Abstract
Based on a QCD analysis of the parton momentum distributions in the proton, the ratior v =d v /u v of thed andu valence quark distributions is determined as function ofx in the range 0.01<x<0.7. The analysis uses data from neutrino and antineutrino charged current interactions on hydrogen and deuterium, obtained with BEBC in the (anti)neutrino wideband beam of the CERN SPS. Since v mainly depends on the deuterium/hydrogen ratios of the normalisedx-y-Q 2-distributions many systematic effects cancel. It is found thatr v decreases with increasingx, and drops below the naiveSU(6) expectation of 0.5 forx≳0.3. An extrapolation ofr v tox=1 is consistent with the hypothesisr v (1)=0.
Similar content being viewed by others
References
G.T. Jones et al.: Z. Phys. C62 (1994) 575
U.F. Katz: Ph.D. Thesis, MPI-Preprint MPI-PhE/92-03 (1992)
P. Allen et al., WA21 Coll.: Phys. Lett. B103 (1981) 71
G.T. Jones et al., WA21 Coll.: Z. Phys. C44 (1989) 379
M.A. Parker et al.: Nucl. Phys. B232 (1984) 1
D. Allasia et al., WA25 Coll.: Z. Phys. C28 (1985) 321
H. Abramowicz et al., CDHS Coll.: Z. Phys. C25 (1984) 29
J.V. Allaby et al., CHARM Coll.: Phys. Lett. B197 (1987) 281
A.E. Asratyan et al.: Soc. J. Nucl. Phys. 41 (1985) 763
J.B. Cole et al.: Phys. Rev. D37 (1988) 1105
M. Arneodo et al., EMC Coll.: Nucl. Phys. B321 (1989) 541
J. Ashman et al., EMC Coll.: Z. Phys. C52 (1991) 361
A.C. Benvenuti et al., BCDMS Coll.: Phys. Lett. B237 (1990) 599
P. Amaudruz et al., NMC Coll.: Nucl. Phys. B371 (1992) 3
C. Brand et al.: Nucl. Instrum. Methods 136 (1976) 485; R. Beuselinck et al. Nucl. Instrum. Methods 154 (1978) 445
H. Foeth: Nucl. Instrum. Methods 176 (1980) 203; M.L. Retter, S.J. Towers: Nuclear Physics Laboratory, Oxford, Ref. 25/85 (1985); H. Foeth et al.: Nucl. Instrum. Methods A253 (1987) 245
G.R. Farrar, D.R. Jackson: Phys. Rev. Lett. 35 (1975) 1416
F.E. Close, R.G. Roberts: Z. Phys. C8 (1981) 57
R.D. Field, R.P. Feynman: Phys. Rev. D15 (1977) 2590
R. Carlitz: Phys. Lett. B58 (1975) 345
F.E. Close: Phys. Lett. B212 (1988) 227
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Jones, G.T., Jones, R.W.L., Kennedy, B.W. et al. Determination of the ratior v =d v u v of the valence quark distributions in the proton from neutrino and antineutrino reactions on hydrogen and deuterium. Z. Phys. C - Particles and Fields 62, 601–607 (1994). https://doi.org/10.1007/BF01574162
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF01574162