3,853 Result(s)
within
**u-**u Zhang
Physics
Elementary Particles, Quantum Field Theory
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Article
Energy carried by gamma rays and neutral particles in multihadron final states at petra
The fraction of the total available energy carried by photons and the fraction carried by neutral particles of all types ine + e − multihadron final states have been measured at three centre-of-mass energies betw...
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Article
Electroweak interference effects in the high energye ++e −→e ++e −+hadrons process
We examine interference effects of the electrowcak interaction in the high energye ++e −→e + +e −+hadrons process. The effect provides a further test of the G-W-S model [1] and may lead to a better understanding ...
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Article
Prompt electron production ine + e − annihilations at 29 GeV
We have measured the inclusive prompt electron cross section over a wide momentum range (P>0.5 GeV/c) with the PEP-4 TPC detector. The semielectronic branching fractions of thec andb quarks are (9.1±0.9 (stat.)±1...
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Article
Tests of models for quark and gluon fragmentation ine + e − annihilation at \(\sqrt s = 29 GeV\)
Three currently used fragmentation models are tested by studying the distribution of particles between jet axes in the 3-jet events ofe + e − annihilation, using data collected by the Time Projection Chamber at P...
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Article
Inclusive γ and π0 production cross sections and energy fractions ine + e − annihilation at 29 GeV
Inclusive production cross sections for photons and π0's ine + e − annihilation at a center of mass energy of 29 GeV have been measured. The π0 production spectrum agrees with a corresponding measurement for π±. ...
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Article
Quark fragmentation functions and long-range correlations ine + e − annihilation at 29 GeV
We study long-range correlations between hadrons in opposite jets ine + e − annihilation events at \(\sqrt s \) =29 G...
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Chapter
Do Nucleons Dissolve in Giant Nuclei?
An interesting and until now unanswered question is how quarks, confined within a bag, interact when their number is very large. Can their residual interaction be understood in terms of perturbation theory or ...
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Article
Measurement of the photon structure functionF 2 γ (x, Q2) in the region 0.2<Q 2<7 GeV2
We present a measurement of the photon structure functionF 2 γ in the reactionee→eeX forQ 2 in the range 0.2<Q 2<7 GeV2, using 9,200 multihadron events obtain...
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Article
Relativistic corrections in coupled channel mixing
We examine relativistic effects in a coupled channel mixing calculation of corrections to charmonium energy levels. We find that the relativistic effect on the coupled channel mixing is large. Thus a relativis...
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Article
Exact calculation of the Fermion determinant in chiral QCD2 reflecting the full regularization dependence
The fermion determinant of non-abelian anomalous gauge theory in two space-time dimensions is computed using the path-integral approach. The regularization dependence of the fermion determinant is worked out. ...
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Chapter
Expectations for Direct Photon Physics from Fermilab Experiment E705
The E705 scintillation glass/lead glass electromagnetic calorimeter is described. The trigger used for recording high transverse momentum direct photon signals from 300 GeV/c π−, π+,
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Chapter and Conference Paper
The Study of X-Ray Radiation from AGNs
This is a summary report based on several recent papers devoted to the study of X-ray emission in active galactic nuclei (including quasars) [1], [2], [3].
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Chapter and Conference Paper
The Correlation Strength of Clusters in the Cosmic String Model
It is known that the two-point correlation functions of galaxies and of clusters of galaxies have three systematic characteristics. 1. all correlation functions have power laws with approximately the same inde...
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Article
The contribution of color-octet current color-octet current toD decays
Bauer and Stech pointed out that inD decaysa 1 anda 2 are approximately equal toc 1 andc 2 obtained from the renormalization group equation. This means that the non-leading 1/N c ...
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Article
Anomaly processes of the system of technions and gauge bosons
By gauging Wess-Zumino term in the technicolor model, we obtain the low energy effective action of the system of technions and gauge bosons (gluons, photon,W ± andZ 0). These actions show some new anomaly process...
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Article
Topological vacua and spontaneous CP violations in Yang-Mills theories
From the consideration of the topological structures of Yang-Mills theories, we obtain the results thatSU(2) Yang-Mills theory in the Minkowski space has the vacua of topologyZ⊕Z 2. Therefore, we argue that the p...
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Article
Gravitational wave due to explosion of SN 1987A
Observations of the gravitational waves from the explosion of SN 1987A are shown to be more consistent with a new special relativistic theory of gravitation than with predictions of general relativity.
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Article
Special relativistic gravitational theory
Based on special relativity, we introduce a way to develop a new field theory from (1) the relativistic property of the particle coupling coefficient with the field, and (2) the field due to a static point sou...
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Article
Measurement of electroweak parameters fromZ decays into fermion pairs
We report on the properties of theZ resonance from 62 500Z decays into fermion pairs collected with the ALEPH detector at LEP, the Large Electron-Positron storage ring at CERN. We findM Z=(91.193±0.016exp±0.030LE...
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Article
Search for low mass Higgs bosons produced inZ 0 decays
A search for light Higgs bosons was performed using the data sample collected in 1990 by the DELPHI detector at LEP, at centre of mass energies between 88.2 and 94.2 GeV. Using the process e+e−→H 0+Z 0*,Z 0*→ff, ...
