Deep inelastic cross-section measurements at large<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>y</mml:mi></mml:math>with the ZEUS detector at HERA

Abramowicz, H.; Abt, I.; Adamczyk, L.; Adamus, M.; Aggarwal, R.; Antonelli, S.; Arslan, O.; Aushev, V.; Aushev, Y.; Bachynska, O.; Barakbaev, A. N.; Bartosik, N.; Behnke, O.; Behr, J.; Behrens, U.; Bertolin, A.; Bhadra, S.; Bloch, I.; Bokhonov, V.; Boos, E.; Borras, K.; Brock, I.; Brugnera, R.; Bruni, A.; Brzozowska, B.; Bussey, P.; Caldwell, A.; Capua, M.; Catterall, C. D.; Chwastowski, J. J.; Ciborowski, J.; Ciesielski, R.; Cooper-Sarkar, A. M.; Corradi, M.; Corriveau, F.; D’Agostini, G.; Dementiev, R. K.; Devenish, R.; Dolinska, G.; Drugakov, V.; Dusini, S.; Ferrando, J.; Figiel, J.; Foster, B.; Gach, G. P.; Garfagnini, A.; Geiser, A.; Gizhko, A.; Gladilin, L. K.; Gogota, O.; Golubkov, Yu. A.; Grebenyuk, J.; Gregor, I. M.; Grzelak, G.; Gueta, O.; Guzik, M. P.; Hain, W.; Hartner, G.; Hochman, D.; Hori, R.; Ibrahim, Zainol Abidin; Iga, Y.; Ishitsuka, M.; Iudin, A.; Januschek, F.; Каденко, І.; Kananov, S.; Kanno, T.; Karshon, U.; Kaur, M.; Kaur, P.; Khein, L. A.; Kisielewska, D.; Klanner, R.; Klein, U.; Kondrashova, N.; Kononenko, O.; Korol, Ie.; Korzhavina, I. A.; Kotański, A.; Kötz, U.; Kovalchuk, N.; Kowalski, H.; Kuprash, O.; Kuze, M.; Levchenko, B. B.; Levy, A.; Libov, V.; Limentani, S.; Lisovyi, M.; Lobodzinska, E.; Lohmann, W.; Löhr, B.; Lohrmann, E.; Longhin, A.; Lontkovskyi, D.; Lukina, O. Yu.; Maeda, J.; Makarenko, I.; Malka, J.; Martin, J. F.; Mergelmeyer, S.; Idris, F. Mohamad; Mujkic, K.; Myronenko, V.; Nagano, K.; Nigro, A.; Nobe, T.; Notz, D.; Nowak, R. J.; Olkiewicz, K.; Onishchuk, Y.; Paul, E.; Perlański, W.; Perrey, H.; Pokrovskiy, N. S.; Proskuryakov, A.S.; Przybycień, M.; Raval, A.; Roloff, P.; Rubinsky, I.; Ruspa, M.; Samojlov, V.; Saxon, D. H.; Schioppa, M.; Schmidke, W. B.; Schneekloth, U.; Schörner-Sadenius, T.; Schwartz, J.; Shcheglova, L.M.; Shevchenko, R.; Shkola, O.; Singh, Inderpal; Skillicorn, I. O.; Słomiński, W.; Sola, V.; Solano, A.; Спиридонов, А.; Stančo, L.; Stefaniuk, N.; Stern, A.; Stewart, T. P.; Stopa, P.; Sztuk-Dambietz, J.; Szuba, D.; Szuba, J.; Tassi, E.; Temiraliev, T.; Tokushuku, K.; Tomaszewska, J.; Trofymov, A.; Trusov, V.; Tsurugai, T.; Turcato, M.; Turkot, O.; Tymieniecka, T.; Verbytskyi, A.; Viazlo, O.; Walczak, R.; Abdullah, W. Wan; Wichmann, K.; Wing, M.; Wolf, G.; Yamada, S.; Yamazaki, Y.; Zakharchuk, N.; Żarnecki, A. F.; Zawiejski, L.; Zenaiev, O.; Zhautykov, B.O.; Zhmak, N.; Zotkin, D.S.

doi:10.1103/physrevd.90.072002

Cited by 43 publications

(28 citation statements)

References 135 publications

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“…As F L is typically very small it is a demanding quantity to study experimentally [41][42][43]. It is usually extracted through a Rosenbluth separation analysis.…”

Section: The Longitudinal Structure Functionmentioning

confidence: 99%

Nuclear structure functions at a future electron-ion collider

et al. 2017

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The quantitative knowledge of heavy nuclei's partonic structure is currently limited to rather large values of momentum fraction x-robust experimental constraints below x ∼ 10 −2 at low resolution scale Q 2 are particularly scarce. This is in sharp contrast to the free proton's structure which has been probed in Deep Inelastic Scattering (DIS) measurements down to x ∼ 10 −5 at perturbative resolution scales. The construction of an electron-ion collider (EIC) with a possibility to operate with a wide variety of nuclei, will allow one to explore the low-x region in much greater detail. In the present paper we simulate the extraction of the nuclear structure functions from measurements of inclusive and charm reduced cross sections at an EIC. The potential constraints are studied by analyzing simulated data directly in a next-toleading order global fit of nuclear Parton Distribution Functions based on the recent EPPS16 analysis. A special emphasis is placed on studying the impact an EIC would have on extracting the nuclear gluon parton distribution function, the partonic component most prone to nonlinear effects at low Q 2 . In comparison to the current knowledge, we find that the gluon parton distribution function can be measured at an EIC with significantly reduced uncertainties.

