Prof. Gerald A. Miller

Department of Physics
University of Washington
Seattle, Washington 98195-1560

Recipient of the 2022 DNP Mentoring Award

Summary of main research accomplishments (numbers refer to publication list)

My citation record can be found by googling "Gerald A. Miller google scholar University of Washington 16,239 citations, h=66, April 23, 2021

My citation record can also be found at 12898 citations, h=591 April 23, 2021

  • Hep iNSpire
  • Provided the formal and computational tools necessary to analyze pion-nucleus reactions [3,6,13,14], and co-wrote the program used to analyze virtually all of LAMPF pion-nucleus inelastic scattering data. I clarified clarified the role of nucleon-nucleon correlations in pion-nucleus double charge exchange reactions, and introduced what became known as the Miller-Spencer correlation function used in calculations of parity-violating nuclear matrix elements[13].

    We originated and applied the cloudy bag model of hadrons [39,42,47,71] a model which elucidated the role of the pion cloud in hadronic and static properties including; the neutron electric form factor, the true nature of the Delta resonance, and the M1 radiative decays of mesons.

    We unveiled and computed the charge symmetry breaking part of the neutron-proton force that was subsequently observed in experiments at TRIUMF and IUCF[24,27,36,59,77,87,103,201,217,218] We introduced the quark-based definition (up-down quark mass difference) of charge symmetry[103]. I participated in the first experimental observation of the dd to alpha pi reaction[201]. The latest work on charge symmetry breaking in pion production was highlighted in Science News, Nature, CERN Courier and Physics World . It was also rated the #49 top science story in 2003 by Discover magazine.

    I showed that the nuclear Drell Yan process could be used to probe the nuclear antiquark distribution[66,74]. A popular account of how this helped Dr. J. Moss to win a Bonner prize was given by him in LANL publication meant for a popular audience.

    We proved [184,189] using four-momentum conservation that the EMC effect could not be explained by nuclear binding and Fermi motion effects. We showed[204] how the chiral soliton model leads to nuclear saturation, explains the EMC effect and Drell-Yan data and predicts modifications of the nucleon electromagnetic form factor[209]. Later work [269] on the EMC effect showed that the necessary medium modifications of nucleon structure could occur from mean field effects or from two-nucleons that make close encounters in a short-ranged correlated pair. This work led to a cover story in the Cern Courier [271].

    Our 1989 prediction[100] of the parity violating proton-proton total cross section verified in an 2001 experiment at TRIUMF.

    I derived the connection between the strong coupling limit of QCD and nuclear physics[96]

    We established the tools required to accurately compute the effects of color transparency[113,126,142]. Our prediction [131] of the A-dependence of di-jet production in coherent pion-nucleus reactions made in 1993 was confirmed by experiments in 1999, thereby providing the first direct evidence for the existence of the color transparency phenomenon. More recently our predictions of color transparency in pion [220,230] and rho meson production [232] in nuclear reactions were confirmed by JLab experiments.

    Applied chiral perturbation theory to explain the threshold production of neutral pions in proton-proton collisions [150,153].

    Developed light front field theory for applications to nuclear physics[155,157,165,166]. Recovery of rotational invariance [162]

    I used light front techniques to predict[151] a rapid decrease of the elastic electric form factor that was observed five years later at Jlab, and provided a qualitative explanation [188]. I provided a model light-front wave function with a pion cloud that reproduced all of the then extant electromagnetic form factors [193], and introduced spin-dependent density operators to exhibit the non-spherical shape of the proton[200]. This work received a lot of attention in the popular press including the NY Times, May 6,2003, USA Today 9, 22, 2002, UWnews, Science Blog, Science a GoGo, Azono, The Hindu, RedNova, Brightsurf, Science Daily, transfer, Bible and Science, and Tregouet. The work was published in Juglio, 2013 in Focus, the Italian science museum. These densities are measurable as a Transverse Momentum Distribution [231], and later became known as ``pretzelocity" because of a pretzel-like shape shown in [200].

    I showed that transverse charge densities provide the only model-independent way to extract information about spatial densities from measurements of electromagnetic form factors, and showed that the charge density at the center of the neutron is negative [228], and that the magnetization density of the proton extends further than its charge density [232]. The work on the neutron is discussed in the Dec. 2007 issue (page 37) of Scientific American.

    Originated a quantum mechanical treatment of HBT correlations that show that RHIC data was consistent with the presence of a chiral phase transition [211]. This work was discussed the Wall St. Journal (April 1, 2005) and in a Nature "News and Views" column by Wilczek Nature 435,152 (2005),

    Explained features of protein-protein interaction networks using a statistical treatment of free energy [221,223] Proc. Nat'l Acad. Sci.103, 11527 (2006),

    Studied possible explanations of the proton radius puzzle, including two photon exchange effects [251,255,264] and beyond the standard model explanations. Co-wrote a highly cited review [266]. Provided a testable hypothesis to explain the difference between radii extracted from muonic and electronic hydrogen experiments [264]. Tested the hypothesis of the existence of a new scalar boson that accounts for the extant data, and found ways to search for it [289]. I explained the meaning of the proton radius [303] and this work was selected to be discussed in ``This week in Physics" , March 7,2019 and Analog Magazine, Analog Magazine.

    Found new limits on the the nucleon strangeness s bar s content, and its effect on super- novae explosions [ 280,288].

    Presented new work [293] on how the effects of nucleon virtuality (failure of Einstein energy-momentum relation) could explain the EMC effect. This was part of a highly cited review [293]. My work on the EMC effect was part of a long article in Live Science, Jan 2, 2020. LiveScience,

    Studied [296] the nuclear physics needed to understand the explain the ``particle" production in the Beryllium-8 nucleus?. This work was discussed in the Jan./Feb. 2020 issue of the CERN Courier.

    Derived [311] a theorem that showed that the size of a proton increases when it is bound in a nucleus. This work was discussed in Physics Today online(DOI:10.1063/PT.6.1.20191224a) Dec. 24, 2020 Physics Today,.

    Found a new way to discuss color charge distributions of the proton [306].}

    Presented the first treatment of light-front Fock-space wave functions that involve 3 spatial dimensions (instead of 2 space, one momentum) [315].

    Analyzed ATOMKI experiment using an EFT approach that disproved any explanation that involves non-SM vector bosons [296,318]

    Provided the first relativistically-correct (light-front) formalism for the forces that act inside the proton, and used it to describe new data.[320,321]

    CV and Publications

    CV, pdf file

    Principal investigator, "Theoretical Nuclear Physics" Department of Energy grant DE-FG03-97ER41014