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Anomalous Higgs Boson Couplings In Vector Boson Fusion By Tinghua Chen
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Book Synopsis Anomalous Higgs Boson Couplings in Vector Boson Fusion : by Tinghua Chen by : Tinghua Chen
Download or read book Anomalous Higgs Boson Couplings in Vector Boson Fusion : by Tinghua Chen written by Tinghua Chen and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The discovery of the Higgs boson at the Large Hadron Collider (LHC) in 2012 marked a significant milestone in particle physics. Since then, extensive investigations have been carried out to unravel the properties of the Higgs boson and understand its interactions with other fundamental particles. Monte Carlo simulations play an important role in studies of particle physics. They generate theoretical predictions and can be compared with experimental data to test our understanding of physics. In this dissertation, the anomalous Higgs boson coupling to vector bosons was implemented in VBFNLO for Higgs boson plus three jets via VBF at the next-to-leading order (NLO) accuracy. I present results for a number of collider observables that are sensitive to the CP structure, whether in different CP scenarios and in the Standard Model. I also investigate the effects of NLO multijet merging and NLO QCD corrections matched to a parton shower on selected observables through the framework provided by Herwig 7.
Book Synopsis Search for the Higgs Boson in the Vector Boson Fusion Channel at the ATLAS Detector by : Eric Ouellette
Download or read book Search for the Higgs Boson in the Vector Boson Fusion Channel at the ATLAS Detector written by Eric Ouellette and published by Springer. This book was released on 2015-01-20 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Thesis describes the first measurement of, and constraints on, Higgs boson production in the vector boson fusion mode, where the Higgs decays to b quarks (the most common decay channel), at the LHC. The vector boson fusion mode, in which the Higgs is produced simultaneously with a pair of quark jets, provides an unparalleled opportunity to study the detailed properties of the Higgs, including the possibility of parity and CP violation, as well as its couplings and mass. It thus opens up this new field of study for precision investigation as the LHC increases in energy and intensity, leading the way to this new and exciting arena of precision Higgs research.
Book Synopsis Higgs Constraints from Vector Boson Fusion and Scattering by :
Download or read book Higgs Constraints from Vector Boson Fusion and Scattering written by and published by . This book was released on 2015 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present results on 4-lepton + 2-jet production, the partonic processes most commonly described as vector boson pair production in the Vector Boson Fusion (VBF) mode. This final state contains diagrams that are mediated by Higgs boson exchange. We focus particularly on the high-mass behaviour of the Higgs boson mediated diagrams, which unlike on-shell production, gives information about the Higgs couplings without assumptions on the Higgs boson total width. We assess the sensitivity of the high-mass region to Higgs coupling strengths, considering all vector boson pair channels, W−W, W"W", W"Z and ZZ. Because of the small background, the most promising mode is WW which has sensitivity to Higgs couplings because of Higgs boson exchange in the t-channel. Using the Caola-Melnikov (CM) method, the off-shell couplings can be interpreted as bounds on the Higgs boson total width. We estimate the bound that can be obtained with current data, as well as the bounds that could be obtained at [arrow]" = 13TeV in the VBF channel for data samples of 100 and 300 fb−1. The CM method has already been successfully applied in the gluon fusion (GGF) production channel. The VBF production channel gives important complementary information, because both production and decay of the Higgs boson occur already at tree graph level.
