scholarly journals Likelihood analysis of the constrained minimal supersymmetric standard model parameter space

2004 ◽  
Vol 69 (9) ◽  
Author(s):  
John Ellis ◽  
Keith A. Olive ◽  
Yudi Santoso ◽  
Vassilis C. Spanos
Keyword(s):  
Standard Model ◽  
Supersymmetric Standard Model ◽  
Minimal Supersymmetric Standard Model ◽  
Parameter Space ◽  
Model Parameter ◽  
Likelihood Analysis

Production at linear colliders of charginos and neutrilinos associated with Higgs and gauge bosons

2015 ◽  
Vol 93 (3) ◽  
pp. 278-282
Author(s):  
Chen Chi-Yi ◽  
Hou Hong-Sheng
Keyword(s):  
Standard Model ◽  
Supersymmetric Standard Model ◽  
Minimal Supersymmetric Standard Model ◽  
Parameter Space ◽  
Cross Sections ◽  
Gauge Bosons ◽  
Linear Colliders ◽  
The Cross

We studied the production of charginos and neutrilinos associated with Higgs and gauge bosons in the Minimal Supersymmetric Standard Model (MSSM) at linear colliders. Understanding the processes will help determine the couplings of charginos and neutralinos to Higgs and gauge bosons in the MSSM. We investigated the parameter space for values of μ between –2000 and 2000 GeV and values of M2 between 0 and 2000 GeV. We found that the cross sections of the processes reach only a few femtobarns at a e+e– colliders with [Formula: see text] GeV.

scholarly journals INFLATION AND THE MINIMAL SUPERSYMMETRIC STANDARD MODEL

2008 ◽  
Vol 23 (33) ◽  
pp. 2799-2809 ◽  
Author(s):  
ROUZBEH ALLAHVERDI
Keyword(s):  
Standard Model ◽  
Supersymmetric Standard Model ◽  
Minimal Supersymmetric Standard Model ◽  
Parameter Space ◽  
High Energy Physics ◽  
Hadron Collider ◽  
High Energy ◽  
Wilkinson Microwave Anisotropy Probe ◽  
Cosmological Data ◽  
Superluminal Expansion

There is strong evidence from cosmological data that the universe underwent an epoch of superluminal expansion called inflation. A satisfactory embedding of inflation in fundamental physics has been an outstanding problem at the interface of cosmology and high energy physics. We show how inflation can be realized within the Minimal Supersymmetric Standard Model (MSSM). The inflaton candidates are two specific combinations of supersymmetric partners of quarks and leptons. MSSM inflation occurs at a low scale and generates perturbations in the range experimentally allowed by the latest data from Wilkinson Microwave Anisotropy Probe (WMAP). The parameter space for inflation is compatible with supersymmetric dark matter, and the Large Hadron Collider (LHC) is capable of discovering the inflaton candidates in the allowed regions of parameter space.

scholarly journals The Higgs properties in the MSSM after the LHC Run-2

2018 ◽  
Vol 33 (11) ◽  
pp. 1841001
Author(s):  
Jun Zhao
Keyword(s):  
Higgs Boson ◽  
Standard Model ◽  
Supersymmetric Standard Model ◽  
Minimal Supersymmetric Standard Model ◽  
Parameter Space ◽  
Yukawa Couplings ◽  
Gauge Couplings ◽  
Precision Electroweak Data ◽  
Higgs Data

We scrutinize the parameter space of the SM-like Higgs boson in the minimal supersymmetric standard model (MSSM) under current experimental constraints. The constraints are from (i) the precision electroweak data and various flavor observables; (ii) the direct 22 separate ATLAS searches in Run-1; (iii) the latest LHC Run-2 Higgs data and tri-lepton search of electroweakinos. We perform a scan over the parameter space and find that the Run-2 data can further exclude a part of parameter space. For the property of the SM-like Higgs boson, its gauge couplings further approach to the SM values with a deviation below 0.1%, while its Yukawa couplings [Formula: see text] and [Formula: see text] can still sizably differ from the SM predictions by several tens percent.

scholarly journals MINIMAL SUPERSYMMETRIC STANDARD MODEL HIGGS RATES AND BACKGROUNDS IN ATLAS

1998 ◽  
Vol 13 (09) ◽  
pp. 1371-1494 ◽  
Author(s):  
ELŻBIETA RICHTER-WAS ◽  
DANIEL FROIDEVAUX ◽  
FABIOLA GIANOTTI ◽  
LUC POGGIOLI ◽  
DONATELLA CAVALLI ◽  
...  
Keyword(s):  
Higgs Boson ◽  
Standard Model ◽  
Supersymmetric Standard Model ◽  
Minimal Supersymmetric Standard Model ◽  
Parameter Space ◽  
Higgs Sector ◽  
Atlas Detector ◽  
Direct Impact ◽  
Detector Performance ◽  
Upper Limit

This study presents an overview of the potential of the ATLAS detector at LHC for the observation of the Higgs boson of the minimal supersymmetric Standard Model (MSSM). The expected rates, backgrounds and significances are discussed channel by channel using realistic assumptions for the detector performance. As final results, the ranges of the MSSM parameter space projected on the (mA, tan β) and (mh, tan β) planes, for which the expected significances for the discovery of the different channels exceed a 5σ value, are shown for the ATLAS detector alone and for combined results from the ATLAS and CMS detectors. It is concluded that the combined potential of the two LHC detectors should fully cover the Higgs sector of the MSSM parameter space. The sensitivity of the results to the upper limit of the allowed mass for the lightest Higgs boson is extensively discussed. The direct impact of the SUSY particle sector on such searches is neglected in this paper.

