Engineering topics
Miller, Gerald A.
Publications and source records attributed to Miller, Gerald A..
Quark counting, Drell-Yan West, and the pion wave function
The relation between the pion's quark distribution function, πβ‘(π₯), its light-front wave function, and the elastic charge form factor, πΉβ‘(Ξ 2 ), is explored. The square of the leading-twist pion wave function at a special probe scale, π π» , is determined using models and PoincarΓ© covariance from realistic results for πβ‘(π₯). This wave function is then used to compute form factors with the result that the Drell-Yan-West and quark counting relationships are not satisfied. A new relationship between πβ‘(π₯) and πΉβ‘(Ξ 2 ) is proposed.
Examining the possibility that normal nuclear matter is quarkyonic
The possibility that nuclear matter might be quarkyonic is considered. Quarkyonic matter is high baryon density matter that is confined but can be approximately thought of as a filled Fermi sea of quarks surrounded by a shell of nucleons. Here, nuclear matter is described by the IdylliQ sigma model for quarkyonic matter, generalizing the noninteracting IdylliQ model [Y. Fujimoto et al., Phys. Rev. Lett. 132, 112701 (2024)] to include interactions with a Ο meson and a pion. When such interactions are included, we find that isospin-symmetric nuclear matter binds with acceptable values of the compressibility and other parameters for nuclear matter at saturation. The energy per nucleon and sound velocity of such matter is computed, and the isospin dependence is determined. Nuclear matter is formed at a density close to but slightly above the density at which quarkyonic matter forms. Quarkyonic matter predicts a strong depletion of nucleons in normal nuclear matter at low momentum. Finally, such a depletion for nucleon momenta k β² 120 MeV is shown to be consistent with electron scattering data.