Lucas Ehinger

Lucas Ehinger

Experimental Nuclear Physics PhD Student at MIT

Theoretical Investigation of the u-d anti-quark Asymmetry of the Proton

We study the flavor asymmetry of the proton sea using a meson cloud model. In this model, the proton is described as a bare proton plus virtual meson-baryon states. We calculate the light-cone momentum distributions of pions in these states using chiral Lagrangians, and fit the parameters of the model to experimental data on the dbar-ubar asymmetry. Notably, experimental results from Fermi-lab's Seaquest experiment show good agreement with our predictions (which are not fit the the Seaquest data and were made before the data was released).

Relevant publications and Talks

Publications

  • Pions in Proton Structure and Everywhere Else
    Mary Alberg, ​Lucas Ehinger, Gerald A. Miller
    Physical Review D (2022) | arXiv

    • Talks

  • An investigation of the u-bar d-bar asymmetry in the proton sea through an updated Pion Cloud Model
    APS Division of Nuclear Physics Meeting (2021), Virtual
  • An investigation of the u-bar d-bar asymmetry in the proton sea through a combined Statistical and Meson Cloud Model
    Murdock College Science Research Conference (2020), Virtual
  • An investigation of the u-bar d-bar asymmetry in the proton sea through a combined Statistical and Meson Cloud Model
    APS Division of Nuclear Physics Meeting (2020), Virtual