arXiv subjects

V. N. Emelyanenko

Publications and source records attributed to V. N. Emelyanenko.

6 recordsLinked to original sources

arXiv2008

Searches for Multibaryon States with $Λ$ Hyperon Systems in pa Collision at 10 Gev/c

Experimental data as a stereo photographs from the 2m propane bubble chamber LHE, JINR have been analyzed for exotic multibaryon metastable and stable states searches. A number of peculiarities were found in the effective mass spectra of: 1)$Λπ^{\pm}$,$Λπ^+ π^-$, $Λp$, $Λp p$, $Λπp$,$ΛΛ$ and $ΛK^0_S$ subsystems. The observed well known $Σ^{*+}$(1385),$Λ^*(1600)$ and $K^{*\pm}$(892)resonances are good tests for this method. The width of $Σ^{*-}(1385)$ for p+A reaction is two time larger than that presented in PDG. The $Λπ^-$ spectrum observed enhancement in mass range of 1345 MeV/$c^2$ which interpreted as a stopped in nucleus $Ξ^-$. The cross section of stopped $Ξ^-$ production is $\approx$ 8 times larger than obtained by fritiof model with same experimental conditions.

hep-ex↗

arXiv2006

The Preliminary Result from ($K^0_sπ^{\pm}$) Spectra in p+a Reaction at 10 Gev/C

The experimental data from 2m propane bubble chamber have been analyzed to search of scalar meson $κ$(800) in $K^0_sπ^{\pm}$ spectra for the reaction p+A at 10 GeV/c. The $K^0_sπ^{\pm}$ invariant mass spectra has shown similarly resonant structures with $M_{K^0_sπ}$=720,780 and 890 MeV/$c^2$. The M(890) peak is identified as the well known resonance $K^*$ from PDG.

hep-ex↗

arXiv2005

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

Experimental data from the 2m propane bubble chamber have been analyzed to search for an exotic baryon states, in the $ΛK^0_s$ decay mode for the reaction p+$C_3H_8$ at 10 GeV/c. The invariant mass spectrum $ΛK^0_s$ observe a narrow peaks at 1750$\pm$18, 1795$\pm$18,1850$\pm19$ MeV/$c^2$ and full widths of $Γ_{exp.}$= 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 $Ξ^0$ pentaquark states. The investigation has been performed at the Veksler and Baldin Laboratory of High Energies, JINR.

hep-ex↗

arXiv2005

$Λ$ and $K^0_s$ Production in pC Collisions at 10 Gev/c

The experimental data from the 2m propane bubble chamber have been analyzed for pC$\to Λ(K^0_s)X$ reactions at 10 GeV/c. The estimation of experimental inclusive cross sections for $Λ$ and $K^0_s$ production in the p$^{12}C$ collision is equal to $σ_Λ$= 13.3$\pm$1.7 mb and $σ_{K^0_s}$= 3.8$\pm$0.6 mb, respectively. The measured $Λ/π^+$ ratio from pC reaction is equal to (5.3$\pm0.8)*10^{-2}$. The experimental $Λ/π^+$ ratio in the pC reaction is approximately two times larger than the $Λ/π^+$ ratio from pp reactions or from simulated pC reactions by FRITIOF model for the same energy. The $Λ/π^+$ ratio in interaction C+C at momentum 10 Gev/c is four times larger than the $Λ/π^+$ ratio from p+p reactions at the same energy.

hep-ex↗

arXiv2004

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

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.

hep-ex↗

arXiv2004

The Observation of Multi-Quark Strange Metastable and Stable States

In the metastable state sector the $Λp$, $Λππ$ and $Λp π$ resonances found in n+$^{12}C$- collisions at 7 GeV/c. Preliminary results show that the predicted peaks has been confirmed in $p^{12}C$ collision at 10 GeV/c. In the stable state sector candidates for S=-2 light and heavy dibaryons observed in p+$^{12}C$ collision at 10 GeV/c.

hep-ex↗