Study of the $\gamma d\to K^{+}{K}^{-}np$ reaction and an alternative explanation for the "${\Theta }^{+}(1540)$ pentaquark" peak

Abstract

We present a calculation of the $\gamma d\to K^{+}{K}^{-}np$ reaction with the aim of seeing if the experimental peak observed in the $K^{+}n$ invariant mass around 1526 MeV, from where evidence for the existence of the ${\Theta }^{+}$ has been claimed, can be obtained without this resonance as a consequence of the particular dynamics of the process and the cuts applied in the experimental set up. We find that a combination of facts leads indeed to a peak around 1530 MeV for the invariant mass of $K^{+}n$ without the need to invoke any new resonance around this energy. This, together with statistical fluctuations that we prove to be large with the statistics of the experiment, is likely to produce the narrower peak observed there.

arXiv commentpublished version

References in corpus (15)

• The high-precision, charge-dependent Bonn nucleon-nucleon potential (CD-Bonn)
• Chiral dynamics in the presence of bound states: kaon-nucleon interactions revisited
• Evidence for Narrow S=+1 Baryon Resonance in Photo-production from Neutron
• Non perturbative chiral approach to s-wave \bar{K}N interactions
• Chiral Dynamics of the Two Λ(1405) States
• Low lying S=-1 excited baryons and chiral symmetry
• Evidence for the two pole structure of the Lambda(1405) resonance
• Evidence of the Θ^+ in the γd \to K^+K^-pn reaction
• Experimental Search for Pentaquarks
• Search for the ${\Theta }^{+}$ pentaquark in the reaction $\gamma d\to p{K}^{-}{K}^{+}n$
• Kaonic production of Lambda(1405) off deuteron target in chiral dynamics
• Unitary coupled channel analysis of the $\Lambda (1520)$ resonance
• Is the Theta+ a K pi N bound state?
• Measurement of the incoherent $\gamma d\to \varphi pn$ photoproduction near threshold
• KKbar photoproduction from protons

Cited by in corpus (11)

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• The ${\Lambda }_b\to J/\psi K^0\Lambda$ reaction and a hidden-charm pentaquark state with strangeness
• QCD and the Strange Baryon Spectrum
• A novel interpretation of the "${\Theta }^{+}(1540)$ pentaquark" peak
• On the hidden charm pentaquark-s in ${\Lambda }_b\to J/\psi K^{-}p$ decay
• High-resolution search for the ${\Theta }^{+}$ pentaquark via a pion-induced reaction at J-PARC
• A study of the $KN$-$K^{\ast }N$ coupled systems
• Theoretical study of incoherent phi photoproduction on a deuteron target
• Feasibility study of the $K^{+}d\to K^{0}pp$ reaction for the "${\Theta }^{+}$" pentaquark
• $N^{\ast }$ states with hidden charm and a three-body nature