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

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

doi:10.1103/PhysRevC.97.045204

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

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

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Abstract

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, Q2<1GeV2, and compare them with parton distribution parametrization and kT factorization approaches. While differences are found, the parametrizations generally agree with the data, even at the very low-Q2 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 either an unexpected difference in R for the proton and the neutron or a suppression of the gluonic distribution in nuclei.

Original language	English (US)
Article number	045204
Journal	Physical Review C
Volume	97
Issue number	4
DOIs	https://doi.org/10.1103/PhysRevC.97.045204
State	Published - Apr 26 2018

Bibliographical note

Funding Information:
This work was supported in part by the US Department of Energy under Grant No. DE-AC02-06CH11357 and the National Science Foundation under Grants No. PHY-0245045, No. PHY-0555510, No. PHY-0653440, and No. PHY-1002644.

Funding Information:
The authors thank A. Stasto for providing curves and guidance for utilization of the model in Ref. [12] . This work was supported by the US Department of Energy (DOE) under Grant No. DE-AC05-06OR23177, under which Jefferson Science Associates, LLC, operates Jefferson Lab. This work was supported in part by the US Department of Energy under Grant No. DE-AC02-06CH11357 and the National Science Foundation under Grants No. PHY-0245045, No. PHY-0555510, No. PHY-0653440, and No. PHY-1002644.

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© 2018 American Physical Society.

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10.1103/PhysRevC.97.045204

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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. L., Biselli, A., Blok, H. P., Boeglin, W. U., Bosted, P. E., Brash, E., ... Zihlmann, B. (2018). Measurements of the separated longitudinal structure function FL from hydrogen and deuterium targets at low Q2. Physical Review C, 97(4), [045204]. https://doi.org/10.1103/PhysRevC.97.045204

Tvaskis, V, Tvaskis, A, Niculescu, I, Abbott, D, Adams, GS, Afanasev, A, Ahmidouch, A, Angelescu, T, Arrington, J, Asaturyan, R, Avery, S, Baker, OK, Benmouna, N, Berman, BL, Biselli, A, Blok, HP, Boeglin, WU, Bosted, PE, Brash, E, Breuer, H, Chang, G, Chant, N, Christy, ME, Connell, SH, Dalton, MM, Danagoulian, S, Day, D, Dodario, T, Dunne, JA, Dutta, D, El Khayari, N, Ent, R, Fenker, HC, Frolov, VV, Gaskell, D, Garrow, K, Gilman, R, Gueye, P, Hafidi, K, Hinton, W, Holt, RJ, Horn, T, Huber, GM, Jackson, H, Jiang, X, Jones, MK, Joo, K, Kelly, JJ, Keppel, CE, Kuhn, J, Kinney, E, Klein, A, Kubarovsky, V, Liang, Y, Lolos, G, Lung, A, Mack, D, Malace, S, Markowitz, P, Mbianda, G, McGrath, E, McKee, D, Meekins, DG, Mkrtchyan, H, Napolitano, J, Navasardyan, T, Niculescu, G, Nozar, M, Ostapenko, T, Papandreou, Z, Potterveld, D, Reimer, PE, Reinhold, J, Roche, J, Rock, SE, Schulte, E, Segbefia, E, Smith, C, Smith, GR, Stoler, P, Tadevosyan, V, Tang, L, Telfeyan, J, Todor, L, Ungaro, M, Uzzle, A, Vidakovic, S, Villano, A, Vulcan, WF, Warren, G, Wesselmann, F, Wojtsekhowski, B, Wood, SA, Yan, C & Zihlmann, B 2018, 'Measurements of the separated longitudinal structure function FL from hydrogen and deuterium targets at low Q2', Physical Review C, vol. 97, no. 4, 045204. https://doi.org/10.1103/PhysRevC.97.045204

@article{2a4c96825e8e409cb73641e4160b9cfb,

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

abstract = "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, Q2<1GeV2, and compare them with parton distribution parametrization and kT factorization approaches. While differences are found, the parametrizations generally agree with the data, even at the very low-Q2 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 either an unexpected difference in R for the proton and the neutron or a suppression of the gluonic distribution in nuclei.",

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

note = "Funding Information: This work was supported in part by the US Department of Energy under Grant No. DE-AC02-06CH11357 and the National Science Foundation under Grants No. PHY-0245045, No. PHY-0555510, No. PHY-0653440, and No. PHY-1002644. Funding Information: The authors thank A. Stasto for providing curves and guidance for utilization of the model in Ref. [12] . This work was supported by the US Department of Energy (DOE) under Grant No. DE-AC05-06OR23177, under which Jefferson Science Associates, LLC, operates Jefferson Lab. This work was supported in part by the US Department of Energy under Grant No. DE-AC02-06CH11357 and the National Science Foundation under Grants No. PHY-0245045, No. PHY-0555510, No. PHY-0653440, and No. PHY-1002644. Publisher Copyright: {\textcopyright} 2018 American Physical Society.",

year = "2018",

month = apr,

day = "26",

doi = "10.1103/PhysRevC.97.045204",

language = "English (US)",

volume = "97",

journal = "Physical Review C",

issn = "2469-9985",

publisher = "American Physical Society",

number = "4",

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TY - JOUR

T1 - Measurements of the separated longitudinal structure function FL from hydrogen and deuterium targets at low Q2

AU - Tvaskis, V.

