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Author :
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ISBN 13 :
Total Pages : 194 pages
Book Rating : 4.:/5 (318 download)
Download or read book Electroweak Precision Data and the Higgs Mass written by and published by . This book was released on 2003 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 :
Total Pages : 7 pages
Book Rating : 4.:/5 (16 download)
Download or read book Do Electroweak Precision Data and Higgs Mass Constraints Rule Out a Scalar Bottom Quark with Mass of O(5-GeV)? written by and published by . This book was released on 2000 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt:
![Download Do Electroweak Precision Data and Higgs-mass Constraints Rule Out a Scalar Bottom Quark with Mass of Θ [Theta] (5 GeV) PDF Online Free](https://books.google.com/books/content/images/frontcover/1OzTzQEACAAJ?fife=w200-h370)
Download or read book Do Electroweak Precision Data and Higgs-mass Constraints Rule Out a Scalar Bottom Quark with Mass of Θ [Theta] (5 GeV) written by and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
![Download Do Electroweak Precision Data and Higgs-mass Constraints Rule Out a Scalar Bottom Quark with Mass of _H63 [Theta] (5 GeV)? PDF Online Free](https://books.google.com/books/content/images/frontcover/7PkHHQAACAAJ?fife=w200-h370)
Download or read book Do Electroweak Precision Data and Higgs-mass Constraints Rule Out a Scalar Bottom Quark with Mass of _H63 [Theta] (5 GeV)? written by and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Arno Straessner
Publisher : Springer
ISBN 13 : 3642051693
Total Pages : 222 pages
Book Rating : 4.6/5 (42 download)
Download or read book Electroweak Physics at LEP and LHC written by Arno Straessner and published by Springer. This book was released on 2010-03-14 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt: During more than 10 years, from 1989 until 2000, the LEP accelerator and the four LEP experiments, ALEPH, DELPHI, L3 and OPAL, have taken data for a large amount of measurements at the frontier of particle physics. The main outcome is a thorough and successful test of the Standard Model of electroweak interactions. Mass and width of the Z and W bosons were measured precisely, as well as the Z and photon couplings to fermions and the couplings among gauge bosons. The rst part of this work will describe the most important physics results of the LEP experiments. Emphasis is put on the properties of the W boson, which was my main research eld at LEP. Especially the precise determination of its mass and its couplings to the other gauge bosons will be described. Details on physics effects like Colour Reconnection and Bose-Einstein Correlations in W-pair events shall be discussed as well. A conclusive summary of the current electroweak measurements, including low-energy results, as the pillars of possible future ndings will be given. The important contributions from Tevatron, like the measurement of the top quark and W mass, will round up the present day picture of electroweak particle physics. This is an open access book.
Author : Stefan Roth
Publisher : Springer
ISBN 13 : 3540351655
Total Pages : 181 pages
Book Rating : 4.5/5 (43 download)
Download or read book Precision Electroweak Physics at Electron-Positron Colliders written by Stefan Roth and published by Springer. This book was released on 2007-04-16 with total page 181 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book reviews recent contributions of electron positron colliders to the precision test of the electroweak Standard Model. It includes a short summary of the measurements at the Z resonance and gives an overview of the electroweak processes above the Z. Subsequently, measurements of the W mass at LEP are discussed in detail. Late chapters offer an outlook on electroweak physics at the future LHC. Also features many illustrations and tables.
Download or read book Present and Future Electroweak Precision Measurements and the Indirect Determination of the Mass of the Higgs Boson written by and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We discuss the experimental and theoretical uncertainties on precision electroweak observables and their relationship to the indirect constraints on the Higgs boson mass, MH, in the Standard Model (SM). The critical experimental measurements (M{sub W}, sin2?{sub eff}, m{sub t}, ...) are evaluated in terms of their present uncertainties and their prospects for improved precision at future colliders, and their contribution to the constraints on MH. In addition, the current uncertainties of the theoretical predictions for M{sub W} and sin2?{sub eff} due to missing higher order corrections are estimated and expectations and necessary theoretical improvements for future colliders are explored. The constraints from rare B decays are also discussed. Analysis of the present experimental and theoretical precisions yield a current upper bound on M{sub H} of ≈ 200 GeV. Including anticipated improvements corresponding to the prospective situation at future colliders (Tevatron Run II, LHC, LC/GigaZ), we find a relative precision of about 25% to 8% (or better) is achievable in the indirect determination of M{sub H}.
