Nuclear final-state interactions in deep inelastic scattering off the lightest nuclei

M. Sargsian; W. Cosyn

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Nuclear final-state interactions in deep inelastic scattering off the lightest nuclei

W. Cosyn, M. Sargsian

Nuclear Theory · Submitted 20 Apr 2017

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

The authors' main claim Such extrapolation allows an extraction of the neutron structure function in a model independent way due to suppression of the final-state interaction in the on-shell limit of the struck nucleon propagator.

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We review recent progress in studies of nuclear final-state interactions in deep inelastic scattering (DIS) off the lightest nuclei tagged by a recoil nucleon. These processes hold a lot of potential for resolving the outstanding issues related to the dynamics of hadronization in QCD. Within the minimal Fock component framework, valid at large Bjorken $x$, the main features of the theoretical approach based on the virtual nucleon approximation are elaborated. In this approach, the strong final-state interaction of the DIS products with the nuclear fragments is described by an effective eikonal amplitude, whose parameters can be extracted from the analysis of semi-inclusive DIS off the deuteron target. The extraction of the $Q^2$ and $W$ mass dependences of these parameters gives a new observable in studying the QCD structure of DIS final states. Another important feature of tagged DIS off the lightest nuclei is the possibility of performing pole extrapolation with a high degree of accuracy. Such extrapolation allows an extraction of the neutron structure function in a model independent way due to suppression of the final-state interaction in the on-shell limit of the struck nucleon propagator. We review the first application of the pole extrapolation to recent experimental data. Finally, we outline the extension of the framework to inclusive DIS, including a polarized deuteron target as well as its application to the tagged DIS reactions for future experiments at fixed target and collider energies.

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#	sentence	role	the authors' own work	states the main conclusion	strength
s0	We review recent progress in studies of nuclear final-state interactions in deep inelastic scattering (DIS) off the lightest nuclei tagged by a recoil nucleon.	contribution 0.73	0.21	0.07	asserted 0.80
s1	These processes hold a lot of potential for resolving the outstanding issues related to the dynamics of hadronization in QCD.	background 0.74	0.06	0.13	hedged possibility 0.58
s2	Within the minimal Fock component framework, valid at large Bjorken $x$, the main features of the theoretical approach based on the virtual nucleon approximation are elaborated.	method 0.90	0.37	0.06	asserted 0.96
s3	In this approach, the strong final-state interaction of the DIS products with the nuclear fragments is described by an effective eikonal amplitude, whose parameters can be extracted from the analysis of semi-inclusive DIS off the deuteron target.	method 0.99	0.18	0.08	asserted 1.00
s4	The extraction of the $Q^2$ and $W$ mass dependences of these parameters gives a new observable in studying the QCD structure of DIS final states.	interpretation 0.48	0.46	0.15	asserted 0.99
s5	Another important feature of tagged DIS off the lightest nuclei is the possibility of performing pole extrapolation with a high degree of accuracy.	contribution 0.40	0.13	0.08	asserted 0.54
s6	Such extrapolation allows an extraction of the neutron structure function in a model independent way due to suppression of the final-state interaction in the on-shell limit of the struck nucleon propagator.	method 0.78	0.14	0.18	asserted 0.91
s7	We review the first application of the pole extrapolation to recent experimental data.	contribution 0.97	0.78	0.09	asserted 0.92
s8	Finally, we outline the extension of the framework to inclusive DIS, including a polarized deuteron target as well as its application to the tagged DIS reactions for future experiments at fixed target and collider energies.	future work 0.95	0.53	0.10	asserted 0.75

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Original abstract

We review recent progress in studies of nuclear final-state interactions in deep inelastic scattering (DIS) off the lightest nuclei tagged by a recoil nucleon. These processes hold a lot of potential for resolving the outstanding issues related to the dynamics of hadronization in QCD. Within the minimal Fock component framework, valid at large Bjorken $x$, the main features of the theoretical approach based on the virtual nucleon approximation are elaborated. In this approach, the strong final-state interaction of the DIS products with the nuclear fragments is described by an effective eikonal amplitude, whose parameters can be extracted from the analysis of semi-inclusive DIS off the deuteron target. The extraction of the $Q^2$ and $W$ mass dependences of these parameters gives a new observable in studying the QCD structure of DIS final states. Another important feature of tagged DIS off the lightest nuclei is the possibility of performing pole extrapolation with a high degree of accuracy. Such extrapolation allows an extraction of the neutron structure function in a model independent way due to suppression of the final-state interaction in the on-shell limit of the struck nucleon propagator. We review the first application of the pole extrapolation to recent experimental data. Finally, we outline the extension of the framework to inclusive DIS, including a polarized deuteron target as well as its application to the tagged DIS reactions for future experiments at fixed target and collider energies.

