Exotic Θ+ baryon from interference

Since all couplings of the exotic Θ+ baryon to normal hadrons seem to be small it is hard to reveal it in standard resonance searching. We suggest looking for the Θ+ production in interference with a known resonance yielding the same final state but having a high production rate. The interference production cross section is linear in the Θ+ couplings whereas the noninterference cross section is quadratic. That gives an obvious gain if the couplings are small. Moreover, employing the peculiar oscillating nature of the interference processes one can reduce the parasitic background and determine the Θ+ resonance parameters.