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Nuclear corrections in neutrino-nucleus DIS and their compatibility with global NPDF analyses

We perform a global chi^2-analysis of nuclear parton distribution functions using data from charged current neutrino-nucleus deep-inelastic scattering (DIS), charged-lepton-nucleus DIS, and the Drell-Yan (DY) process. We show that the nuclear corrections in nu-A DIS are not compatible with the predictions derived from l^+A DIS and DY data. We quantify this result using a hypothesis-testing criterion based on the chi^2 distribution which we apply to the total chi^2 as well as to the chi^2 of the individual data sets. We find that it is not possible to accommodate the data from nu-A and l^+A DIS by an acceptable combined fit. Our result has strong implications for the extraction of both nuclear and proton parton distribution functions using combined neutrino and charged-lepton data sets.

preprint2011arXivOpen access
K. KovarikI. SchienbeinF. OlnessJ. Y. YuC. KeppelJ. G. MorfinJ. F. OwensT. Stavreva
hep-ph
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Open access8 authors1 topic
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K. KovarikI. SchienbeinF. OlnessJ. Y. YuC. KeppelJ. G. MorfinJ. F. OwensT. Stavreva

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