scholarly journals PROSPECTS FOR HIGGS BOSON SEARCHES AT THE LHC

2008 ◽  
Vol 23 (32) ◽  
pp. 5093-5115 ◽  
Author(s):  
KARL JAKOBS ◽  
MARKUS SCHUMACHER
Keyword(s):  
Higgs Boson ◽  
Large Hadron Collider ◽  
Symmetry Breaking ◽  
Hadron Collider ◽  
Mass Range ◽  
Electroweak Symmetry Breaking ◽  
Higgs Bosons ◽  
Standard Model Higgs Boson ◽  
Electroweak Symmetry ◽  
Cern Large Hadron Collider

The investigation of the dynamics responsible for electroweak symmetry breaking is one of the prime tasks of experiments at the CERN Large Hadron Collider (LHC). The experiments ATLAS and CMS have been designed to be able to discover a Standard Model Higgs boson over the full mass range as well as Higgs bosons in extended models. In this paper, the prospects for Higgs boson searches at the LHC are reviewed. In addition, the potential for the measurement of Higgs boson parameters is discussed.

scholarly journals VARIOUS MODELS MIMICKING THE SM HIGGS BOSON

2012 ◽  
Vol 27 (28) ◽  
pp. 1230030 ◽  
Author(s):  
JUNG CHANG ◽  
KINGMAN CHEUNG ◽  
PO-YAN TSENG ◽  
TZU-CHIANG YUAN
Keyword(s):  
Higgs Boson ◽  
Large Hadron Collider ◽  
Symmetry Breaking ◽  
Vector Boson ◽  
Hadron Collider ◽  
Gluon Fusion ◽  
Electroweak Symmetry Breaking ◽  
Electroweak Symmetry ◽  
Production Mechanism ◽  
The Standard Model

The new particle around 125 GeV observed at the Large Hadron Collider (LHC) is almost consistent with the standard model (SM) Higgs boson, except that the diphoton decay mode may be excessive. We summarize a number of possibilities. While at the LHC the dominant production mechanism for the Higgs boson of SM and some other extensions is via the gluon fusion process, the alternative vector-boson fusion (VBF) is more sensitive to electroweak symmetry breaking. Using the well-known dijet-tagging technique to single out the VBF mechanism, we investigate potential of VBF to discriminate a number of models suggested to give an enhanced inclusive diphoton production rate.

THE ONE-PARAMETER MODEL AT LHC

2011 ◽  
Vol 26 (02) ◽  
pp. 87-100
Author(s):  
JAMES MAXIN ◽  
VAN E. MAYES ◽  
D. V. NANOPOULOS
Keyword(s):  
Large Hadron Collider ◽  
Symmetry Breaking ◽  
Hadron Collider ◽  
Susy Breaking ◽  
Electroweak Symmetry Breaking ◽  
Electroweak Symmetry ◽  
Brane Model ◽  
String Compactifications ◽  
The One ◽  
Breaking Scale

No-scale supergravity is a framework where it is possible to naturally explain radiative electroweak symmetry breaking and correlate it with the effective SUSY breaking scale. Many string compactifications have a classical no-scale structure, resulting in a one-parameter model (OPM) for the supersymmetry breaking soft terms, which results in a highly constrained subset of mSUGRA. We investigate the allowed supersymmetry parameter space for a generic one-parameter model taking into account the most recent experimental constraints. We also survey the possible signatures which may be observable at the Large Hadron Collider (LHC). Finally, we compare collider signatures of OPM to those from a model with non-universal soft terms, in particular those of an intersecting D6-brane model.

scholarly journals ELECTROWEAK SYMMETRY BREAKING AND THE HIGGS BOSON: CONFRONTING THEORIES AT COLLIDERS

2013 ◽  
Vol 28 (02) ◽  
pp. 1330004 ◽  
Author(s):  
ALEKSANDR AZATOV ◽  
JAMISON GALLOWAY
Keyword(s):  
Higgs Boson ◽  
Symmetry Breaking ◽  
Model Building ◽  
Hadron Collider ◽  
Experimental Tests ◽  
New Physics ◽  
Electroweak Symmetry Breaking ◽  
Electroweak Symmetry ◽  
Parameter Spaces ◽  
Decay Modes

In this review, we discuss methods of parsing direct information from collider experiments regarding the Higgs boson and describe simple ways in which experimental likelihoods can be consistently reconstructed and interfaced with model predictions in pertinent parameter spaces. We review prevalent scenarios for extending the electroweak symmetry breaking sector and emphasize their predictions for nonstandard Higgs phenomenology that could be observed in large hadron collider (LHC) data if naturalness is realized in particular ways. Specifically we identify how measurements of Higgs couplings can be used to imply the existence of new physics at particular scales within various contexts. The most dominant production and decay modes of the Higgs-like state observed in the early data sets have proven to be consistent with predictions of the Higgs boson of the Standard Model, though interesting directions in subdominant channels still exist and will require our careful attention in further experimental tests. Slightly anomalous rates in certain channels at the early LHC have spurred effort in model building and spectra analyses of particular theories, and we discuss these developments in some detail. Finally, we highlight some parameter spaces of interest in order to give examples of how the data surrounding the new state can most effectively be used to constrain specific models of weak scale physics.

