Improved study of a possible Theta+ production in the pp -> p K0 sigma+ reaction with the COSY-TOF spectrometer

Abstract

The pp -> p K0 Sigma+ reaction was investigated with the TOF spectrometer at COSY at 3.059 GeV/c incident beam momentum. The main objective was to clarify whether or not a narrow exotic S = +1 resnance, the Theta+ pentaquark, is populated at 1.53 GeV/c2 in the K0 p subsystem with a data sample of much higher statistical significance compared to the previously reported data in this channel. An analysis of these data does not confirm the existence of the Theta+ pentaquark. This is expressed as an upper limit for the cross section sigma (pp -> p K0 Sigma+) < 0.15 microbarn at the 95 percent confidence level.

arXiv comment11 pages, 5 figures

References in corpus (30)

• Evidence for Narrow S=+1 Baryon Resonance in Photo-production from Neutron
• Exotic Anti-Decuplet of Baryons: Prediction from Chiral Solitons
• Observation of an Exotic $S=+1$ Baryon in Exclusive Photoproduction from the Deuteron
• Observation of a baryon resonance with positive strangeness in K+ collisions with Xe nuclei
• Evidence for the positive-strangeness pentaquark ${\Theta }^{+}$ in photoproduction with the SAPHIR detector at ELSA
• Observation of an Exotic Baryon with S=+1 in Photoproduction from the Proton
• Evidence for a narrow |S|=1 baryon state at a mass of 1528 MeV in quasi-real photoproduction
• Evidence for a narrow baryonic state decaying to K0s-p and K0s-pbar in deep inelastic scattering at HERA
• Evidence for a narrow resonance at 1530 MeV/c2 in the K0 p - system of the reaction pp --> Sigma+ K0 p from the COSY-TOF experiment
• Evidence for formation of a narrow pKshort resonance with mass near 1533 MeV in neutrino interactions
• Search for the Pentaquark State in $\psi (2S)$ and $J/\psi$ Decays to $K_S^{0}p{K}^{-}\bar{n}$ and $K_S^0\bar{p}{K}^{+}n$
• Search for the ${\Theta }^{+}$ pentaquark in the reaction $\gamma d\to p{K}^{-}{K}^{+}n$
• Search for ${\Theta }^{+}(1540)$ pentaquark in high statistics measurement of $\gamma p\to {\bar{K}}^0{K}^{+}n$ at CLAS
• New results on the limit for the width of the exotic Theta^+ resonance
• Measurement of the Branching Fraction of J/psi --> pi+ pi- pi0
• Search for Theta(1540)^+ in exclusive proton-induced reaction p+C(N) \to Theta^+ \bar{K}^0 + C(N) at the energy of 70 GeV
• Search for Theta^+ and Xi^{--}_{3/2} pentaquarks in HERA-B
• High Statistics Search for the Theta+(1.54) Pentaquark State
• Further evidence for formation of a narrow baryon resonance with positive strangeness in K+ collisions with Xe nuclei
• Pentaquark Searches at CDF
• Search for Theta+ via pi- p --> K- X reaction near production threshold
• Search for the Theta+ pentaquark in the gamma d -> Lambda n K+ reaction measured with CLAS
• Observation of narrow baryon resonance decaying into $p{K}_s^0$ in pA-interactions at $70GeV/c$ with SVD-2 setup
• Search for the Theta(1540)+ pentaquark using kaon secondary interactions at Belle
• Analysis of Theta^+ production in K^+Xe collisions
• On the search for a narrow penta-quark Z${}^{+}$ baryon in NN interactions
• Observation of S=+1 narrow resonances in the system $K_s^{0}p$ from p+$C_3{H}_8$ collision at 10 GeV/c
• Pentaquark searches at FOCUS
• A Phenomenological Lagrangian Approach to Two Kaon Photoproduction and Pentaquark Searches
• The narrow pentaquark

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• Hadron Physics at J-PARC
• The energy dependence of the pp->K+ n Sigma+ reaction close to threshold
• Search for Theta+ via K+p -> pi+X reaction with a 1.2 GeV/c K+ beam
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• Present status on experimental search for pentaquarks
• An explanation why the Theta+ is seen in some experiments and not in others
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• Systematic study of pentaquark states: $qqq-q\bar{q}$ configuration
• Comparison of inclusive K+ production in proton-proton and proton-neutron collisions
• Strangeness Production in Hadron Reactions
• Baryon-baryon and baryon-antibaryon interaction amplitudes in the spin--momentum operator expansion method