Measurement of the W Boson Mass at the LHC.
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Published: 1997
Total Pages: 6
ISBN-13:
DOWNLOAD EBOOKRead and Download eBook Full
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Published: 1997
Total Pages: 6
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DOWNLOAD EBOOKAuthor: Ross Hunter
Publisher: Springer Nature
Published: 2024-01-02
Total Pages: 179
ISBN-13: 3031497031
DOWNLOAD EBOOKThis 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.
Author: Bjørn Peter Sørensen
Publisher:
Published: 2012
Total Pages: 80
ISBN-13:
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Published: 2010
Total Pages:
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DOWNLOAD EBOOKThe W boson mass working group discussed the current status of the W boson mass measurement and the prospects for improving on LEP and Tevatron measurements at the LHC.
Author: J. Thanh Van Tran
Publisher: Atlantica Séguier Frontières
Published: 1988
Total Pages: 616
ISBN-13: 9782863320556
DOWNLOAD EBOOKAuthor: Phillip Killewald
Publisher:
Published: 2010
Total Pages: 144
ISBN-13:
DOWNLOAD EBOOKAbstract: The Large Hadron Collider (LHC) is a recently-activated proton-proton collider operating at a center-of-mass energy of 7 TeV. The Compact Muon Solenoid (CMS) is one of two general-purpose collider-detectors centered at one of the interaction points of the LHC. A measurement of the PW boson production cross-section and mass is presented to test the performance of the CMS detector in early (70 nb^-1) LHC data and to test theoretical predictions at this never-before-experienced energy regime. The cross-section measurement uses standard event counting techniques, while the mass measurement is performed using fitting of the analytical differential cross-section formula to the transverse mass spectrum from selected W to muon and muon neutrino events. The W production cross-section is measured to be [9,013 +/- 540 (stat.) +/- 552 (sys.) +/- 991 (lumi.)] pb, consistent with theoretical predictions at next-to-leading order in the strong coupling constant. The mass of the W is measured to be [80.07 +/- 0.64 (stat.) +/- 0.48 (sys.)] GeV/c^2, consistent with previous experimental measurements.
Author: Ulascan Sarica
Publisher: Springer Nature
Published: 2019-09-26
Total Pages: 103
ISBN-13: 3030254747
DOWNLOAD EBOOKThis thesis documents the measurement of lifetime, width, mass, and couplings to two electroweak bosons of the recently-discovered Higgs boson using data from the CMS experiment at the Large Hadron Collider. Both on-shell (at the mass of around 125 GeV) and off-shell (above 200 GeV) Higgs boson production is studied and an excess of off-shell production with significance above two standard deviations is observed for the first time. The latter is a qualitative new way to study the Higgs field, responsible for generation of mass of all the known elementary particles. In addition, phenomenological tools have been developed with the Monte Carlo event generator and matrix element techniques for an optional analysis of LHC data. Optimization of the CMS data with careful alignment of the silicon tracker is also presented.
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Published: 2012
Total Pages: 238
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DOWNLOAD EBOOKThe mass of the W boson is one of the most important parameters in the Standard Model. A precise measurement of the W boson mass, together with a precise measurement of the top quark mass, can constrain the mass of the undiscovered Higgs boson within the Standard Model framework or give a hint for physics beyond the Standard Model. This dissertation describes a measurement of the W boson mass through its decay into a muon and a neutrino using ~ 2.2 fb-1 of √ s = 1.96 TeV p$\bar{p}$ data taken with the CDF II detector at Fermilab. We measure the W boson mass to be (80.374 ± 0.015stat. ± 0.016syst.) GeV/c2. This result, when combined with the W mass measurement in the electron channel, leads to the single most precise mW value and greatly constrains the possible mass range of the undiscovered Higgs boson. iv.
Author: Herwig Schopper
Publisher: World Scientific
Published: 2015-07-13
Total Pages: 452
ISBN-13: 9814644161
DOWNLOAD EBOOKThe book is a compilation of the most important experimental results achieved during the past 60 years at CERN - from the mid-1950s to the latest discovery of the Higgs particle. Covering the results from the early accelerators at CERN to those most recent at the LHC, the contents provide an excellent review of the achievements of this outstanding laboratory. Not only presented is the impressive scientific progress achieved during the past six decades, but also demonstrated is the special way in which successful international collaboration exists at CERN.
Author:
Publisher:
Published: 1997
Total Pages: 5
ISBN-13:
DOWNLOAD EBOOKWe explore the ability of the Large Hadron Collider to measure the mass of the W boson. We believe that a precision better than (approximately) 15 MeV could be attained, based on a year of operation at low luminosity (1033 cm−2 s−1). If this is true, this measurement will be the world's best determination of the W mass. We feel this interesting opportunity warrants investigation in more detail. 10 refs., 2 figs.