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A search is presented for a heavy pseudoscalar boson A decaying to a Z boson and a Higgs boson with mass of 125 GeV. In the final state considered, the Higgs boson decays to a bottom quark and antiquark, and the Z boson decays either into a…

High Energy Physics - Experiment · Physics 2019-07-10 CMS Collaboration

We compute an effective action for a composite Higgs boson formed by new fermions belonging to a general technicolor non-Abelian gauge theory, using a quite general expression for the fermionic self-energy that depends on a certain…

High Energy Physics - Phenomenology · Physics 2008-11-26 A. Doff , A. A. Natale , P. S. Rodrigues da Silva

The naturalness of a Higgs boson with a mass near 125 GeV is explored in a variety of weak-scale supersymmetric models. A Higgs mass of this size strongly points towards a non-minimal implementation of supersymmetry. The Minimal…

High Energy Physics - Phenomenology · Physics 2015-06-03 Lawrence J. Hall , David Pinner , Joshua T. Ruderman

In this work we find the minimal extension of the Standard Model's Higgs sector which can lead to a light Higgs boson via radiative symmetry breaking and is consistent with the phenomenological requirements for a low-energy realization of a…

High Energy Physics - Phenomenology · Physics 2017-08-15 Alexander J. Helmboldt , Pascal Humbert , Manfred Lindner , Juri Smirnov

Composite Higgs Models are often constructed including fermionic top partners with a mass around the TeV scale, with the top partners playing the role of stabilizing the Higgs potential and enforcing partial compositeness for the top quark.…

High Energy Physics - Phenomenology · Physics 2017-12-05 Alexander Belyaev , Giacomo Cacciapaglia , Haiying Cai , Gabriele Ferretti , Thomas Flacke , Alberto Parolini , Hugo Serodio

We propose a sensitive way to test the anomalous HVV couplings (V=W^\pm, Z^0) of the Higgs boson (H), which can arise from either the dimension-3 effective operator in a nonlinearly realized Higgs sector or the dimension-6 effective…

High Energy Physics - Phenomenology · Physics 2007-05-23 H. -J. He , Y. -P. Kuang , C. -P. Yuan , B. Zhang

Precision measurements of the 125 GeV Higgs resonance recently discovered at the LHC have determined that its properties are similar to the ones of the Standard Model (SM) Higgs boson. However, the current uncertainties in the determination…

High Energy Physics - Phenomenology · Physics 2017-02-20 Marcin Badziak , Carlos E. M. Wagner

The Next to Minimal Supersymmetric Standard Model (NMSSM) with a Higgs-singlet coupling {\lambda} close to unity, moderate tan {\beta} and stop masses below 1 TeV minimizes the fine tuning of the electroweak scale, making possible that the…

High Energy Physics - Phenomenology · Physics 2013-06-25 Riccardo Barbieri , Dario Buttazzo , Kristjan Kannike , Filippo Sala , Andrea Tesi

We analyze the phenomenological consequences of assuming that the 125 GeV boson measured at the LHC coincides with one of the two CP-even Higgs bosons of an effective Minimal Supersymmetric extension of the Standard Model at the electroweak…

High Energy Physics - Phenomenology · Physics 2013-08-09 S. Scopel , N. Fornengo , A. Bottino

Combination results of the recently discovered boson are presented using data samples corresponding to integrated luminosities of up to 5.1 $\invfb$ at 7 TeV and up to 12.2 $\invfb$ at 8 TeV of proton-proton collisions collected with CMS…

High Energy Physics - Experiment · Physics 2019-08-14 Mingshui Chen

The Higgs discovery has given us the Higgs-gauge sector as a new handle to search for physics beyond the Standard Model. This includes physics scenarios originally linked to massive gauge boson scattering at high energies. We investigate…

High Energy Physics - Phenomenology · Physics 2014-10-01 Johann Brehmer , Joerg Jaeckel , Tilman Plehn

Composite Higgs models can trivially satisfy precision-electroweak and flavour constraints by simply having a large spontaneous symmetry breaking scale, f > 10 TeV. This produces a 'split' spectrum, where the strong sector resonances have…

High Energy Physics - Phenomenology · Physics 2015-06-23 James Barnard , Tony Gherghetta , Tirtha Sankar Ray , Andrew Spray

We study models that interpolate between an elementary and a composite Higgs boson. Such models, arising in theories with new vector-like fermions with electro-weak quantum numbers and charged under a confining gauge interaction, are…

High Energy Physics - Phenomenology · Physics 2018-08-29 Daniele Barducci , Stefania De Curtis , Michele Redi , Andrea Tesi

A search for the standard model Higgs boson (H) decaying to b b-bar when produced in association with a weak vector boson (V) is reported for the following channels: W(mu nu)H, W(e nu)H, W(tau nu)H, Z(mu mu)H, Z(e e)H, and Z(nu nu)H. The…

High Energy Physics - Experiment · Physics 2014-02-17 CMS Collaboration

The LHC has been built to understand the dynamics at the origin of the breaking of the electroweak symmetry. Weakly coupled models with a fundamental Higgs boson have focused most of the attention of the experimental searches. We will…

High Energy Physics - Phenomenology · Physics 2015-06-04 J. R. Espinosa , C. Grojean , M. Muehlleitner

We analyze a composite Higgs model with the minimal content that allows a light Standard-Model-like Higgs boson, potentially just above the current LEP limit. The Higgs boson is a bound state made up of the top quark and a heavy vector-like…

High Energy Physics - Phenomenology · Physics 2009-10-31 Bogdan A. Dobrescu

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

We present a first estimate of the reach of future pp colliders, the 14 TeV LHC and a futuristic 100 TeV pp collider, on a vector resonance, specifically a $W^{'}$, produced via weak-boson-fusion, and decaying dominantly into $tb$. The…

High Energy Physics - Phenomenology · Physics 2015-10-08 Kirtimaan Mohan , Natascia Vignaroli

After the discovery of the Higgs-like boson by the LHC 2012 it is the most important task to check whether this new particle is the Standard Model Higgs boson or something else. In this paper, we study whether the 125 GeV boson could be the…

High Energy Physics - Phenomenology · Physics 2013-02-20 J. Reuter , M. Tonini

We show that in the Minimal Supersymmetric Standard Model, the possibility for the lightest CP-even Higgs boson to be lighter than $Z$ boson (as low as about 60 GeV) is, contrary to the usual belief, not yet excluded by LEP2 data or any…

High Energy Physics - Phenomenology · Physics 2008-11-26 Alexander Belyaev , Qing-Hong Cao , Daisuke Nomura , Kazuhiro Tobe , C. -P. Yuan