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We calculate to a few percent precision the Higgs potential in a model with supersymmetry broken by boundary conditions on an extra-dimension, compactified to a segment of length $L$, and a top quark quasi-localized on one of the two…

High Energy Physics - Phenomenology · Physics 2014-11-17 Riccardo Barbieri , Guido Marandella , Michele Papucci

We compute a unitarity bound for higgs mass using one--loop corrected s--wave partial amplitude for $Z_L Z_L \rightarrow Z_L Z_L$ scattering. We use the equivalence theorem and show that the higgs mass has to be less than $\approx 600$ GeV…

High Energy Physics - Phenomenology · Physics 2009-10-22 J. Sirkka , I. Vilja

We compute the mass of the Higgs particle in a scheme in which SUSY is broken at a large scale M_{SS} well above the electroweak scale M_{EW}. Below M_{SS} one assumes one is just left with the SM with a fine-tuned Higgs potential. Under…

High Energy Physics - Phenomenology · Physics 2015-06-12 Luis E. Ibanez , Irene Valenzuela

We investigate the limits on the higgs mass in variations of Split Supersymmetry, where the boundary value of the Higgs quartic coupling at the SUSY breaking scale ($m_s$) is allowed to deviate from its value in the minimal model of…

High Energy Physics - Phenomenology · Physics 2007-05-23 Rakhi Mahbubani

The assumption that the ratio of the Higgs self-coupling to the square of its yukawa coupling to the top is (almost) independent of the renormalization scale fixes the Higgs mass within narrow limits at m=160 GeV using only the values of…

High Energy Physics - Phenomenology · Physics 2011-01-13 J. Pasupathy

The one-Higgs-doublet standard model is necessarily incomplete because of the triviality of the scalar symmetry-breaking sector. If the Higgs mass is approximately 600 GeV or higher, there must be additional dynamics at a scale $\Lambda$…

High Energy Physics - Phenomenology · Physics 2007-05-23 R. Sekhar Chivukula , Vassillis Koulovassilopoulos

The status of the triviality bound of the Higgs mass in the Minimal Standard Model is reviewed. It is emphasized that the bound is obtained, in the scalar sector, by limiting cutoff effects on physical processes. Results from several…

High Energy Physics - Lattice · Physics 2009-10-22 Urs M. Heller

A heavy Higgs resonance is described in a representation-independent way which is valid for the whole energy range of 2 -> 2 scattering processes, including the asymptotic behavior at low and high energies. The low-energy theorems which…

High Energy Physics - Phenomenology · Physics 2016-08-25 W. Kilian , K. Riesselmann

A brief review of the role of the Higgs mechanism and the ensuing Higgs particle in the Minimal Standard Model is given. Then the property of triviality of the scalar sector in the Minimal Standard Model and the upper bound on the Higgs…

High Energy Physics - Phenomenology · Physics 2009-09-25 Urs M. Heller

A version of the Standard Model is considered, where the electroweak symmetry breaking is provided by cosmological initial data given for the zeroth Fourier harmonic of the Higgs field $<\phi>$. The initial data symmetry breaking mechanism…

High Energy Physics - Phenomenology · Physics 2008-01-14 A. B. Arbuzov , L. A. Glinka , V. N. Pervushin

In certain five dimensional gauge theories the Standard Model Higgs doublet is identified, after compactification on the orbifold S^1/Z_2, with the zero mode of the fifth component of the gauge field. An effective potential for the Higgs…

High Energy Physics - Phenomenology · Physics 2008-11-26 Ilia Gogoladze , Nobuchika Okada , Qaisar Shafi

LHC has found hints for a Higgs particle of 125 GeV. We investigate the possibility that such a particle is a mixture of scalar and pseudoscalar states. For definiteness, we concentrate on a two Higgs doublet model with explicit CP…

High Energy Physics - Phenomenology · Physics 2013-05-30 A. Barroso , P. M. Ferreira , Rui Santos , João P. Silva

Plausible interrelations between parameters of the standard model are studied. The empirical value of the top quark mass, when used in the renormalization group equations, suggests that the ratio of the colour SU(3) gauge coupling $g_3$,…

High Energy Physics - Phenomenology · Physics 2007-05-23 B. Ananthanarayan , J. Pasupathy

It is widely believed that, for a given Top mass, the Higgs mass has a lower bound: if m_Higgs is too small, the Higgs vacuum is unstable due to Top dynamics. From vacuum instability, the state-of-the-art calculation of the lower bound is…

High Energy Physics - Lattice · Physics 2009-11-10 K. Holland , J. Kuti

We examine the effects of new physics effecting the Higgs sector of the standard model, focusing on the effects on the Higgs self couplings. We demonstrate that a low mass higgs, m_h < 2 m_t, can have a strong effective self coupling due to…

High Energy Physics - Phenomenology · Physics 2008-11-26 Benjamin Grinstein , Michael Trott

We use the results of Maher {\em et al.\/} (preceding paper) to construct the matrix of $j=0$ partial-wave two-body and $2\rightarrow3$ scattering amplitudes for the scattering of longitudinally polarized gauge bosons $W_L^\pm$, $Z_L$ and…

High Energy Physics - Phenomenology · Physics 2009-10-22 Loyal Durand , Peter N. Maher , Kurt Riesselmann

We further elaborate on the triviality and spontaneous symmetry breaking scenario where the Higgs boson without self-interaction coexists with spontaneous symmetry breaking. The trivial Higgs boson is rather heavy with mass m_H = 754 +/- 20…

High Energy Physics - Phenomenology · Physics 2011-06-22 P. Cea , L. Cosmai

We discuss the triviality and spontaneous symmetry breaking scenario where the Higgs boson without self-interaction coexists with spontaneous symmetry breaking. We argue that non perturbative lattice investigations support this scenario.…

High Energy Physics - Phenomenology · Physics 2011-11-10 Paolo Cea , Leonardo Cosmai

We study the Higgs-Higgs scattering process and the possible emergence of a Higgs-Higgs bound state (Higgsonium) in any Higgs potential with the vacuum expectation value and second derivative matching the corresponding values from the…

High Energy Physics - Phenomenology · Physics 2023-08-14 Vanamali Shastry , Francesco Giacosa

A brief overview of Higgs physics and of supersymmetry is given. The central theme of the overview is to explore the implications of the recent discovery of a Higgs like particle regarding the prospects for the discovery of supersymmetry…

High Energy Physics - Phenomenology · Physics 2015-06-11 Pran Nath
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