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    CFNS Ad-Hoc Meeting: Radiative Corrections

    9–10 Jul 2020
    US/Eastern timezone

    Contribution List

    16 out of 16 displayed
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    1. 1. The current state of affairs
      Dr Jan Friedrich (TUM)
      09/07/2020, 09:00
    2. 2. Radiative corrections for precision e-p scattering
      Jaseer Ahmed, Peter Blunden (University of Manitoba)
      09/07/2020, 09:40
    3. 3. Radiative corrections and two-photon exchange for MUSE and JLAB
      Prof. Andrei Afanasev (GWU)
      09/07/2020, 10:35
    4. 4. Radiative corrections for the MUSE experiment
      Prof. Steffen Strauch (USC)
      09/07/2020, 11:15

      The MUon proton Scattering Experiment (MUSE) at the Paul Scherrer Institute will measure the elastic electron-proton and muon-proton-scattering cross-sections with beam momenta between 115 MeV/c and 210 MeV/c and scattering angles between 20 degrees and 100 degrees. As the momenta of the final-state leptons remain largely unmeasured, the determination of radiative corrections faces...

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    5. 5. Modeling Radiative Processes for the OLYMPUS Experiment
      Prof. Axel Schmidt (GWU)
      09/07/2020, 13:00

      The OLYMPUS Experiment at DESY measured the elastic positron-proton to electron-proton cross section ratio, to quantify the effects of hard two-photon exchange (TPE). Hard TPE creates an asymmetry between the electron and positron cross sections, but so do several other radiative processes. One of the challenges faced by OLYMPUS was to properly account for these residual effects in order to...

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    6. 6. Radiative correction studies for the PRad and planned PRad-II, DRad and SoLID experiments at Jefferson Laboratory
      Vladimir Khachatryan (Duke)
      09/07/2020, 13:40

      The interpretation of experimental data in charge radius measurements of proton in elastic e+p scattering requires correct calculations or elaborate estimations of radiative corrections. This is also the case for deuteron charge radius measurements in elastic e+d scattering as well as for semi-inclusive DIS scattering measurements of polarized and unpolarized particles. In this talk we will...

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    7. 7. Radiative corrections for MUSE
      Prof. Fred Myhrer (USC)
      09/07/2020, 14:20

      The radiative corrections for the low-energy lepton-proton elastic scattering will be presented.
      Since at low scattering energies utilized in MUSE, the lepton masses are kept in evaluations of the radiative contributions. We use the low-energy heavy baryon chiral perturbation theory and evaluate contributions at leading and next-to-leading order.

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    8. 8. Radiative Corrections in SIDIS: Current Status and Perspectives
      Prof. Igor Akushevich (Duke)
      09/07/2020, 15:15

      I will i) review approaches for RC calculation in deep inelastic scattering (DIS) and semi-inclusive DIS (SIDIS), ii) present the explicit exact analytical expressions for the lowest order radiative corrections to the SIDIS of the polarized particles, iii) briefly discuss the approach for covariant extraction and cancellation of the infrared divergence from the real and virtual photon emission...

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    9. 9. Fifth Force in Atomic Systems: Where to Look
      Prof. Ulrich Jentschura (Missouri S&T University)
      09/07/2020, 15:55

      Recently, the so-called X17 boson may have been seen in nuclear physics experiments at the ATOMKI institute in Debrecen, Hungary. The mass range of the particle, which is about 17 MeV, hence its name, makes the particle hard to detect in low-energy atomic physics experiments, despite the unprecedented accuracy of modern experiments. We find the effective Hamiltonians generated by X17 exchange,...

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    10. 10. Summary EIC MC activities
      Markus Diefenthaler (Jefferson Lab)
      10/07/2020, 09:00

      The EIUCG Software Working Group (SWG) is working on physics and detector simulations that enable a quantitative assessment of the measurement capabilities of the EIC detector(s) and their physics impact for the Yellow Report Initiative. The common simulation tools and workflow environment being set up by the working group allows the EICUG to pursue the Yellow Report studies in a manner that...

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    11. 11. Second order Radiative corrections for ep Scattering
      Prof. Hubert Spiesberger (JGU Mainz)
      10/07/2020, 09:40

      High-precision measurements of lepton nucleon scattering will require knowledge of higher-order radiative corrections.
      I’ll describe a calculation of QED leptonic corrections including contributions from 2-loop virtual corrections, 2-photon
      emission and 1-loop corrections for 1-photon radiation. A Monte Carlo simulation code was developed for elastic ep
      scattering.

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    12. 12. Higher-order calculations of RC for ep and Moller scattering
      Dr Stan Srednyak (Duke)
      10/07/2020, 10:35

      Proton radius puzzle is the discrepancy between inferred proton radius in ep scattering and in muonium spectral measurements. In a remarkable recent experiment, PRad, it was demonstrated that earlier results for $r_p$ in ep scattering must be reconsidered. The systematic error analysis for this experiment has shown that the dominant source of systematic error comes from radiative corrections....

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    13. 13. New approach to RC
      Jianwei Qiu (Jefferson Lab)
      10/07/2020, 11:15
    14. 14. Radiative corrections in MC event generators in HEP
      Stefan Hoeche (Fermilab)
      10/07/2020, 13:00
    15. 15. Radiative Corrections in MC for EIC
      Andrea Bressan
      10/07/2020, 13:40
    16. 16. Opportunities at EIC with Both Lepton Signs
      Richard Milner (MIT)
      10/07/2020, 14:35

      EIC is motivated by the possibility to scatter electrons from hadrons. i.e. to utilize the well-determined QED interaction to understand how the quarks and gluons of QCD form the bound systems which account for the visible mass in the universe. The perturbative QED expansion is significantly affected both by radiative processes as well as higher-order terms which are believed to be...

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