On the possibility of observing a(0)(0)(980)-f(o)(980) mixing in the reaction pi(-) p -> eta pi(0)n on a polarized target

摘要

It is shown that the spin asymmetry in the reaction pi(-)p --> a(o)(o)(980)n --> (eta pi(o))(s)n is highly sensitive to the mixing of the a(o)(o)(980) and f(o)(980) resonances. At low momentum transfers (namely, in any of the intervals 0 <= -t <= 0.025.... 0.1 GeV2), the asymmetry normalized in such a way that it takes values between -1 and 1 must undergo a jump Close in magnitude to unity in the region of the eta pi(o) invariant masses between 0.965 and 1.01 GeV A large jump of the asymmetry is due exclusively to a(o)(o)(980)-f(o)(980) mixing. A very high resolution in the eta pi(o) invariant mass is not required for observing the jump of the asymmetry. The energy dependence of the polarization effect is expected to be rather weak therefore, the polarization effect in question can be studied at any high energy-for example, in the range between 8 and 100 GeV (C) 2005 Pleiades Publishing, Inc.