Book Synopsis NLO QCC Corrections to the Jet Activity in Higgs Boson Production Via Vector-Boson Fusion by : Terrance Maynard Figy
Download or read book NLO QCC Corrections to the Jet Activity in Higgs Boson Production Via Vector-Boson Fusion written by Terrance Maynard Figy and published by . This book was released on 2006 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Study of (W/Z)H Production and Higgs Boson Couplings Using H2!WW* Decays with the ATLAS Detector by :
Download or read book Study of (W/Z)H Production and Higgs Boson Couplings Using H2!WW* Decays with the ATLAS Detector written by and published by . This book was released on 2015 with total page 65 pages. Available in PDF, EPUB and Kindle. Book excerpt: A search for Higgs boson production in association with a W or Z boson, in the H2!W W* decay channel, is performed with a data sample collected with the ATLAS detector at the LHC in proton-proton collisions at centre-of-mass energies [arrow]"=7 TeV and 8 TeV, corresponding to integrated luminosities of 4.5 fb-1 and 20.3 fb-1, respectively. The WH production mode is studied in two-lepton and three-lepton final states, while two- lepton and four-lepton final states are used to search for the ZH production mode. The observed significance, for the combined WH and ZH production, is 2.5 standard deviations while a significance of 0.9 standard deviations is expected in the Standard Model Higgs boson hypothesis. The ratio of the combined WH and ZH signal yield to the Standard Model expectation, [mu]VH, is found to be [mu]VH = 3.0-1.1+1.3 (stat.)-0.7+1.0 (sys.) for the Higgs boson mass of 125.36 GeV. WH and ZH production modes are also combined with the gluon fusion and vector boson fusion production modes studied in the H 2!W W* 2!l[nu]l[nu] decay channel, resulting in an overall observed significance of 6.5 standard deviations and [mu]ggF+VBF+VH=1.16-0.15+0.16 (stat.) -0.15+0.18 (sys.). The results are interpreted in terms of scaling factors of the Higgs boson couplings to vector bosons ([kappa]V) and fermions ([kappa]F); the combined results are.
Book Synopsis Analysis of the Vector Boson Self Interaction and the Search for Anomalous Couplings at Center-of-Mass Energy by :
Download or read book Analysis of the Vector Boson Self Interaction and the Search for Anomalous Couplings at Center-of-Mass Energy written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Study of (W/Z)H Production and Higgs Boson Couplings Using H2!W W * Decays with the ATLAS Detector by :
Download or read book Study of (W/Z)H Production and Higgs Boson Couplings Using H2!W W * Decays with the ATLAS Detector written by and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A search for Higgs boson production in association with a W or Z boson, in the H2!W W * decay channel, is performed with a data sample collected with the ATLAS detector at the LHC in proton-proton collisions at centre-of-mass energies \(\sqrt{s}=7 \) TeV and 8 TeV, corresponding to integrated luminosities of 4.5 fb-1 and 20.3 fb-1, respectively. The WH production mode is studied in two-lepton and three-lepton final states, while two- lepton and four-lepton final states are used to search for the ZH production mode. The observed significance, for the combined W H and ZH production, is 2.5 standard deviations while a significance of 0.9 standard deviations is expected in the Standard Model Higgs boson hypothesis. The ratio of the combined W H and ZH signal yield to the Standard Model expectation, [mu]V H, is found to be [mu] V H = 3.0-1.1+1.3 (stat.)-0.7 +1.0 (sys.) for the Higgs boson mass of 125.36 GeV. The W H and ZH production modes are also combined with the gluon fusion and vector boson fusion production modes studied in the H 2!W W * 2!l[nu]l[nu] decay channel, resulting in an overall observed significance of 6.5 standard deviations and [mu]ggF + VBF + VH = 1.16-0.15+0.16 (stat.) -0.15+0.18 (sys.). The results are interpreted in terms of scaling factors of the Higgs boson couplings to vector bosons ([kappa]V) and fermions ([kappa]F); the combined results are.
Book Synopsis Measurements of Higgs Boson Production and Couplings in Diboson Final States with the ATLAS Detector at the LHC. by :
Download or read book Measurements of Higgs Boson Production and Couplings in Diboson Final States with the ATLAS Detector at the LHC. written by and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Measurements are presented of production properties and couplings of the recently discovered Higgs boson using the decays into boson pairs, H→[gamma][gamma], H→ZZ{sup *}→4l and H→WW{sup *}→l[nu]l[nu]. The results are based on the complete pp collision data sample recorded by the ATLAS experiment at the CERN Large Hadron Collider at centre-of-mass energies of {radical s}=7 TeV and {radical s}=8 TeV, corresponding to an integrated luminosity of about 25 fb−1. Evidence for Higgs boson production through vector-boson fusion is reported. Results of combined fits probing Higgs boson couplings to fermions and bosons, as well as anomalous contributions to loop-induced production and decay modes, are presented. All measurements are consistent with expectations for the Standard Model Higgs boson.
