Role of the Λ(1600) in the K^-p→Λπ^0π^0 reaction |
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作者姓名: | He Zhou Ju-Jun Xie |
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作者单位: | Institute of Modern Physics;School of Nuclear Science and Technology;School of Physics and Microelectronics |
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基金项目: | partly supported by the National Natural Science Foundation of China under Grant Nos.11735003,1191101015 and 11475227;the Youth Innovation Promotion Association CAS(No.2016367). |
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摘 要: | Role of theΛ(1600)is studied in the K^-p→Λπ^0π^0 reaction by using the effective Lagrangian approach near the threshold.We perform a calculation for the total and differential cross sections by considering the contributions from theΛ(1600)andΛ(1670)intermediate resonances decaying intoπ^0∑^*0(1385)with∑^*0(1385)decaying intoπ^0Λ.Additionally,the non-resonance process from u-channel nucleon pole is also taken into account.With our model parameters,the current experimental data on the total cross sections of the K^-p→Λπ^0π^0 reaction can be well reproduced.It is shown that we really need the contribution from the A(1600)with spin-parity J^P=1/2^+,and that these measurements can be used to determine some of the properties of theΛ(1600)resonance.Furthermore,we also plot theπ0Λinvariant mass distributions which could be tested by the future experimental measurements.
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关 键 词: | KN SCATTERING effective LAGRANGIAN approach HYPERON RESONANCE |
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