Nuclear Parton Distribution Functions
Zusammenfassung der Projektergebnisse
• We have performed for the first time a thorough analysis of neutrino–iron cross section data from the NuTeV collaboration in the context of a χ2 -analysis of nuclear PDFs. Our results indicate that the nuclear effects in charged current neutrino scattering might be different from the ones seen in neutral current scattering of charged leptons off nuclei and lepton pair production in proton–nucleus scattering. • We have extended the CTEQ-FORTRAN code to handle nuclear targets and have modeled a simple A-dependence of the parton distribution functions at the input scale. An analysis of charged-lepton–nucleus DIS data and Drell–Yan data shows that our framework reproduces the well-known nuclear effects which are different from the results of our study of neutrino–iron data. • In order to draw final conclusions it will be necessary to perform a combined analysis of νA, ± A, and Drell–Yan data which is in progress. • A simultaneous analysis of proton and nuclear PDFs offers the possibilty to compute nuclear correction factors needed in the proton analysis in a dynamical way using the nuclear PDFs. • In addition, we have reviewed target mass corrections which are relevant for the analysis of structure functions in deep inelastic scattering at large values of Bjorken-x and low Q2. This review is considered very useful by the community. • We have contributed to the physics case of a future high-energy, high-statistics neutrino experiment. Such an experiment offers a rich physics program ranging from electroweak precision observables, over direct and indirect searches of new physics to precision QCD, allowing for detailed studies of nuclear effects for various nuclear targets. • Our work provides the foundation for including the neutrino–nucleus data back into the global fit of proton PDFs which have been removed in the most recent analysis of CTEQ6.5 and 6.6 PDFs. The neutrino DIS data are a key ingredient for the determination of the strange quark PDF which is in turn very important for precise predictions of the W and Z production cross sections at the LHC.
Projektbezogene Publikationen (Auswahl)
- Single pion electro- and neutrinoproduction on heavy targets
E. A. Paschos, I. Schienbein, and J.-Y. Yu
- A Review of Target Mass Corrections. J. Phys. G35 (2008) 053101
I. Schienbein, V.A. Radescu, G.P Zeller, M.E. Christy, C.E. Keppel, K.S. McFarland, W. Melnitchouk, F.I. Olness, M.H. Reno, F. Steffens, J.-Y. Yu
- Nuclear Parton Distribution Functions. Proceedings of the Ringberg Workshop on New Trends in HERA Physics 2008, Ringberg Castle, Tegernsee, Germany, 5–10 Oct 2008, Nucl. Phys. Proc. Suppl. 191, 25 (2009)
I. Schienbein, J.-Y. Yu, C. Keppel, J. Morfin, F. Olness, and J. Owens
- Nuclear PDFs from neutrino deep inelastic scattering. Phys. Rev. D77, 054013 (2008)
I. Schienbein, J.-Y. Yu, C. Keppel, J. Morfin, F. Olness, and J. Owens
- Parton distribution function uncertainties & nuclear corrections for the LHC. Proceedings of the 43rd Rencontres de Moriond on QCD and Hadron Interactions, La Thuile, Italy, 8–15 March 2008 and the 16th International Workshop on Deep Inelastic Scattering and Related Subjects (DIS 2008), London, England, 7–11 April 2008
I. Schienbein, J.-Y. Yu, C. Keppel, J. Morfin, F. Olness, and J. Owens
- Terascale Physics Opportunities at a High Statistics, High Energy Neutrino Scattering Experiment: NuSOnG. Int. J. Mod. Phys. A24, 671 (2009)
T. Adams et al.
