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Exclusive photoproduction of J/ψ mesons at HERA

Abstract:

The exclusive photoproduction of J/ψ mesons, γp → J/ψp, has been studied in ep collisions with the ZEUS detector at HERA, in the kinematic range 20 < W < 290 GeV, where W is the photon-proton centre-of-mass energy. The J/ψ mesons were reconstructed in the ninon and the electron decay channels using integrated luminosities of 38 pb-1 and 55 pb-1, respectively. The helicity structure of J/ψ production shows that the hypothesis of s-channel helicity conservation is satisfied within two sta...

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Publisher copy:
10.1007/s10052-002-0953-7

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Journal:
European Physical Journal C
Volume:
24
Issue:
3
Pages:
345-360
Publication date:
2002-07-05
DOI:
ISSN:
1434-6044
URN:
uuid:156bda02-7904-4888-b513-ae976145ac98
Source identifiers:
172282
Local pid:
pubs:172282
Language:
English

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