The Ambiguous Mass and Width of the P- Meson?

نویسنده

Martin B. Einhorn

چکیده

The relationship between the mass and width of the p -meson resonance seen in colliding beam experiments and the behavior of the 7r/r7~ scattering phase shift is discussed in detail. Two conclusions are drawn: (1) The resonance peak in e+eannihilation occurs 5 or 10 MeV below where the phase shift reaches n/2. (2) The width should not be identified with the slope of the phase shift at one point; in fact, it depends critically on details of the rr strong interaction over a wide energy range. (Submitted to Physical Review) t Supported by the U. S. Atomic Energy Commission.

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