Proton and deuteron F{sub 2} structure function at low Q{sup 2}

Journal Article · Sat May 15 04:00:00 EDT 2010 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.81.055207· OSTI ID:21389059

Tvaskis, V ^[1]; Arrington, J; Potterveld, D H ^[2]; Asaturyan, R; Mkrtchyan, H; Stepanyan, S; Tadevosian, V ^[3]; Baker, O K; Christy, M E; Cochran, A; Gasparian, A ^[4]; Blok, H P ^[1]; Bosted, P; Ent, R; Mack, D J; Smith, G; Wood, S A ^[5]; Boswell, M ^[6]; Bruell, A ^[7]; Filippone, B W ^[8]

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1. VU University, 1081 HV Amsterdam (Netherlands)
2. Argonne National Laboratory, Argonne, Illinois 60439 (United States)
3. Yerevan Physics Institute, 375036, Yerevan (Armenia)
4. Hampton University, Hampton, Virginia 23668 (United States)
5. Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606 (United States)
6. Randolph-Macon Woman's College, Lynchburg, Virginia 24503 (United States)
7. Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)
8. California Institute of Technology, Pasadena, California 91125 (United States)

Measurements of the proton and deuteron F{sub 2} structure functions are presented. The data, taken at Jefferson Lab Hall C, span the four-momentum transfer range 0.06<Q{sup 2}<2.8 GeV{sup 2} and Bjorken x values from 0.009 to 0.45, thus extending the knowledge of F{sub 2} to low values of Q{sup 2} at low x. Next-to-next-to-leading-order calculations using recent parton distribution functions start to deviate from the data for Q{sup 2}<2 GeV{sup 2} at the low and high x values. Down to the lowest value of Q{sup 2}, the structure function is in good agreement with a parametrization of F{sub 2} based on data that have been taken at much higher values of Q{sup 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{sup 2} at low Q{sup 2}.

• OSTI ID: 21389059
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 5 Vol. 81; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ACCELERATORS
BARYONS
BOSONS
CEBAF ACCELERATOR
CHARGED PARTICLES
DEUTERONS
DISTRIBUTION FUNCTIONS
ELEMENTARY PARTICLES
FERMIONS
FOUR MOMENTUM TRANSFER
FUNCTIONS
HADRONS
LINEAR ACCELERATORS
MASSLESS PARTICLES
MOMENTUM TRANSFER
NUCLEONS
PHOTONS
PROTONS
STRUCTURE FUNCTIONS