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Prog. Theor. Phys. Vol. 88 No. 1 (1992) pp. 89-101

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“Variant Mass and Width” of the Axial-Vector a1 and b1 Mesons and Existence of Hybrid States

Shin Ishida, Masuho Oda,* Haruhiko Sawazaki and Kenji Yamada**

Atomic Energy Research Institute, College of Science and Technology, Nihon University, Tokyo 101
*Faculty of Engineering, Kokushikan University, Tokyo 154
**Department of Computer and Information Science, Junior College Narashino Campus, Nihon University, Funabashi 274

(Received February 17, 1992)

Abstract:

In a recent experiment on the peripheral π-p charge-exchange reaction at KEK it has been observed that the a1 meson has very different values of mass and width, compared to the ones thus far obtained with the diffractive process, as well as compared to the ones recently obtained with the central-collision process. Similarly in the same experiment the b1 meson observed in the ρη channel has been shown to have an appreciably higher mass and a somewhat narrower width than the respective standard values obtained in the ωπ channel. We argue that these “variant mass and width” of the a1 and b1 mesons are, respectively, due to interference between the two “doubling” partners with the same quantum numbers, an ordinary qq meson and a hybrid qqg meson. A very simple actual analysis is performed which seems to suggest the validity of our interpretation.


URL : http://ptp.ipap.jp/link?PTP/88/89/
DOI : 10.1143/PTP.88.89

[ Full Text PDF : FREE ACCESS (1240K) ] Citation:

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Citing Article(s) :

  1. Progress of Theoretical Physics Vol. 99 No. 6 (1998) pp. 1031-1044 :
    Relation between Scattering and Production Amplitudes
    Muneyuki Ishida, Shin Ishida and Taku Ishida
  2. Progress of Theoretical Physics Vol. 104 No. 4 (2000) pp. 785-807 :
    Covariant Quark Representation of Composite Meson Systems and Chiral Symmetry
    Shin Ishida, Muneyuki Ishida and Tomohito Maeda

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