rpp2010-rev-structure-function-figs

rpp2010-rev-structure-function-figs - 16 Structure...

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Unformatted text preview: 16. Structure functions 1 NOTE: THE FIGURES IN THIS SECTION ARE INTENDED TO SHOW THE REPRESENTATIVE DATA. THEY ARE NOT MEANT TO BE COMPLETE COMPILATIONS OF ALL THE WORLD’S RELIABLE DATA. Q 2 (GeV 2 ) F 2 (x,Q 2 ) * 2 i x H1 ZEUS BCDMS E665 NMC SLAC 10-3 10-2 10-1 1 10 10 2 10 3 10 4 10 5 10 6 10 7 10 8 10 9 10-1 1 10 10 2 10 3 10 4 10 5 10 6 Figure 16.7: The proton structure function F p 2 measured in electromagnetic scattering of positrons on protons (collider experiments ZEUS and H1), in the kinematic domain of the HERA data, for x > 0.00006 ( cf. Fig. 16.10 for data at smaller x and Q 2 ), and for electrons (SLAC) and muons (BCDMS, E665, NMC) on a fixed target. Statistical and systematic errors added in quadrature are shown. The data are plotted as a function of Q 2 in bins of fixed x . Some points have been slightly offset in Q 2 for clarity. The ZEUS binning in x is used in this plot; all other data are rebinned to the x values of the ZEUS data. For the purpose of plotting, F p 2 has been multiplied by 2 i x , where i x is the number of the x bin, ranging from i x = 1 ( x = 0 . 85) to i x = 28 ( x = 0 . 000063). References: H1 —C. Adloff et al. , Eur. Phys. J. C21 , 33 (2001); C. Adloff et al. , Eur. Phys. J. C30 , 1 (2003); ZEUS —S. Chekanov et al. , Eur. Phys. J. C21 , 443 (2001); S. Chekanov et al. , Phys. Rev. D70 , 052001 (2004); BCDMS —A.C. Benvenuti et al. , Phys. Lett. B223 , 485 (1989) (as given in [55]) ; E665 —M.R. Adams et al. , Phys. Rev. D54 , 3006 (1996); NMC —M. Arneodo et al. , Nucl. Phys. B483 , 3 (1997); SLAC —L.W. Whitlow et al. , Phys. Lett. B282 , 475 (1992). 2 16. Structure functions Q 2 (GeV 2 ) F 2 (x,Q 2 )*2 i x BCDMS E665 NMC SLAC 10-3 10-2 10-1 1 10 10 2 10 3 10 4 10 5 10 6 10 7 10 8 10 9 10-1 1 10 10 2 Figure 16.8: The deuteron structure function F d 2 measured in electromagnetic scattering of electrons (SLAC) and muons (BCDMS, E665, NMC) on a fixed target, shown as a function of Q 2 for bins of fixed x . Statistical and systematic errors added in quadrature are shown. For the purpose of plotting, F d 2 has been multiplied by 2 i x , where i x is the number of the x bin, ranging from 1 ( x = 0 . 85) to 29 ( x = 0 . 0009). References: BCDMS —A.C. Benvenuti et al. , Phys. Lett. B237 , 592 (1990). E665, NMC, SLAC —same references as Fig. 16.7. 16. Structure functions 3 Q 2 (GeV 2 ) F 2 (x,Q 2 )+c(x) CCFR NMC NuTeV 0.2 0.4 0.6 0.8 1 1.2 1 10 10 2 10 3 Figure 16.9: The deuteron structure function F 2 measured in deep inelastic scattering of muons on a fixed target (NMC) is compared to the structure function F 2 from neutrino-iron scattering (CCFR and NuTeV) using F μ 2 = (5 / 18) F ν 2 − x ( s + s ) / 6, where heavy-target effects have been taken into account. The data are shown versus Q 2 , for bins of fixed x . The NMC data have been rebinned to CCFR and NuTeV x values. Statistical and systematic errors added in quadrature are shown. For the purpose of plotting, a constant c ( x ) = 0 . 05 i x is added to...
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rpp2010-rev-structure-function-figs - 16 Structure...

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