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A Measurement of the Z Forward-backward Charge Asymmetry in Pp̄ --> E+e−

A Measurement of the Z Forward-backward Charge Asymmetry in Pp̄ --> E+e− PDF Author: Jedong Lee
Publisher:
ISBN:
Category :
Languages : en
Pages : 232

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A Measurement of the Z Forward-backward Charge Asymmetry in Pp̄ --> E+e−

A Measurement of the Z Forward-backward Charge Asymmetry in Pp̄ --> E+e− PDF Author: Jedong Lee
Publisher:
ISBN:
Category :
Languages : en
Pages : 232

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Measurement of the Forward-Backward Charge Asymmetry($A_{FB}$) Using $p\bar{p}\rightarrow Z/\gamma*\rightarrow E^+e^-$ Events in $\sqrt{S}

Measurement of the Forward-Backward Charge Asymmetry($A_{FB}$) Using $p\bar{p}\rightarrow Z/\gamma*\rightarrow E^+e^-$ Events in $\sqrt{S} PDF Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 266

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This 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.

Measurement of the Forward-backward Charge Asymmetry and Extraction of $sin^2Theta^{eff}_W$ in $p\bar{p} \to Z/\gamma^{*}+X \to E^+e^-+X$ Events Produced at $\sqrt{s}

Measurement of the Forward-backward Charge Asymmetry and Extraction of $sin^2Theta^{eff}_W$ in $p\bar{p} \to Z/\gamma^{*}+X \to E^+e^-+X$ Events Produced at $\sqrt{s} PDF Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :

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We present a measurement of the forward-backward charge asymmetry (A{sub FB}) in p{bar p} 2!Z/[gamma]* + X 2!ee− + X events at a center-of-mass energy of 1.96 TeV using 1.1 fb−1 of data collected with the D0 detector at the Fermilab Tevatron collider. A{sub FB} is measured as a function of the invariant mass of the electron-positron pair, and found to be consistent with the standard model prediction. We use the A{sub FB} measurement to extract the effective weak mixing angle sin2 [theta]{sub W}{sup eff} = 0.2327 ± 0.0018 (stat.) ± 0.0006 (syst.).

Measurement of the Polarized Forward-backward Asymmetry of Z° --] B{bar B} Using a Lifetime Tag and Momentum-weighted Track Charge

Measurement of the Polarized Forward-backward Asymmetry of Z° --] B{bar B} Using a Lifetime Tag and Momentum-weighted Track Charge PDF Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 6

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We 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.).

A Measurement of Forward-backward Charge Asymmetry of Electron-positron Pairs in Proton-antiproton Collison at 1.8 TeV

A Measurement of Forward-backward Charge Asymmetry of Electron-positron Pairs in Proton-antiproton Collison at 1.8 TeV PDF Author: Gregory Francisco Veramendi
Publisher:
ISBN:
Category :
Languages : en
Pages : 318

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Electroweak Physics: Measurement of the Forward-backward Charge Asymmetry of Electron-positron Pairs in P Anti-p Collisions at S**(1/2)

Electroweak Physics: Measurement of the Forward-backward Charge Asymmetry of Electron-positron Pairs in P Anti-p Collisions at S**(1/2) PDF Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :

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Book Description
We report a measurement of the forward-backward charge asymmetry of electrons from W boson decays in p{bar p} collisions at (square root)s = 1.96 TeV using a data sample of 170 pb−1 collected by the Collider Detector at Fermilab. The asymmetry is measured as a function of electron rapidity and transverse energy and provides new input on the momentum fraction dependence of the u and d quark parton distribution functions within the proton.

Measurement of the Forward-backward Charge Asymmetry from W ---] E Nu Production in P Anti-p Collisions at S**1/2

Measurement of the Forward-backward Charge Asymmetry from W ---] E Nu Production in P Anti-p Collisions at S**1/2 PDF Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 18

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Measurement of the Polarized Forward-Backward Asymmetry of Z0 Bb Using a Lifetime Tag and Momentum-Weighted Track Charge

Measurement of the Polarized Forward-Backward Asymmetry of Z0 Bb Using a Lifetime Tag and Momentum-Weighted Track Charge PDF Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 18

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Book Description
We 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° --> b{bar b}. The SLD experiment observes hadronic decays of Z° bosons produced at resonance in collisions of longitudinally polarized electrons and unpolarized positrons at the SLC. Heavy flavor decays of the Z° are identified by using the topologically reconstructed mass of B hadrons. 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%, and our 1993 sample of 1.8 pb−1 with a luminosity-weighted polarization of 63%, we obtain A{sub b} = 0.911 " 0.045(stat.) " 0.045(syst.).

A Measurement of the Forward-backward Asymmetry of Z - U+u- and a Search for an Additional Neural Vector Gauge Boson Using Electroweak Observables at OPAL

A Measurement of the Forward-backward Asymmetry of Z - U+u- and a Search for an Additional Neural Vector Gauge Boson Using Electroweak Observables at OPAL PDF Author: Paul Gareth Bright-Thomas
Publisher:
ISBN:
Category :
Languages : en
Pages : 211

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Physics in Collision 12

Physics in Collision 12 PDF Author: John P. Cumalat
Publisher: Atlantica Séguier Frontières
ISBN: 9782863321294
Category : Collisions (Nuclear physics)
Languages : en
Pages : 528

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