# 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} }

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

### Theoretical analysis on the K − 3 He → Λ pn reaction for the K̄NN bound-state search in the J-PARC E 15 experiment

- Physics
- 2017

We theoretically analyze the K−3He → Λpn reaction for the K̄NN bound-state search in the JPARC E15 experiment. We find that, by detecting a fast and forward neutron in the final state, an almost…

### Further Theoretical Analysis on the \(K^{ - 3}\text{He} \to \Lambda pn\) Reaction for the \(\bar{K}NN\) Bound-State Search in the J-PARC E15 Experiment

- PhysicsProceedings of the 8th International Conference on Quarks and Nuclear Physics (QNP2018)
- 2019

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…