Book Synopsis Search for the Higgs Boson Produced Via Vector-Boson Fusion in the Decay Channel H to Tau Tau by : Joram Berger
Download or read book Search for the Higgs Boson Produced Via Vector-Boson Fusion in the Decay Channel H to Tau Tau written by Joram Berger and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Study of the Standard Model Higgs Boson Decaying to a Pair of Tau Leptons with the CMS Detector at the LHC by : Tyler Henry Ruggles
Download or read book A Study of the Standard Model Higgs Boson Decaying to a Pair of Tau Leptons with the CMS Detector at the LHC written by Tyler Henry Ruggles and published by . This book was released on 2018 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis presents a 5.5 standard deviation observation of the Higgs boson decaying to fermions using the data collected at the LHC at 13 TeV center-of-mass energy. The studied dataset corresponds to an integrated luminosity of 35.9 inverse femtobarns. The best fit signal strength for the H to tau tau process is measured to be mu = 1.24 ^{+0.29}/{-0.27}, consistent with standard model predictions. Unique event categories are used targeting the leading Higgs boson production processes, gluon fusion, vector boson fusion, and associated production. This provides signal regions sensitive to Higgs boson couplings to both fermions and vector bosons. These two Higgs boson couplings are measured and are consistent with standard model predictions within one standard deviation. This 5.5 standard deviation observation of the H to tau tau process and the consistency of the Higgs boson couplings with the standard model provide confirmation of the Higgs boson Yukawa couplings to fermions. This is evidence that the Higgs field provides mass for the tau lepton in addition to the vector bosons.
Book Synopsis Measurement of the Higgs-boson Coupling to Tau-leptons and Combined Measurements of Higgs-boson Properties at Sqrt(s) by : Théo Megy
Download or read book Measurement of the Higgs-boson Coupling to Tau-leptons and Combined Measurements of Higgs-boson Properties at Sqrt(s) written by Théo Megy and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: The measurement of the Higgs-boson coupling to tau-leptons, based on an integrated luminosity of 36.1 ifb recorded at a centre-of-mass energy of 13 TeV by the ATLAS detector, is presented in this thesis. The analysis considers all combinations of leptonic and hadronic decays of tau-leptons, and targets the main two production modes of the Higgs boson, gluon Fusion and Vector-Boson Fusion. The inclusive cross section of the H->tautau decay channel is measured as 3.77 +1.06-0.95 (+0.60-0.59 (Stat.) +0.87-0.74 (Syst.)) pb, which corresponds to a deviation from the background-only hypothesis with an observed (expected) significance of 4.4 (4.1) standard deviations. In addition, the measurement of cross sections in the framework of Simplified Template Cross Sections is discussed. All measurement are in agreement with predictions of the Standard Model. The combined measurement of Higgs-boson properties is also presented, based on up to 79.8 ifb of data recorded at sqrt(s) = 13 TeV by the ATLAS detector. An observation of the four main production modes (ggF, VBF, VH and ttH+tH) and of four of the five main decay channels (H->gammagamma, H->ZZ, H->WW and H->bb) of the Higgs boson is achieved. In particular, the deviation from the background-only hypothesis with an observed (expected) significance of 6.5 (5.3) standard deviations for the VBF production mode is the first observation of this process by a single experiment. Measurements in the scope of the kappa-framework and of Simplified Template Cross Sections are also discussed. All the performed measurements are compatible with the Standard-Model expectations
Book Synopsis Observability of anomalous couplings of electroweak vector-bosons at the LHC and improved formulation of an effective vector-boson approximation by : Ingolf Kuss
Download or read book Observability of anomalous couplings of electroweak vector-bosons at the LHC and improved formulation of an effective vector-boson approximation written by Ingolf Kuss and published by . This book was released on 1996 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Anomalous Couplings, Resonances and Unitarity in Vector Boson Scattering by : Marco Sekulla
Download or read book Anomalous Couplings, Resonances and Unitarity in Vector Boson Scattering written by Marco Sekulla and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis International Symposium on Vector Boson Self-Interactions by : Ulrich Baur
Download or read book International Symposium on Vector Boson Self-Interactions written by Ulrich Baur and published by American Inst. of Physics. This book was released on 2000-04-14 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume contains the conference proceedings of the International Symposium on Vector Boson Self-interactions and should be of interest to researchers in elemental particle physics.
