Natural- versus Unnatural-Parity Exchange in Forward Scattering

Richard M. Weiner

doi:10.1103/PhysRevD.4.2174

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Natural- versus Unnatural-Parity Exchange in Forward Scattering

Richard M. Weiner^*

Physics Department, Indiana University, Bloomington, Indiana 47401

^*Supported in part by the National Science Foundation.

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Phys. Rev. D 4, 2174 – Published 1 October, 1971

DOI: https://doi.org/10.1103/PhysRevD.4.2174

Abstract

The assumption of one-particle (pole) exchange at the quark level for $s \to \infty$ leads to the decoupling, in the forward direction, of natural-parity particles (leading Regge trajectories) from octet-decuplet baryonic vertices. In the differential cross section of the reaction $π p \to π Δ$ a dip is predicted at $t ≃ 0$ , for high $s$ . The study of this dip can lead to an estimate of the upper limit of the quark mass.

References (13)

J. D. Jackson, Rev. Mod. Phys. 42, 12 (1970)
G. Cohen-Tannoudji, P. W. Salin, and A. Morel, Nuovo Cimento 55A, 412 (1968)
L. Jones, Phys. Rev. 163, 1523 (1967)
S. D. Drell and J. D. Sullivan, Phys. Rev. Letters 19, 268 (1967)
E. M. Levin and L. L. Frankfurt, Zh. Eksperim. i Teor. Fiz. Pis'ma v Redaktsiyu 2, 105 (1965) [Soviet Phys. JETP Letters 2, 65 (1965)] H. J. Lipkin, F. Scheck, and M. Stern, Phys. Rev. 152, 1375 (1966) C. Itzykson and M. Jacob, Nuovo Cimento 48A, 909 (1967)
H. Harari and H. J. Lipkin, Phys. Rev. 140, B1617 (1965) H. J. Lipkin in Proceedings of the Third Coral Gables Conference on Symmetry Principles at High Energies, University of Miami, 1966, edited by A. Perlmutter, J. Wojtaszek, E. C. G. Sudarshan, and B. Kurşunoğlu (Freeman, San Francisco, 1966), p. 97 H. J. Lipkin and S. Meshkov, Phys. Rev. 143, 1269 (1966)
[8]
R. M. Weiner, Phys. Rev. D 4, 813 1971
Omitted endnote
Kugler ([11]) [12,13]
M. Kugler, Phys. Letters 32B, 106 (1970)
G. Wolf, Phys. Rev. 182, 1538 (1969) A. Ma et al., Phys. Rev. Letters 24, 1031 (1970)
Omitted endnote

[c1] J. D. Jackson, Rev. Mod. Phys. 42, 12 (1970)

[c2] G. Cohen-Tannoudji, P. W. Salin, and A. Morel, Nuovo Cimento 55A, 412 (1968)

[c3] L. Jones, Phys. Rev. 163, 1523 (1967)

[c4] S. D. Drell and J. D. Sullivan, Phys. Rev. Letters 19, 268 (1967)

[c5] E. M. Levin and L. L. Frankfurt, Zh. Eksperim. i Teor. Fiz. Pis'ma v Redaktsiyu 2, 105 (1965) [Soviet Phys. JETP Letters 2, 65 (1965)] H. J. Lipkin, F. Scheck, and M. Stern, Phys. Rev. 152, 1375 (1966) C. Itzykson and M. Jacob, Nuovo Cimento 48A, 909 (1967)

[c6] H. Harari and H. J. Lipkin, Phys. Rev. 140, B1617 (1965) H. J. Lipkin in Proceedings of the Third Coral Gables Conference on Symmetry Principles at High Energies, University of Miami, 1966, edited by A. Perlmutter, J. Wojtaszek, E. C. G. Sudarshan, and B. Kurşunoğlu (Freeman, San Francisco, 1966), p. 97 H. J. Lipkin and S. Meshkov, Phys. Rev. 143, 1269 (1966)

[c7] [8]

[c8] R. M. Weiner, Phys. Rev. D 4, 813 1971

[c9] Omitted endnote

[c10] Kugler ([11]) [12,13]

[c11] M. Kugler, Phys. Letters 32B, 106 (1970)

[c12] G. Wolf, Phys. Rev. 182, 1538 (1969) A. Ma et al., Phys. Rev. Letters 24, 1031 (1970)

[c13] Omitted endnote

Physical Review D

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Natural- versus Unnatural-Parity Exchange in Forward Scattering

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