title: Photoproduction of straight phi(1020) mesons on the proton at large momentum transfer
abstract: The cross section for straight phi meson photoproduction on the proton has been measured for the first time up to a four-momentum transfer -t = 4 GeV2, using the CLAS detector at the Thomas Jefferson National Accelerator Facility. At low four-momentum transfer, the differential cross section is well described by Pomeron exchange. At large four-momentum transfer, above -t = 1.8 GeV2, the data support a model where the Pomeron is resolved into its simplest component, two gluons, which may couple to any quark in the proton and in the straight phi.
authors.affiliation: DAPNIA-SPhN, CEA Saclay, F91191 Gif-sur-Yvette Cedex, France.
authors.initials: L
authors.lastname: Murphy
authors.initials: GS
authors.lastname: Mutchler
authors.initials: J
authors.lastname: Napolitano
authors.initials: RA
authors.lastname: Niyazov
authors.initials: A
authors.lastname: Opper
authors.initials: JT
authors.lastname: O'Brien
authors.initials: S
authors.lastname: Philips
authors.initials: N
authors.lastname: Pivnyuk
authors.initials: D
authors.lastname: Pocanic
authors.initials: O
authors.lastname: Pogorelko
authors.initials: E
authors.lastname: Polli
authors.initials: BM
authors.lastname: Preedom
authors.initials: JW
authors.lastname: Price
authors.initials: LM
authors.lastname: Qin
authors.initials: BA
authors.lastname: Raue
authors.initials: AR
authors.lastname: Reolon
authors.initials: G
authors.lastname: Riccardi
authors.initials: G
authors.lastname: Ricco
authors.initials: M
authors.lastname: Ripani
authors.initials: BG
authors.lastname: Ritchie
authors.initials: F
authors.lastname: Ronchetti
authors.initials: P
authors.lastname: Rossi
authors.initials: F
authors.lastname: Roudot
authors.initials: D
authors.lastname: Rowntree
authors.initials: PD
authors.lastname: Rubin
authors.initials: CW
authors.lastname: Salgado