Book Synopsis Constraints on New Phenomena Via Higgs Boson Couplings and Invisible Decays with the ATLAS Detector by :
Download or read book Constraints on New Phenomena Via Higgs Boson Couplings and Invisible Decays with the ATLAS Detector written by and published by . This book was released on 2015 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: The ATLAS experiment at the LHC has measured the Higgs boson couplings and mass, and searched for invisible Higgs boson decays, using multiple production and decay channels with up to 4.7 fb-1 of pp collision data at √s=7 TeV and 20.3 fb-1 at √s=8 TeV. In the current study, the measured production and decay rates of the observed Higgs boson in the [gamma][gamma], ZZ, W W , Z[gamma], bb, [tau] [tau] , and [mu][mu] decay channels, along with results from the associated production of a Higgs boson with a top-quark pair, are used to probe the scaling of the couplings with mass. The limits are set on parameters in extensions of the Standard Model including a composite Higgs boson, an additional electroweak singlet, and two-Higgs-doublet models. Together with the measured mass of the scalar Higgs boson in the [gamma][gamma] and ZZ decay modes, a lower limit is set on the pseudoscalar Higgs boson mass of mA > 370 GeV in the "hMSSM" simplified Minimal Supersymmetric Standard Model. Results from direct searches for heavy Higgs bosons are also interpreted in the hMSSM. Finally, direct searches for invisible Higgs boson decays in the vector-boson fusion and associated production of a Higgs boson with W/Z (Z → ll, W/Z → jj) modes are statistically combined to set an upper limit on the Higgs boson invisible branching ratio of 0.25. As a result, the use of the measured visible decay rates in a more general coupling fit improves the upper limit to 0.23, constraining a Higgs portal model of dark matter.
Book Synopsis Precision Coupling Measurements of the Higgs Boson Using the H->ZZ*->4l Decay Channel by : Syed Haider Abidi
Download or read book Precision Coupling Measurements of the Higgs Boson Using the H->ZZ*->4l Decay Channel written by Syed Haider Abidi and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The coupling of the Higgs boson to other particles is probed by measuring the production cross sections at the Large Hadron Collider using the ATLAS detector. The present measurement is performed using the H->ZZ*->4l decay channel, with l= electron or muon and with datasets corresponding to various integrated luminosities. The inclusive production cross section is measured to be 1.34 +/- 0.12 pb, which is in good agreement with the predicted value of 1.33 +/- 0.08 pb. The gluon-gluon fusion, the vector boson fusion, the vector boson associated and the top associated production cross sections are measured to be 1.12 +/- 0.12 pb, 110 +/- 40 fb, 75 +61 -49 fb and 27 +26 -17 fb, respectively. The differential production cross sections are also measured using the Simplified Template cross sections framework. All measurements are in good agreement with the Standard Model predictions. These results are used to measure the Higgs boson coupling to fermions and vector bosons using the kappa-framework and to derive constraints on contributions from beyond the Standard Model physics using an effective field theory approach. No significant deviations from the Standard Model are observed.
Book Synopsis Search for the Non-resonant Vector Boson Fusion Production of the Higgs Boson Pairs Decaying to Bb[bar]bb[bar] Final State Using the ATLAS Detector by : Marta Czurylo
Download or read book Search for the Non-resonant Vector Boson Fusion Production of the Higgs Boson Pairs Decaying to Bb[bar]bb[bar] Final State Using the ATLAS Detector written by Marta Czurylo and published by . This book was released on 2023* with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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