1,787 Result(s)
within
Elementary Particles, Quantum Field Theory
**ng Long
Physics
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Chapter and Conference Paper
Regularization and Feynman rules in noncovariant gauges
A regularization scheme for defining Feynman rules in the path-integral formalism is proposed. It is applied to pure abelian gauge theory and to obtaining regularized propagators in noncovariant gauges. The pr...
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Article
Weak boson plus jet production in 2nd-order QCD
We calculate cross sections for the production ofW + andZ bosons in association with 1 and 2 jets at \(p\bar p\) col...
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Article
Gluon propagator and self-energy in the temporal gauge
A double-pole type of prescription for the unphysical singularities of Yang-Mills theory quantized in the temporal gauge is introduced to study the renormalization problem of the theory in two approaches. The ...
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Article
Anomalous dimensions of nonlocal baryon operators
The background-field method is used to evaluate the logarithmic contributions to a nonlocal three-quark operator on the light-cone. The operator is composed of nonlocal operators of different spins, whose anom...
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Article
Hadronic energy distributions in deep-inelastic electron-proton scattering
This paper presents energy distributions of the hadronic system produced in neutral-current electron-proton deep-inelastic scattering at a centre of mass energy of 296 GeV. Comparison of the results with QCD M...
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Article
Representation of fuzzy quantum posets of types I, II
Let (Ω,M) be a fuzzy quantum poset of type I, II, or FQP of type I, II for short. For Boolean representations of fuzzy quantum spaces, by a representation of (Ω,M) we mean a quantum logic ℳ (i.e., an orthocomplem...
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Article
Search for neutral Higgs bosons in the minimal supersymmetric extension of the standard model
A search for the neutral Higgs bosons h0 and A0, predicted by the Minimal Supersymmetric Extension of the Standard Model (MSSM), has been performed by the OPAL Collaboration at LEP. The analysis was based on appr...
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Article
QCD studies using a cone-based jet finding algorithm fore + e − collisons at LEP
We describe a cone-based jet finding algorithm (similar to that used in \(\bar p\) p experiments), which we have app...
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Article
Measurement of the production rates of charged hadrons ine + e −-annihilation at theZ 0
The inclusive production rates of π±,K ± andp \(\bar p\) inZ 0 decays have been measured with the OPAL detector at ...
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Article
Measurement of total and partial photon proton cross sections at 180 GeV center of mass energy
Photon proton cross sections for elastic light vector meson production, σ el νp , inelastic diffractive production, σ nd νp ...
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Article
A study of mean sub-jet multiplicities in two- and three-jet hadronicZ 0 decays
This paper describes an analysis of sub-jet multiplicities, which are expected to be sensitive to the properties of soft gluon radiation, in hadronic decays of theZ 0. Two- and three-jet event samples are selecte...
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Article
Observations of π-B charge-flavor correlations and resonant Bπ and BK production
Evidence is presented for kinematic and charge correlations of B mesons with charged pions and kaons. Using a new technique, a sample of over 80 000 partially reconstructed B mesons is obtained in 3.5·106 hadroni...
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Article
Inclusive strange vector and tensor meson production in hadronic Z0 decays
Measurements have been made in the OPAL experiment at LEP of the inclusive production of strange vector φ(1020) and K*(892)0 mesons, and the tensor meson K 2 *
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Article
Neutral strange particle production in deep inelastic scattering at HERA
This paper presents measurements ofK 0 and Λ production in neutral current, deep inelastic scattering of 26.7 GeV electrons and 820 GeV protons in the kinematic range 10<Q 2<640 GeV2, 0.0003<x<0.01, andy>0.04. Av...
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Article
Measurement of \(\Gamma (Z^0 \to b\bar b)/\Gamma (Z^0 \to hadrons)\) using a double tagging method
The fraction of \(Z^0 \to b\bar b\) ; events in hadronicZ 0 decays has been measured using the data collected by OPA...
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Article
Measurement of the hadronic decay current in τ−→π− − + v τ
The decay τ−→π− − + v τ has been studied using data collected with the OPAL detector at LEP during 1992 and 1993. The hadronic structure functions for this decay are measured model independently assuming G-parity...
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Article
Measurement of single photon production in e+e− collisions near the Z0 resonance
A measurement of the single photon production cross-section is presented based on a data-sample of 40.5 pb−1 collected with the OPAL detector at centre-of-mass energies within 3 GeV of the Z0 mass. Single photon ...
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Article
Comparisons of the properties of final state photons in hadronic Z0 decays with predictions from matrix element calculations
The properties of hadronic Z0 decays with final state photons, measured with OPAL at LEP, have been compared with predictions from two different matrix element calculations ofO(αα s ...
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Article
Measurement of multiplicity and momentum spectra in the current fragmentation region of the Breit frame at HERA
Charged particle production has been measured in Deep Inelastic Scattering (DIS) events using the ZEUS detector over a large range ofQ 2 from 10 to 1280 GeV2. The evolution withQ of the charged multiplicity and s...
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Article
A test ofCP-invariance in Z0→τ+τ− using optimal observables
Using 27 490 Z0→τ+τ− decays, accumulated in 1991, 1992 and 1993 with the OPAL detector at LEP, a direct test ofCP-invariance in the neutral current reactione + e −→τ+τ− is performed by measuringCP-odd observables...
