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Measurements of the ratio of the proton elastic form factors ($\mu_pG_E/G_M$) using Rosenbluth separation and those using polarization-based techniques show a strong discrepancy, which increases as a function of $Q^2$. The contribution of…

Nuclear Experiment · Physics 2017-12-07 Brian S. Henderson

Background: Neutrino-nucleus quasi-elastic scattering is crucial to interpret the neutrino oscillation results in long baseline neutrino experiments. There are rather large uncertainties in the cross section, due to insufficient knowledge…

Nuclear Theory · Physics 2012-09-13 G. Shen , L. E. Marcucci , J. Carlson , S. Gandolfi , R. Schiavilla

In this note we consider effects of a Two-Photon Exchange (TPE) in inclusive DIS and semi-inclusive DIS (SIDIS). In particular, transverse single spin asymmetries are generated in inclusive DIS if more than one photon is exchanged between…

High Energy Physics - Phenomenology · Physics 2009-08-24 M. Schlegel , A. Metz

We discuss diphoton semi(exclusive) production in ultraperipheral $PbPb$ collisions at energy of $\sqrt{s_{NN}}=$ 5.5 TeV (LHC). The nuclear calculations are based on equivalent photon approximation in the impact parameter space. The cross…

High Energy Physics - Phenomenology · Physics 2016-10-28 Mariola Klusek-Gawenda , Antoni Szczurek

We evaluate the two-photon exchange correction to the elastic electron-proton scattering cross section within a dispersive framework. Besides the elastic contribution, we account for all $\pi N$ intermediate state contributions using the…

High Energy Physics - Phenomenology · Physics 2017-11-15 O. Tomalak , B. Pasquini , M. Vanderhaeghen

Final-state interactions in (e,e'n) knockout reactions in the quasi-free region are studied by considering the multistep direct scattering of the ejectile nucleon. Primary and multiple particle emission are included within the same model…

Nuclear Theory · Physics 2009-10-30 P. Demetriou , S. Boffi , C. Giusti , F. D. Pacati

The spin-dependent cross sections for semi-inclusive lepton-nucleon scattering are derived in the framework of collinear factorization, including the effects of masses of the target and produced hadron at finite momentum transfer squared…

High Energy Physics - Phenomenology · Physics 2015-10-28 J. V. Guerrero , J. J. Ethier , A. Accardi , S. W. Casper , W. Melnitchouk

We construct a nonlocal gauge invariant Lagrangian to model the electromagnetic interaction of proton. The Lagrangian includes all allowed operators with dimension up to five. We compute the two photon exchange contribution to elastic…

High Energy Physics - Phenomenology · Physics 2008-11-26 Pankaj Jain , Satish D. Joglekar , Subhadip Mitra

We present a discussion of models of nuclear effects used to describe an inclusive electron-nucleus scattering in the quasielastic (QE) peak region, aiming to compare them and draw conclusion of their reliability when applied in…

Nuclear Theory · Physics 2017-11-01 Joanna Ewa Sobczyk

The influence of relativistic contributions to deuteron electrodisintegration is systematically studied in various kinematic regions of energy and momentum transfer. As theoretical framework the equation-of-motion and the unitarily…

Nuclear Theory · Physics 2008-11-26 F. Ritz , H. Goeller , T. Wilbois , H. Arenhoevel

Understanding nuclear effects is essential for improving the sensitivity of neutrino oscillation measurements. Validating nuclear models solely through neutrino scattering data is challenging due to limited statistics and the broad energy…

High Energy Physics - Phenomenology · Physics 2025-02-25 Seisho Abe

The splitting between the charge-longitudinal and spin-transverse responses is explained in a model whose inputs are the effective interactions in the particle-hole channels in the frame of the first order boson loop expansion. It is shown…

Nuclear Theory · Physics 2009-10-30 R. Cenni , F. Conte , P. Saracco

The remarkable observations in the pion induced and charge exchange reactions on a nucleus are the significant shift and broadening of the $\Delta (1232)$-peak relative to free pion nucleon scattering. For the forward going massless…

Nuclear Theory · Physics 2018-01-09 Swapan Das

We have performed a many body calculation of the inclusive (e,e') cross section which runs over the three traditional regions at intermediate energies: the quasielastic peak, the dip region and the delta region. The longitudinal and…

Nuclear Theory · Physics 2009-10-30 A. Gil , J. Nieves , E. Oset

The comparison of positron-proton and electron-proton elastic scattering cross sections is a sensitive test for the presence of two-photon exchange contributions. Thirty years ago, positron data were considered adequate to set tight limits…

Nuclear Experiment · Physics 2009-11-10 J. Arrington

We study the phase-space dependence of 2p-2h excitations in neutrino scattering using the relativistic Fermi gas model. We follow a similar approach to other authors, but focusing in the phase-space properties, comparing with the…

Nuclear Theory · Physics 2015-01-29 I. Ruiz Simo , C. Albertus , J. E. Amaro , M. B. Barbaro , J. A. Caballero , T. W. Donnelly

We have carried out a calculation of the inclusive electron scattering cross section off oxygen in the kinematical region corresponding to beam energies between 700 and 1200 MeV, where quasielastic scattering and single pion production are…

High Energy Physics - Phenomenology · Physics 2009-04-22 Hiroki Nakamura , Tadaaki Nasu , Makoto Sakuda , Omar Benhar

The details of the calculation of the two-boson exchange effects in the parity-violating elastic $ep$ scattering within a simple hadronic model, including both the nucleon and $\Delta(1232)$-resonance intermediate states, are presented. We…

Nuclear Theory · Physics 2010-04-14 Hai Qing Zhou , Chung Wen Kao , Shin Nan Yang , Keitaro Nagata

The first CLAS12 experiments will provide high-precision data on inclusive electron scattering observables at a photon virtuality $Q^2$ ranging from 0.05 GeV$^2$ to 12 GeV$^2$ and center-of-mass energies $W$ up to 4 GeV. In view of this…

We relate the forward two-photon exchange (TPE) amplitudes to integrals of the inclusive lepton-proton scattering cross sections. These relations yield an alternative way for the evaluation of the TPE correction to hyperfine-splitting (HFS)…

High Energy Physics - Phenomenology · Physics 2017-09-22 Oleksandr Tomalak