Observation of S=+1 narrow resonances in the system $K^0_sp$ from p+$C_3H_8$ collision at 10 GeV/c

P. Zh. Aslanyan; V. N. Emelyanenko; G. G. Rikhkvitzkaya

doi:10.1016/j.nuclphysa.2005.03.041

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arXiv · hep-ex/0403044

Observation of S=+1 narrow resonances in the system $K^0_sp$ from p+$C_3H_8$ collision at 10 GeV/c

P. Zh. Aslanyan·V. N. Emelyanenko·G. G. Rikhkvitzkaya

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Abstract

The 2m propane bubble chamber experimental data have been analyzed to search for an exotic baryon state, the $Θ^+$ -baryon, in the $pK^0_s$ decay mode for the reaction p+$C_3H_8$ at 10 GeV/c. The $pK^0_s$ invariant mass spectrum shows resonant structures with $M_{K_s^0 p}$=1540$\pm$8, 1613$\pm$10, 1821$\pm$11 MeV/$c^2$ and $Γ_{K_s^0 p}$= 9.2$\pm$1.8, 16.1$\pm$4.1, 28.0$\pm$9.4 MeV/$c^2$. The maximal statistical significance of these peaks have been estimated as 5.5$σ$,4.8$σ$ and 5.0$σ$, respectively.

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P. Zh. Aslanyan, V. N. Emelyanenko, G. G. Rikhkvitzkaya. 2004-06-28. Observation of S=+1 narrow resonances in the system $K^0_sp$ from p+$C_3H_8$ collision at 10 GeV/c. https://doi.org/10.1016/j.nuclphysa.2005.03.041

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