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S =-1 meson-baryon interaction and the role of isospin filtering processes

机译:s = -1 meson-baryon相互作用和isospin滤波过程的作用

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摘要

A study of the meson-baryon interaction in the S = -1 sector is performed, employing a chiral SU(3) Lagrangian up to next-to-leading order (NLO) and implementing unitarization in coupled channels. The model is constrained by a large set of experimental data, paying special attention to processes that are sensitive to the NLO contributions, such as the K(-)p -> K+Xi(-), K-0 Xi(0) reactions. The consideration of additional cross sections in single isospin channels, K(-)p -> eta Lambda, eta Sigma, has been found to provide NLO low-energy constants of rather similar size. The stability of these constants has also been tested by the inclusion of explicit resonant terms. Predictions for new isospin filtering processes, like the I = 1K(L)(0)p -> K+Xi(0) reaction that could be measured at the proposed secondary K-L(0) beam at Jlab, or the weak decay of the Lambda(b) into a J/Psi and different meson-baryon pairs in I = 0, available at LHCb, are presented. The measurement of such reactions would put valuable constraints on the chiral models describing the S = -1 meson-baryon interaction.
机译:对S = -1扇区中的Meson-Baryon相互作用进行研究,采用手性SU(3)拉格朗日直到下一阶(NLO)并在耦合通道中实施单位化。该模型受大量实验数据约束,特别注意对NLO贡献敏感的过程,例如K( - )p - > K + Xi( - ),K-0 Xi(0)反应。已经发现已经考虑了单一旋流通道,K( - )P - > Eta Lambda,Eta Sigma的额外横截面,以提供相当相似的NLO低能量常数。这些常数的稳定性也通过包含明确的共振术语来测试。用于新的索波孔过滤过程的预测,如I = 1K(l)(0)p - > k + xi(0)反应,其可以在Jlab的所提出的二级KL(0)梁上测量,或者弱衰减LHCB提供的LHCB中可用的λ(b)在i = 0中的j / psi和不同的meson-baryon对中。这种反应的测量将对描述S = -1 meson-Baryon相互作用的手性模型中的有价值的限制。

著录项

  • 来源
    《Physical review, C》 |2019年第3期|共18页
  • 作者

    Feijoo A.; Magas V; Ramos A.;

  • 作者单位

    Nucl Phys Inst Rez 25068 Czech Republic;

    Univ Barcelona Dept Fis Quant &

    Astrofis Marti Franques 1 E-08028 Barcelona Spain;

    Univ Barcelona Dept Fis Quant &

    Astrofis Marti Franques 1 E-08028 Barcelona Spain;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 原子核物理学、高能物理学;
  • 关键词

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