Photoproduction of the ρ0 meson on the proton at large momentum transfer

CLAS Collaboration

Research output: Contribution to journalArticle

Abstract

The differential cross section, dσ/dt, for ρ0 meson photoproduction on the proton above the resonance region was measured up to a momentum transfer −t = 5GeV2 using the CLAS detector at the Thomas Jefferson National Accelerator Facility. The ρ0 channel was extracted from the measured two charged-pion cross sections by fitting the π+π and pπ+ 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 ρ photoproduction.

Original languageEnglish (US)
Pages (from-to)172002-1-172002-5
JournalPhysical Review Letters
Volume87
Issue number17
DOIs
StatePublished - Oct 22 2001

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photoproduction
momentum transfer
mesons
protons
cross sections
pions
accelerators
quantum chromodynamics
quarks
detectors

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Photoproduction of the ρ0 meson on the proton at large momentum transfer. / CLAS Collaboration.

In: Physical Review Letters, Vol. 87, No. 17, 22.10.2001, p. 172002-1-172002-5.

Research output: Contribution to journalArticle

CLAS Collaboration. / Photoproduction of the ρ0 meson on the proton at large momentum transfer. In: Physical Review Letters. 2001 ; Vol. 87, No. 17. pp. 172002-1-172002-5.
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title = "Photoproduction of the ρ0 meson on the proton at large momentum transfer",
abstract = "The differential cross section, dσ/dt, for ρ0 meson photoproduction on the proton above the resonance region was measured up to a momentum transfer −t = 5GeV2 using the CLAS detector at the Thomas Jefferson National Accelerator Facility. The ρ0 channel was extracted from the measured two charged-pion cross sections by fitting the π+π− and pπ+ 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 ρ photoproduction.",
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T1 - Photoproduction of the ρ0 meson on the proton at large momentum transfer

AU - CLAS Collaboration

AU - Battaglieri, M.

AU - Anciant, E.

AU - Anghinolfi, M.

AU - De Vita, R.

AU - Golovach, E.

AU - Laget, J. M.

AU - Mokeev, V.

AU - Ripani, M.

AU - Adams, G.

AU - Amaryan, M. J.

AU - Armstrong, D. S.

AU - Asavapibhop, B.

AU - Asryan, G.

AU - Audit, G.

AU - Auger, T.

AU - Avakian, H.

AU - Barrow, S.

AU - Beard, K.

AU - Bektasoglu, M.

AU - Berman, B. L.

AU - Bianchi, N.

AU - Biselli, A. S.

AU - Boiarinov, S.

AU - Branford, D.

AU - Briscoe, W. J.

AU - Brooks, W. K.

AU - Burkert, V. D.

AU - Calarco, J. R.

AU - Capitani, G. P.

AU - Carman, D. S.

AU - Carnahan, B.

AU - Cazes, A.

AU - Cetina, C.

AU - Cole, P. L.

AU - Coleman, A.

AU - Cords, D.

AU - Corvisiero, P.

AU - Crabb, D.

AU - Crannell, H.

AU - Cummings, J. P.

AU - DeSanctis, E.

AU - Degtyarenko, P. V.

AU - Demirchyan, R.

AU - Denizli, H.

AU - Dennis, L.

AU - Dharmawardane, K. V.

AU - Dhuga, K. S.

AU - Djalali, C.

AU - Dugger, Michael

AU - Ritchie, Barry

PY - 2001/10/22

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N2 - The differential cross section, dσ/dt, for ρ0 meson photoproduction on the proton above the resonance region was measured up to a momentum transfer −t = 5GeV2 using the CLAS detector at the Thomas Jefferson National Accelerator Facility. The ρ0 channel was extracted from the measured two charged-pion cross sections by fitting the π+π− and pπ+ 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 ρ photoproduction.

AB - The differential cross section, dσ/dt, for ρ0 meson photoproduction on the proton above the resonance region was measured up to a momentum transfer −t = 5GeV2 using the CLAS detector at the Thomas Jefferson National Accelerator Facility. The ρ0 channel was extracted from the measured two charged-pion cross sections by fitting the π+π− and pπ+ 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 ρ photoproduction.

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DO - 10.1103/PhysRevLett.87.172002

M3 - Article

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JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

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