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Proton and deuteron F_2 structure function at low Q^2

Tvaskis, V. and Arrington, J. and Asaturyan, R. and Baker, O. K. and Blok, H. P. and Bosted, P. and Boswell, M. and Bruell, A. and Christy, M. E. and Cochran, A. and Ent, R. and Filippone, B. W. and Gasparian, A. and Keppel, C. E. and Kinney, E. and Lapikás, L. and Lorenzon, W. and Mack, D. J. and Mammei, J. and Martin, J. W. and Mkrtchyan, H. and Niculescu, I. and Piercey, R. B. and Potterveld, D. H. and Smith, G. and Spurlock, K. and van der Steenhoven, G. and Stepanyan, S. and Tadevosyan, V. and Wood, S. A. (2010) Proton and deuteron F_2 structure function at low Q^2. Physical Review C, 81 (5). 055207. ISSN 0556-2813.

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Measurements of the proton and deuteron F2 structure functions are presented. The data, taken at Jefferson Lab Hall C, span the four-momentum transfer range 0.06 < Q^2 < 2.8 GeV^2 and Bjorken x values from 0.009 to 0.45, thus extending the knowledge of F_2 to low values of Q^2 at low x. Next-to-next-to-leading-order calculations using recent parton distribution functions start to deviate from the data for Q^2 < 2 GeV^2 at the low and high x values. Down to the lowest value of Q^2, the structure function is in good agreement with a parametrization of F_2 based on data that have been taken at much higher values of Q^2 or much lower values of x, and which are constrained by data at the photon point. The ratio of the deuteron and proton structure functions at low x remains well described by a logarithmic dependence on Q^2 at low Q^2.

Item Type:Article
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Filippone, B. W.0000-0002-2618-2688
Additional Information:© 2010 American Physical Society. Received 26 January 2010; published 19 May 2010. This work is supported in part by research grants from the US Department of Energy, the US National Science Foundation, and the Stichting voor Fundamenteel Onderzoek der Materie (FOM) of the Netherlands. The Southeastern Universities Research Association operates the Thomas Jefferson National Accelerator Facility under the US Department of Energy Contract No. DEAC05-84ER40150.
Funding AgencyGrant Number
U. S. Department of EnergyUNSPECIFIED
Stichting voor Fundamenteel Onderzoek der Materie (FOM) of the NetherlandsUNSPECIFIED
Issue or Number:5
Classification Code:PACS: 14.20.Dh, 13.60.Hb, 12.38.Qk, 24.85.+p
Record Number:CaltechAUTHORS:20100616-113533670
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:18706
Deposited By: Jason Perez
Deposited On:16 Jun 2010 22:15
Last Modified:09 Mar 2020 13:18

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