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ISBN 13 :
Total Pages : 5 pages
Book Rating : 4.:/5 (684 download)
Download or read book How Can a Heavy Higgs Boson be Consistent with the Precision Electroweak Measurements?. written by and published by . This book was released on 2001 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: The fit of precision electroweak data to the Minimal Standard Model currently gives an upper limit on the Higgs boson mass of 170 GeV at 95% confidence. Nevertheless, it is often said that the Higgs boson could be much heavier in more general models. In this paper, we critically review models that have been proposed in the literature that allow a heavy Higgs boson consistent with the precision electroweak constraints. All have unusual features, and all can be distinguished from the Minimal Standard Model either by improved precision measurements or by other signatures accessible to next-generation colliders.
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ISBN 13 :
Total Pages : 29 pages
Book Rating : 4.:/5 (683 download)
Download or read book Electroweak Precision Measurements and Collider Probes of the Standard Model with Large Extra Dimensions written by and published by . This book was released on 1999 with total page 29 pages. Available in PDF, EPUB and Kindle. Book excerpt: The elementary particles of the Standard Model may live in more than 3+1 dimensions. We study the consequences of large compactified dimensions on scattering and decay observables at high-energy colliders. Our analysis includes global fits to electroweak precision data, indirect tests at high-energy electron-positron colliders (LEP2 and NLC), and direct probes of the Kaluza-Klein resonances at hadron colliders (Tevatron and LHC). The present limits depend sensitively on the Higgs sector, both the mass of the Higgs boson and how many dimensions it feels. If the Higgs boson is trapped on a 3+1 dimensional wall with the fermions, large Higgs masses (up to 500 GeV) and relatively light Kaluza-Klein mass scales (less than 4 TeV) can provide a good fit to precision data. That is, a light Higgs boson is not necessary to fit the electroweak precision data, as it is in the Standard Model. If the Higgs boson propagates in higher dimensions, precision data prefer a light Higgs boson (less than 260 GeV), and a higher compactification scale (greater than 3.8 TeV). Future colliders can probe much larger scales. For example, a 1.5 TeV electron-positron linear collider can indirectly discover Kaluza-Klein excitations up to 31 TeV if 500 fb−1 integrated luminosity is obtained.
Download or read book PRECISION ELECTROWEAK MEASUREMENTS AND THE HIGGS MASS. written by and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The utility of precision electroweak measurements for predicting the Standard Model Higgs mass via quantum loop effects is discussed. Current constraints from m[sub w] and sin[sup 2] [theta][sub w] (m[sub z])[sub [ovr MS]] imply a relatively light Higgs [approx]
Author : W. J. MARCIANO
Publisher :
ISBN 13 :
Total Pages : 23 pages
Book Rating : 4.:/5 (316 download)
Download or read book PRECISION ELECTROWEAK MEASUREMENTS AND THE HIGGS MASS. written by W. J. MARCIANO and published by . This book was released on 2004 with total page 23 pages. Available in PDF, EPUB and Kindle. Book excerpt: The utility of precision electroweak measurements for predicting the Standard Model Higgs mass via quantum loop effects is discussed. Current constraints from m{sub w} and sin{sup 2} {theta}{sub w} (m{sub z}){sub {ovr MS}} imply a relatively light Higgs {approx}
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ISBN 13 :
Total Pages : 24 pages
Book Rating : 4.:/5 (684 download)
Download or read book Precision Electroweak Measurements written by and published by . This book was released on 1996 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent electroweak precision measurements fro {ital e}{ital e}− and {ital p{anti p}} colliders are presented. Some emphasis is placed on the recent developments in the heavy flavor sector. The measurements are compared to predictions from the Standard Model of electroweak interactions. All results are found to be consistent with the Standard Model. The indirect constraint on the top quark mass from all measurements is in excellent agreement with the direct {ital m{sub t}} measurements. Using the world's electroweak data in conjunction with the current measurement of the top quark mass, the constraints on the Higgs' mass are discussed.
