Measurements of the separated longitudinal structure function 
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 from hydrogen and deuterium targets at low 
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Tvaskis, V.; Tvaskis, A.; Niculescu, I.; Abbott, D.; Adams, G. S.; Afanasev, A.; Ahmidouch, A.; Angelescu, T.; Arrington, J.; Asaturyan, R.; Avery, S.; Baker, O. K.; Benmouna, N.; Berman, B.; Biselli, A. S.; Blok, H. P.; Boeglin, W.; Bosted, P.; Brash, E. J.; Breuer, H.; Chang, G.; Chant, N. S.; Christy, M. E.; Connell, S. H.; Dalton, M. M.; Danagoulian, S.; Day, D.; Dodario, T.; Dunne, J.; Dutta, D.; Khayari, N. El; Ent, R.; Fenker, H.; Frolov, V. V.; Gaskell, D.; Garrow, K.; Gilman, R.; Guèye, P.; Hafidi, K.; Hinton, W.; Horn, T.; Huber, G. M.; Jackson, H. E.; Jiang, X.; Jones, M.; Joo, K.; Kelly, James; Keppel, C.; Kühn, J.; Kinney, E.; Klein, A.; Kubarovsky, V.; Liang, Y.; Lolos, G. J.; Lung, A.; Mack, D.; Malace, S.; Markowitz, P.; Mbianda, G.; McGrath, Elizabeth J.; McKee, D.; Meekins, D.; Mkrtchyan, H.; Napolitano, J.; Navasardyan, T.; Niculescu, G.; Nozar, M.; Ostapenko, T.; Papandreou, Z.; Potterveld, D. H.; Reimer, P. E.; Reinhold, J.; Roche, J.; Rock, S. E.; Schulte, E.; Segbefia, E.; Smith, C.; Smith, G. R.; Stoler, P.; Tadevosyan, V.; Tang, L.; Telfeyan, J.; Todor, L.; Ungaro, M.; Uzzle, A.; Vidakovic, S.; Villano, A. N.; Vulcan, W.; Warren, G.; Wesselmann, F. R.; Wojtsekhowski, B.; Wood, S. A.; Yan, Chenyu; Zihlmann, B.

doi:10.1103/physrevc.97.045204

Cited by 25 publications

(24 citation statements)

References 53 publications

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“…1 in Ref. [33] where a compilation of F L measurements is given. Only results from the JLab E99-118 [34], E94-110 [35], E00-002 [33], SLAC E140X [36] and SLAC GLOBAL analysis [37] extend to the edge of the low x non-perturbative region.…”

Section: Numerical Resultsmentioning

confidence: 99%

Longitudinal structure function $F_L$ at low $Q^2$ and low $x$ with model for higher twist: an update

Badelek,

Stasto

2022

Preprint

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A reanalysis of the model for the longitudinal structure function F L (x, Q 2 ) at low x and low Q 2 was undertaken, in view of the advent of the EIC. The model is based on the photon-gluon fusion mechanism suitably extrapolated to the region of low Q 2 . It includes the kinematic constraint F L ∼ Q 4 as Q 2 → 0 and higher twist contribution which vanishes as Q 2 → ∞. Revised model was critically updated and compared to the presently available data.

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Section: Numerical Resultsmentioning

confidence: 99%

Longitudinal structure function $F_L$ at low $Q^2$ and low $x$ with model for higher twist: an update

Badelek,

Stasto

2022

Preprint

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“…The 𝐹 2 data include the results of Ref. [22] on SLAC data as well as the measurements from JLab experiments [25,26,[29][30][31]47]. Table VII lists the values of 𝜒 2 per one data point for each 𝐹 2 data set.…”

Section: Discussionmentioning

confidence: 99%

“…In this comparison we use the 𝐹 2 extractions of Ref. [29,31] which were based on the Rosenbluth separation of 𝐹 𝑇 and 𝐹 𝐿 .…”

