Experimental Study of Hadron Inclusive Production in J/ψ Region

  • The mean multiplicities of mesons π±、π0、K±、K0s、ρ0.K*0、K、φ and baryons p、Ξ±、Σ±(1385) are measured for the first time in J/ψ region with 200,000 J/ψ events collected by the BES detector. The results are compatible with LUND and Shandong phenomenological models. Based on the experimental results, the strangeness suppression factor s/u and spin suppression factor V/(V+P) are calculated to be ~0.3 and ~0.3—0.5 respectively, in good agreement with those given by ARGUS Collaboration in region. This indicates that the SU(6) breaking is consistent in the energy region from J/ψ to .
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  • [1] K Albrecht et al. (ARGUS), Z . Phys., C39(1988) 177; C41(1989) 557; C44(1989) 547; C46(1990) 15; H. Albrecht et al.(ARGUS), Phys.Lett., 236B(1990)102; 230B(3989)349; 215B(1988)429.[2]P.Avery et al., Phys. Rev., D43(1991) 3599; P. Avery et al., Phys. Rev., D31(1985)2161.[3]Alessandro De Angelis CERN PPE/93-35(1993); ALEPH note (PHYSIC 92-107).[4]Wegner Hofmann, Ann. Rev. Nucl. Part. Sci., 38(1988)279.[5]W. Braunschweig et al., Phys. Lett., B63(1976) 115.[6]R Baldini-celio et al., Phys. Lett., B58(1975)471.[7]B. Anderson et al., Phys. Rep., 97(1983)31;X. Artru, Phys. Rep., 97(1983)147; A.Casher, H. Neuberger, S. Nussinov, Phys. Rev., D20(1979)179; D21(1980)1966.[8]田丽丽、谢去病,高能物理与核物理,17(1993)885.[9]Lili Tian et al.,phys.Rev.,D49(1994)4517:Qu-bing Xie et al.,Phys.Rev.,D38(1988)2169.[10]J. Z. Baietal., Nucl.Inst.Meth.,A344(1994)319:白景芝等,高能物理与核物理,16(1992)769.[11]白景芝等,高能物理与核物理,19(1995)673.[12]赵昕,J/ψ能区强子单举产生的实验研究,博士论文,山东大学,1996.[13]苑长征,由(2S)→J/π+π-J/ψ道测量J/ψ轻子道衰变分支比,硕士论文,高能物理研究所,1993.[14]方伟贞,(2S)共振多数的测量,硕士论文,高能物理研究所,1995.[15]余志堂,J/衰变中强子产生的研究,硕士论文,高能物理研究所,1995.[16]许榕生、张学尧、李群,共振峰拟合,BES内部报告,1990.
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BES Collaborations. Experimental Study of Hadron Inclusive Production in J/ψ Region[J]. Chinese Physics C, 1997, 21(11): 961-969.
BES Collaborations. Experimental Study of Hadron Inclusive Production in J/ψ Region[J]. Chinese Physics C, 1997, 21(11): 961-969. shu
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Received: 1900-01-01
Revised: 1900-01-01
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Experimental Study of Hadron Inclusive Production in J/ψ Region

  • Institute of High Energy Physics,The Chinese Academy of Sciences,Beijing 100039

Abstract: The mean multiplicities of mesons π±、π0、K±、K0s、ρ0.K*0、K、φ and baryons p、Ξ±、Σ±(1385) are measured for the first time in J/ψ region with 200,000 J/ψ events collected by the BES detector. The results are compatible with LUND and Shandong phenomenological models. Based on the experimental results, the strangeness suppression factor s/u and spin suppression factor V/(V+P) are calculated to be ~0.3 and ~0.3—0.5 respectively, in good agreement with those given by ARGUS Collaboration in region. This indicates that the SU(6) breaking is consistent in the energy region from J/ψ to .

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