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<a id="main"></a><h1>Nuclear Theory at the College of William and Mary</h1>
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  <p>
  
  
Our group performs theoretical calculations relevant to nuclear and
  hadron physics within the theory of
  quarks and gluons, Quantum Chromodynamics (QCD). We have a
  particular interest in the numerical technique known as <i>lattice
  QCD</i>. We mentor postdoctoral researchers and graduate and undergraduate
  students pursuing research in nuclear theory, and we maintain a
  close connection with the nearby Jefferson Lab, where we are members
  of the Theory Center.
  </p>
  
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<a id="main"></a><h1>News</h1>
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      <h2>  
        Sigma meson paper promoted by Jefferson Lab
      </h2>
       <p>
       A recent publication presenting work led by Arkaitz Rodas
    during his time as a postdoc in our group is discussed in a
    Jefferson Lab <a
      href="https://www.jlab.org/news/stories/pooling-skills-study-slippery-particle">press
    release</a>. 
     </p>
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      <h2>  
        Congratulations to Felipe Ortega-Gama
      </h2>
      <p>
  Felipe recently successfully defended his PhD thesis entited,
       <i>Transitions to Two-Hadron States from Quantum Chromodynamics</i>, and will now take up a postdoctoral position
    at Berkeley.

       He is pictured with his defense committee.
       
   <b>Congratulations, Felipe!</b>
     </p>
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     <td class="highlights">
      <h2>  
        Congratulations to Archana Radhakrishnan
      </h2>
      <p>
  Archana recently successfully defended her PhD thesis entited,
       <i>Radiative Width of K*(892) from Lattice Quantum
    Chromodynamics</i>, and will now take up a postdoctoral position
    at the Tata Institute of Fundamental Research in Mumbai,
       India.

       She is pictured at Commencement alongside advisor Dudek, demonstrating the
       patented "analog Zoom" technology.
       
   <b>Congratulations, Archana!</b>
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      <h2>  
        Congratulations to three new PhDs.
      </h2>
      <p>
  Group members Colin Egerer, Chris Johnson and Yiyu Zhou recently
       successfully defended PhD theses entited,
       <i>Forward & Off-Forward Parton Distributions from Lattice QCD</i>,
       <i>Excited J-- Resonances in Meson-Meson Scattering from
      Lattice QCD</i>, and
       <i>Proton Spin Structure from Simultaneous Monte Carlo Global
      QCD Analysis</i>. They will next take their respective talents to Jefferson Lab,
      GSI Darmstadt, and UCLA/South China Normal Univeristy as
      postdoctoral fellows. <b>Congratulations to them all!</b>
     </p>
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      <h2>  
        Congratulations to Felipe
      </h2>
      <p>
       Group member Felipe Ortega was recently awarded a W&amp;M
      International Student Achievement Award recognizing his
      explemary performance in academics and his tireless service to
      the college. 
     </p>
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      <h2>  
        Supercomputers aid scientists studying the smallest particles in the universe
      </h2>
      <p>
	A recent Physical
       Review Letters <a
      href="https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.125.232003">publication</a>,
       <i>"Parton Distribution Functions from Ioffe Time
      Pseudodistributions from Lattice Calculations: Approaching the
      Physical Point"</i>, authored by a team including Kostas Orginos,
      adjunct group member David Richards, former graduate student Joe
      Karpie, and former group postdoc Savvas Zafieropoulos, was
      recently highlighted on the Oak Ridge National Laboratory News. See full article <a href="https://www.ornl.gov/news/supercomputers-aid-scientists-studying-smallest-particles-universe">here</a>.
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      <h2>  
      New preprint on $J^{--}$ resonances released
      </h2>

