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|a (TOE)ost1035548
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|a (TOE)1035548
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|a E 1.99: arxiv:1105.6364
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|a E 1.99:jlab-thy-11-1377
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|a E 1.99: doe/or/23177-1694
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|a E 1.99: arxiv:1105.6364
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|a jlab-thy-11-1377
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|a doe/or/23177-1694
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|a arxiv:1105.6364
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|a Realizing vector meson dominance with transverse charge densities
|h [electronic resource]
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|a Washington, D.C. :
|b United States. Dept. of Energy. Office of Science ;
|a Oak Ridge, Tenn. :
|b distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy,
|c 2011.
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| 300 |
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|a 045205 (14 pages) :
|b digital, PDF file.
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| 336 |
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|a text
|b txt
|2 rdacontent.
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|a computer
|b c
|2 rdamedia.
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|a online resource
|b cr
|2 rdacarrier.
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|a Published through the Information Bridge: DOE Scientific and Technical Information.
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|a 10/01/2011.
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|a "jlab-thy-11-1377"
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|a " doe/or/23177-1694"
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|a " arxiv:1105.6364"
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|a Physical Review, C (Nuclear Physics) 84 4 ISSN 0556-2813; PRVCAN.
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|a Gerald Miller, Mark Strikman, Christian.
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3 |
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|a The transverse charge density in a fast-moving nucleon is represented as a dispersion integral of the imaginary part of the Dirac form factor in the timelike region (spectral function). At a given transverse distance b the integration effectively extends over energies in a range √t ≈< 1/b, with exponential suppression of larger values. The transverse charge density at peripheral distances thus acts as a low-pass filter for the spectral function and allows one to select energy regions dominated by specific t-channel states, corresponding to definite exchange mechanisms in the spacelike form factor. We show that distances b ≈ 0.5 - 1.5 fm in the isovector density are maximally sensitive to the ρ meson region, with only a ≈10% contribution from higher-mass states. Soft-pion exchange governed by chiral dynamics becomes relevant only at larger distances. In the isoscalar density higher-mass states beyond the ω are comparatively more important. The dispersion approach suggests that the positive transverse charge density in the neutron at b ≈ 1 fm, found previously in a Fourier analysis of spacelike form factor data, could serve as a sensitive test of the isoscalar strength in the ≈1 GeV mass region. In terms of partonic structure, the transverse densities in the vector meson region b ≈ 1 fm support an approximate mean-field picture of the motion of valence quarks in the nucleon.
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| 536 |
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|b AC05-06OR23177.
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| 650 |
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7 |
|a Fourier Analysis.
|2 local.
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| 650 |
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|a Vector Mesons.
|2 local.
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| 650 |
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|a Neutrons.
|2 local.
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|a Spectral Functions.
|2 local.
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|a Isovectors.
|2 local.
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|a Nucleons.
|2 local.
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|a Mesons.
|2 local.
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| 650 |
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|a Quarks.
|2 local.
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| 650 |
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|a Valence.
|2 local.
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| 650 |
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|a Form Factors.
|2 local.
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| 650 |
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7 |
|a Dirac Form Factors.
|2 local.
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| 650 |
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|a T Channel.
|2 local.
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| 650 |
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|a Charge Density.
|2 local.
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| 650 |
|
7 |
|a Physics Of Elementary Particles And Fields.
|2 edbsc.
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| 710 |
2 |
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|a Thomas Jefferson National Accelerator Facility (U.S.).
|4 res.
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| 710 |
1 |
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|a United States.
|b Department of Energy.
|b Office of Science.
|4 spn.
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| 710 |
1 |
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|a United States.
|b Department of Energy.
|b Office of Scientific and Technical Information.
|4 dst.
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| 856 |
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|u http://www.osti.gov/servlets/purl/1035548/
|z Online Access
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| 907 |
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|a .b70773646
|b 03-07-23
|c 04-04-12
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| 998 |
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|a web
|b 04-04-12
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| 952 |
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|p Can circulate
|a University of Colorado Boulder
|b Online
|c Online
|d Online
|e E 1.99: arxiv:1105.6364
|h Superintendent of Documents classification
|i web
|n 1
|
