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Prog. Theor. Phys. Vol. 103 No. 4 (2000) pp. 747-753

Is There Window for a “Supersoft” Pomeron in J/ψ Photoproduction at Low Energy?

D. Roy,¹ Toshiyuki Morii,¹ Hiroshi Toki² and A. I. Titov³

¹Graduate School of Science and Technology and
Faculty of Human Development, Kobe University
Kobe 657-8501, Japan
²Research Center of Nuclear Physics, Osaka University
Osaka 567-0047, Japan
³Bogolyubov Laboratory of Theoretical Physics, JINR
141980 Dubna, Russia

(Received September 28, 1999)

Abstract:

The low energy J/ψ photoproduction cross-section has been studied using the Pomeron model. To account for the discrepancy between experimental data and predictions of conventional models, i.e. the sum of the soft Pomeron with intercept 1.08 and the hard Pomeron with intercept 1.418, a Regge trajectory associated with a scalar meson (f,a) exchange, which we call a “supersoft” Pomeron, is introduced. To distinguish the conventional model from that with this new additional Pomeron, proposed observations related to other polarization observables in upcoming polarized experiments are discussed.

URL : http://ptp.ipap.jp/link?PTP/103/747/
DOI : 10.1143/PTP.103.747

[ Full Text PDF : FREE ACCESS (134K) ] Citation: Plain Text BiBTeX EndNote(RIS) RSS

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