Photoproduction of <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msup><mrow><mi>Y</mi></mrow><mrow><mo>*</mo></mrow></msup></mrow></math></span> Resonances above 1800 MeV

D. C. Lu; J. S. Greenberg; V. W. Hughes; R. C. Minehart; S. Mori; J. E. Rothberg; J. Tyson

doi:10.1103/PhysRevD.2.1846

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Photoproduction of $Y^{*}$ Resonances above 1800 MeV

D. C. Lu, J. S. Greenberg, V. W. Hughes, R. C. Minehart^*, S. Mori, J. E. Rothberg^†, and J. Tyson^‡

Gibbs Laboratory, Yale University, New Haven, Connecticut 06520

^*Present address: University of Virginia, Charlottesville, Va.
^†Present address: University of Washington, Seattle, Wash.
^‡Present address: Jackson State College, Jackson, Miss.

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Phys. Rev. D 2, 1846 – Published 1 November, 1970

DOI: https://doi.org/10.1103/PhysRevD.2.1846

Abstract

The photoproduction of $K^{+}$ mesons and hyperons with strangeness $S = - 1$ , in reactions of the type $γ + p \to Y^{*} + K^{+}$ , has been studied in the $Y^{*}$ mass range 1800-2600 MeV with a missing-mass spectrometer by analyzing the structures in the $K^{+}$ yield as a function of the end point bremsstrahlung energy. The $K^{+}$ yield was observed at the laboratory angle of $θ_{K} = 10 °$ and at the $K^{+}$ momenta of 2.5 and 2.0 BeV/c. A fit to the $K^{+}$ yield curve suggests, in addition to a smooth background, resonancelike structure at 1820±20, 2025±20, 2250±20, and 2530±25 MeV. Widths and photoproduction cross sections for these states were measured.

References (14)

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N. B. Mistry, S. Mori, D. I. Sober, and A. J. Sadoff, Phys. Letters 24B, 528 (1967) S. Mori, doctoral dissertation, Cornell University, 1966 (unpublished)
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B. Borgia, M. Grilli, P. Joos, L. Mezzetti, M. Nigro, E. Schiavuta, and F. Villa, in Proceedings of the Sienna International Conference on Elementary Particles and High-Energy Physics, 1963, edited by G. Bernadini and G. P. Puppi (Societa Italiana di Fisica, Bologna, 1963), Vol. I, p. 512
W. A. Blanpied, J. S. Greenberg, V. W. Hughes, P. Kitching, D. C. Lu, and R. C. Minehart, Phys. Rev. Letters 14, 741 (1965) J. S. Greenberg, W. A. Blanpied, V. W. Hughes, P. Kitching, D. C. Lu, and R. C. Minehart, in Proceedings of the International Symposium on Electron and Photon Interactions at High Energies (Springer-Verlag, Berlin 1965), Vol. II, p. 192 P. Kitching, doctoral dissertation, Yale University, 1966 (unpublished)
R. L. Cool, G. Giacomelli, T. F. Kycia, B. A. Leontic, K. K. Li, A. Lundby, and J. Teiger, Phys. Rev. Letters 16, 1228 (1966)
J. S. Greenberg, V. W. Hughes, D. C. Lu, R. C. Minehart, S. Mori, J. E. Rothberg, and J. Tyson, Phys. Rev. Letters 20, 221 (1968)
N. Barash-Schmidt, A. Barbaro-Galtieri, L. R. Price, A. H. Rosenfeld, P. Söding, C. G. Wohl, M. Roos, and G. Conforto, Rev. Mod. Phys. 41, 109 (1969)
M. Ferro-Luzzi, in Proceedings of the Thirteenth International Conference on High-Energy Physics, Berkeley, 1966 (University of California Press, Berkeley, 1967), p. 183
J. Tyson, J. S. Greenberg, V. W. Hughes, D. C. Lu, R. C. Minehart, S. Mori, and J. E. Rothberg, Phys. Rev. Letters 19, 255 (1967)
S. Mori, J. S. Greenberg, V. W. Hughes, D. C. Lu, R. C. Minehart, J. E. Rothberg, P. A. Thompson, and J. Tyson, Phys. Rev. 185, 1687 (1969)
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[c1] A. Silverman, R. R. Wilson, and W. M. Woodward, Phys. Rev. 108, 501 (1957) B. D. McDaniel, A. Silverman, R. R. Wilson, and G. Cortellessa, ibid. 115, 1039 (1959)

