Document Type

Article

Article Version

Publisher's PDF

Publication Date

1-1-2001

Abstract

We studied the exclusive reaction ep⃗ e′p′φ using the φ⃗ K+K- decay mode. The data were collected using a 4.2 GeV incident electron beam and the CEBAF Large Acceptance Spectrometer (CLAS) at the Thomas Jefferson National Accelerator Facility. Our experiment covers the range in Q2 from 0.7 to 2.2 GeV2, and W from 2.0 to 2.6 GeV. Taken together with all previous data, we find a consistent picture of φ production on the proton. Our measurement shows the expected decrease of the t slope with the vector-meson formation time cΔτ below 2 fm. At ⟨cΔτ⟩=0.6 fm, we measure bφ=2.27±0.42 GeV-2. The cross section dependence on W as W0.2±0.1 at Q2=1.3 GeV2 was determined by comparison with φ production at HERA after correcting for threshold effects. This is the same dependence as observed in photoproduction.

Comments

Copyright American Physical Society Publisher final version available at http://prc.aps.org/pdf/PRC/v63/i6/e065205

Publication Title

Physical Review C

Published Citation

K. Lukashin et al. [CLAS Collaboration], "Exclusive electroproduction of φ mesons at 4.2 GeV", Physical Review C 63.6 (2001) **Corrected Article: [Phys. Rev. C 63, 065205 (2001)], Phys. Rev. C 64, 059901 (2001). ** DOI: 10.1103/PhysRevC.63.065205

DOI

10.1103/PhysRevC.63.065205

Peer Reviewed

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