Ioffe Times in DIS from a Dipole Model Fit

Andreas von Manteuffel; Carlo Ewerz; Otto Nachtmann

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Ioffe Times in DIS from a Dipole Model Fit

Carlo Ewerz, Andreas von Manteuffel, Otto Nachtmann

High Energy Physics - Phenomenology · Submitted 13 Sep 2009

abstract compiled · 2026-09-23 · no language-model review

The authors' main claim Based on our results we discuss consequences for the limitations of applicability of the dipole picture.

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What the abstract itself states, as probabilities: claims first 0.03 · states limitation 0.69 · human participants 0.01 · controlled comparison 0.03 · randomized assignment 0.01 · states quantitative result 0.97 · compares with prior results 0.12 · mentions code or data availability 0.02.

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We present a study of Ioffe times in deep inelastic electron-proton scattering. We deduce 'experimental' Ioffe-time distributions from the small-x HERA data as described by a particular colour-dipole-model fit. We show distributions for three representative gamma*-proton c.m. energies W and various values of the photon virtuality Q^2. These distributions are rather broad for transversely and very narrow for longitudinally polarised virtual photons. The Ioffe times for W=150 GeV, for example, range from around 1000 fm for Q^2=1 GeV^2 to around 10 fm for Q^2=100 GeV^2. Based on our results we discuss consequences for the limitations of applicability of the dipole picture.

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What the classifier reports for each sentence. The number is the probability it gave the label.
#	sentence	role	the authors' own work	states the main conclusion	strength
s0	We present a study of Ioffe times in deep inelastic electron-proton scattering.	contribution 0.99	0.87	0.05	asserted 0.85
s1	We deduce 'experimental' Ioffe-time distributions from the small-x HERA data as described by a particular colour-dipole-model fit.	method 0.81	0.93	0.10	asserted 1.00
s2	We show distributions for three representative gamma*-proton c.m. energies W and various values of the photon virtuality Q^2.	result 0.50	0.90	0.06	asserted 1.00
s3	These distributions are rather broad for transversely and very narrow for longitudinally polarised virtual photons.	result 1.00	0.89	0.19	asserted 0.99
s4	The Ioffe times for W=150 GeV, for example, range from around 1000 fm for Q^2=1 GeV^2 to around 10 fm for Q^2=100 GeV^2.	result 1.00	0.89	0.15	asserted 0.99
s5	Based on our results we discuss consequences for the limitations of applicability of the dipole picture.	interpretation 1.00	0.58	0.25	unclear 0.76

What kind of paper the classifier reports this is: simulation study 0.59 · evidence from analysis of existing data 0.99.

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Every quoted sentence on this record is the authors'. Every label is from Pith's closed vocabulary, with the probability shown beside it. Every number in the measurements table is the authors', checked by code. Record as JSON

The paper

Original abstract

We present a study of Ioffe times in deep inelastic electron-proton scattering. We deduce 'experimental' Ioffe-time distributions from the small-x HERA data as described by a particular colour-dipole-model fit. We show distributions for three representative gamma*-proton c.m. energies W and various values of the photon virtuality Q^2. These distributions are rather broad for transversely and very narrow for longitudinally polarised virtual photons. The Ioffe times for W=150 GeV, for example, range from around 1000 fm for Q^2=1 GeV^2 to around 10 fm for Q^2=100 GeV^2. Based on our results we discuss consequences for the limitations of applicability of the dipole picture.

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1 arXiv paper cite this in 1 sentence

Each citing sentence is taken from the citing paper's LaTeX source and typed by Pith's classifier. A label appears at probability 0.8 or more (0.95 for support), a contest at 0.7 or more; the quoted words are the citing authors'. How each label was checked · JSON

What it cites · 21 sentences without a confident label

Uses the method or tool of 3 papers

We shall choose the model of Golec-Biernat and Wüsthoff (GBW) [ref] for this purpose.

Saturation Effects in Deep Inelastic Scattering at low $Q^2$ and its Implications on Diffraction · Introduction · 0.97
With the assumptions spelled out in detail in section 6 of [ref] the diagram of figure [ref] gives [equation] Here $α$ is the longitudinal momentum fraction of the $γ^∗$ carried by the quark, $$ is the vector in transverse position space from the antiquark to the quark, $r=||$, and $λ$ and $λ'$ are the helicities of $q$ and $q̅$, respectively.

Towards a Nonperturbative Foundation of the Dipole Picture: II. High Energy Limit · Ioffe time and $ΔE$ distributions in the dipole picture · 0.94
We avoid numerical errors due to the large cancellations in sums like [ref] by proper rewriting, and we make sure that the integration error is under control by using different integration algorithms [ref] .

Cuba - a library for multidimensional numerical integration · Some technical details of the calculation · 1.00

Compares with 1 paper

From figure 9 of [ref] we see that, nevertheless, we found a very similar $Q^2$ range for the applicability of the dipole model.

On the Range of Validity of the Dipole Picture · Conclusions · 0.99

Cites as background 9 papers

The assumptions needed to arrive at the standard dipole picture of DIS are spelled out in detail in section 6.2 of [ref] .

Towards a Nonperturbative Foundation of the Dipole Picture: II. High Energy Limit · Photon wave functions and energy mismatch $ΔE$ · 0.90
A variety of such models has been constructed, see [ref] for some prominent examples and [ref] for overviews.

A Modification of the Saturation Model: DGLAP evolution · Introduction · 0.98
A variety of such models has been constructed, see [ref] for some prominent examples and [ref] for overviews.

Saturation and BFKL dynamics in the HERA data at small x · Introduction · 0.98

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