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|Title:||Testing the Weisskopf-Wigner approximation by using neutral-meson-antimeson correlated states|
|Publisher:||ELSEVIER SCIENCE BV|
|Citation:||PHYSICS LETTERS B, 521(3-4), 267-272|
|Abstract:||We phenomenologically decompose the Weisskopf-Wigner approximation, as applied to the neutral flavoured meson (M-0) complexes, into three pieces and propose tests for these pieces. Our tests hold for general decay amplitudes and M-0-(M) over bar (0) mixing parameters. We concentrate on C-odd M-0(M) over bar (0) states and stress the importance of such tests in view of the variety of physics extracted from measurements on such complexes. Studying the feasibility of the tests confines one to the K-0(K) over bar (0) system at present. In particular, we show that the time dependence of the correlated decay phi --> K-0(K) over bar (0) --> 2(pi (+)pi (-)) is determined solely by the WWA and provides thus a clean test of it. (C) 2001 .|
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