Few-Body Syst (2012) 52:271–277 DOI 10.1007/s00601-011-0297-7 K. Kovaˇ rík · I. Schienbein · F. I. Olness · J. Y. Yu · C. Keppel · J. G. Morfín · J. F. Owens · T. Stavreva Nuclear Corrections in ν A DIS and Their Compatibility with Global NPDF Analyses Received: 19 September 2011 / Accepted: 8 December 2011 / Published online: 13 January 2012 © Springer-Verlag 2012 Abstract We perform a global χ 2 -analysis of nuclear parton distribution functions using data from charged current neutrino–nucleus (ν A) deep inelastic scattering (DIS), charged-lepton–nucleus (ℓ ± A) DIS, and the Drell–Yan (DY) process. We show that the nuclear corrections in ν A DIS are not compatible with the predic- tions derived from ℓ ± A DIS and DY data. We quantify this result using a hypothesis-testing criterion based on the χ 2 distribution which we apply to the total χ 2 as well as to the χ 2 of the individual data sets. We find that it is not possible to accommodate the data from ν A and ℓ ± A DIS by an acceptable combined fit. This implies that either the twist-2 parton distribution functions in nuclei are not universal, or that higher-twist terms play a more important role in the nuclear environment and have to be taken into account. 1 PDFs and Nuclear Corrections High statistics neutrino deep-inelastic scattering (DIS) experiments have generated significant interest in the literature as they provide crucial information for global fits of parton distribution functions (PDFs). The neu- trino DIS data provide the most stringent constraints on the strange quark distribution in the proton, and allow for flavor decomposition of the PDFs which is essential for precise predictions of the benchmark gauge boson Presented by Fredrick Olness at LIGHTCONE 2011, 23–27 May, 2011, Dallas. K. Kovaˇrík · I. Schienbein · T. Stavreva LPSC, Université Joseph Fourier/CNRS-IN2P3/INPG, UMR5821, 38026 Grenoble, France K. Kovaˇrík Karlsruhe Institute of Technology, 76128 Karlsruhe, Germany F. I. Olness (B ) · J. Y. Yu Southern Methodist University, Dallas, TX 75275, USA E-mail: olness@smu.edu C. Keppel Thomas Jefferson National Accelerator Facility, Newport News, VA 23602, USA C. Keppel Hampton University, Hampton, VA 23668, USA J. G. Morfín Fermilab, Batavia, IL 60510, USA J. F. Owens Florida State University, Tallahassee, FL 32306-4350, USA