Gluon Exchange Potential and Cross-Section for pp→ΛΛ Proce

  • One and two-gluon exchange potentials (OGEP and TGEP) relevant to the pp→ΛΛ transition process are derived from the S-matrix in the a roximation of order p2/m2. An effective transition potential obtained from these gluon exchange potentials by the constituent quark model is employed to calculate the differential and total cross-sections for the pp→ΛΛ reaction in the plane wave Born Approximation.The calculated result shows that the relativistic correction terms in the OGEP and TGEP give considerable improvements on the cross-section in comparison with the previous calculations performed by making use of the OGEP given in the extremely non-relativistic a roximation.
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  • [1] F.Tabakin and R.A.Eisenstein,Phys.Rev.,C31(1985)1857.[2]M.Kohno and W.Weise,Phys.Lett.,B179(1986)15.[3]M.Kohno and W.Weise,Nucl.Phys.,A479(1988)433.[4]M.A.Alberg et al.,Nucl.Phys.,A508(1990)323.[5]苏君辰,王秀江,朱耀银,《高能物理与核物理》,16(1986)40.[6]苏君辰,吴式枢,ChinesePhysics,8(1988)978.[7]苏君辰,陈佐群,吴式枢,Nucl.Phys.,A524(1991)615.[8]P.D.Barnes et al,Phys.Lett,B189(1987)249.[9]M.Burdardt and M.Dilling,Phys.Rev.,C37(1988)1362.
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Yang Yi, Yu Jianzhong, Zou Yongqing and Su Junchen. Gluon Exchange Potential and Cross-Section for pp→ΛΛ Proce[J]. Chinese Physics C, 1994, 18(1): 85-90.
Yang Yi, Yu Jianzhong, Zou Yongqing and Su Junchen. Gluon Exchange Potential and Cross-Section for pp→ΛΛ Proce[J]. Chinese Physics C, 1994, 18(1): 85-90. shu
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Received: 1900-01-01
Revised: 1900-01-01
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Gluon Exchange Potential and Cross-Section for pp→ΛΛ Proce

    Corresponding author: Yang Yi,
  • Department of Physics, Jilin University, Changchun, 130023

Abstract: One and two-gluon exchange potentials (OGEP and TGEP) relevant to the pp→ΛΛ transition process are derived from the S-matrix in the a roximation of order p2/m2. An effective transition potential obtained from these gluon exchange potentials by the constituent quark model is employed to calculate the differential and total cross-sections for the pp→ΛΛ reaction in the plane wave Born Approximation.The calculated result shows that the relativistic correction terms in the OGEP and TGEP give considerable improvements on the cross-section in comparison with the previous calculations performed by making use of the OGEP given in the extremely non-relativistic a roximation.

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