PROBING THE HIGGS SECTOR OF THE MINIMAL SUPERSYMMETRIC STANDARD MODEL AT e+e− COLLIDERS

1992 ◽  
Vol 07 (31) ◽  
pp. 2877-2888 ◽  
Author(s):  
ATSUSHI YAMADA
Keyword(s):  
Standard Model ◽  
Supersymmetric Standard Model ◽  
Minimal Supersymmetric Standard Model ◽  
Parameter Space ◽  
Cross Sections ◽  
Global Analysis ◽  
Production Cross ◽  
Higgs Sector ◽  
Branching Ratios ◽  
Higgs Bosons

The ability of future e+e− colliders to study the supersymmetric Higgs sector is examined. The effects of the radiative corrections are included. A global analysis is given for the production cross-sections of the neutral Higgs bosons over the full parameter space of the Higgs sector, which clarifies the integrated luminosity necessary for the detection of the neutral Higgs bosons. The branching ratios of the three neutral Higgs bosons are also computed.

scholarly journals Interpreting 750 GeV diphoton excess with R-parity violating supersymmetry

2017 ◽  
Vol 32 (02n03) ◽  
pp. 1750014
Author(s):  
Ran Ding ◽  
Li Huang ◽  
Tianjun Li ◽  
Bin Zhu
Keyword(s):  
Standard Model ◽  
Supersymmetric Standard Model ◽  
Minimal Supersymmetric Standard Model ◽  
Parameter Space ◽  
Parity Violation ◽  
Branching Ratio ◽  
Mass Range ◽  
Signal Rate ◽  
8 Tev ◽  
The Masses

We propose a supersymmetric explanation of the diphoton excess in the Minimal Supersymmetric Standard Model (MSSM) with the leptonic R-parity violation. In our model, sneutrino serves as the 750 GeV resonance and produced through quark–antiquark annihilation. With introducing appropriate trilinear soft parameters, we show that the diphoton branching ratio is significantly enhanced compared with the conventional MSSM. For current dijet and W-pair LHC constraints, we can successfully fit the observed diphoton signal rate in sizeable parameter regions, the resulting parameter space strongly favor the masses of light smuon and stau within the range from 375–500 GeV, which depends on the choice of electroweakino masses and soft trilinear terms. While after taking into account the compatibility of diphoton excess between the 8 TeV and 13 TeV LHC, only the coupling involved with the second generation quarks is survived. In this case, the corresponding parameter space favors a narrow mass range of smuon and stau with [Formula: see text]. Even if the 750 GeV diphoton excesses were not confirmed by the ATLAS and CMS experiments, we point out that our proposal can still be used to explain the current and future tentative diphoton excesses.

scholarly journals Measuring the trilinear neutral Higgs boson couplings in the minimal supersymmetric standard model at e+e− colliders in the light of the discovery of a Higgs boson

2016 ◽  
Vol 31 (18) ◽  
pp. 1650108 ◽  
Author(s):  
Charanjit K. Khosa ◽  
P. N. Pandita
Keyword(s):  
Higgs Boson ◽  
Standard Model ◽  
Supersymmetric Standard Model ◽  
Minimal Supersymmetric Standard Model ◽  
Parameter Space ◽  
Linear Collider ◽  
Hadron Collider ◽  
High Energy ◽  
Electron Positron ◽  
Positron Collisions

We consider the measurement of the trilinear couplings of the neutral Higgs bosons in the minimal supersymmetric standard model (MSSM) at a high energy [Formula: see text] linear collider in the light of the discovery of a Higgs boson at the CERN Large Hadron Collider (LHC). We identify the state observed at the LHC with the lightest Higgs boson [Formula: see text] of the MSSM, and impose the constraints following from this identification, as well as other experimental constraints on the MSSM parameter space. In order to measure trilinear neutral Higgs couplings, we consider different processes where the heavier Higgs boson [Formula: see text] of the MSSM is produced in electron–positron collisions, which subsequently decays into a pair of lighter Higgs boson. We identify the regions of the MSSM parameter space where it may be possible to measure the trilinear couplings of the Higgs boson at a future electron–positron collider. A measurement of the trilinear Higgs couplings is a crucial step in the construction of the Higgs potential, and hence in establishing the phenomena of spontaneous symmetry breaking in gauge theories.

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