Search for a Theta++ Pentaquark State

Abstract

Recent reports about the Theta+ (formerly known as Z+), a pentaquark state, have awakened considerable interest. We report our findings in search of a Theta++ state over a wide range in mass in the reaction gp-->Theta++K- from our analysis of CLAS data. The existence or nonexistence of this state might resolve the question of the isotensor states.

9 pages, 11 figures. Original version is the contribution to proceedings of the "VIII International Conference on Hypernuclear & Strange Particle Physics", Jefferson Lab, Newport News, VA, USA, October 14-18, 2003. The revised version contains more details for clarification, additional comparisons with theoretical predictions and other experimental results with references to recent papers. All qualitative results are unchanged

References in corpus (5)

• Evidence for Narrow S=+1 Baryon Resonance in Photo-production from Neutron
• 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
• K+ nucleon scattering and exotic S=+1 Baryons
• Interpretation of the Theta+ as an isotensor pentaquark with weakly decaying partners

Cited by in corpus (3)

• Pentaquark Theta^+(1540) production in gamma N --> K Anti-K N
• Present status on experimental search for pentaquarks
• Search for ${\Theta }^{++}$ Pentaquarks in the Exclusive Reaction $\gamma p\to K^{+}{K}^{-}p$