首页> 外文期刊>Physical review, C >Lambda N-c interaction in leading-order covariant chiral effective field theory
【24h】

Lambda N-c interaction in leading-order covariant chiral effective field theory

机译:领导协调性手套有效现场理论中的Lambda N-C互动

获取原文
获取原文并翻译 | 示例
           

摘要

We study the Lambda N-c interaction in the covariant chiral effective field theory (ChEFT) at leading order. All the relevant low-energy constants are determined by fitting to the lattice QCD simulations from the HAL QCD Collaboration. Extrapolating the results to the physical point, we show that the Lambda N-c interaction is weakly attractive in the S-1(0) channel, but in the S-3(1) channel it is only attractive at extremely low energies and soon turns repulsive for larger laboratory energy. Furthermore, we show that the neglect of the S-3(1)-D-3(1) coupling provided by the leading-order covariant ChEFT would result in an attractive interaction in the S-3(1) channel at the physical point, which coincides with the previous nonrelativistic ChEFT study. As a byproduct, we predict the D-3(1) phase shifts and the mixing angel epsilon(1), which can be checked by future lattice QCD simulations. In addition, we compare the Lambda N-c interaction with the Lambda N and NN interactions to study how the baryon-nucleon (BN) interactions evolve as a function of the baryon mass with the replacement of a light quark by a strange or charm quark in the baryon (B).
机译:我们研究了前导阶协变手征有效场理论(ChEFT)中的Lambda N-c相互作用。所有相关的低能常数都是通过拟合HAL QCD合作的晶格QCD模拟确定的。将结果外推到物理点,我们表明Lambda N-c相互作用在S-1(0)通道中是弱吸引的,但在S-3(1)通道中,它仅在极低的能量下是吸引的,并且很快在较大的实验室能量下变成排斥的。此外,我们还表明,忽略前导阶协变ChEFT提供的S-3(1)-D-3(1)耦合将导致S-3(1)通道在物理点处产生吸引的相互作用,这与之前的非相对论ChEFT研究一致。作为副产品,我们预测了D-3(1)相移和混合角ε(1),这可以通过未来的晶格QCD模拟进行检验。此外,我们还比较了Lambda N-c相互作用与Lambda N和NN相互作用,以研究重子-核子(BN)相互作用如何随着重子(B)中的奇异夸克或魅力夸克取代轻夸克而演化为重子质量的函数。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号