Exclusive leptoproduction of p(0) mesons from hydrogen at intermediate virtual photon energies

HERMES Collaboration

doi:10.1007/s100520000483

Exclusive leptoproduction of p(0) mesons from hydrogen at intermediate virtual photon energies

HERMES Collaboration

Research output: Contribution to journal › Article › Academic › peer-review

Abstract

Measurements of the cross section for exclusive virtual-photoproduction of rho (0) mesons from hydrogen are reported. The data were collected by the HERMES experiment using 27.5 GeV positrons incident on a hydrogen gas target in the HERA storage ring. The invariant mass W of the photon-nucleon system ranges from 4.0 to 6.0 GeV, while the negative squared four-momentum Q(2) Of the virtual photon varies from 0.7 to 5.0 GeV2. The present data together with roost of the previous data in the intermediate W-domain are well described by a model that infers the W-dependence of the cross section from the dependence on the Bjorken scaling variables of the unpolarized structure function for deep-inelastic scattering. In addition, a model calculation based on OR-Forward Parton Distributions gives a fairly good account of the longitudinal component of the rho (0) production cross section for Q(2) > 2 GeV2.

Original language	English
Pages (from-to)	389-398
Number of pages	10
Journal	European Physical Journal C
Volume	17
Issue number	3
DOIs	https://doi.org/10.1007/s100520000483
Publication status	Published - 1 Nov 2000
Externally published	Yes

Keywords

NONFORWARD PARTON DISTRIBUTIONS
VECTOR-MESONS
DIFFRACTIVE PRODUCTION
PHI ELECTROPRODUCTION
COMPTON-SCATTERING
NUCLEON
RHO(0)
HERA
PHYSICS
QCD

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10.1007/s100520000483

Cite this

@article{28fffff70dce45b2a26ef5717ee923f7,

title = "Exclusive leptoproduction of p(0) mesons from hydrogen at intermediate virtual photon energies",

abstract = "Measurements of the cross section for exclusive virtual-photoproduction of rho (0) mesons from hydrogen are reported. The data were collected by the HERMES experiment using 27.5 GeV positrons incident on a hydrogen gas target in the HERA storage ring. The invariant mass W of the photon-nucleon system ranges from 4.0 to 6.0 GeV, while the negative squared four-momentum Q(2) Of the virtual photon varies from 0.7 to 5.0 GeV2. The present data together with roost of the previous data in the intermediate W-domain are well described by a model that infers the W-dependence of the cross section from the dependence on the Bjorken scaling variables of the unpolarized structure function for deep-inelastic scattering. In addition, a model calculation based on OR-Forward Parton Distributions gives a fairly good account of the longitudinal component of the rho (0) production cross section for Q(2) > 2 GeV2.",

keywords = "NONFORWARD PARTON DISTRIBUTIONS, VECTOR-MESONS, DIFFRACTIVE PRODUCTION, PHI ELECTROPRODUCTION, COMPTON-SCATTERING, NUCLEON, RHO(0), HERA, PHYSICS, QCD",

author = "A. Airapetian and N. Akopov and I. Akushevich and M. Amarian and J. Arrington and E.C. Aschenauer and H. Avakian and R. Avakian and A. Avetissian and E. Avetissian and P. Bailey and B. Bains and C. Baumgarten and M. Beckmann and S. Belostotski and S. Bernreuther and N. Bianchi and H. Bottcher and A. Borissov and M. Bouwhuis and J. Brack and S. Brauksiepe and B. Braun and W. Bruckner and A. Brull and P. Budz and H.J. Bulten and G.P. Capitani and P. Carter and P. Chumney and E. Cisbani and G.R. Court and P.F. Dalpiaz and {De Leo}, R. and {De Nardo}, L. and {De Sanctis}, E. and {De Schepper}, D. and E. Devitsin and P.K.A.D. Huberts and {Di Nezza}, P. and V. Djordjadze and M. Duren and A. Dvoredsky and G. Elbakian and J. Ely and A. Fantoni and A. Fechtchenko and M. Ferro-Luzzi and K. Fiedler and {van den Brand}, J.F.J. and {HERMES Collaboration}",

year = "2000",

month = nov,

day = "1",

doi = "10.1007/s100520000483",

language = "English",

volume = "17",

pages = "389--398",

journal = "European Physical Journal C",

issn = "1434-6044",

publisher = "Springer Verlag",

number = "3",

}

TY - JOUR

T1 - Exclusive leptoproduction of p(0) mesons from hydrogen at intermediate virtual photon energies

AU - Airapetian, A.

