• DOI:10.5506/APhysPolB.48.1869
• Corpus ID: 104169519

What makes the peak structure of the $\Lambda p$ invariant-mass spectrum in the $K^{-} {}^{3} {\rm He} \to \Lambda p n$ reaction?

@article{Sekihara2017WhatMT,
  title={What makes the peak structure of the \$\Lambda p\$ invariant-mass spectrum in the \$K^\{-\} \{\}^\{3\} \{\rm He\} \to \Lambda p n\$ reaction?},
  author={Takayasu Sekihara and Eulogio Oset and {\`A}ngels Ramos},
  journal={arXiv: Nuclear Theory},
  year={2017}
}

• T. Sekihara, E. Oset, À. Ramos
• Published 21 September 2017
• Physics
• arXiv: Nuclear Theory

Recently a peak structure was observed near the $K^{-} p p$ threshold in the in-flight ${}^{3} {\rm He} (K^{-} , \, \Lambda p) n$ reaction of the E15 experiment at J-PARC, which could be a signal of a $\bar{K} N N$ bound state. In order to investigate what is the origin of this peak, we calculate the cross section of this reaction, in particular based on the scenario that the $\bar{K} N N$ bound state is indeed generated and decays into $\Lambda p$. We find that the numerical result of the $\Lambda p$ invariant-mass spectrum in the $\bar{K} N N$ bound scenario is consistent with the J-PARC E15 data.