Experimental Study of Hadron Inclusive Production in J/ψ Region

BES Collaborations

Chinese Physics C> 1997, Vol. 21> Issue(11) : 961-969

Experimental Study of Hadron Inclusive Production in J/ψ Region

BES Collaborations

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

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Abstract：
The mean multiplicities of mesons π^±、π⁰、K^±、K⁰_s、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 .

References

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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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沈阳化工大学材料科学与工程学院沈阳 110142

Experimental Study of Hadron Inclusive Production in J/ψ Region

BES Collaborations

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

Received Date: 1900-01-01
Accepted Date: 1900-01-01
Available Online: 1997-11-05

Abstract: The mean multiplicities of mesons π^±、π⁰、K^±、K⁰_s、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 .