2010 Vol. 34, No. 8

Particle and field theory
Feasibility study on cross-section measurement of Υ(1S)→μ+μ by using early CMS data
GUO Shuang, HU Zhen, QIAN Si-Jin, YANG Zong-Chang, LIU Lie
2010, 34(8): 1037-1044. doi: 10.1088/1674-1137/34/8/001
Abstract:

One of the first physics results that CMS will hopefully obtain will be the analysis of heavy quarkonium productions, including the Υ cross-section measurement. Since the Υ production cross-section from p-p collisions is expected to be relatively lar...

Combined fit to BABAR and Belle Data on e+e→φπ+π and φf0(980)
SHEN Cheng-Ping, YUAN Chang-Zheng
2010, 34(8): 1045-1051. doi: 10.1088/1674-1137/34/8/002
Abstract:

A combined fit is performed to the BABAR and Belle measurements of the e+e→φπ+π and φf0(980) cross sections for center-of-mass energy between threshold and 3.0 GeV. The resonance parameters of the φ(1680) and Y(2175) are determined. The mass is (16...

Dynamical study of the possible molecular state X(3872) with the s-channel one gluon exchange interaction
WANG Bao-Kai, DENG Wei-Zhen, CHEN Xiao-Lin
2010, 34(8): 1052-1056. doi: 10.1088/1674-1137/34/8/003
Abstract:

The recently observed X(3872) resonance, which is difficult to assign a conventional cc charmonium state in the quark model, may be interpreted as a molecular state. Such a molecular state is a hidden flavor four quark state because of its charmonium...

Associated production of a neutral top-Higgs with a heavy-quark pair in the γγ collisions at ILC
HUANG Jin-Shu, LU Gong-Ru, XU Wei, WANG Shuai-Wei
2010, 34(8): 1057-1060. doi: 10.1088/1674-1137/34/8/004
Abstract:

We have studied the associated production processes of a neutral top-Higgs in the topcolor assisted technicolor model with a pair of heavy quarks in γγ collisions at the International Linear Collider (ILC). We find that the cross section for ttht in ...

Partial wave analysis of ψ′→γχc0→γpKΛ used for searching for baryon resonance
KANG Xian-Wei, LI Hai-Bo, LU Gong-Ru, ZOU Bing-Song
2010, 34(8): 1061-1068. doi: 10.1088/1674-1137/34/8/005
Abstract:
Abundant ψ′ events have been collected at the Beijing Electron Positron Collider-Ⅱ (BEPCⅡ) that could undoubtedly provide us with a great opportunity to study the more attractive charmonium decays. As has been noticed before, in the process of J/ψ de...
On two-point boundary correlations of the gl(1|1) supersymmetric vertex model
ZHANG Chen-Jun
2010, 34(8): 1069-1075. doi: 10.1088/1674-1137/34/8/006
Abstract:

The gl(1|1) supersymmetric vertex model with domain wall boundary conditions (DWBC) on an N×N square lattice is considered. We obtain the reduction formulae for the two-point boundary correlation functions of the model.

Nuclear and ion Physics
Central nucleus-nucleus collisions at relativistic energies with a new method based on Random Matrix Theory
R. G. Nazmitdinov, E. I. Shahaliev, M. K. Suleymanov
2010, 34(8): 1076-1081. doi: 10.1088/1674-1137/34/8/007
Abstract:

Using the method based on Random Matrix Theory (RMT), the results for the nearest-neighbor distributions obtained from the experimental data on 12C-C collisions at
4.2 AGeV/c have been discussed and compared with the simulated data on 12C-C collisions...

Properties of the β-delayed proton decay of 146Ho
MA Fei, ZHOU Xiao-Hong, ZHENG Yong, XU Shu-Wei, XIE Yuan-Xiang, CHEN Liang, LEI Xiang-Guo, GUO Ying-Xiang, ZHANG Yu-Hu, LI Zhan-Kui, GUO Song, DING Bing, ZHOU Hou-Bing, LI Guang-Shun, WANG Hai-Xia
2010, 34(8): 1082-1084. doi: 10.1088/1674-1137/34/8/008
Abstract:

The proton-rich isotope 146Ho was produced via the fusion-evaporation reaction 92Mo (58Ni, 3p1n). The β-delayed proton decay of 146Ho was studied by proton-γ coincidence measurements using a He-jet tape transport system. The γ-transitions in 145Tb fo...

Rapidity distributions of net protons from AGS to LHC energy regions
ZHONG Yang, FENG Sheng-Qin
2010, 34(8): 1085-1089. doi: 10.1088/1674-1137/34/8/009
Abstract:

Taking the conservation of baryon number into account in a non-uniform flow model, the rapidity distribution of the net protons at the LHC is predicted. The energy dependence of the rapidity distribution, baryon stopping and collective flow from BNL/...

Influence of super-strong magnetic field on the electron chemical potential and β decay in the stellar surroundings
LIU Wei-Wei, LUO Zhi-Quan, ZHANG Jie, GAO Jie, BIAN Gang
2010, 34(8): 1090-1093. doi: 10.1088/1674-1137/34/8/010
Abstract:

In this paper, considering the quantum effect of electrons in a super-strong magnetic field, the influence of a super-strong magnetic field on the chemical potential of a non-zero temperature electron is analyzed, the rates of β decay under the super...

Octupole deformation for Ba isotopes in a reflection-asymmetric relativistic mean-field approach
ZHANG Wei, LI Zhi-Pan, ZHANG Shuang-Quan
2010, 34(8): 1094-1099. doi: 10.1088/1674-1137/34/8/011
Abstract:

The potential energy surfaces of even-even 142—156Ba are investigated in the constrained reflection-asymmetric relativistic mean-field approach with parameter set PK1. It is shown that for the ground states, 142Ba is near spherical, 156Ba well quadru...