AU - Akopov, N.

AU - Akushevich, I.

AU - Amarian, M.

AU - Arrington, J.

AU - Aschenauer, E.C.

AU - Avakian, H.

AU - Avakian, R.

AU - Avetissian, A.

AU - Avetissian, E.

AU - Bailey, P.

AU - Bains, B.

AU - Baumgarten, C.

AU - Beckmann, M.

AU - Belostotski, S.

AU - Bernreuther, S.

AU - Bianchi, N.

AU - Bottcher, H.

AU - Borissov, A.

AU - Bouwhuis, M.

AU - Brack, J.

AU - Brauksiepe, S.

AU - Braun, B.

AU - Bruckner, W.

AU - Brull, A.

AU - Budz, P.

AU - Bulten, H.J.

AU - Capitani, G.P.

AU - Carter, P.

AU - Chumney, P.

AU - Cisbani, E.

AU - Court, G.R.

AU - Dalpiaz, P.F.

AU - De Leo, R.

AU - De Nardo, L.

AU - De Sanctis, E.

AU - De Schepper, D.

AU - Devitsin, E.

AU - Huberts, P.K.A.D.

AU - Di Nezza, P.

AU - Djordjadze, V.

AU - Duren, M.

AU - Dvoredsky, A.

AU - Elbakian, G.

AU - Ely, J.

AU - Fantoni, A.

AU - Fechtchenko, A.

AU - Ferro-Luzzi, M.

AU - Fiedler, K.

AU - van den Brand, J.F.J.

AU - HERMES Collaboration

PY - 2000/11/1

Y1 - 2000/11/1

N2 - Measurements of the cross section for exclusive virtual-photoproduction of rho (0) mesons from hydrogen are reported. The data were collected by the HERMES experiment using 27.5 GeV positrons incident on a hydrogen gas target in the HERA storage ring. The invariant mass W of the photon-nucleon system ranges from 4.0 to 6.0 GeV, while the negative squared four-momentum Q(2) Of the virtual photon varies from 0.7 to 5.0 GeV2. The present data together with roost of the previous data in the intermediate W-domain are well described by a model that infers the W-dependence of the cross section from the dependence on the Bjorken scaling variables of the unpolarized structure function for deep-inelastic scattering. In addition, a model calculation based on OR-Forward Parton Distributions gives a fairly good account of the longitudinal component of the rho (0) production cross section for Q(2) > 2 GeV2.

AB - Measurements of the cross section for exclusive virtual-photoproduction of rho (0) mesons from hydrogen are reported. The data were collected by the HERMES experiment using 27.5 GeV positrons incident on a hydrogen gas target in the HERA storage ring. The invariant mass W of the photon-nucleon system ranges from 4.0 to 6.0 GeV, while the negative squared four-momentum Q(2) Of the virtual photon varies from 0.7 to 5.0 GeV2. The present data together with roost of the previous data in the intermediate W-domain are well described by a model that infers the W-dependence of the cross section from the dependence on the Bjorken scaling variables of the unpolarized structure function for deep-inelastic scattering. In addition, a model calculation based on OR-Forward Parton Distributions gives a fairly good account of the longitudinal component of the rho (0) production cross section for Q(2) > 2 GeV2.

KW - NONFORWARD PARTON DISTRIBUTIONS

KW - VECTOR-MESONS

KW - DIFFRACTIVE PRODUCTION

KW - PHI ELECTROPRODUCTION

KW - COMPTON-SCATTERING

KW - NUCLEON

KW - RHO(0)

KW - HERA

KW - PHYSICS

KW - QCD

U2 - 10.1007/s100520000483

DO - 10.1007/s100520000483

M3 - Article

SN - 1434-6044

VL - 17

SP - 389

EP - 398

JO - European Physical Journal C

JF - European Physical Journal C

IS - 3

ER -