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Title: Searches for BSM and Higgs boson at LHC

Abstract

This article reviews the recent results from the two energy frontier experiments, ATLAS and CMS at the large hadron collider (LHC), using the data collected during 2011 corresponding up to 4.9 fb{sup -1} integrated luminosity of {radical}(s) = 7TeV proton proton collisions. The recent results of searches for the Standard Model Higgs boson, and searches for beyond Standard Model physics based on supersymmetry and other new exotic models are presented.

Authors:
 [1]; ;
  1. Tokyo Institute of Technology, Department of Physics, Graduate School of Science and Engineering (Japan)
Publication Date:
OSTI Identifier:
22069137
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1467; Journal Issue: 1; Conference: GUT2012: International workshop on grand unified theories, Kyoto (Japan), 15-17 Mar 2012; Other Information: (c) 2012 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; CERN LHC; HIGGS BOSONS; MULTIPARTICLE SPECTROMETERS; PARTICLE IDENTIFICATION; PARTICLE PRODUCTION; PROTON-PROTON INTERACTIONS; REVIEWS; STANDARD MODEL; SUPERSYMMETRY

Citation Formats

Jinnouchi, O., Collaboration: ATLAS Collaboration, and CMS Collaboration. Searches for BSM and Higgs boson at LHC. United States: N. p., 2012. Web. doi:10.1063/1.4742082.
Jinnouchi, O., Collaboration: ATLAS Collaboration, & CMS Collaboration. Searches for BSM and Higgs boson at LHC. United States. doi:10.1063/1.4742082.
Jinnouchi, O., Collaboration: ATLAS Collaboration, and CMS Collaboration. Fri . "Searches for BSM and Higgs boson at LHC". United States. doi:10.1063/1.4742082.
@article{osti_22069137,
title = {Searches for BSM and Higgs boson at LHC},
author = {Jinnouchi, O. and Collaboration: ATLAS Collaboration and CMS Collaboration},
abstractNote = {This article reviews the recent results from the two energy frontier experiments, ATLAS and CMS at the large hadron collider (LHC), using the data collected during 2011 corresponding up to 4.9 fb{sup -1} integrated luminosity of {radical}(s) = 7TeV proton proton collisions. The recent results of searches for the Standard Model Higgs boson, and searches for beyond Standard Model physics based on supersymmetry and other new exotic models are presented.},
doi = {10.1063/1.4742082},
journal = {AIP Conference Proceedings},
number = 1,
volume = 1467,
place = {United States},
year = {Fri Jul 27 00:00:00 EDT 2012},
month = {Fri Jul 27 00:00:00 EDT 2012}
}
  • A Higgs-like particle with a mass of about 125.5 GeV has been discovered at the LHC. Within the current experimental uncertainties, this new state is compatible with both the predictions for the Standard Model (SM) Higgs boson and with the Higgs sector in the Minimal Supersymmetric Standard Model (MSSM). We propose new low-energy MSSM benchmark scenarios that, over a wide parameter range, are compatible with the mass and production rates of the observed signal. These scenarios also exhibit interesting phenomenology for the MSSM Higgs sector. We propose a slightly updated version of the well-known mh-max scenario, and a modified scenariomore » (mh-mod), where the light CP-even Higgs boson can be interpreted as the LHC signal in large parts of the MA-tan \beta\ plane. Furthermore, we define a light stop scenario that leads to a suppression of the lightest CP-even Higgs gluon fusion rate, and a light stau scenario with an enhanced decay rate of h to \gamma\gamma\ at large tan \beta. We also suggest a \tau-phobic Higgs scenario in which the lightest Higgs can have suppressed couplings to down-type fermions. We propose to supplement the specified value of the \mu\ parameter in some of these scenarios with additional values of both signs. This has a significant impact on the interpretation of searches for the non SM-like MSSM Higgs bosons. We also discuss the sensitivity of the searches to heavy Higgs decays into light charginos and neutralinos, and to decays of the form H to hh. Finally, in addition to all the other scenarios where the lightest CP-even Higgs is interpreted as the LHC signal, we propose a low-MH scenario, where instead the heavy CP-even Higgs boson corresponds to the new state around 125.5 GeV.« less
  • The Higgs boson search has shifted from LEP2 to the Tevatron and will subsequently move to the LHC. The current limits from the Tevatron and the prospective sensitivities at the LHC are often interpreted in specific MSSM scenarios. For heavy Higgs boson production and subsequent decay into b{bar b} or {tau}{sup +}{tau}{sup -}, the present Tevatron data allow to set limits in the M{sub A}-tan {beta} plane for small M{sub A} and large tan {beta} values. Similar channels have been explored for the LHC, where the discovery reach extends to higher values of M{sub A} and smaller tan {beta}. Searchesmore » for MSSM charged Higgs bosons, produced in top decays or in association with top quarks, have also been investigated at the Tevatron and the LHC. We analyze the current Tevatron limits and prospective LHC sensitivities. We discuss how robust they are with respect to variations of the other MSSM parameters and possible improvements of the theoretical predictions for Higgs boson production and decay. It is shown that the inclusion of supersymmetric radiative corrections to the production cross sections and decay widths leads to important modifications of the present limits on the MSSM parameter space. The impact on the region where only the lightest MSSM Higgs boson can be detected at the LHC is also analyzed. We propose to extend the existing benchmark scenarios by including additional values of the higgsino mass parameter {mu}. This affects only slightly the search channels for a SM-like Higgs boson, while having a major impact on the searches for non-standard MSSM Higgs bosons.« less
  • No abstract prepared.
  • The physics potential for Higgs boson discovery with the ATLAS and CMS detectors at the LHC is discussed, in the framework of the Standard Model (SM) and its Minimal Supersymmetric extension (MSSM)