Photoproduction of straight phi(1020) mesons on the proton at large momentum transfer
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.
Murphy
L
DAPNIA-SPhN, CEA Saclay, F91191 Gif-sur-Yvette Cedex, France.
Mutchler
GS
Napolitano
J
Niyazov
RA
Opper
A
O'Brien
JT
Philips
S
Pivnyuk
N
Pocanic
D
Pogorelko
O
Polli
E
Preedom
BM
Price
JW
Qin
LM
Raue
BA
Reolon
AR
Riccardi
G
Ricco
G
Ripani
M
Ritchie
BG
Ronchetti
F
Rossi
P
Roudot
F
Rowntree
D
Rubin
PD
Salgado
CW