Measurements of Hadronic Decays of Z° Bosons

Measurements of Hadronic Decays of Z° Bosons
Title Measurements of Hadronic Decays of Z° Bosons PDF eBook
Author
Publisher
Pages 26
Release 1992
Genre
ISBN

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Z° bosons have been produced by collisions of longitudinally polarized electrons with unpolarized positrons at the SLAC Linear Collider and their decays have been recorded by the SLD experiment. We present preliminary measurements of the properties of the resulting Z° decays into multi-hadronic final states. We find good agreement with the predictions of perturbative QCD and fragmentation models.

Measurements of Hadronic Decays of Z[sup 0] Bosons

Measurements of Hadronic Decays of Z[sup 0] Bosons
Title Measurements of Hadronic Decays of Z[sup 0] Bosons PDF eBook
Author
Publisher
Pages 26
Release 1992
Genre
ISBN

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Z[degrees] bosons have been produced by collisions of longitudinally polarized electrons with unpolarized positrons at the SLAC Linear Collider and their decays have been recorded by the SLD experiment. We present preliminary measurements of the properties of the resulting Z[degrees] decays into multi-hadronic final states. We find good agreement with the predictions of perturbative QCD and fragmentation models.

Measurement of the Z-Boson Branching Fraction Into Hadrons Containing Bottom Quarks

Measurement of the Z-Boson Branching Fraction Into Hadrons Containing Bottom Quarks
Title Measurement of the Z-Boson Branching Fraction Into Hadrons Containing Bottom Quarks PDF eBook
Author J. Frederic Kral
Publisher
Pages 286
Release 1990
Genre
ISBN

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Measurement of the Z-boson Branching Fraction Into Hadrons Containing Bottom Quarks

Measurement of the Z-boson Branching Fraction Into Hadrons Containing Bottom Quarks
Title Measurement of the Z-boson Branching Fraction Into Hadrons Containing Bottom Quarks PDF eBook
Author
Publisher
Pages 106
Release 1990
Genre
ISBN

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We use the Mark II detector to study Z decays into bottom quark-anti-quark pairs, leading to the production of bottom hadrons. The Z bosons are formed in ee− annihilation at the SLC at center-of-mass energies between 89 and 93 GeV. We identify events containing semileptonic decays of bottom hadrons by detecting isolated leptons, i.e leptons with high transverse momenta relative to the nearest hadronic jet. Using isolated electrons and muons, we measure the B-hadron semileptonic branching ratio times the fraction of hadronic Z decays which contain bottom hadrons, B(B 2!Xl[nu]){center dot}[Gamma](Z 2!b{bar b})/[Gamma](Z 2!had) = 0.025 {sub -0.009}{sup +0.100} {plus minus} 0.005, where we have listed the statistical errors followed by the systematic error. Assuming B(B 2!X(ell)[nu]) = 11% {plus minus} 1%, we measure [Gamma](Z 2!b{bar b})/[Gamma](Z 2!had) = 0.23 {sub -0.09}{sup +0.11}, in good agreement with the standard-model prediction of 0.22. We find [Gamma](Z 2!b{bar b}) = 0.40 {sub -0.16}{sup +0.19} GeV. 83 refs., 34 figs., 19 tabs.

60 Years Of Cern Experiments And Discoveries

60 Years Of Cern Experiments And Discoveries
Title 60 Years Of Cern Experiments And Discoveries PDF eBook
Author Herwig Schopper
Publisher World Scientific
Pages 452
Release 2015-07-13
Genre Science
ISBN 9814644161

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The 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.

Precision Measurements of W and Z Boson Production and Their Decays to Electrons at Hadron Colliders

Precision Measurements of W and Z Boson Production and Their Decays to Electrons at Hadron Colliders
Title Precision Measurements of W and Z Boson Production and Their Decays to Electrons at Hadron Colliders PDF eBook
Author
Publisher
Pages 157
Release 2006
Genre
ISBN

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For many measurements at hadron colliders, such as cross sections and branching ratios, the uncertainty of the integrated luminosity is an important contribution to the error of the final result. In 1997, the ETH Zurich group proposed a new approach to determine the integrated luminosity via a counting measurement of the W and Z bosons through their decays to leptons. In this thesis this proposal has been applied on real data as well as on simulation for a future experiment.

The Physics of the Z and W Bosons

The Physics of the Z and W Bosons
Title The Physics of the Z and W Bosons PDF eBook
Author Roberto Tenchini
Publisher World Scientific
Pages 436
Release 2007
Genre Science
ISBN 9812779906

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For the first time, this invaluable book shows how cardiac perfusion and pumping can be quantified and correlated. Self-contained and unified in presentation, the explanations in the compendium are detailed enough to capture the reader's curiosity and complete enough to provide the background material to explore further into the subject. Mathematically rigorous and clinically oriented, the book is a major resource for cardiologists, cardiac surgeons and clinicians. For students, it is an ideal textbook for senior-level courses in cardiovascular engineering.