Author : Paul G Langacker
Publisher : World Scientific
ISBN 13 : 9814602817
Total Pages : 1032 pages
Book Rating : 4.8/5 (146 download)
Download or read book Precision Tests Of The Standard Electroweak Model written by Paul G Langacker and published by World Scientific. This book was released on 1995-02-23 with total page 1032 pages. Available in PDF, EPUB and Kindle. Book excerpt: High precision measurements of weak neutral current and charged current processes and of the properties of the Z and W bosons have established the standard electroweak model as correct down to a distance scale of 10-16 cm, and are a sensitive probe of possible underlying physics. In this book, all aspects of the program are considered in detail, including the structure of the standard model, radiative corrections, high precision experiments, and their implications. The major classes of experiments are surveyed, covering the experiments themselves, the data analysis, results, and prospects.This volume is a detailed reference for theoretical and experimental researchers, as well as an introductory text for advanced students.
Author : Sven Heinemeyer
Publisher :
ISBN 13 :
Total Pages : 6 pages
Book Rating : 4.:/5 (761 download)
Download or read book Higgs-mass Predictions and Electroweak Precision Observables in the Standard Model and the MSSM written by Sven Heinemeyer and published by . This book was released on 2000 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Wolfgang Hollik
Publisher : Springer
ISBN 13 :
Total Pages : 184 pages
Book Rating : 4.X/5 (4 download)
Download or read book Electroweak Precision Tests at LEP written by Wolfgang Hollik and published by Springer. This book was released on 2000 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt: This review gives a brief discussion of the structure of the Standard Model and its quantum corrections. The predictions for the vector boson masses, the neutrino scattering cross-sections and the Z0 resonance observables are presented. The influence of virtual new physics effects on the observables is discussed with the minimal supersymmetric Standard Model taken as an example. Experimental measurements of electroweak observables are described with reference to studies performed at the e+e- collider LEP at energies close to the Z0 peak. The theoretical predictions are compared with experimental data and their implications for the Standard Model are discussed.
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ISBN 13 :
Total Pages : 12 pages
Book Rating : 4.:/5 (871 download)
Download or read book The Direct Limit on the Higgs Mass and the SM Fit written by and published by . This book was released on 2003 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: Because of two 3[sigma] anomalies, the Standard Model (SM) fit of the precision electroweak data has a poor confidence level, CL = 0.02. Since both anomalies involve challenging systematic issues, it might appear that the SM could still be valid if the anomalies resulted from underestimated systematic error. Indeed the CL of the global fit could then increase to 0.71, but that fit predicts a small Higgs boson mass, m{sub H} = 45 GeV, that is inconsistent at 95% CL with the lower limit, m{sub H}> 114 GeV, established by direct searches. The data then favor new physics whether the anomalous measurements are excluded from the fit or not, and the Higgs boson mass cannot be predicted until the new physics is understood. Some measure of statistical fluctuation would be needed to maintain the validity of the SM. New physics is favored, but the SM is not definitively excluded.
Author : Nathan L. Hall
Publisher : Springer
ISBN 13 : 3319202219
Total Pages : 127 pages
Book Rating : 4.3/5 (192 download)
Download or read book Hadron Structure in Electroweak Precision Measurements written by Nathan L. Hall and published by Springer. This book was released on 2015-07-24 with total page 127 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis examines the γZ box contribution to the weak charge of the proton. Here, by combining recent parity-violating electron-deuteron scattering data with our current understanding of parton distribution functions, the author shows that one can limit this model dependence. The resulting construction is a robust model of the γγ and γZ structure functions that can also be used to study a variety of low-energy phenomena. Two such cases are discussed in this work, namely, the nucleon’s electromagnetic polarizabilities and quark-hadron duality. By using phenomenological information to constrain the input structure functions, this important but previously poorly understood radiative correction is determined at the kinematics of the parity-violating experiment, QWEAK, to a degree of precision more than twice that of the previous best estimate. A detailed investigation into available parametrizations of the electromagnetic and interference cross-sections indicates that earlier analyses suffered from the inability to correctly quantify their model dependence.
