The total virtual photoabsorption cross section, deeply virtual Compton scattering and vector-meson production

Kuroda, Minpei; Schildknecht, Dieter

doi:10.1140/epjc/s2004-01986-x

Cited by 9 publications

(13 citation statements)

References 46 publications

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“…energies obtained at the Large Hadron Collider (LHC), we revive our predictions [2,3] on J/ψ production based on the color-dipole picture (CDP) 1 . As depicted in figs.…”

mentioning

confidence: 89%

“…In standard notation, |ψ T,L (r ⊥ , z(1 − z), Q 2 )| 2 denotes the probability for the photon of virtuality Q 2 to couple to a (qq) J=1 T,L state specified by the transverse size r ⊥ and the longitudinal momentum partition 0 ≤ z ≤ 1, and σ (qq) J =1 T,L p r ⊥ z(1 − z), W 2 denotes the (qq)-dipole-proton cross section at the total γ * p center-of-mass energy W . The two-gluon coupling of the qq dipole state requires a representation of the (qq)-color-dipole cross section of the form [3,4]…”

mentioning

confidence: 99%

“…A correction related to the contributions due to a (small) real part of the qq forward-production amplitude is ignored in (4) and(5) 3. Massless quarks are used in the derivation of (4) and(5).…”

mentioning

confidence: 99%

“…As depicted in figs. 1 and 2, the total photoabsorption cross section and the forward production of quark-antiquark states, γ * p → (q q) J=1 T,L p, of total spin J = 1 at low values of x ∼ = Q 2 /W 2 ≪ 1 are represented by [3,4]…”

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confidence: 99%

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Unique prediction for high-energy J / ψ photoproduction: Color transparency and saturation

Schildknecht

2017

Physics Letters B

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Based on the color-dipole picture, we present a successful parameter-free prediction for the recent high-energy J/ψ photoproduction data from the Large Hadron Collider. The experimental data provide empirical evidence for the transition from color transparency to saturation.Inspired by experimental data [1] on J/ψ photoproduction, γp → J/ψ p, at very high energies obtained at the Large Hadron Collider (LHC), we revive our predictions [2, 3] on J/ψ production based on the color-dipole picture (CDP) 1 . As depicted in figs. 1 and 2, the total photoabsorption cross section and the forward production of quark-antiquark states,T,L p, of total spin J = 1 at low values of x ∼ = Q 2 /W 2 ≪ 1 are represented by [3,4]

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“…energies obtained at the Large Hadron Collider (LHC), we revive our predictions [2,3] on J/ψ production based on the color-dipole picture (CDP) 1 . As depicted in figs.…”

mentioning

confidence: 89%

mentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Unique prediction for high-energy J / ψ photoproduction: Color transparency and saturation

Schildknecht

2017

Physics Letters B

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“…‡ Predictions for vector meson production, which require a discussion of the vector meson wavefunctions,can be found in [18,2]. § For an alternative investigation of the link between low-x DIS and DVCS and other exclusive proceses at high energy, see Kuroda and Schildknecht [20]. ¶ Note that throughout this paper the curves labelled 'FS04 no sat' correspond to the predictions of the FS04 Regge model.…”

Section: Deeply Virtual Compton Scatteringmentioning

confidence: 99%

Colour dipoles and the HERA data

Shaw¹

2007

Proceedings of Diffraction 06, International Workshop on Diffraction in High-Energy Physics — PoS(DIFF2006)

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We confront a very wide body of HERA diffractive electroproduction data with the predictions of the colour dipole model. In doing so we focus upon three different parameterisations of the dipole scattering cross-section, whose parameters are fixed by analysis of DIS structure function data. This analysis strongly suggests the presence of saturation effects, but is not definitive because the conclusion requires the inclusion of data at low-Q 2 values.Having fixed the parameters of the models from the DIS structure function data, the resulting dipole cross sections can be used to make genuine predictions for other reactions. Good agreement is obtained for all observables, as is illustrated here for deeply virtual Compton scattering(DVCS) and diffractive deep inelastic scattering(DDIS). There can be no doubting the success of the dipole scattering approach and more precise observations are needed in order to expose its limitations * This talk is based on work carried out in collaboration with J.R. Forshaw and R. Sandapen, [1,2]

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The energy dependence of the saturation scale in DIS at low x

Kuroda¹,

Schildknecht²

2005

Physics Letters B

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Consistency of the previously suggested color-dipole representation of deep-inelastic scattering (DIS_) and vector-meson production at low x with DGLAP evolution allows one to predict the exponent of the W^2 dependence of the saturation scale Lambda_sat^2(W^2) ~ (W^2)^C-2. One finds C_2^theory = 0.27 in agreement with the model-independent analysis of the experimental data from HERA on deep-inelastic electron scattering.Comment: 11 pages in LATEX, misprints correcte

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The total virtual photoabsorption cross section, deeply virtual Compton scattering and vector-meson production

Cited by 9 publications

References 46 publications

Unique prediction for high-energy J / ψ photoproduction: Color transparency and saturation

Unique prediction for high-energy J / ψ photoproduction: Color transparency and saturation

Colour dipoles and the HERA data

The energy dependence of the saturation scale in DIS at low x

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