/ Experiment-HEP hep-ex/0403044

Observation of S = +1 narrow resonances in the system K0(s)p from p + C(3)H(8) collision at 10-GeV/c

Aslanyan, P.Zh. (Yerevan State U.) ; Emelyanenko, V.N. (Dubna, JINR) ; Rikhkvitzkaya, G.G. (Dubna, JINR)

Published in: Nucl.Phys.
Year: 2005
Vol.: A755
Page No: 375-378
Pages: 8

Abstract: The 2m propane bubble chamber experimental data have been analyzed to search for an exotic baryon state, the $\Theta^+$ -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 $\Gamma_{K_s^0 p}$= 9.2$\pm$1.8, 16.1$\pm$4.1, 28.0$\pm$9.4 MeV/$c^2$. The maximal statistical significance of these peaks have been estimated as 5.5$\sigma$,4.8$\sigma$ and 5.0$\sigma$, respectively.

Web-Page: http://dx.doi.org/10.1016/j.nuclphysa.2005.03.041

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