Various flows of black and grey particles produced in Mg-emulsion collisions at 4.5 A GeV/c

作     者：高雁 刘福虎 N.N.Abd Allah R.Bekmirzaev 

作者机构：Department of PhysicsXinzhou Normal University Institute of Theoretical PhysicsShanxi University Department of PhysicsFaculty of ScienceSohag UniversitySohagEgypt Nuclear Physics DepartmentDjizak State Pedagogical InstituteDjizzak 708000Uzbekistan 

出 版 物：《Chinese Physics C》 (中国物理C（英文版）)

年 卷 期：2011年第35卷第1期

页      面：40-43页

核心收录：

学科分类：08[工学] 0827[工学-核科学与技术] 082701[工学-核能科学与工程] 

基　　金：Supported by National Natural Science Foundation of China (10975095,10675077) Natural Science Foundation of Shanxi Province (2007011005) 

主　　题：various flows absolute flows b- and g-particles Mg-Em collisions 

摘      要：Various flow phenomena of black particles （b-particles） and grey particles （g-particles） produced in magnesium-emulsion （Mg-Em） collisions at 4.5 A GeV/c are reported. These flows are directed and elliptic transverse flows （v1 and v2） related by the azimuthal angle （φ）, directed and elliptic reaction plane flows （vR1 and vR2） related by the projected angle （φ） on the reaction plane, and directed and elliptic polar direction flows （vp1 and vp2） related by the polar angle （ ）. We extract absolute flows as the direct experimental values minus the isotropic theoretical values. The dependence of the various flows on the target particle multiplicity and on the angles （ ,φ,φ） is investigated. Our results show that the dependence of b-particle flows on the target size is obvious and for heavy targets the dependence on target particle multiplicity is slight. Compared with b-particles, g-particles have a slight dependence on the target size and target particle multiplicity.