Proton and deuteron F2 structure function at low Q2

被引：14

作者：

Tvaskis, V. ^{[1
,2
,3
]}

Arrington, J. ^{[4
]}

Asaturyan, R. ^{[5
]}

Baker, O. K. ^{[3
]}

Blok, H. P. ^{[1
,2
]}

Bosted, P. ^{[6
]}

Boswell, M. ^{[7
]}

Bruell, A. ^{[8
]}

Christy, M. E. ^{[3
]}

Cochran, A. ^{[3
]}

Ent, R. ^{[6
]}

Filippone, B. W. ^{[9
]}

Gasparian, A. ^{[3
]}

Keppel, C. E. ^{[3
,6
]}

Kinney, E. ^{[10
]}

Lapikas, L. ^{[2
]}

Lorenzon, W. ^{[11
]}

Mack, D. J. ^{[6
]}

Mammei, J. ^{[12
]}

Martin, J. W. ^{[9
]}

Mkrtchyan, H. ^{[5
]}

Niculescu, I. ^{[13
]}

Piercey, R. B. ^{[14
]}

Potterveld, D. H. ^{[4
]}

Smith, G. ^{[6
]}

Spurlock, K. ^{[14
]}

van der Steenhoven, G. ^{[2
]}

Stepanyan, S. ^{[5
]}

Tadevosian, V. ^{[5
]}

Wood, S. A. ^{[6
]}

机构：

[1] Vrije Univ Amsterdam, NL-1081 HV Amsterdam, Netherlands

[2] Natl Inst Subatom Phys Nikhef, NL-1009 DB Amsterdam, Netherlands

[3] Hampton Univ, Hampton, VA 23668 USA

[4] Argonne Natl Lab, Argonne, IL 60439 USA

[5] Yerevan Phys Inst, Yerevan 375036, Armenia

[6] Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA

[7] Randolph Macon Womans Coll, Lynchburg, VA 24503 USA

[8] MIT, Cambridge, MA 02139 USA

[9] CALTECH, Pasadena, CA 91125 USA

[10] Univ Colorado, Boulder, CO 80309 USA

[11] Univ Michigan, Ann Arbor, MI 48109 USA

[12] Juniata Coll, Huntingdon, PA 16652 USA

[13] George Washington Univ, Washington, DC 20052 USA

[14] Mississippi State Univ, Mississippi State, MS 39762 USA

来源：

PHYSICAL REVIEW C | 2010年 / 81卷 / 05期

基金：

美国国家科学基金会;

关键词：

HIGH STATISTICS MEASUREMENT; INELASTIC MUON SCATTERING; R=SIGMA-L/SIGMA-T; ELECTROMAGNETIC CORRECTIONS; REGION;

D O I：

10.1103/PhysRevC.81.055207

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

Measurements of the proton and deuteron F-2 structure functions are presented. The data, taken at Jefferson Lab Hall C, span the four-momentum transfer range 0.06 < Q(2) < 2.8 GeV2 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 GeV2 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).

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