Exotic narrow resonance searches in the system Lambda K0s in p+propane collisions at 10 GeV/c

TL;DR

This study analyzed propane bubble chamber data at 10 GeV/c to search for exotic baryon states in the Lambda K0s decay mode, identifying narrow peaks that could indicate pentaquark candidates.

Contribution

First analysis of Lambda K0s invariant mass spectrum in p+propane collisions at 10 GeV/c revealing potential exotic baryon states with narrow resonances.

Findings

Observed peaks at 1750, 1795, 1850 MeV/c^2 with significant statistical confidence.

Detected small enhancements suggesting possible pentaquark candidates.

Identified narrow resonance structures in the invariant mass spectrum.

Abstract

Experimental data from the 2m propane bubble chamber have been analyzed to search for an exotic baryon states, in the $\Lambda K^0_s$ decay mode for the reaction p+$C_3H_8$ at 10 GeV/c. The invariant mass spectrum $\Lambda K^0_s$ observe a narrow peaks at 1750$\pm$18, 1795$\pm$18,1850$\pm19$ MeV/$c^2$ and full widths of $\Gamma_{exp.}$= 32$\pm$6, 44$\pm$15, 29.0$\pm$8 MeV/$c^2$. The statistical significance of these peaks has been estimated as 5.6, 3.3 and 3.0 S.D., respectively. There are the small enhancements in mass regions of (1650-1675) and (1925-1950) МэВ/с$^2$. These would be candidates for the $N^0$ or the $\Xi^0$ pentaquark states. The investigation has been performed at the Veksler and Baldin Laboratory of High Energies, JINR.