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Prog. Theor. Phys. Vol. 55 No. 5 (1976) pp. 1559-1570

[ Full Text PDF : FREE ACCESS (964K) ]

Form Factor Effect on Photodecay Processes of “ψ” Particles into a Pseudoscalar Meson in a Relativistic Composite Particle Model

Azusa Matsuda, Keisuke Okano, Seiji Saito, Kuniyoshi Yoshikawa and Masami Nakagawa*

Department of Physics, Waseda University, Tokyo
*Department of Physics, Meijo University, Nagoya

(Received September 11, 1975)

Abstract:

The photodecay width of “ψ” particles into a pseudoscalar meson is theoretically investigated on the basis of the relativistic composite particle model. It is shown that the form factor effect given by this model yields significant reduction for the photodecay width of “ψ”, because of large mass difference in this process. By use of broken SU(4) symmetry scheme and the above-mentioned mechanism, the photodecay widths of various vector mesons including “ψ” particles are numerically obtained. These results are in good agreement with the present experimental data.


URL : http://ptp.ipap.jp/link?PTP/55/1559/
DOI : 10.1143/PTP.55.1559

[ Full Text PDF : FREE ACCESS (964K) ] Citation:

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Citing Article(s) :

  1. Progress of Theoretical Physics Vol. 56 No. 6 (1976) pp. 1910-1921 :
    Strong and Radiative Decays of ψ and Related Particles in the SU (3)′ ×SU(3)′′ Scheme of the Three-Triplet Model
    Yoshimasa Somekawa and S. Y. Tsai
  2. Progress of Theoretical Physics Vol. 58 No. 3 (1977) pp. 907-920 :
    Broken Chiral SU(4) ⊗SU(4) Based on SU(4) \supsetSU(2) ⊗SU(2)
    Masao Inose
  3. Progress of Theoretical Physics Vol. 58 No. 5 (1977) pp. 1502-1515 :
    The Charm Scheme and Weak Decay
    Masahisa Matsuda, Masami Nakagawa, Kazuhiko Odaka, Shuzo Ogawa and Mamoru Shin-Mura
  4. Progress of Theoretical Physics Vol. 59 No. 2 (1978) pp. 491-499 :
    Masses of New Mesons and Effects of the Fifth Flavour
    Shoji Sawada
  5. Progress of Theoretical Physics Vol. 59 No. 3 (1978) pp. 949-958 :
    e+e- Decay Processes of cc Bound States in Relativistic Harmonic Oscillator Model
    Yoshiki Kizukuri, Keisuke Okano and Yoshiya Yamanaka
  6. Progress of Theoretical Physics Vol. 59 No. 5 (1978) pp. 1613-1624 :
    Broken Chiral SU(4)×SU(4)
    Takashi Fukuda
  7. Progress of Theoretical Physics Vol. 61 No. 6 (1979) pp. 1752-1761 :
    Photodecay Processes of J/ψ → fγ, f'γ and so on, in Relativistic Harmonic Oscillator Model
    Keisuke Okano

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