[en] We discuss the nuclear EMC effect with particular emphasis on recent data for light nuclei including 2H, 3He, 4He, 9Be, 12C and 14N. In order to verify the consistency of available data, we calculate the χ² deviation between different data sets. We find a good agreement between the results from the NMC, SLAC E139, and HERMES experiments. However, our analysis indicates an overall normalization offset of about 2% in the data from the recent JLab E03-103 experiment with respect to previous data for nuclei heavier than 3He. We also discuss the extraction of the neutron/proton structure function ratio F2n/F2p from the nuclear ratios 3He/2H and 2H/1H. Our analysis shows that the E03-103 data on 3He/2H require a renormalization of about 3% in order to be consistent with the F2n/F2p ratio obtained from the NMC experiment. After such a renormalization, the 3He data from the E03-103 data and HERMES experiments are in a good agreement. Finally, we present a detailed comparison between data and model calculations, which include a description of the nuclear binding, Fermi motion and off-shell corrections to the structure functions of bound proton and neutron, as well as the nuclear pion and shadowing corrections. Overall, a good agreement with the available data for all nuclei is obtained.

[en] There are a number of exciting physics opportunities at a future electron-ion collider facility. One possible design for such a facility is eRHIC, where the current RHIC facility located at Brookhaven National Lab would be transformed into an electron-ion collider. It is imperative for a seamless integration of auxiliary detector systems into the interaction region design to have a machine that meets the needs for the planned physics analyses, as well as take into account the space constraints due to the tunnel geometry and the necessary beam line elements. In this talk, we describe the current ideas for integrating a luminosity detector, electron polarimeter, roman pots, and a low Q"2-tagger into the interaction region for eRHIC. (author)

[en] How to include spacetime translations in fibre bundle gauge theories has been a subject of controversy, because spacetime symmetries are not internal symmetries of the bundle structure group. The standard method for including affine symmetry in differential geometry is to define a Cartan connection on an affine bundle over spacetime. This is equivalent to (1) defining an affine connection on the affine bundle, (2) defining a zero section on the associated affine vector bundle and (3) using the affine connection and the zero section to define an 'associated solder form', whose lift to a tensorial form on the frame bundle becomes the solder form. The zero section reduces the affine bundle to a linear bundle and splits the affine connection into translational and homogeneous parts; however, it violates translational equivariance/gauge symmetry. This is the natural geometric framework for Einstein-Cartan theory as an affine theory of gravitation. The last section discusses some alternative approaches that claim to preserve translational gauge symmetry

[en] We present new results on the neutrino-nucleon/nucleus cross-sections using the high resolution NOMAD data. The results include cross-section measurements of (a) Inclusive ν_μ-N charge current, (b) ν_μ quasi elastic, and (c) Coherent ν_μ-Carbon neutral pion. Each measurement is the most precise reported to date. (author)

[en] The NOMAD experiment collected valuable neutrino data samples, matching both the large statistics of massive calorimeters and the reconstruction quality of bubble chambers. This paper describes the recent measurements of neutrino cross-sections on carbon target. The approach followed for cross-section modeling is also explained

[en] Interest in the production of direct photons at low momentum in heavy ion collisions has increased recently with the rather puzzling recent PHENIX results on the observation of a large excess in the yield of direct photons in Au+Au collisions compared to the Ncou scaled p+p yield and the observation of a large direct photon v_2 at p_T below 3GeV/c. The two measurements are difficult to reconcile within the current understanding of the fireball evolution and the assumption that low momentum direct photons are dominantly emitted early in the collision. This has sparked much theoretical interest, with new calculations refining old works as well as calculations of newly proposed production mechanisms. Experimental constraints on newly proposed production mechanisms are crucial in understanding the evolution of the fireball. One would also desire experimental evidence whether the direct photons below p_T of 3GeV/c are dominantly emitted early or late in the collision. In this proceedings, we show new PHENIX measurements of the detailed centrality dependence of direct photon production in the range of 0.4 < p_T < 5GeV/c in Au+Au collisions at √S_N_N = 200GeV based on the high statistics of the combined 2007 and 2010 datasets. Photons are cleanly identified through their external conversion in the backplane of the Hadron Blind Detector to dielectron pairs. We observe the shape of the excess direct photon invariant yield in the range of 0.6 < p_T < 2GeV/c is well described by an exponential fit with an inverse slope of 240MeV/c"2 consistent with previous measurements. Additionally, the shape is seen to be the same for all centralities within uncertainties and the integrated yield follows a power law as a function of N_p_a_r_t. The new results will offer powerful constraints to current calculations which must predict the same centrality dependence.

[en] The results of recent phenomenological studies of unpolarized nuclear deep inelascis scattering are discussed and applied to calculate neutrino CC structure functions and cross sections for a number of nuclei

[en] We discuss calculation of nuclear corrections to the structure functions for the deep-inelastic scattering of muon and (anti)neutrino. Our approach includes a QCD description of the nucleon structure functions as well as the treatment of Fermi motion and nuclear binding, off-shell correction to bound nucleon structure functions, nuclear pion excess and nuclear shadowing. We emphasize the dependence of nuclear effects on the type and C parity of (anti)neutrino structure functions. We also examine the interplay between different nuclear effects in the Adler and the Gross-Llewellyn-Smith sum rules for nuclei

[en] We present our new measurement of charm dimuon production in neutrino-iron interactions based upon the full statistics collected by the NOMAD experiment. After background subtraction we observe 15,340 charm dimuon events, providing the largest sample currently available. The analysis exploits the large inclusive charged current sample (about 9 million events after all analysis cuts) to constrain the total systematic uncertainty to ∼2%. The extraction of strange sea and charm production parameters is also discussed

[en] We present the results of a phenomenological study of unpolarized nuclear structure functions for a wide kinematical region of x and Q². As a basis of our phenomenology we develop a model which takes into account a number of different nuclear effects including nuclear shadowing, Fermi motion and binding, nuclear pion excess and off-shell correction to bound nucleon structure functions. Within this approach we perform a statistical analysis of available data on the ratio of the nuclear structure functions F₂ for different nuclei in the range from the deuteron to the lead. We express the off-shell effect and the effective scattering amplitude describing nuclear shadowing in terms of few parameters which are common to all nuclei and have a clear physical interpretation. The parameters are then extracted from statistical analysis of data. As a result, we obtain an excellent overall agreement between our calculations and data in the entire kinematical region of x and Q². We discuss a number of applications of our model which include the calculation of the deuteron structure functions, nuclear valence and sea quark distributions and nuclear structure functions for neutrino charged-current scattering