Search For Dark Matter Produced In Association With A Leptonically Decaying Z Boson In Proton Proton Collisions At S
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Search For Dark Matter Produced In Association With A Leptonically Decaying Z Boson In Proton Proton Collisions At S
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Author : Albert M. Sirunyan
language : en
Publisher:
Release Date : 2020
Search For Dark Matter Produced In Association With A Leptonically Decaying Z Boson In Proton Proton Collisions At S written by Albert M. Sirunyan and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020 with categories.
From The Fermi Scale To Cosmology
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Author : Alberto Salvio
language : en
Publisher: Frontiers Media SA
Release Date : 2019-12-06
From The Fermi Scale To Cosmology written by Alberto Salvio and has been published by Frontiers Media SA this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-12-06 with categories.
Cern Courier
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Author :
language : en
Publisher:
Release Date : 2016
Cern Courier written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with Nuclear energy categories.
Search For Associated Production Of A Z Boson With An Invisibly Decaying Higgs Boson Or Dark Matter Candidates At Square Root S
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Author : [Study Group] ATLAS Collaboration CERN
language : en
Publisher:
Release Date : 2022
Search For Associated Production Of A Z Boson With An Invisibly Decaying Higgs Boson Or Dark Matter Candidates At Square Root S written by [Study Group] ATLAS Collaboration CERN and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022 with categories.
Abstract: A search for invisible decays of the Higgs boson as well as searches for dark matter candidates, produced together with a leptonically decaying Z boson, are presented. The analysis is performed using proton−proton collisions at a centre-of-mass energy of 13 TeV, delivered by the LHC, corresponding to an integrated luminosity of 139 and recorded by the ATLAS experiment. Assuming Standard Model cross-sections for ZH production, the observed (expected) upper limit on the branching ratio of the Higgs boson to invisible particles is found to be 19% (19%) at the 95% confidence level. Exclusion limits are also set for simplified dark matter models and two-Higgs-doublet models with an additional pseudoscalar mediator
Dissertation Abstracts International
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Author :
language : en
Publisher:
Release Date : 2006
Dissertation Abstracts International written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with Dissertations, Academic categories.
A Search For New Physics In Events With A Leptonically Decaying Z Boson And A Large Transverse Momentum Imbalance With The Cms Detector At The Lhc
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Author : Nicholas Charles Smith
language : en
Publisher:
Release Date : 2018
A Search For New Physics In Events With A Leptonically Decaying Z Boson And A Large Transverse Momentum Imbalance With The Cms Detector At The Lhc written by Nicholas Charles Smith and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018 with categories.
A search for new physics in events with a leptonically decaying Z boson and a large transverse momentum imbalance in proton-proton collisions collected at sqrt(s) = 13 TeV in 2016 with the Compact Muon Solenoid detector at the Large Hadron Collider is presented. The results of this search are interpreted in terms of a simplified model of dark matter production via spin-0 or spin-1 mediators, a scenario with a standard-model-like Higgs boson produced in association with the Z boson and decaying invisibly, a model of unparticle production, and a model with large extra spatial dimensions. No significant deviations from the background expectations are found, and limits are set on relevant model parameters, significantly extending the results previously achieved in this channel.
Physics Briefs
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Author :
language : en
Publisher:
Release Date : 1988
Physics Briefs written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1988 with Physics categories.
Search For Associated Production Of Dark Matter With A Higgs Boson Decaying To B Bar B Or Gamma Gamma At Sqrt S
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Author :
language : en
Publisher:
Release Date : 2017
Search For Associated Production Of Dark Matter With A Higgs Boson Decaying To B Bar B Or Gamma Gamma At Sqrt S written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017 with categories.
A search for dark matter is performed using events with large missing transverse momentum and a Higgs boson decaying either to a pair of bottom quarks or to a pair of photons. The data from proton-proton collisions at a center-of-mass energy of 13 TeV, collected with the CMS detector at the LHC, correspond to an integrated luminosity of 2.3 inverse-femtobarns. Results are interpreted in the context of a Z'-two-Higgs-doublet model, where a high-mass resonance Z' decays into a pseudoscalar boson A and a CP-even scalar Higgs boson, and the A decays to a pair of dark matter particles. No significant excesses are observed over the background prediction. Combining results from the two decay channels yields exclusion limits in the signal cross section in the m[Z']-m[A] phase space. The observed data exclude, for Z' coupling strength g[Z'] = 0.8 and m[A] = 300 GeV for example, the Z' mass range of 600 to 1860 GeV. This is the first result on a search for dark matter produced in association with a Higgs boson that includes constraints on h to gamma-gamma obtained at sqrt(s) = 13 TeV.
Search For Dark Matter And Unparticles Produced In Association With A Z Boson In Proton Proton Collisions At Sqrt S
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Author :
language : en
Publisher:
Release Date : 2016
Search For Dark Matter And Unparticles Produced In Association With A Z Boson In Proton Proton Collisions At Sqrt S written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with categories.
A search for evidence of particle dark matter (DM) and unparticle production at the LHC has been performed using events containing two charged leptons, consistent with the decay of a Z boson, and large missing transverse momentum. This study is based on data collected with the CMS detector corresponding to an integrated luminosity of 19.7 inverse femtobarns of pp collisions at the LHC at a center-of-mass energy of 8 TeV. No significant excess of events is observed above the number expected from the standard model contributions. The results are interpreted in terms of 90% confidence level limits on the DM-nucleon scattering cross section, as a function of the DM particle mass, for both spin-dependent and spin-independent scenarios. Limits are set on the effective cutoff scale Lambda, and on the annihilation rate for DM particles, assuming that their branching fraction to quarks is 100%. Additionally, the most stringent 95% confidence level limits to date on the unparticle model parameters are obtained.
Search For Dark Matter And Unparticles Produced In Association With A Z Boson In Proton Proton Collisions At S
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Author : CMS Collaboration
language : en
Publisher:
Release Date : 2015
Search For Dark Matter And Unparticles Produced In Association With A Z Boson In Proton Proton Collisions At S written by CMS Collaboration and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015 with categories.