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Interpretation of the Θ as an isotensor pentaquark with weakly decaying partners |
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| Authors: | Simon Capstick Philip R Page Winston Roberts |
| Institution: | a Department of Physics, Florida State University, Tallahassee, FL 32306-4350, USA b Theoretical Division, MS B283, Los Alamos National Laboratory, Los Alamos, NM 87545, USA c Department of Physics, Old Dominion University, Norfolk, VA 23529, USA d Theory Group, Thomas Jefferson National Accelerator Facility, 12000 Jefferson Avenue, Newport News, VA 23606, USA |
| Abstract: | 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−. |
| Keywords: | Pentaquark Isotensor Weak decay |
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