Oleksandr Tomalak

Apr 25, 2024 | link.aps.org | Oleksandr Tomalak |Los Alamos |Ivan Vitev

Interactions of charged leptons with nuclei and the naive tree-level kinematics of these processes are affected by radiation of photons induced by the QED nuclear medium. We evaluate cross section modifications at leading orders of the number of correlated interactions inside the nucleus, known as the opacity expansion. We derive results for soft and collinear types of the bremsstrahlung at the first three orders in opacity and generalize them to higher orders.

Mar 1, 2024 | link.aps.org | Richard Hill |Oleksandr Tomalak |Los Alamos |Roberto Petti

Precision measurements of antineutrino elastic scattering on hydrogen from future neutrino experiments offer a unique opportunity to access the low-energy structure of protons and neutrons. We discuss the determination of the nucleon axial-vector form factor and radius from antineutrino interactions on hydrogen that can be collected at the future Long-Baseline Neutrino Facility and study the sources of theoretical and experimental uncertainties.

Nov 13, 2023 | link.aps.org | Oleksandr Tomalak |Los Alamos |Ivan Vitev

Proper interpretation of past, current, and future data on lepton-nucleus reactions requires a clear separation between quantum electrodynamics and strong interaction effects inside the nucleus. First studies of QED in-medium lepton dynamics have set a theoretical framework to derive electron-nucleus and (anti)neutrino-nucleus cross section corrections. We employ this approach to quantitatively compute the effects of Glauber photon-mediated multiple rescattering within the nuclear medium.

Oct 23, 2023 | link.aps.org | Oleksandr Tomalak |Los Alamos |Rajan Gupta |Tanmoy Bhattacharya

We compare recent MINERvA antineutrino-hydrogen charged-current measurements to phenomenological predictions of the axial-vector form factor based on fits to all available electron scattering and deuterium bubble-chamber data and to representative lattice-QCD (LQCD) determination by the PNDME Collaboration. While there is 1σ–2σ agreement in the cross section with MINERvA data for each bin in Q2, we identify three regions with different relevance and opportunity for LQCD predictions.

May 15, 2023 | link.aps.org | Oleksandr Tomalak |Los Alamos |Richard Hill |Kaushik Borah

Journals Physical Review Letters Physical Review X PRX Energy PRX Life PRX Quantum Reviews of Modern Physics Physical Review A Physical Review B Physical Review C Physical Review D Physical Review E Physical Review Research Physical Review Accelerators and Beams Physical Review Applied Physical Review Fluids Physical Review Materials Physical Review Physics Education Research Physical Review Physical Review (Series I) Physics Physique Fizika Physics Magazine Help/Feedback Log in Abstract...