AU - Tvaskis, A.

AU - Niculescu, I.

AU - Abbott, D.

AU - Adams, G. S.

AU - Afanasev, A.

AU - Ahmidouch, A.

AU - Angelescu, T.

AU - Arrington, J.

AU - Asaturyan, R.

AU - Avery, S.

AU - Baker, O. K.

AU - Benmouna, N.

AU - Berman, B. L.

AU - Biselli, A.

AU - Blok, H. P.

AU - Boeglin, W. U.

AU - Bosted, P. E.

AU - Brash, E.

AU - Breuer, H.

AU - Chang, G.

AU - Chant, N.

AU - Christy, M. E.

AU - Connell, S. H.

AU - Dalton, M. M.

AU - Danagoulian, S.

AU - Day, D.

AU - Dodario, T.

AU - Dunne, J. A.

AU - Dutta, D.

AU - El Khayari, N.

AU - Ent, R.

AU - Fenker, H. C.

AU - Frolov, V. V.

AU - Gaskell, D.

AU - Garrow, K.

AU - Gilman, R.

AU - Gueye, P.

AU - Hafidi, K.

AU - Hinton, W.

AU - Holt, R. J.

AU - Horn, T.

AU - Huber, G. M.

AU - Jackson, H.

AU - Jiang, X.

AU - Jones, M. K.

AU - Joo, K.

AU - Kelly, J. J.

AU - Keppel, C. E.

AU - Kuhn, J.

AU - Kinney, E.

AU - Klein, A.

AU - Kubarovsky, V.

AU - Liang, Y.

AU - Lolos, G.

AU - Lung, A.

AU - Mack, D.

AU - Malace, S.

AU - Markowitz, P.

AU - Mbianda, G.

AU - McGrath, E.

AU - McKee, D.

AU - Meekins, D. G.

AU - Mkrtchyan, H.

AU - Napolitano, J.

AU - Navasardyan, T.

AU - Niculescu, G.

AU - Nozar, M.

AU - Ostapenko, T.

AU - Papandreou, Z.

AU - Potterveld, D.

AU - Reimer, P. E.

AU - Reinhold, J.

AU - Roche, J.

AU - Rock, S. E.

AU - Schulte, E.

AU - Segbefia, E.

AU - Smith, C.

AU - Smith, G. R.

AU - Stoler, P.

AU - Tadevosyan, V.

AU - Tang, L.

AU - Telfeyan, J.

AU - Todor, L.

AU - Ungaro, M.

AU - Uzzle, A.

AU - Vidakovic, S.

AU - Villano, A.

AU - Vulcan, W. F.

AU - Warren, G.

AU - Wesselmann, F.

AU - Wojtsekhowski, B.

AU - Wood, S. A.

AU - Yan, C.

AU - Zihlmann, B.

N1 - Funding Information: This work was supported in part by the US Department of Energy under Grant No. DE-AC02-06CH11357 and the National Science Foundation under Grants No. PHY-0245045, No. PHY-0555510, No. PHY-0653440, and No. PHY-1002644. Funding Information: The authors thank A. Stasto for providing curves and guidance for utilization of the model in Ref. [12] . This work was supported by the US Department of Energy (DOE) under Grant No. DE-AC05-06OR23177, under which Jefferson Science Associates, LLC, operates Jefferson Lab. This work was supported in part by the US Department of Energy under Grant No. DE-AC02-06CH11357 and the National Science Foundation under Grants No. PHY-0245045, No. PHY-0555510, No. PHY-0653440, and No. PHY-1002644. Publisher Copyright: © 2018 American Physical Society.

PY - 2018/4/26

Y1 - 2018/4/26

N2 - 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, Q2<1GeV2, and compare them with parton distribution parametrization and kT factorization approaches. While differences are found, the parametrizations generally agree with the data, even at the very low-Q2 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 either an unexpected difference in R for the proton and the neutron or a suppression of the gluonic distribution in nuclei.

AB - 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, Q2<1GeV2, and compare them with parton distribution parametrization and kT factorization approaches. While differences are found, the parametrizations generally agree with the data, even at the very low-Q2 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 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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UR - http://www.scopus.com/inward/citedby.url?scp=85046640060&partnerID=8YFLogxK

U2 - 10.1103/PhysRevC.97.045204

DO - 10.1103/PhysRevC.97.045204

M3 - Article

AN - SCOPUS:85046640060

SN - 2469-9985

VL - 97

JO - Physical Review C

JF - Physical Review C

IS - 4

M1 - 045204

ER -

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

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