Are there S=-2 Pentaquarks?

Abstract

Recent evidence for pentaquark baryons in the channels ${\Xi }^{-}{\pi }^{-}$, ${\Xi }^{-}{\pi }^{+}$ and their anti-particles claimed by the NA49 collaboration is critically confronted with the vast amount of existing data on $\Xi$ spectroscopy which was accumulated over the past decades. It is shown that the claim is at least partially inconsistent with these data. In addition two further exotic channels of the pentaquark type available in the NA49 data are investigated. It is argued that this study leads to internal inconsistency with the purported signals.

Cited by in corpus (19)

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• Exclusive Photoproduction of the Cascade (Xi) Hyperons
• Experimental Review on Pentaquarks
• Search for an exotic S=-2, Q=-2 baryon resonance at a mass near 1862 MeV in quasi-real photoproduction
• CKM Results From CLEO
• The X(3872) Meson and "Exotic" Spectroscopy at CDF II
• Light-Front Approach for Pentaquark Strong Decays
• Photoproduction of the Theta^+ resonance on the nucleon in a Regge model
• Two-meson cloud contribution to the baryon antidecuplet binding
• Are the anti-charmed and bottomed pentaquarks molecular heptaquarks?
• Heavy and Light Pentaquark Chiral Lagrangian
• Flavored exotic multibaryons and hypernuclei in topological soliton models
• The anti-decuplet candidate Xi--(1862) as a heptaquark with the overlap of two anti-kaons and a nucleon
• Molecular pentaquarks composed of a ground-state octet baryon and a $P-$wave anticharmed meson
• Kinematic selection criteria in a new resonance searches: Application to pentaquark states