[c2] N. B. Mistry, S. Mori, D. I. Sober, and A. J. Sadoff, Phys. Letters 24B, 528 (1967) S. Mori, doctoral dissertation, Cornell University, 1966 (unpublished)

[c3] P. L. Donoho and R. L. Walker, Phys. Rev. 112, 981 (1958) H. M. Brody, A. M. Wetherell, and R. L. Walker, ibid. 119, 1710 (1960) C. W. Peck, ibid. 135, B830 (1964)

[c4] B. Borgia, M. Grilli, P. Joos, L. Mezzetti, M. Nigro, E. Schiavuta, and F. Villa, in Proceedings of the Sienna International Conference on Elementary Particles and High-Energy Physics, 1963, edited by G. Bernadini and G. P. Puppi (Societa Italiana di Fisica, Bologna, 1963), Vol. I, p. 512

[c5] W. A. Blanpied, J. S. Greenberg, V. W. Hughes, P. Kitching, D. C. Lu, and R. C. Minehart, Phys. Rev. Letters 14, 741 (1965) J. S. Greenberg, W. A. Blanpied, V. W. Hughes, P. Kitching, D. C. Lu, and R. C. Minehart, in Proceedings of the International Symposium on Electron and Photon Interactions at High Energies (Springer-Verlag, Berlin 1965), Vol. II, p. 192 P. Kitching, doctoral dissertation, Yale University, 1966 (unpublished)

[c6] R. L. Cool, G. Giacomelli, T. F. Kycia, B. A. Leontic, K. K. Li, A. Lundby, and J. Teiger, Phys. Rev. Letters 16, 1228 (1966)

[c7] J. S. Greenberg, V. W. Hughes, D. C. Lu, R. C. Minehart, S. Mori, J. E. Rothberg, and J. Tyson, Phys. Rev. Letters 20, 221 (1968)

[c8] N. Barash-Schmidt, A. Barbaro-Galtieri, L. R. Price, A. H. Rosenfeld, P. Söding, C. G. Wohl, M. Roos, and G. Conforto, Rev. Mod. Phys. 41, 109 (1969)

[c9] M. Ferro-Luzzi, in Proceedings of the Thirteenth International Conference on High-Energy Physics, Berkeley, 1966 (University of California Press, Berkeley, 1967), p. 183

[c10] J. Tyson, J. S. Greenberg, V. W. Hughes, D. C. Lu, R. C. Minehart, S. Mori, and J. E. Rothberg, Phys. Rev. Letters 19, 255 (1967)

[c11] S. Mori, J. S. Greenberg, V. W. Hughes, D. C. Lu, R. C. Minehart, J. E. Rothberg, P. A. Thompson, and J. Tyson, Phys. Rev. 185, 1687 (1969)

[c12] R. J. Abrams, R. L. Cool, G. Giacomelli, T. F. Kycia, B. A. Leontic, K. K. Li, and D. N. Michael, Phys. Rev. Letters 19, 678 (1967)

[c13] D. V. Bugg, R. S. Gilmore, K. M. Knight, D. C. Slater, G. H. Stafford, E. J. N. Wilson, J. D. Davies, J. D. Dowell, P. M. Hattersley, R. J. Homer, A. W. O'Dell, A. A. Carter, R. J. Tapper, and K. F. Riley, Phys. Rev. 168, 1466 (1968)

[c14] C. G. Wohl, F. T. Solmitz, and M. L. Stevenson, Phys. Rev. Letters 17, 107 (1966)

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Photoproduction of $Y^{*}$ Resonances above 1800 MeV

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Photoproduction of Y* Resonances above 1800 MeV

Abstract

References (14)

Photoproduction of $Y^{*}$ Resonances above 1800 MeV