Analysis of the Vector Boson Self Interaction and the Search for Anomalous Couplings at Center-of-Mass Energy
Author:
Publisher:
Published: 2001
Total Pages:
ISBN-13:
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Analysis of the Vector Boson Self Interaction and the Search for Anomalous Couplings at [square Root]s
Author: Leonard Steven Christofek
Publisher:
Published: 2001
Total Pages: 444
ISBN-13:
DOWNLOAD EBOOKAnomalous Gauge Boson Interactions
Author:
Publisher:
Published: 2003
Total Pages:
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DOWNLOAD EBOOKWe discuss the direct measurement of the trilinear vector boson couplings in present and future collider experiments. The major goals of such experiments will be the confirmation of the Standard Model (SM) predictions and the search for signals of new physics. We review our current theoretical understanding of anomalous trilinear gauge-boson self interactions. If the energy scale of the new physics is[approx] 1 TeV, these low energy anomalous couplings are expected to be no larger than[Omicron](10[sup -2]). Constraints from high precision measurements at LEP and low energy charged and neutral current processes are critically reviewed.
International Symposium on Vector Boson Self-Interactions
Author: American Institute of Physics
Publisher:
Published: 1996
Total Pages: 440
ISBN-13:
DOWNLOAD EBOOKInternational Symposium on Vector Boson Self-Interactions
Author: Ulrich Baur
Publisher: American Inst. of Physics
Published: 2000-04-14
Total Pages: 432
ISBN-13: 9781563965203
DOWNLOAD EBOOKThis 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.
Anomalous Gauge Boson Couplings
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Publisher:
Published: 1997
Total Pages: 20
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DOWNLOAD EBOOKThe measurement of anomalous gauge boson self couplings is reviewed for a variety of present and planned accelerators. Sensitivities are compared for these accelerators using models based on the effective Lagrangian approach. The sensitivities described here are for measurement of {open_quotes}generic{close_quotes} parameters [kappa]{sub V}, [lambda]{sub V}, etc., defined in the text. Pre-LHC measurements will not probe these coupling parameters to precision better than O(10−1). The LHC should be sensitive to better than O(10−2), while a future NLC should achieve sensitivity of O(10−3) to O(10−4) for center of mass energies ranging from 0.5 to 1.5 TeV.
Scalar Boson Decays to Tau Leptons
Author: Cécile Caillol
Publisher: Springer
Published: 2017-11-15
Total Pages: 282
ISBN-13: 3319706500
DOWNLOAD EBOOKThis thesis presents a study of the scalar sector in the standard model (SM), as well as various searches for an extended scalar sector in theories beyond the SM (BSM). The first part of the thesis details the search for an SM Higgs boson decaying to taus, and produced by gluon fusion, vector boson fusion, or associated production with a vector boson, leading to evidence for decays of the Higgs boson to taus. In turn, the second part highlights several searches for an extended scalar sector, with scalar boson decays to taus. In all of the analyses presented, at least one scalar boson decays to a pair of taus. The results draw on data collected by the Compact Muon Solenoid (CMS) detector during proton–proton collisions with a center-of-mass energy of 7 or 8 TeV.
Combined Search for Anomalous Pseudoscalar HVV Couplings in VH Production and H to VV Decay
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Published: 2016
Total Pages:
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DOWNLOAD EBOOKA search for anomalous pseudoscalar couplings of the Higgs boson H to electroweak vector bosons V (= W or Z) in a sample of proton-proton collision events corresponding to an integrated luminosity of 18.9 fb$^{-1}$ at a center-of-mass energy of 8 TeV is presented. Events consistent with the topology of associated VH production, where the Higgs boson decays to a pair of bottom quarks and the vector boson decays leptonically, are analyzed. The consistency of data with a potential pseudoscalar contribution to the HVV interaction, expressed by the effective pseudoscalar cross section fractions $f_{a_3}$, is assessed by means of profile likelihood scans. Results are given for the VH channels alone and for a combined analysis of the VH and previously published H $\rightarrow$ VV channels. Assuming the standard model ratio of the coupling strengths of the Higgs boson to top and bottom quarks, $ f_{a_3}^{\mathrm{ZZ}}>0.0034$ is excluded at 95% confidence level in the combination.
Energy Research Abstracts
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Published: 1995
Total Pages: 782
ISBN-13:
DOWNLOAD EBOOKStudy of Vector Boson Scattering and Search for New Physics in Events with Two Same-sign Leptons and Two Jets
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Publisher:
Published: 2015
Total Pages:
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DOWNLOAD EBOOKOur study of vector boson scattering in pp collisions at a center-of-mass energy of 8 TeV is presented. The data sample corresponds to an integrated luminosity of 19.4 fb-1 collected with the CMS detector. Candidate events are selected with exactly two leptons of the same charge, two jets with large rapidity separation and high dijet mass, and moderate missing transverse energy. The signal region is expected to be dominated by electroweak same-sign W-boson pair production. The observation agrees with the standard model prediction. Furthermore, the observed significance is 2.0 standard deviations, where a significance of 3.1 standard deviations is expected based on the standard model. Cross section measurements for W±W± and WZ processes in the fiducial region are reported. Bounds on the structure of quartic vector-boson interactions are given in the framework of dimension-eight effective field theory operators, as well as limits on the production of doubly charged Higgs bosons.
