Elsevier

Physics Letters B

Volume 109, Issues 1–2, 11 February 1982, Pages 115-118
Physics Letters B

Evidence forΨ production by neutrinos via neutral currents

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Abstract

Experimental evidence for the diffractive production ofΨmesons in weak neutral current reactions is reported. The spectrum-averaged cross section for this process isσdiff = (4.2±1.5) × 10−41cm2/nucleon, in agreement with gluonfusion models, but at variance with vector dominance calculations.

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1

On leave from the Institute of Experimental Physics, Warsaw University, Warsaw, Poland.

5

We would like to thank E. Reya for fruitful discussions.

2

On leave from the Institute of High-Energy Physics, Peking, China.

3

Supported by the Bundesministerium fu¨r Forschung und Technologie, Bonn, Germany.

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