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- Spokesperson
- M. Battaglieri
- Abstract
- The differential cross section, dsigma/dt, for rho0 meson photoproduction on the proton above the resonance region was measured up to a momentum transfer -t = 5 GeV2 using the CLAS detector at the Thomas Jefferson National Accelerator Facility. The rho0 channel was extracted from the measured two charged-pion cross sections by fitting the pi+ pi- and p pi+ invariant masses. The low momentum transfer region shows the typical diffractive pattern expected from Reggeon exchange. The flatter behavior at large -t cannot be explained solely in terms of QCD-inspired two-gluon exchange models. The data indicate that other processes, like quark interchange, are important to fully describe r photoproduction.
- Publication
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- M. Battaglieri, E. Anciant, M. Anghinolfi, R. De Vita, E. Golovach, J. M. Laget, V. Mokeev, M. Ripani, and CLAS Collaboration Photoproduction of the Rho0 Meson on the Proton at Large Momentum Transfer // Phys.Rev.Let.87,172002(2001)
- Quantities
- dσ/dt
Measurements
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ID | Quantity | Beam | Target | Final state |
Q2min, GeV2 |
Q2max, GeV2 |
Wmin, GeV |
Wmax, GeV |
---|---|---|---|---|---|---|---|---|
E71M1 | dσ/dt | γ | p | ρ0 p | 0.0 | 0.0 | 2.62 | 2.684 |
E71M2 | dσ/dt | γ | p | ρ0 p | 0.0 | 0.0 | 2.684 | 2.807 |
E71M3 | dσ/dt | γ | p | ρ0 p | 0.0 | 0.0 | 2.807 | 2.867 |
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