Download or read book Combination of CDF and D0 Results on the W Boson Mass and Width written by and published by . This book was released on 2008 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: The results on the direct measurements of the W-boson mass and width, based on the data collected by the Tevatron experiments CDF and D− at Fermilab are summarized and combined. The CDF Run-0 (1988-1889) and Run-I (1992-1995) results have been re-averaged using the BLUE method and combined with Run-I D− results and the latest published results from CDF taken from the first period of Run-II (2001-2004). The results are corrected to have consistency between the parton distribution functions and electroweak parameters. The resulting Tevatron averages for the mass and total decay width of the W boson are: M{sub W} = 80432 ± 39 MeV and [Lambda]{sub W} = 2056 ± 62 MeV. The inclusion of a preliminary Run-II measurement of [Lambda]{sub W} from D−0 gives [Lambda]{sub W} = 2050 ± 58 MeV.
Download or read book Combination of CDF and D0 Results on the Width of the W Boson written by and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We summarize and combine direct measurements of the width of the W boson in data collected by the Tevatron experiments CDF and D0 at Fermilab. Results from CDF and D0 Run-I (1992-1995) have been combined with the CDF 200 pb−1 results from the first period of Run-II (2001-2004) and the recent 1 fb−1 result in the electron channel from D0 (2002-2006). The results are corrected for any inconsistencies in parton distribution functions and assumptions about electroweak parameters used in the different analyses. The resulting Tevatron average for the width of the W boson is [Lambda]{sub W} = 2,046 ± 49 MeV.
Download or read book Combination of CDF and D0 Results on W Boson Mass and Width written by and published by . This book was released on 2003 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Combination of CDF and D0 Results on the W Boson Width written by and published by . This book was released on 2005 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: The results on the direct measurements of the W-boson width, based on the data collected by the Tevatron experiments CDF and D0 at Fermilab during Run-I from 1992 to 1996 and Run-II since 2001 are summarized. The combination of the published Run-I and preliminary Run-II results, taking correlated uncertainties properly into account, is presented. The resulting preliminary Tevatron average for the total decay width of the W boson is: {Lambda}{sub W} = 2078 {+-} 87 MeV, where the total error consists of a statistical part of 62 MeV and a systematic part of 60 MeV.
Download or read book 2012 Update of the Combination of CDF and D0 Results for the Mass of the W Boson written by and published by . This book was released on 2012 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: We summarize and combine the results on the direct measurements of the mass of the W boson in data collected by the Tevatron experiments CDF and D0 at Fermilab. Earlier results from CDF Run-0 (1988-1989), D0 and CDF Run-I (1992-1995) and D0 results from 1 fb−1 (2002-2006) of Run-II data are now combined with two new, high statistics Run-II measurements: a CDF measurement in both electron and muon channels using 2.2 fb−1 of integrated luminosity collected between 2002 and 2007, and a D0 measurement in the electron channel using 4.3 fb−1 collected between 2006 and 2009. As in previous combinations, the results are corrected for inconsistencies in parton distribution functions and assumptions about electroweak parameters used in the different analyses. The resulting Tevatron average for the mass of the W boson is M{sub W} = 80,387 ± 16 MeV and a new world average including data from LEP II is M{sub W} = 80,385 ± 15 MeV.
Download or read book Updated Combination of CDF and D0 Results for the Mass of the W Boson written by and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Combination of CDF and D0 W Boson Mass Measurements written by and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Combination of CDF and D0 Measurements of the W Boson Helicity in Top Quark Decays written by and published by . This book was released on 2012 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: We report the combination of recent measurements of the helicity of the W boson from top quark decay by the CDF and D0 collaborations, based on data samples corresponding to integrated luminosities of 2.7-5.4 fb−1 of p{bar p} collisions collected during Run II of the Fermilab Tevatron Collider. Combining measurements that simultaneously determine the fractions of W bosons with longitudinal (f0) and right-handed (f+) helicities, we find f0 = 0.722 ± 0.081 [± 0.062 (stat.) ± 0.052 (syst.)] and f+ = -0.033 ± 0.046 [± 0.034 (stat.) ± 0.031 (syst.)]. Combining measurements where one of the helicity fractions is fixed to the value expected in the standard model, we find f0 = 0.682 ± 0.057 [± 0.035 (stat.) ± 0.046 (syst.)] and f+ =?0.015 ± 0.035 [± 0.018 (stat.) ± 0.030 (syst.)]. The results are consistent with standard model expectations.