Experiment of constraining symmetry energy at supra-saturation density with π+ at HIRFL-CSR
ZHANG Ming, XIAO Zhi-Gang, ZHU Sheng-Jiang
2010, 34(8): 1100-1103. doi: 10.1088/1674-1137/34/8/012
Abstract:

The possibility of the experiment for constraining the symmetry energy Esym(ρ) at supra-densities via π+ probe on the external target experiment of phase I ( ETE(I) ) with part coverage at forward angle at HIRFL-CSR is studied for the first time b...

Centrality dependences of the pseudorapidity distributions of charged particles in Au+Au collisions at RHIC energies
JIANG Zhi-Jin, SUN Yu-Fen, NI Wei-Xin
2010, 34(8): 1104-1110. doi: 10.1088/1674-1137/34/8/013
Abstract:

By employing the Glauber model, we give the centrality dependences of the numbers of participants and binary nucleon-nucleon collisions in nucleus-nucleus collisions. By taking into account the energy loss of the participants in their multiple collis...

Detection Technology and Methods
Characteristics of the sampling paddle modules of neutron wall from the cosmic ray test
YUE Ke, YU Yu-Hong, XU Hu-Shan, SUN Zhi-Yu, WANG Jian-Song, XIAO Zhi-Gang, HU Zheng-Guo, CHEN Ruo-Fu, ZHANG Xue-Ying, TU Xiao-Lin, CHEN Jun-Ling, ZHAN Wen-Long
2010, 34(8): 1111-1115. doi: 10.1088/1674-1137/34/8/014
Abstract:

In the construction of a large area neutron detector (neutron wall) that is used to detect neutrons at GeV energies, the performances of all the sampling paddle modules prepared for the neutron wall are investigated with a specially designed test ben...

Study of RPC gas composition using Daya Bay RPCs
MA Lie-Hua, WANG Yi-Fang, ZHANG Jia-Wen, Logan Lebanowski, Viktor Pec, XU Guang-Hua, CHEN Jin, XIE Yu-Guang, HAN Ji-Feng, ZHANG Qing-Min, QIAN Sen, NING Zhe
2010, 34(8): 1116-1121. doi: 10.1088/1674-1137/34/8/015
Abstract:

This study uses Daya Bay RPCs operating in streamer mode to investigate gas mixtures of at least 50% argon, at most 6% isobutane, and with small amounts of SF6. Isobutane is reduced to 2% without degradation of performance, and SF6 reduces the noise ...

Accelerator
Study on the pre-chopper in CSNS LEBT
OUYANG Hua-Fu, ZHANG Hua-Sun, GONG Ke-Yun, LIU Hua-Chang, WU Xiao-Bing
2010, 34(8): 1122-1126. doi: 10.1088/1674-1137/34/8/016
Abstract:

Physical designing of the pre-chopper in CSNS LEBT is carried out, which includes the deflecting voltage, the length and the width of the deflecting plates, and the gap between the deflecting plates. The most outstanding feature of the design is that...

Development of a ferroelectric cathode diode
LI Ruo-Yun, ZHENG Shu-Xin, TANG Chuan-Xiang
2010, 34(8): 1127-1131. doi: 10.1088/1674-1137/34/8/017
Abstract:

As a promising kind of high current cold cathode, the Ferroelectric Cathode (FEC) has several significant advantages, such as a controllable trigger time, lower vacuum requirement and large emitting area fabricability. The emitting current density of...

An untuned MA-loaded cavity for HIRFL-CSR
MEI Li-Rong, XU Zhe, YUAN You-Jin, ZHANG Sheng-Hu, ZHANG Zhou-Li, ZHANG Cong, SUN Lie-Peng, JIN Peng, YUE Wei-Ming
2010, 34(8): 1132-1135. doi: 10.1088/1674-1137/34/8/018
Abstract:

In order to realize high energy density physics and plasma physics research at HIRFL-CSR, a magnetic alloy (MA)-loaded cavity has been studied. According to the theoretical calculation and simulation for the MA-loaded cavity, we achieved a better res...

PIC mode simulation of solenoid collimation channel
XIAO Chen, YUAN You-Jin, HE Yuan, LIU Yong, XIA Jia-Wen
2010, 34(8): 1136-1139. doi: 10.1088/1674-1137/34/8/019
Abstract:

A new SSC (Separated Sector Cyclotron)-Linac is being designed to serve as an injector for
the SSC at the HIRFL (Heavy Ion Research Facility Lanzhou). The beam intensity at the LEBT
(Low Energy Beam Transport) for the heavy ions after the selection is ...

Synchrotron radiation,applications of nuclear techniquees,etc
Ultra-high order harmonic generation via a free electron laser mechanism
DENG Hai-Xiao, DAI Zhi-Min
2010, 34(8): 1140-1147. doi: 10.1088/1674-1137/34/8/020
Abstract:

In this paper, by using the ``frequency up-conversion'' principle with a high gain harmonic generation free electron laser and an external seed laser, we consider the possibility of modulating a relativistic electron beam on the attosecond scale, so ...

Investigation of high resolution compact gamma camera module based on a continuous scintillation crystal using a novel charge division readout method
DAI Qiu-Sheng, ZHAO Cui-Lan, ZHANG Hua-Lin, QI Yu-Jin
2010, 34(8): 1148-1152. doi: 10.1088/1674-1137/34/8/021
Abstract:

The objective of this study is to investigate a high performance and lower cost compact gamma camera module for a multi-head small animal SPECT system. A compact camera module was developed using a thin Lutetium Oxyorthosilicate (LSO) scintillation c...

ISSN 1674-1137 CN 11-5641/O4

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