSM), it is crucial that different BSM-sensitive analyses can be combined. But in general, search analyses are not statistically orthogonal, so…

High Energy Physics - Phenomenology · Physics 2023-04-19 Jack Y. Araz , Andy Buckley , Benjamin Fuks , Humberto Reyes-Gonzalez , Wolfgang Waltenberger , Sophie L. Williamson , Jamie Yellen

In this article we extend the effective field theory framework describing new physics effects to the case where the underlying low-energy theory is a Two-Higgs-Doublet model. We derive a complete set of independent operators up to dimension…

High Energy Physics - Phenomenology · Physics 2020-03-31 Andreas Crivellin , Margherita Ghezzi , Massimiliano Procura

The spin-charge-family theory offers a possible explanation for the assumptions of the standard model, interpreting the standard model as its low energy effective manifestation. The theory predicts several scalar fields determining masses…

High Energy Physics - Phenomenology · Physics 2013-01-23 Norma Susana Mankoc Borstnik

In non-minimal Higgs mechanisms, one often needs to minimize highly symmetric Higgs potentials. Here we propose a geometric way of doing it, which, surprisingly, is often much more efficient than the usual method. By construction, it gives…

High Energy Physics - Phenomenology · Physics 2015-06-12 Audrey Degee , Igor P. Ivanov , Venus Keus

The spontaneous symmetry breaking for the massless scalar field naturally arises from the framework of the effective theory (the non-minimal coupling of gravity to a scalar field). A magic key ingredient is to add the large vacuum energy…

High Energy Physics - Phenomenology · Physics 2022-04-08 Suppanat Supanyo , Monsit Tanasittikosol , Sikarin Yoo-Kong , Lunchakorn Tannukij

We present a supersymmetric extension of the Standard Model in which only one electroweak doublet acquires a vacuum expectation value and gives mass to Standard Model fermions. As well as the novel accommodation of a Standard Model Higgs…

High Energy Physics - Phenomenology · Physics 2011-04-28 Rhys Davies , John March-Russell , Matthew McCullough

Type-Z models, where charged leptons, up type quarks, and down type quarks each couple to a different scalar, are only possible when there are three or more Higgs doublets. We consider the Type-Z three Higgs doublet model imposed by a…

High Energy Physics - Phenomenology · Physics 2021-11-24 Rafael Boto , Jorge C. Romão , João P. Silva

Many theories require augmenting the Standard Model with additional scalar fields with large order one couplings. We present a new solution to the hierarchy problem for these scalar fields. We explore parity- and $\mathbb{Z}_2$-symmetric…

High Energy Physics - Phenomenology · Physics 2016-07-01 Nikita Blinov , Anson Hook

The quartic and trilinear Higgs field couplings to an additional real scalar are renormalizable, gauge and Lorentz invariant. Thus, on general grounds, one expects such couplings between the Higgs and an inflaton in quantum field theory. In…

High Energy Physics - Phenomenology · Physics 2018-12-26 Yohei Ema , Mindaugas Karciauskas , Oleg Lebedev , Stanislav Rusak , Marco Zatta

The scalar sector of the Standard Model is extended to include an arbitrary assortment of scalars. In the case where this assignment does not preserve $\rho=1$ at the tree-level, the departure from unity itself puts the most stringent…

High Energy Physics - Phenomenology · Physics 2009-10-28 Debrupa Chakraverty , Anirban Kundu