# 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}
}`
• 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…
2 Citations

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We theoretically analyze the $K^{-} {}^{3} \text{He} \to \Lambda p n$ reaction for the $\bar{K} N N$ bound-state search in the J-PARC E15 experiment. We find that, by detecting a fast and forward