Article
Astronomy & Astrophysics
Oleksandr Tomalak, Qing Chen, Richard J. Hill, Kevin S. McFarland, Clarence Wret
Summary: Control over quantum electrodynamics radiative corrections is crucial for accurate determination of neutrino oscillation probabilities. We provide a theoretical foundation for calculating these corrections and investigate the impact of QED corrections on neutrino scattering cross sections.
Article
Astronomy & Astrophysics
O. G. Miranda, G. Moreno-Granados, C. A. Moura
Summary: Future long-baseline experiments aim to measure neutrino oscillation properties with unprecedented precision and search for CP violation in the leptonic sector. This study focuses on the measurement of radiative corrections in neutrino-electron scattering, particularly on exclusive contributions to neutrino channels such as the neutrino charge radius. The results show promising prospects for a clear measurement of this effective quantity.
Article
Astronomy & Astrophysics
S. Zarrin, S. Dadfar
Summary: This study investigates the effects of nonlinear corrections on the neutral current electron-proton scattering, showing that these corrections are more pronounced at low x values and partially control the increasing trend of the cross sections. The results also suggest that the nonlinear behavior of quark and gluon distributions is consistent at low x values.
Article
Optics
T. Zalialiutdinov, D. Glazov, D. Solovyev
Summary: This study examines the influence of the blackbody radiation field on the g factor of light hydrogenlike ions at finite temperature for bound states. It presents numerical results for a variety of states and demonstrates that even at room temperatures, finite temperature corrections to the bound-electron g factor are close to current experimental uncertainty levels and can be observed in future measurements.
Article
Physics, Nuclear
V. S. Fadin, R. E. Gerasimov
Summary: The structure function approach and parton picture were used to calculate radiative corrections in deep inelastic electron-proton scattering, specifically in an experimental setup proposed to measure the proton radius. Explicit expressions for these corrections were obtained in the one-loop approximation, and corrections in the leading logarithmic approximation were obtained in two loops.
EUROPEAN PHYSICAL JOURNAL A
(2021)
Article
Physics, Multidisciplinary
Ayres Freitas, Qian Song
Summary: We have performed a complete calculation of the next-to-next-to-leading electroweak corrections involving closed fermion loops to e+e- -> ZH. We have used a seminumerical technique for the two-loop vertex and box diagrams, based on Feynman parameters and dispersion relations for one of the two subloops. UV divergences are treated with suitable subtraction terms. Numerical results for the unpolarized differential and integrated cross section at center-of-mass energy 240 GeV are provided. The new corrections are found to increase the predicted cross section by 0.7%.
PHYSICAL REVIEW LETTERS
(2023)
Article
Astronomy & Astrophysics
Norman H. Christ, Xu Feng, Lu-Chang Jin, Christopher T. Sachrajda, Tianle Wang
Summary: Lattice QCD calculations have achieved subpercent precision and isospin-breaking corrections, including QED effects, must be considered for accurate determination of fundamental quantities from experimental measurements. This paper presents a new theoretical framework, based on infinite-volume reconstruction (IVR), for calculating electromagnetic corrections to leptonic decay widths. The IVR method allows for nonperturbative determination of required matrix elements from lattice QCD computations with exponentially small finite-volume uncertainties. The framework also demonstrates potential for determining QED effects in semileptonic kaon decays.
Article
Physics, Particles & Fields
Tommaso Armadillo, Roberto Bonciani, Simone Devoto, Narayan Rana, Alessandro Vicini
Summary: We present the two-loop mixed strong-electroweak virtual corrections to the neutral current Drell-Yan process and provide the explicit formulae of the infrared-subtracted finite remainder as supplementary material. The final state collinear singularities are regularised by the lepton mass. The calculation of all relevant Feynman integrals, including those with up to two internal massive lines, is carried out using analytical and semi-analytical techniques in the case of complex-valued masses.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Astronomy & Astrophysics
Ahmed Ismail, Roshan Mammen Abraham, Felix Kling
Summary: FASER nu is expected to record the most energetic laboratory neutrinos ever studied, with the potential to observe neutrino neutral current scattering events. Researchers have demonstrated the use of deep neural networks to measure the neutral current scattering cross section, providing a complementary probe of neutrino nonstandard interactions to other tests such as oscillations and coherent neutrino-nucleus scattering.
Article
Astronomy & Astrophysics
A. Jamali Hafshejani, A. Mirjalili
Summary: The proposed mass-dependent momentum subtraction (MOM) scheme is used to renormalize UV divergence of unpolarized PDFs at one-loop order, based on a once subtracted dispersion relation without the need for a regulator. The mass-dependent characteristic of the scheme leads to mass-dependent splitting functions for the DGLAP evolution equations, while automatically imposing the decoupling theorem. The required symmetries are also automatically respected by this approach.
Article
Astronomy & Astrophysics
Victor P. Goncalves, Diego R. Gratieri, Alex S. C. Quadros
Summary: This paper investigates the dipole formalism in Z0-proton interactions at high energies, estimates the contribution associated with Pomeron exchange, and presents results under different models.
Article
Physics, Multidisciplinary
Roberto Bonciani, Luca Buonocore, Massimiliano Grazzini, Stefan Kallweit, Narayan Rana, Francesco Tramontano, Alessandro Vicini
Summary: This study presents the first complete computation of the mixed QCD-electroweak (EW) corrections to the neutral-current Drell-Yan process. The two-loop virtual contribution is computed using semianalytical techniques, and the cancellation of singularities is achieved through an appropriate qT subtraction formalism. The results show that the mixed QCD-EW corrections are negative and increase in magnitude at high lepton pT values, with a maximum of about -15% compared to the next-to-leading-order QCD result at pT 1/4 500 GeV. Up to dilepton invariant masses of 1 TeV, the computed corrections amount to about -1.5% compared to the next-to-leading-order QCD result.
PHYSICAL REVIEW LETTERS
(2022)
Article
Astronomy & Astrophysics
Ansgar Denner, Jean-Nicolas Lang, Mathieu Pellen
Summary: This article presents the computation of next-to-leading-order (NLO) QCD corrections for a specific physics process at the LHC, marking the first public release of a full NLO computation for a 2 -> 8 process with 6 external strongly interacting partons. By comparing results with and without a double-pole approximation for the top quarks, it is found that the difference between the full calculation and the approximation is generally below 5%, but can reach up to 10% in certain phase space regions.
Article
Astronomy & Astrophysics
J. Gonzalez-Rosa, G. D. Megias, J. A. Caballero, M. B. Barbaro
Summary: This study extends the SuSAv2 model, which is used for charged-current neutrino-nucleus cross sections in the quasielastic region, to the full inelastic regime. The model combines phenomenological structure functions with a nuclear scaling function to describe resonance production and deep inelastic reactions in the neutrino sector. Two different descriptions of the Delta resonance region are compared and the model results are tested against experimental data on several nuclei and applied to study charged current inclusive neutrino cross-sections.
Article
Astronomy & Astrophysics
A. P. Furmanski, C. Hilgenberg
Summary: Modern neutrino detectors, such as large liquid argon time projection chambers at SBN and DUNE, provide valuable information about GeV-scale interactions. A novel method for estimating neutrino energy in neutral current interactions has been proposed, with potential implications for observing spectral distortions due to sterile neutrino-induced oscillations. Using this method, a statistical analysis of the sensitivity to sterile neutrinos in the neutral current channel at SBN under a 3 + 1 model was performed.