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6 arXiv papers cite this in 6 sentences

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Papers whose main result relates to this one's

Found among the papers closest to this one by title and main claim. Pith's classifier compared each pair's main results and a second model family confirmed the relation; checked against two further families, shown conflicts agreed 118 times in 120 and shown same results 218 times in 239. The quoted sentence is the other paper's main claim.

States the same result 1 paper

We demonstrate that in the extrapolation the final state interaction amplitudes are smooth functions of $t$ and have negligible contribution in the extracted ``free'' nucleon structure function.

Model independent method for determination of the DIS structure of free neutron · 0.85

Papers citing it · 5 sentences without a confident label

Cites it as background 1 paper

The GPDs of a deuteron have been already defined through the matrix operators on the light front [ref] , and the partonic structures and FFs of the deuteron have been formally explored through different approaches as well [ref] .

$\rho$ meson unpolarized generalized parton distributions with a light-front constituent quark model · Introduction · 0.99

What it cites · 77 sentences without a confident label

Uses the method or tool of 6 papers

In practice for the tagged DIS process of Eq. ([ref]) the pole extrapolation is carried out by multiplying the measured quantity [e.g. the $ϕ$-averaged cross section of Eq. ([ref])] by a factor $I(α_s,p_s⊥,t)$ [ref] which cancels the $(t-m_N^2)^2$ pole and is normalized in such a way that the structure function of interest is recovered at the on-shell point.

Model independent method for determination of the DIS structure of free neutron · General concept and application to the neutron structure function · 0.93
One method that circumvents several of the issues outlined above, is performing the pole extrapolation procedure to the reaction ([ref]) in DIS kinematics in which the spectator proton is measured at smaller momenta [ref] .

High x Structure Function of the Virtually Free Neutron · General concept and application to the neutron structure function · 0.93
One method that circumvents several of the issues outlined above, is performing the pole extrapolation procedure to the reaction ([ref]) in DIS kinematics in which the spectator proton is measured at smaller momenta [ref] .

Extraction of neutron structure from tagged structure functions · General concept and application to the neutron structure function · 0.93

Uses data or values from 1 paper

The $A_zz$ tensor asymmetry was measured by the Hermes collaboration [ref] for $0.01<x<0.45$ at $0.5 < Q^2 < 5$ GeV$^2$, finding non-zero values which exhibit a sign change around $x ≈0.3$.

First Measurement of the Tensor Structure Function $b_1$ of the Deuteron · Final-state interaction effects in DIS from tensor polarized deuteron · 0.93

Compares with 5 papers

In the $x<0.5$ region, the extracted values are in good agreement with the existing phenomenological fit of inclusive data [ref] and with the BONuS result [ref] .

Empirical Fit to Inelastic Electron-Deuteron and Electron-Neutron Resonance Region Transverse Cross Sections · Pole extrapolation of BONuS data · 1.00
In the $x<0.5$ region, the extracted values are in good agreement with the existing phenomenological fit of inclusive data [ref] and with the BONuS result [ref] .

Empirical Fit to Precision Inclusive Electron-Proton Cross Sections in the Resonance Region · Pole extrapolation of BONuS data · 1.00
In the $x<0.5$ region, the extracted values are in good agreement with the existing phenomenological fit of inclusive data [ref] and with the BONuS result [ref] .

Measurement of the neutron F2 structure function via spectator tagging with CLAS · Pole extrapolation of BONuS data · 1.00

Cites as background 11 papers

There are several theoretical approaches in describing inclusive DIS from a deeply bound nucleon in the nucleus [ref] , ranging from models in which the deuteron is treated non-relativistically with off-shell effects included in the leading twist approximation, to models in which the scattering process is described in the light-front reference frame which allows to suppress the negative energy contributions in the bound nucleon propagator (referred to as $Z$-graphs).

Neutron structure function and inclusive DIS from H-3 and He-3 at large Bjorken-x · Virtual nucleon approximation · 0.99
There are several theoretical approaches in describing inclusive DIS from a deeply bound nucleon in the nucleus [ref] , ranging from models in which the deuteron is treated non-relativistically with off-shell effects included in the leading twist approximation, to models in which the scattering process is described in the light-front reference frame which allows to suppress the negative energy contributions in the bound nucleon propagator (referred to as $Z$-graphs).

Global Study of Nuclear Structure Functions · Virtual nucleon approximation · 0.99
There are several theoretical approaches in describing inclusive DIS from a deeply bound nucleon in the nucleus [ref] , ranging from models in which the deuteron is treated non-relativistically with off-shell effects included in the leading twist approximation, to models in which the scattering process is described in the light-front reference frame which allows to suppress the negative energy contributions in the bound nucleon propagator (referred to as $Z$-graphs).

Clustering aspects in nuclear structure functions · Virtual nucleon approximation · 0.99

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