Section: Discussionmentioning

confidence: 99%

“…Since in our analysis we determine both, 𝐹 𝑇 and 𝐹 𝐿 , we apply our results to compute 𝑅 = 𝐹 𝐿 /𝐹 𝑇 and make a comparison with data on the structure function 𝑅. Figure 11 shows the measurements of 𝑅 [22,29,31,47,[51][52][53] as a function of 𝑊 2 together with our predictions (normalization uncertainties are not shown in Fig. 11).…”

Section: Discussionmentioning

confidence: 99%

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Hybrid model of proton structure functions

Kulagin,

Barinov

2021

Preprint

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We develop a "hybrid" model of the proton inelastic structure functions applicable for a wide region of invariant masses of produced states 𝑊 and invariant momentum transfer 𝑄 including deep inelastic scattering (DIS), nucleon resonance production as well as the region close to inelastic threshold. In the DIS region, we compute the structure functions in terms of the parton distributions together with higher-twist corrections which are determined from a global QCD fit. The resonant part is addressed in terms of the Breit-Wiegner contributions from five states: Δ(1232) resonance, 𝑁 (1440) Roper resonance, and three effective resonances describing the second and third resonance regions. The couplings of the nucleon resonances to photon are described in terms of helicity amplitudes. The nonresonant background is treated in terms of a smooth extrapolation of the DIS structure functions to low-𝑊 and low-𝑄 values with a proper inelastic threshold behavior and the real photon limit 𝑄 2 = 0 constrained by the photoproduction data. We independently treat the transverse, 𝐹 𝑇 , and the longitudinal, 𝐹 𝐿 , structure function and fix the model parameters from a global analysis of the electron-proton differential cross section data together with data on the total photoproduction cross section. We demonstrate a very good performance of the model by comparing our predictions with data on cross sections and the structure functions 𝐹 2 and 𝑅 = 𝐹 𝐿 /𝐹 𝑇 in the resonance and the DIS region.

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“…In this paper we revisit the question of the shape of thed −ū asymmetry in the light of a new global analysis of neutron structure functions [25] extracted from inclusive proton and deuteron DIS data from experiments at BCDMS [26], NMC [21,22], SLAC [27,28] and a new compilation of Jefferson Lab data [29]. Data obtained at matched kinematics -namely, obtained from both targets with one experimental apparatus, or within a single experiment at the same kinematic setting -were selected for this analysis [30][31][32][33][34][35][36][37][38]. Data providing ratios of the two targets, as well as a spectator-tagged neutron structure function [39,40] measurement, were also utilized.…”

Section: Introductionmentioning

confidence: 99%

On the shape of the d¯−u¯ asymmetry

Accardi¹,

Keppel²,

Li³

et al. 2020

Physics Letters B

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Using data from a recent reanalysis of neutron structure functions extracted from inclusive proton and deuteron deep-inelastic scattering (DIS), we re-examine the constraints on the shape of thed −ū asymmetry in the proton at large parton momentum fractions x. A global analysis of the proton-neutron structure function difference from BCDMS, NMC, SLAC and Jefferson Lab DIS measurements, and of Fermilab Drell-Yan lepton-pair production cross sections, suggests that existing data can be well described withd >ū for all values of x currently accessible. We compare the shape of the fittedd −ū distributions with expectations from nonperturbative models based on chiral symmetry breaking, which can be tested by upcoming Drell-Yan data from the SeaQuest experiment at larger values of x.

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Measurements of the separated longitudinal structure function FL from hydrogen and deuterium targets at low Q2

Cited by 25 publications

References 53 publications

Longitudinal structure function $F_L$ at low $Q^2$ and low $x$ with model for higher twist: an update

Longitudinal structure function $F_L$ at low $Q^2$ and low $x$ with model for higher twist: an update

Hybrid model of proton structure functions

On the shape of the d¯−u¯ asymmetry

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