SEARCH FOR THE STANDARD MODEL HIGGS BOSON WITH THE ATLAS DETECTOR

2013 ◽  
Vol 22 (07) ◽  
pp. 1330015
Author(s):  
◽  
DOMIZIA ORESTANO
Keyword(s):  
Higgs Boson ◽  
Large Hadron Collider ◽  
Standard Model ◽  
Particle Physics ◽  
Hadron Collider ◽  
Atlas Detector ◽  
Standard Model Higgs Boson ◽  
Cern Large Hadron Collider ◽  
Atlas Experiment ◽  
The Standard Model

This document presents a brief overview of some of the experimental techniques employed by the ATLAS experiment at the CERN Large Hadron Collider (LHC) in the search for the Higgs boson predicted by the standard model (SM) of particle physics. The data and the statistical analyses that allowed in July 2012, only few days before this presentation at the Marcel Grossman Meeting, to firmly establish the observation of a new particle are described. The additional studies needed to check the consistency between the newly discovered particle and the Higgs boson are also discussed.

The Higgs Boson

2019 ◽  
pp. 327-342
Author(s):  
Michael E. Peskin
Keyword(s):  
Higgs Boson ◽  
Large Hadron Collider ◽  
Standard Model ◽  
Symmetry Breaking ◽  
Spontaneous Symmetry Breaking ◽  
Hadron Collider ◽  
Higgs Bosons ◽  
The Standard Model

This chapter discusses the Higgs boson, the spin-0 particle in the Standard Model most closely associated with its spontaneous symmetry breaking. It gives the predictions of the Standard Model for the production and decay of Higgs bosons. It describes the experiments at the Large Hadron Collider that test these predictions.

scholarly journals LANDSCAPE IMPLICATIONS OF EXTENDED HIGGS MODELS

2008 ◽  
Vol 23 (22) ◽  
pp. 3509-3523 ◽  
Author(s):  
L. CLAVELLI
Keyword(s):  
Phase Transition ◽  
Large Hadron Collider ◽  
Standard Model ◽  
Symmetry Breaking ◽  
Hadron Collider ◽  
Higgs Sector ◽  
Electroweak Symmetry Breaking ◽  
Electroweak Symmetry ◽  
Degenerate Electron ◽  
Points Of View

From several points of view, it is strongly suggested that the current universe is unstable and will ultimately decay to one that is exactly supersymmetric (SUSY). The possibility that atoms and molecules form in this future universe requires that the degenerate electron/selectron mass is non-zero and hence that electroweak symmetry breaking (EWSB) survives the phase transition to exact SUSY. However, the Minimal Supersymmetric Standard Model (MSSM) and several of its extensions have no EWSB in the SUSY limit. Among the extended Higgs models that have been discussed, one stands out in this regard. The Higgs sector that is revealed at the Large Hadron Collider (LHC) will therefore have implications for the future universe. We also address the question as to whether the transition to the exact SUSY phase with EWSB is exothermic.

scholarly journals Relativistic freeze-in with scalar dark matter in a gauged B − L model and electroweak symmetry breaking

2021 ◽  
Vol 2021 (5) ◽  
Author(s):  
Priyotosh Bandyopadhyay ◽  
Manimala Mitra ◽  
Abhishek Roy
Keyword(s):  
Dark Matter ◽  
Higgs Boson ◽  
Symmetry Breaking ◽  
Electroweak Symmetry Breaking ◽  
Higgs Bosons ◽  
Thermal Mass ◽  
Electroweak Symmetry ◽  
Mass Correction ◽  
Dark Matter Relic Density ◽  
Bose Einstein

Abstract We explore relativistic freeze-in production of scalar dark matter in gauged B − L model, where we focus on the production of dark matter from the decay and annihilation of Standard Model (SM) and B − L Higgs bosons. We consider the Bose-Einstein (BE) and Fermi-Dirac (FD) statistics, along with the thermal mass correction of the SM Higgs boson in our analysis. We show that in addition to the SM Higgs boson, the annihilation and decay of the B − L scalar can also contribute substantially to the dark matter relic density. Potential effects of electroweak symmetry breaking (EWSB) and thermal mass correction in BE framework enhance the dark matter relic substantially as it freezes-in near EWSB temperature via scalar annihilation. However, such effects are not so prominent when the dark matter freezes-in at a later epoch than EWSB, dominantly by decay of scalars. The results of this analysis are rather generic, and applicable to other similar scenarios.

scholarly journals HIGGS BOSON SEARCHES AT HADRON COLLIDERS

2005 ◽  
Vol 20 (12) ◽  
pp. 2523-2602 ◽  
Author(s):  
VOLKER BÜSCHER ◽  
KARL JAKOBS
Keyword(s):  
Higgs Boson ◽  
Standard Model ◽  
Vector Boson ◽  
Hadron Collider ◽  
Mass Range ◽  
Higgs Bosons ◽  
Standard Model Higgs Boson ◽  
Detector Performance ◽  
Discovery Potential ◽  
Fusion Mode

The investigation of the dynamics responsible for electroweak symmetry breaking is one of the prime tasks of experiments at present and future colliders. Experiments at the Tevatron [Formula: see text] Collider and at the CERN Large Hadron Collider (LHC) must be able to discover a Standard Model Higgs boson over the full mass range as well as Higgs bosons in extended models. In this review, the discovery potential for the Standard Model Higgs boson and for Higgs bosons in the Minimal Supersymmetric extension is summarized. Emphasis is put on those studies which have been performed recently within the experimental collaborations using a realistic simulation of the detector performance. This includes a discussion of the search for Higgs bosons using the vector boson fusion mode at the LHC, a discussion of the measurement of Higgs boson parameters as well as a detailed review of the MSSM sector for different benchmark scenarios. The Tevatron part of the review also contains a discussion of first physics results from data taken in the ongoing Run II.

Sign in / Sign up

Export Citation Format

Share Document