Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2000-12-23
Physics
High Energy Physics
High Energy Physics - Phenomenology
proc. of ``Possible Existence of sigma-Meson and Its Implication to Hadron Physics," YITP, Kyoto, June 12--14, 2000. 5 pages,
Scientific paper
The results of analyses obtained in Part I are examined from the viewpoint of chiral symmetry. The mass spectra of pi pi system are widely believed to be suppressed generally near the threshold, because of the derivative coupling property of Nambu-Goldstone pi meson. However, this suppression does not hold in the processes with large energy release, and the steep increase from the pi pi threshold observed in the transition Upsilon (3S-->1S) is shown to be consistent with general constraints from chiral symmetry.
Ishida Muneyuki
Ishida Shin
Komada Toshihiko
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