1999 Vol. 23, No. 1
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Abstract:
Using hadronic events sample collected around 3.55 GeV with Beijing Spectrometer (BES) at Beijing Electron Positron Collider (BEPC) and the published data, we studied distributions characterizing the hadronic events produced from the e+e－ annihilatio...
Using hadronic events sample collected around 3.55 GeV with Beijing Spectrometer (BES) at Beijing Electron Positron Collider (BEPC) and the published data, we studied distributions characterizing the hadronic events produced from the e+e－ annihilatio...
Abstract:
The structure function of τ→π±2π0v is measured by model independent method. The result is compared with Kuhn-Santamaria model, Isgur-Morningstar-Reader model and Feindt model. Good consistency between data and the three models is shown within the exp...
The structure function of τ→π±2π0v is measured by model independent method. The result is compared with Kuhn-Santamaria model, Isgur-Morningstar-Reader model and Feindt model. Good consistency between data and the three models is shown within the exp...
Abstract:
The production mechanism of ring-like events has been investigated by using the data of pseudorapidity distribution of charged particles produced in pp collisions at 400GeV/c. The results show that the model of coherent gluon emission within a finite...
The production mechanism of ring-like events has been investigated by using the data of pseudorapidity distribution of charged particles produced in pp collisions at 400GeV/c. The results show that the model of coherent gluon emission within a finite...
Abstract:
A search for 10Tev γ-ray continuous emission from 58 Supernova Remnants which include Crab Nebula and 25 Active Galactic Nuclei which include Mrk421 and Mrk501 with the data of Tibet I air shower array from 1990 June to 1993 October is executed by th...
A search for 10Tev γ-ray continuous emission from 58 Supernova Remnants which include Crab Nebula and 25 Active Galactic Nuclei which include Mrk421 and Mrk501 with the data of Tibet I air shower array from 1990 June to 1993 October is executed by th...
Abstract:
Data taken with ACT2 and ACT3 betWeen 1995 and 1997 are used to search for 0.1 second bursts of TeV gamma Rays from evaporating Primordial Black Holes (PBHs). There is no evidence for such bursts in the dataset. Using the result,the upper limit of 3 ...
Data taken with ACT2 and ACT3 betWeen 1995 and 1997 are used to search for 0.1 second bursts of TeV gamma Rays from evaporating Primordial Black Holes (PBHs). There is no evidence for such bursts in the dataset. Using the result,the upper limit of 3 ...
Abstract:
Interaction time ～4.3×10－21s of the dissipative products in the collision 27Al+27Al is extracted from the measurement of excitation functions by using the developed Ericson statistical theory.
Interaction time ～4.3×10－21s of the dissipative products in the collision 27Al+27Al is extracted from the measurement of excitation functions by using the developed Ericson statistical theory.
Abstract:
The multiparticle Bose-Einstein correlations for formation of quark-gloun plasma (QGP) in high energy heavy ion collisions are analysed. Investigating the average correlation intensities of multipions as a function of pion multiplicity indicats that ...
The multiparticle Bose-Einstein correlations for formation of quark-gloun plasma (QGP) in high energy heavy ion collisions are analysed. Investigating the average correlation intensities of multipions as a function of pion multiplicity indicats that ...
Abstract:
Splitting of a hot nucleus into three comparable pieces in the 40Ar+159Tb reaction at 30MeV/u was measured. For the splitting there are two modes: one is a successive binary process, such as sequential fission or a cascade fission, another is a promp...
Splitting of a hot nucleus into three comparable pieces in the 40Ar+159Tb reaction at 30MeV/u was measured. For the splitting there are two modes: one is a successive binary process, such as sequential fission or a cascade fission, another is a promp...
Abstract:
Within the O(6) limit of s-d IBM1, the effective three-body potential between the interactions of d-bosons is introduced with the consideration of octupole states, which are produced by a f-boson plus (N-1) s-d-bosons. Then the analytic expressions o...
Within the O(6) limit of s-d IBM1, the effective three-body potential between the interactions of d-bosons is introduced with the consideration of octupole states, which are produced by a f-boson plus (N-1) s-d-bosons. Then the analytic expressions o...
Abstract:
In this paper, we study the behavior of high intense beams in the periodic filed by using thin lens approximation for the space-charge forces. The main chaotic behavior and halo formation can be shown through simple calculations. Meanwhile, it is ver...
In this paper, we study the behavior of high intense beams in the periodic filed by using thin lens approximation for the space-charge forces. The main chaotic behavior and halo formation can be shown through simple calculations. Meanwhile, it is ver...
Abstract:
The operation of colliders are often limited by the nonlinear effects of beam-beam interaction, especially for the strong current machines, such as BEPCⅡ (BEPC multibunch collision scheme). The beam-beam interaction in BEPCⅡ is very complicated. The ...
The operation of colliders are often limited by the nonlinear effects of beam-beam interaction, especially for the strong current machines, such as BEPCⅡ (BEPC multibunch collision scheme). The beam-beam interaction in BEPCⅡ is very complicated. The ...
Abstract:
We consider the mass dependence on the mixing between a pure glueball and a normal qq meson in QCD sum rules. In the normal correlation functions, the gluonic current and qq current are assumed to couple to both glueball and qq states. By using the l...
We consider the mass dependence on the mixing between a pure glueball and a normal qq meson in QCD sum rules. In the normal correlation functions, the gluonic current and qq current are assumed to couple to both glueball and qq states. By using the l...
Abstract:
The oscillatory behavior of H moments obtained from the experimental data in pp and pp collisions is studied in the Three-Fireball Model (TFM). It is found that similar to that in the negtive binomial distribution (NBD), the H moment in the full TFM ...
The oscillatory behavior of H moments obtained from the experimental data in pp and pp collisions is studied in the Three-Fireball Model (TFM). It is found that similar to that in the negtive binomial distribution (NBD), the H moment in the full TFM ...
Abstract:
A new nuclide 238Th has been produced via multinucleon transfer reaction induced by 60MeV/u 18O ion irradiation of natural uranium. The thorium was radiochemically separated from the mixture of uranium and its reaction products. The activity of thori...
A new nuclide 238Th has been produced via multinucleon transfer reaction induced by 60MeV/u 18O ion irradiation of natural uranium. The thorium was radiochemically separated from the mixture of uranium and its reaction products. The activity of thori...
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