1991 Vol. 15, No. S3
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Abstract:
The method of determining the bunch length of collider by the vertex of charged particles which come from J/ψ decay is discussed. The bunch length of Beijing electron positron collider (BEPC) at the colliding region is presented.
The method of determining the bunch length of collider by the vertex of charged particles which come from J/ψ decay is discussed. The bunch length of Beijing electron positron collider (BEPC) at the colliding region is presented.
Abstract:
The γ ray energy from the parapositronium 2γ annihilation is measured as 510998.7(2.5) eV by using a silica aerogel sample with oxygen gas filled as the positronium source and by comparing with the known γ energy 511856.2(2.3) eV of the 106Ru γ ray. ...
The γ ray energy from the parapositronium 2γ annihilation is measured as 510998.7(2.5) eV by using a silica aerogel sample with oxygen gas filled as the positronium source and by comparing with the known γ energy 511856.2(2.3) eV of the 106Ru γ ray. ...
Abstract:
Based on a large amount of experiment information, it is assumed that SQS avalanche is developed when the electric field around the anode wire is heavily distorted by the space charge accumulated in the primary avalanche. Following this assumption ca...
Based on a large amount of experiment information, it is assumed that SQS avalanche is developed when the electric field around the anode wire is heavily distorted by the space charge accumulated in the primary avalanche. Following this assumption ca...
Abstract:
A detailed study of the basic characteristics of the proportional inclined chamber is conducted by analyzing the data from both beam test and theoretical simulation of the chamber. It shows that the position accuracy in the wire plane along the direc...
A detailed study of the basic characteristics of the proportional inclined chamber is conducted by analyzing the data from both beam test and theoretical simulation of the chamber. It shows that the position accuracy in the wire plane along the direc...
Abstract:
The main characteristics, the performance improvement,the current status,and the applications of Beijing Proton Linac (BPL) are described in this paper.
The main characteristics, the performance improvement,the current status,and the applications of Beijing Proton Linac (BPL) are described in this paper.
Abstract:
We suggest that the heavy neutral leptons in a specific version of SU(3)L×U(1) model not only act as dark matter particles but also provide a source of anomalous hard positrons in the cosmic rays above 10 GeV.
We suggest that the heavy neutral leptons in a specific version of SU(3)L×U(1) model not only act as dark matter particles but also provide a source of anomalous hard positrons in the cosmic rays above 10 GeV.
Abstract:
In the framework of the potential model, the mass, width and branching ratios of η'c are estimated. It is shown that it is possible for the width of the forbidden Ml transition η'c → γJ/ψ to raise one order of magnitude after considering relativistic...
In the framework of the potential model, the mass, width and branching ratios of η'c are estimated. It is shown that it is possible for the width of the forbidden Ml transition η'c → γJ/ψ to raise one order of magnitude after considering relativistic...
Abstract:
Boudjema et al. have found a very good method to identify the theoretical origin of various extra z0 bosons. This method can distinguish the different models very well. We calculate the z20 decay width from another model by using their method and com...
Boudjema et al. have found a very good method to identify the theoretical origin of various extra z0 bosons. This method can distinguish the different models very well. We calculate the z20 decay width from another model by using their method and com...
Abstract:
In this paper we give some relations for discriminating -+ exotic states and 1++ ordinary mesons in J/ψ hadronic decays by using the generalized moment analysis.
In this paper we give some relations for discriminating -+ exotic states and 1++ ordinary mesons in J/ψ hadronic decays by using the generalized moment analysis.
Abstract:
Using the Plana summation formula in the complex variable function theory, we calculate the Casimir energy related to the zero point fluctuations of an electromagnetic field in the three-dimensional vacuum space without introducing any cutofTparamete...
Using the Plana summation formula in the complex variable function theory, we calculate the Casimir energy related to the zero point fluctuations of an electromagnetic field in the three-dimensional vacuum space without introducing any cutofTparamete...
Abstract:
The Bjorken formula about maximum energy density in heavy ion collisions is improved. An effective way to increase the energy density is analyzed. Hydrodynamical equations and the equations of state in the central and fragmental regions are discussed...
The Bjorken formula about maximum energy density in heavy ion collisions is improved. An effective way to increase the energy density is analyzed. Hydrodynamical equations and the equations of state in the central and fragmental regions are discussed...
Abstract:
The relativistic hydrodynamic equations derived from the conservation of energy-momentum are generalized by including the equation of the particle number conservation. The influence of the latent heat and particle distribution on the spectrum is stud...
The relativistic hydrodynamic equations derived from the conservation of energy-momentum are generalized by including the equation of the particle number conservation. The influence of the latent heat and particle distribution on the spectrum is stud...
Abstract:
The N* (1535) model is proposed for pionic η-production reactions. The πN → ηN reaction cross-sections near the threshold and the S-wave η-N scattering length are calculated and compared with the experimental data and other theoretical calculations.
The N* (1535) model is proposed for pionic η-production reactions. The πN → ηN reaction cross-sections near the threshold and the S-wave η-N scattering length are calculated and compared with the experimental data and other theoretical calculations.
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Original research articles, Ietters and reviews Covering theory and experiments in the fieids of
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