Measurement of Forward-backward Charge Asymmetry in the Process of B-quark Production in E + E - Annihilation Around √s
Author: M. Shirakata
Publisher:
Published: 1991
Total Pages:
ISBN-13:
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Author: M. Shirakata
Publisher:
Published: 1991
Total Pages:
ISBN-13:
DOWNLOAD EBOOKAuthor: M. Shirakata
Publisher:
Published: 1991
Total Pages: 0
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DOWNLOAD EBOOKAuthor: Timothy Lester Thomas
Publisher:
Published: 1995
Total Pages: 548
ISBN-13:
DOWNLOAD EBOOKAuthor: David Donald Stuart
Publisher:
Published: 1992
Total Pages: 236
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DOWNLOAD EBOOKAuthor:
Publisher:
Published: 1991
Total Pages:
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DOWNLOAD EBOOKAuthor: Billy E Bonner
Publisher: World Scientific
Published: 1990-11-19
Total Pages: 1140
ISBN-13: 9814583642
DOWNLOAD EBOOKDPF 90 at Rice University was planned as a major conference of truly international character which reviews recent developments in all areas of particle physics. Plenary session topics include new results from SLC, LEP, pp colliders, Heavy Quark Physics, High Energy Astrophysics. Two-day mini-conferences were held on the following subjects: Electroweak Physics, QCD and Hadron Physics, Theory Beyond the Standard Model, Non-accelerator Physics.
Author: David D. Stuart
Publisher:
Published: 1992
Total Pages: 0
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Published: 2015
Total Pages: 11
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DOWNLOAD EBOOKWe measure the particle-level forward-backward production asymmetry in $\mathrm{b\bar{b}}$ pairs with masses (m$\mathrm{b\bar{b}}$) larger than 150 GeV/c2, using events with hadronic jets and employing jet charge to distinguish b from $\bar{b}$. The measurement uses 9.5 fb-1 of $\mathrm{p\bar{p}}$ collisions at a center-of-mass energy of 1.96 TeV recorded by the CDF II detector. The asymmetry as a function of m$\mathrm{b\bar{b}}$ is consistent with zero, as well as with the predictions of the standard model. The measurement disfavors a simple model including an axigluon with a mass of 200 GeV/c2, whereas a model containing a heavier 345 GeV/c2 axigluon is not excluded.
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Published: 1995
Total Pages: 6
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DOWNLOAD EBOOKWe present a direct measurement of the parity-violating parameter A{sub b} by analyzing the left-right forward-backward asymmetry of b quarks in ee− --> Z{sup o} --> b{bar b}. The SLD experiment observes hadronic decays of Z{sup o} bosons produced at resonance in collisions of longitudinally polarized electrons and unpolarized positrons at the SLC. Heavy flavor decays of the Z{sup o} are identified by taking advantage of the long lifetime of B hadrons, the small, stable SLC beam spot, and precise tracking from SLD. The asymmetry A{sub b} is measured with a self-calibrating technique employing momentum-weighted track charge from both hemispheres in the tagged events. From our 1994--1995 sample of 3.6 pb−1 of ee− annihilation data with a luminosity-weighted average e− polarization of 77.3%, and our 1993 sample of 1.8 pb−1 with a luminosity-weighted polarization of 63.1%, we obtain A{sub b}(preliminary) = 0.843 " 0.046(stat.) " 0.051(syst.).
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Published: 2010
Total Pages: 266
ISBN-13:
DOWNLOAD EBOOKThis dissertation describes a measurement of the forward-backward asymmetry(A{sub FB}) in p{bar p} → Z/[gamma]* → ee events using 5.0 fb−1 data collected by the D0 detector at the Fermilab Tevatron. The AFB is measured as a function of the invariant mass of the electron-positron pair. Along with obtaining normalized differential cross section 1/[sigma] x d[sigma]/dM and Z to light quark couplings, we measured the Standard Model(SM) fundamental parameter, the effective weak mixing angle sin2 [theta]{sub eff}{sup lept}, with an unprecedented precise in light quark sector, namely the single D0 measurement has surpassed the LEP combination of four experiment results of inclusive hadronic charge asymmetry.