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Prog. Theor. Phys. Vol. 52 No. 3 (1974) pp. 971-985

[ Full Text PDF : FREE ACCESS (1257K) ]

Breaking of Line Reverse Relation and Exotics

Masahiro Imachi and Shoichiro Otsuki

Department of Physics, Kyushu University, Fukuoka 812

(Received December 21, 1973)

Abstract:

Under a hypothesis that the meson-baryon reaction amplitude corresponds to the urbaryon rearrangement diagram (URD), the X type (t-u dual) URD is related to the H type (s-t dual) one in the forward region by reversing the urbaryon line. It has been taken that the X type amplitude has the magnitude equal to the H type one and is real, and that the Z type (s-u dual) amplitude is negligible; line reverse relation (LRR). There are, however, indications that the LRR is more or less broken. Two simple models resulting in the LR breaking under the URD hypothesis are investigated.
(1) ZII model. One of the three Z type URD's, which is named ZII, has a remarkable peculiarity that its t-channel quantum numbers are non-exotic irrespective of the exotic four-urbaryon configuration. If the ZII amplitude survives up to high energies from this peculiarity, an apparent LR breaking results in KN →πY vs. πN →KY processes.
(2) Im X model. The imaginary part of the X amplitude, which may be compatible with the possible KN s-channel exotics such as Z0 (P1/2) and Z1 (P3/2), gives rise to an intrinsic LR breaking.
A comparison between the two models and their consequences are examined. LR breakings in decuplet baryon production and of baryon exchange are also discussed.


URL : http://ptp.ipap.jp/link?PTP/52/971/
DOI : 10.1143/PTP.52.971

[ Full Text PDF : FREE ACCESS (1257K) ] Citation:

References:

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Citing Article(s) :

  1. Progress of Theoretical Physics Vol. 53 No. 1 (1975) pp. 125-139 :
    Meson-Baryon Backward Scattering and Resonance Correlation
    Kazuo Ghoroku, Masahiro Imachi, Shoichiro Otsuki and Fumihiko Toyoda
  2. Progress of Theoretical Physics Vol. 53 No. 5 (1975) pp. 1514-1516 :
    Breaking of Line Reversal Relations and the Amplitude Structure in π-N and K(K)-N Charge Exchange Scattering
    Fumihiko Nakamura
  3. Progress of Theoretical Physics Supplement No.63 (1978) pp. 49-279 :
    Constituent Rearrangement Model and Hadron Reactions
    Yuji Igarashi, Masahiro Imachi, Takeo Matsuoka, Kansuke Ninomiya, Shoichiro Otsuki, Shoji Sawada and Fumihiko Toyoda

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