Abstract
The results of an experiment to study elasticK + K − photoproduction are presented. Differential cross sections and spin density matrix elements for ϕ(1.019) production are stddied as a function of incident photon energy and over a wide range of momentum transfer,t (t min >t>−1.5(GeV/c)2). Helicity conserving amplitudes are observed to dominate ϕ production throughout this range and the differential cross sections exhibit a forward diffractive peak which cannot be understood in terms of a simple exponential dependence. A new value of the photon ϕ coupling constant is determined and shown to be consistent withe + e − annihilation measurements. A detailed study of the energy dependence of the differential cross sections is made, including other experimental data, and the extracted effective Regge trajectory compared with other diffractive processes. A study of the dependence of theK + K − decay angular distribution on invariant mass reveals evidence for ans wave contribution interfering with thep wave ϕ which may be attributable to theS * meson.
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References
R. Erbe et al.: Phys. Rev.175, 1669 (1968)
G. McClellan et al.: Phys. Rev. Lett.26, 1593 (1971).
H. Alvensleben et al.: Phys. Rev. Lett.28, 66 (1972)
R. Anderson et al.: Phys. Rev. D1, 27 (1970)
H.-J. Behrend et al.: Nucl. Phys. B114, 22 (1978).
M.A.R. Kemp, R. Marshall: Daresbury Lab. report DL/P226 (1975)
D.P. Barber et al.: LAMP group: Phys. Letts.79B 150 (1978)
S. Bartalucci et al.: Nuovo Cimento39A, 374 (1977)
D. Benaksas et al.: Phys. Lett. B39, 289 (1972); B42, 507 (1972); B40, 685 (1972); B48, 155 (1974)
From simple quark additivity and the quark content of π,K, and ϕ mesons and of the nucleon many relations can be derived between ϕp andK ± p, π± p,K ± n, and π± n total cross sections. An example is the result σ T (φp)=2σ T (K + p)+σ T (π− p)−2σ T (π+ p)
D.C. Fries et al.: Nucl. Phys. B143, 408 (1978)
G.N. Patrick: Ph. D. Thesis, University of Lancaster (unpublished)
D.P. Barber et al.. LAMP group: Nucl. Instrum. Methods155, 353 (1978)
D.P. Barber et al.: LAMP group: Nucl. Instrum. Methods145, 453 (1977)
It was proved by studying the residuals for straight tracks that the nearest wire to a track was the most probable wire to register a hit; for details see [10]
R.K. Carnegie et al.: Phys. Lett.59B, 313 (1975)
G. Barbiellini et al.: Phys. Lett.39B, 663 (1972)
D.W.G.S. Leith: Diffractive photoproduction, in: Electromagnetic interactions of hadrons, Vol. I. A. Donnachie, G. Shaw (eds.). New York: Plenum Press 1979
D.P. Barber et al.: To be published
P.D.B. Collins, F.D. Gault, A.Martin: Nucl. Phys. B80, 135 (1974)
G.Kane: Implications of experimental data for our view of the pomeron. Michigan report UM-73-10 (1973)
E. Gotsman, A. Levy: Phys. Rev. D13, 3036 (1970)
P.M. Egloff et al.: Phys. Rev. Lett.43, 657 (1979)
D. Aston et al.: Nucl. Phys. B172, 1 (1980)
G.V. Dass, H. Fraas: Ann. Phys.115, 467 (1978)
J. Randa: J. Phys. G.3, 761 (1977)
I. Derado et al.: Nucl. Phys. B38, 541 (1972)
J.D. Jackson: Nuovo Cimento34B, 1644 (1964)
C. Bricman et al.: Phys. Lett.75B, 1 (1978)
R.L. Anderson et al.: Phys. Rev. D1, 27 (1970)
R.L. Anderson et al.: Phys. Rev. D7, 3150 (1973)
J. Ballam et al.: Phys. Rev. D7, 3150 (1973)
Aachen-Bonn-Hamburg-Heidelberg-München Collaboration: Phys. Rev.175, 1669 (1968)
H. Alvensleben et al.: Phys. Rev. Lett.28, 66 (1972)
Ch. Berger et al.: Phys. Lett.39B, 659 (1972)
H.J. Besch et al.: Nucl. Phys. B70, 257 (1974)
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Barber, D.P., Dainton, J.B., Lee, L.C.Y. et al. A study of elastic photoproduction of low massK + K − pairs from hydrogen in the energy range 2.8–4.8 GeV. Z. Phys. C - Particles and Fields 12, 1–15 (1982). https://doi.org/10.1007/BF01475724
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DOI: https://doi.org/10.1007/BF01475724