Download or read book The Higgs Boson Discovery at the Large Hadron Collider written by Roger Wolf and published by Springer. This book was released on 2015-05-18 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a comprehensive overview of the field of Higgs boson physics. It offers the first in-depth review of the complete results in connection with the discovery of the Higgs boson at CERN’s Large Hadron Collider and based on the full dataset for the years 2011 to 2012. The fundamental concepts and principles of Higgs physics are introduced and the important searches prior to the advent of the Large Hadron Collider are briefly summarized. Lastly, the discovery and first mensuration of the observed particle in the course of the CMS experiment are discussed in detail and compared to the results obtained in the ATLAS experiment.
Download or read book High Precision W Boson Studies with LHCb written by Ross Hunter and published by Springer Nature. This book was released on 2024-01-02 with total page 179 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book details a new and ground-breaking contribution to the search for a successor to the Standard Model (SM) of particle physics - the largest modern endeavour in the field. In the hope of seeing a discrepancy with the SM's predictions, this work discusses two hitherto unforeseen measurements at the frontier of experimental precision: a measurement of W-boson mass and a test of the fundamental axiom of the W boson's lepton flavour universality (LFU). Both measurements are made by analysing collision data from the LHCb experiment at the Large Hadron Collider (LHC) at CERN, and represent the establishment of a new field of high-precision Standard Model tests with LHCb. This book also describes the development of new software tools for the optimisation of the LHCb trigger system, which helps to ensure that LHCb's exciting physics program can continue to prosper into the future. This book is accessible to those with graduate—or master's—level training in experimental particle physics.
Download or read book New Results And Actual Problems In Particle Astroparticle Physics And Cosmology Proceedings Of Xxixth International Workshop On High Energy Physics written by Roman Anatolievich Ryutin and published by World Scientific. This book was released on 2014-03-26 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt: This unique volume contains the materials of the XXIXth International Workshop on High Energy Physics. The content of the volume is much wider than just high-energy physics and actually concerns all the most fundamental areas of modern physics research: high-energy physics proper, gravitation and cosmology. Presentations embrace both theory and experiment.
Download or read book Electroweak Physics at LEP and LHC written by Arno Straessner and published by Springer Science & Business Media. This book was released on 2010-03-31 with total page 221 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.
Download or read book Particle Physics and Cosmology written by Howard E. Haber and published by World Scientific. This book was released on 2004 with total page 913 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book contains the lecture courses conducted at the School of the Theoretical Advanced Study Institute (TASI, Colorado, USA) on Elementary Particle Physics in 2002. In this School, three series of lectures are presented in parallel in the area of phenomenology, TeV-scale physics, and astroparticles physics. The phenomenology lecture series covered a broad spectrum of standard research techniques used to interpret present day and future collider data. The TeV-scale physics lecture series focused on modern speculations about physics beyond the Standard Model, with an emphasis on supersymmetry and extra-dimensional theories. The lecture series on astroparticle physics treated recent developments in theories of dark matter and dark energy, the cosmic microwave background, and prospects for the upcoming era of gravitational wave astronomy. Contents: Phenomenology Lecture Series: Neutrinos (Y Grossman); Precision Electroweak Physics (K Matchev); Effective Field Theories (I Z Rothstein); Bottom Quark Physics and the Heavy Quark Expansion (M Luke); The Top Quark, QCD and New Physics (S Dawson); Tevatron Physics (J Womersley); TeV-Scale Physics Lecture Series: Non-Perturbative Sypersymmetry (J Terning); New Directions for New Dimensions: KaluzaOCoKlein Theory, Large Extra Dimensions and the Brane World (K R Dienes); New Ideas in Symmetry Breaking (M Quiros); Extra Dimensions and Branes (C Csaki); Astroparticle Physics Lecture Series: Introduction to Cosmology (M Trodden & S M Carroll); Dark Matter (K A Olive); Gravitational Waves from the Early Universe (A Buonanno). Readership: Researchers, academics and graduate students in high energy physics, mathematical physics and astrophysics."
