Searches For Invisible Decays Of The Higgs Boson In Pp Collisions At Sqrt S
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Searches For Invisible Decays Of The Higgs Boson In Pp Collisions At Sqrt S
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Author :
language : en
Publisher:
Release Date : 2016
Searches For Invisible Decays Of The Higgs Boson In Pp 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.
Searches for invisible decays of the Higgs boson are presented. The data collected with the CMS detector at the LHC correspond to integrated luminosities of 5.1, 19.7, and 2.3 inverse femtobarns at centre-of-mass energies of 7, 8, and 13 TeV, respectively. The search channels target Higgs boson production via gluon fusion, vector boson fusion, and in association with a vector boson. Upper limits are placed on the branching fraction of the Higgs boson decay to invisible particles, as a function of the assumed production cross sections. The combination of all channels, assuming standard model production, yields an observed (expected) upper limit on the invisible branching fraction of 0.24 (0.23) at the 95% confidence level. The results are also interpreted in the context of Higgs-portal dark matter models.
Scientific And Technical Aerospace Reports
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Author :
language : en
Publisher:
Release Date : 1994
Scientific And Technical Aerospace Reports written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with Aeronautics categories.
Proceedings Of The 2011 Theoretical Advanced Study Institute In Elementary Particle Physics
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Author : Konstantin T. Matchev
language : en
Publisher: World Scientific
Release Date : 2012
Proceedings Of The 2011 Theoretical Advanced Study Institute In Elementary Particle Physics written by Konstantin T. Matchev and has been published by World Scientific this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with Science categories.
This volume is a compilation of the lectures at TASI 2011, held in Boulder, Colorado, June 2011. They cover topics in theoretical particle physics including the Standard Model and beyond, collider physics, dark matter, and cosmology, at a level intended to be accessible to students at the initial stages of their research careers.
Search For Invisible Decays Of The Higgs Boson Produced In Association With A Hadronically Decaying Vector Boson In Pp Collisions At Arrow
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Author :
language : en
Publisher:
Release Date : 2015
Search For Invisible Decays Of The Higgs Boson Produced In Association With A Hadronically Decaying Vector Boson In Pp Collisions At Arrow written by 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.
A search for Higgs boson decays to invisible particles is performed using 20.3 fb−1 of pp collision data at a centre-of-mass energy of 8 TeV recorded by the ATLAS detector at the Large Hadron Collider. The process considered is Higgs boson production in association with a vector boson (V = W or Z) that decays hadronically, resulting in events with two or more jets and large missing transverse momentum. No excess of candidates is observed in the data over the background expectation. The results are used to constrain V H production followed by H decaying to invisible particles for the Higgs boson mass range 115
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
A Search For Higgs Portal Dark Matter And New Phenomena With Monojet Signatures In Pp Collisions At Square Root Symbol S
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Author : James D. Pearce
language : en
Publisher:
Release Date : 2015
A Search For Higgs Portal Dark Matter And New Phenomena With Monojet Signatures In Pp Collisions At Square Root Symbol S written by James D. Pearce 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.
Search For Invisible Decays Of Higgs Bosons In The Vector Boson Fusion And Associated Zh Production Modes
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Author :
language : en
Publisher:
Release Date : 2014
Search For Invisible Decays Of Higgs Bosons In The Vector Boson Fusion And Associated Zh Production Modes written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014 with categories.
A search for invisible decays of Higgs bosons is performed using the vector boson fusion and associated ZH production modes. In the ZH mode, the Z boson is required to decay to a pair of charged leptons or a b b-bar quark pair. The searches use the 8 TeV pp collision dataset collected by the CMS detector at the LHC, corresponding to an integrated luminosity of up to 19.7 inverse femtobarns. Certain channels include data from 7 TeV collisions corresponding to an integrated luminosity of 4.9 inverse femtobarns. The searches are sensitive to non-standard-model invisible decays of the recently observed Higgs boson, as well as additional Higgs bosons with similar production modes and large invisible branching fractions. In all channels, the observed data are consistent with the expected standard model backgrounds. Limits are set on the production cross section times invisible branching fraction, as a function of the Higgs boson mass, for the vector boson fusion and ZH production modes. By combining all channels, and assuming standard model Higgs boson cross sections and acceptances, the observed (expected) upper limit on the invisible branching fraction at m[H] = 125 GeV is found to be 0.58 (0.44) at 95% confidence level. We interpret this limit in terms of a Higgs-portal model of dark matter interactions.
Search For A Higgs Boson In The Decay Channel H To Zz To Q Qbar Ell L In Pp Collisions At Sqrt S
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Author :
language : en
Publisher:
Release Date : 2012
Search For A Higgs Boson In The Decay Channel H To Zz To Q Qbar Ell L In Pp 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 2012 with categories.
A search for the standard model Higgs boson decaying into two Z bosons with subsequent decay into a final state containing two quark jets and two leptons, H to ZZ(*) to q q-bar l-l+ is presented. Results are based on data corresponding to an integrated luminosity of 4.6 inverse femtobarns of proton-proton collisions at sqrt(s)=7 TeV, collected with the CMS detector at the LHC. In order to discriminate between signal and background events, kinematic and topological quantities, including the angular spin correlations of the decay products, are employed. Events are further classified according to the probability of the jets to originate from quarks of light or heavy flavor or from gluons. No evidence for the Higgs boson is found, and upper limits on its production cross section are determined for a Higgs boson of mass between 130 and 600 GeV.
Search For A Charged Higgs Boson In Pp Collisions At Sqrt S
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Author :
language : en
Publisher:
Release Date : 2015
Search For A Charged Higgs Boson In Pp 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 2015 with categories.
Search For Exotic Decays Of The Higgs Boson Into B Overline And Missing Transverse Momentum In Pp Collisions At Square Root S
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Author : [Study Group] ATLAS Collaboration CERN
language : en
Publisher:
Release Date : 2022
Search For Exotic Decays Of The Higgs Boson Into B Overline And Missing Transverse Momentum In Pp Collisions 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.