Physics Letters B
The Θ+(1540), recently observed at LEPS, DIANA and CLAS, is hypothesized to be an isotensor resonance. This implies the existence of a multiplet where the Θ++, Θ+ and Θ0 have isospin-violating strong decays, and the Θ+++ and Θ− have weak decays and so are long-lived. Production mechanisms for the weakly-decaying states are discussed. The JP assignment of the Θ is most likely 1/2− or 3/2−.
Original Publication Citation
Capstick, S., Page, P. R., & Roberts, W. (2003). Interpretation of the Θ+ as an isotensor pentaquark with weakly decaying partners. Physics Letters B, 570(3–4), 185-190. doi: http://dx.doi.org/10.1016/j.physletb.2003.08.010
Capstick, Simon; Page, Philip R.; and Roberts, Winston, "Interpretation of the Θ+ as an Isotensor Pentaquark With Weakly Decaying Partners" (2003). Physics Faculty Publications. 30.