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“…As F L is typically very small it is a demanding quantity to study experimentally [41][42][43]. It is usually extracted through a Rosenbluth separation analysis.…”

Section: The Longitudinal Structure Functionmentioning

confidence: 99%

Nuclear structure functions at a future electron-ion collider

et al. 2017

View full text Add to dashboard Cite

show abstract

“…The kinematic coverage of this experiment (JLab E00-002) is shown in Fig. 1 together with the coverage of world data: CERN [3,4], DESY [5,6], Jefferson Lab [7,18], and SLAC [2,23]. The present data extend the kinematic range in x at fixed low Q 2 to allow for more detailed studies of the x dependence, as well as for more deuteron and proton comparisons.…”

Section: Introductionmentioning

confidence: 84%

“…The data in Fig. 6 are primarily from the recent DESY H1 and ZEUS experiments [5,6]. In this latter kinematic regime, the longitudinal structure function F L is dominated by the gluon parton distribution function, and is well described by the PDF parametrizations, which do include these data.…”

Section: -7mentioning

confidence: 99%

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

Tvaskis¹,

Tvaskis²,

Niculescu³

et al. 2018

Phys. Rev. C

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Structure functions, as measured in lepton-nucleon scattering, have proven to be very useful in studying the partonic dynamics within the nucleon. However, it is experimentally difficult to separately determine the longitudinal and transverse structure functions, and consequently there are substantially less data available in particular for the longitudinal structure function. Here, we present separated structure functions for hydrogen and deuterium at low four-momentum transfer squared, Q 2 < 1 GeV 2 , and compare them with parton distribution parametrization and k T factorization approaches. While differences are found, the parametrizations generally agree with the data, even at the very low-Q 2 scale of the data. The deuterium data show a smaller longitudinal structure function and a smaller ratio of longitudinal to transverse cross section, R, than the proton. This suggests 2469-9985/2018/97(4)/045204 (11) 045204-1 ©2018 American Physical Society V. TVASKIS et al.PHYSICAL REVIEW C 97, 045204 (2018) either an unexpected difference in R for the proton and the neutron or a suppression of the gluonic distribution in nuclei.

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“…Hence the improvement of the fit quality by adding the higher-twist corrections for Q 2 min = 1 GeV 2 is large and particularly pronounced for the fits using the NNLO DGLAP leading-twist part. Also a good description of the HERA F L data [12][13][14] is obtained down to the lowest measured values of Q 2 .…”

Section: Introduction and Conclusionmentioning

confidence: 99%

Evidence of quasi-partonic higher-twist effects in deep inelastic scattering at HERA at moderate $$Q^2$$ Q 2

et al. 2018

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The combined HERA data for the inclusive deep inelastic scattering (DIS) cross sections for the momentum transfer Q 2 > 1 GeV 2 are fitted within the DokshitzerGribov-Lipatov-Altarelli-Parisi (DGLAP) framework at next-to-leading order (NLO) and next-to-next-to-leading order (NNLO) accuracy, complemented by a QCD-inspired parameterisation of twist 4 corrections. A modified form of the input parton density functions is also included, motivated by parton saturation mechanism at small Bjorken x and at a low scale. These modifications lead to a significant improvement of the data description in the region of low Q 2 . For the whole data sample, the new benchmark NNLO DGLAP fit yields χ 2 /d.o.f.1.19 to be compared to 1.46 resulting from the standard NNLO DGLAP fit. We discuss the results in the context of the parton saturation picture and describe the impact of the higher-twist corrections on the derived parton density functions. The resulting description of the longitudinal proton structure function F L is consistent with the HERA data. Our estimates of higher-twist contributions to the proton structure functions are comparable to the leading-twist contributions at low Q 2 2 GeV 2 and x 10 −5 . The xdependence of the twist 4 corrections obtained from the best fit is consistent with the leading twist 4 quasi-partonic operators, corresponding to an exchange of four interacting gluons in the t-channel.

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Deep inelastic cross-section measurements at largeywith the ZEUS detector at HERA

Cited by 43 publications

References 135 publications

Nuclear structure functions at a future electron-ion collider

Nuclear structure functions at a future electron-ion collider

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

Evidence of quasi-partonic higher-twist effects in deep inelastic scattering at HERA at moderate $$Q^2$$ Q 2

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