Measurement of the neutron and the proton $F_2$ structure function ratio
- Allasia, D.
- Amaudruz, P.
- Broggini, C.
- Br?ckner, W.
- Br?ll, A.
- Ciborowski, J.
- Crittenden, R.
- van Dantzig, R.
- D?bbeling, H.
- Domingo, J.
- Drinkard, J.
- Dzierba, A.
- Arneodo, M.
- Engelien, H.
- Ferrero, M. I.
- Fluri, L.
- Grafstrom, P.
- Greiner, D.
- Gretillat, P.
- G?nther, W.
- Hagberg, E.
- von Harrach, D.
- van der Heijden, M.
- Arvidson, A.
- Heusch, C.
- Ingram, Q.
- Jacholkowska, A.
- Janson, K.
- de Jong, M.
- Kabu?, E. M.
- Kaiser, R.
- Ketel, T.
- Klein, F.
- Korzen, B.
- Badelek, B.
- Kr?ner, U.
- Kullander, S.
- Landgraf, U.
- Lettenstr?m, F.
- Lindqvist, T.
- Mallot, G. K.
- Mariotti, C.
- van Middelkoop, G.
- Mizuno, Y.
- Nassalski, J.
- Baum, G.
- Nowotny, D.
- Pavel, N.
- Peschel, H.
- Peroni, C.
- Povh, B.
- Rieger, R.
- Rith, K.
- R?hrich, K.
- Rondio, E.
- Ropelewski, L.
- Beaufays, J.
- Sandacz, A.
- Scholz, C.
- Schumacher, R.
- Sennhauser, U.
- Sever, F.
- Shibata, T. A.
- Siebler, M.
- Simon, A.
- Staiano, A.
- Taylor, G.
- Bird, I. G.
- Treichel, M.
- Vuilleumier, J. L.
- Walcher, T.
- Welch, K.
- Windmolders, R.
- New Muon Collaboration
- Botje, M.
- Burger, W. J.
DOIAbstract
The ratio of the structure function $F^2_n/F^2_p$ (x) has been measured in deep inelastic scattering of 274 GeV muons on hydrogen and deuterium targets exposed simultaneously to the beam. The results were obtained from 0.3 (0.6) million events from hydrogen (deuterium) in the range 0.004 $<$x$<$ 0.8 and 1 $<$Q$_2$$<$ 190 GeV$^2$. At x < 0.25 both the statistical and the systematic error is below 2%. Implications for parton distributions and for the σw/σz production cross section ratio in pp collisions are discussed. When compared to other results obtained at lower energies, the data indicate a Q2 dependence of the ratio
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