Download or read book Hadron Collider Physics 2002 written by Martin Erdmann and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 533 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hadron colliders probe physics at new energy frontiers and search for new particles and forces. In addition, hadron colliders now provide also an environment for precision physics. The present volume collects the results from recently completed runs at major colliders as well as new ideas about collider physics and techniques. It will serve as the main source of reference in the field for many years to come.
Download or read book The Road to Discovery written by John Alison and published by Springer. This book was released on 2014-09-11 with total page 314 pages. Available in PDF, EPUB and Kindle. Book excerpt: The research presented here includes important contributions on the commissioning of the ATLAS experiment and the discovery of the Higgs boson. The thesis describes essential work on the alignment of the inner tracker during the commissioning of the experiment and development of the electron identification algorithm. The subsequent analysis focuses on the search for the Higgs boson in the WW channel, including the development of a method to model the critical W+jet background. In addition, the thesis provides excellent introductions, suitable for non-specialists, to Higgs physics, to the LHC, and to the ATLAS experiment.
Download or read book W Mass Measurements from D circle slash and CDF Experiments at TeVatron written by and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors present preliminary measurements of the W boson mass made by the D0 and CDF experiments using data collected at the Fermilab TeVatron [bar p]p collider operating at [radical]s = 1.8 TeV. The result from the CDF W [yields] e[nu] data analysis is M[sub W] = 80.47 [+-] 0.15(stat) [+-] 0.25(sys) GeV/c[sup 2] and the result from the CDF W [yields] [mu][nu] data analysis is M[sub W] = 80.29 [+-] 0.20(stat) [+-] 0.24(sys) GeV/c[sup 2]. The result from the D0 W [yields] e[nu] data analysis is M[sub W] = 79.86 [+-] 0.16(stat) [+-] 0.31(sys) GeV/c[sup 2]. When combined with the previous measurements, these results yield a world average value of M[sub W], 80.23 [+-] 0.18 GeV/c[sup 2].
Download or read book Statistical Methods for Data Analysis in Particle Physics written by Luca Lista and published by Springer. This book was released on 2017-10-13 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt: This concise set of course-based notes provides the reader with the main concepts and tools needed to perform statistical analyses of experimental data, in particular in the field of high-energy physics (HEP). First, the book provides an introduction to probability theory and basic statistics, mainly intended as a refresher from readers’ advanced undergraduate studies, but also to help them clearly distinguish between the Frequentist and Bayesian approaches and interpretations in subsequent applications. More advanced concepts and applications are gradually introduced, culminating in the chapter on both discoveries and upper limits, as many applications in HEP concern hypothesis testing, where the main goal is often to provide better and better limits so as to eventually be able to distinguish between competing hypotheses, or to rule out some of them altogether. Many worked-out examples will help newcomers to the field and graduate students alike understand the pitfalls involved in applying theoretical concepts to actual data. This new second edition significantly expands on the original material, with more background content (e.g. the Markov Chain Monte Carlo method, best linear unbiased estimator), applications (unfolding and regularization procedures, control regions and simultaneous fits, machine learning concepts) and examples (e.g. look-elsewhere effect calculation).