      <p>
      A preprint, <i>"Excited $J^{--}$ meson resonances at the SU(3)
      flavor point from lattice QCD"</i>, reporting on work done by
      graduate student Chris Johnson, has appeared on the <a href="https://arxiv.org/abs/2012.00518"
     style="text-decoration:none">arXiv</a>. It presents lattice QCD calculations
      showing the presence of four excited resonances in
      pseudoscalar-vector scattering, following from description of an
      unprecedented number of finite-volume energy levels.
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      <h2>  
      Center for Nuclear Femtography grant supports summer research
      </h2>

      <p>
   Our grant <i>Nucleon Structure from lattice QCD</i>, awarded by the Center for Nuclear Femtography, supported undergraduate summer research by Joshua O'Cain as part of our efforts to unravel the internal structure of protons and neutrons. Working with graduate students and postdocs in our group, Joshua analyzed lattice data to extract the fraction of the momentum of a fast-moving proton carried by the gluons inside the proton. 
      </p>
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      <h2>  
      Arkaitz Rodas releases $\pi K$ scattering review article
      </h2>

      <p>
    Group member Arkaitz Rodas, in collaboration with his former
     PhD advisor, Jos&eacute; Ram&oacute;n Pel&aacute;ez, has produced a comprehensive
     review of the physics of $\pi K$ scattering using the theoretical
     technique of dispersion relations. The controversial
    $\kappa/K^*_0(700)$ resonance and new threshold parameters are
    obtained. The preprint, which has been
     submitted to Physics Reports, can be read <a href="https://arxiv.org/pdf/2010.11222.pdf"
     style="text-decoration:none">here</a>.     
      </p>
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      <h2>  
      Welcome to our new postdocs
      </h2>

      <p>
      Two new postdoctoral associates have joined the group. Nikhil
      Karthik comes to us from Brookhaven National Lab, and Raza
      Sufian from Jefferson Lab. Both are experts in lattice QCD.      
      </p>
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      <h2>  
      Busy January for Preprints
      </h2>

      <p>
The group has had a busy January, releasing several preprints. Read
      them here:<br/>

<i>Pion Valence Quark Distibution at
      Large x from Lattice QCD</i> <a href="https://arxiv.org/abs/2001.04960"
     style="text-decoration:none">[2001.04960]</a> <br/>

      <i>Determination of the lighest strange
      resonance from a dispersive data analysis</i> <a href="https://arxiv.org/abs/2001.08153"
     style="text-decoration:none">[2001.08153]</a> <br/>

      <i>Efficient solution of the
     multi-channel Luescher determinant condition through eigenvalue
     decomposition</i> <a href="https://arxiv.org/abs/2001.08474"
     style="text-decoration:none">[2001.08474]</a><br/>

   <i>Low energy doubly-virtual Compton
     scattering from di-lepton electroproduction on a nucleon</i> <a href="https://arxiv.org/abs/2001.10626"
     style="text-decoration:none">[2001.10626]</a> <br/>
      
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      <h2>  
      Chris Monahan joins the group
      </h2>

      <p>
 Chris Monahan joins us as an Assistant Professor in the Fall of 2019,
 bringing expertise in formal aspects of lattice QCD, lattice
 perturbation theory and $B$-physics.
      </p>
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      <h2>  
      $\pi K$ scattering calculation appears in Physical Review Letters
      </h2>

      <p>
The dependence of S-wave and P-wave $\pi K$ scattering on the mass of
      the light quark is studied in lattice QCD. The narrow vector
      $K^*$ resonance is observed clearly, becoming lighter and
      broader as the quark mass is reduced, while a slowly varying
      phase-shift is seen in S-wave. 
      </p>
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      <h2>  
      Joe Karpie graduates with PhD degree
      </h2>

      <p>
Joe Karpie successfully defended his PhD thesis, and leaves us to take
      up a postdoc at Columbia.
      </p>
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      <h2>  
      First per-cent level lattice QCD determination of $g_A$ published in Nature
      </h2>

      <p>
    A team including Kostas Orginos has computed the axial coupling of
    the nucleon within lattice QCD at an unprecedented level of
    precision. The work appears in <a href="https://www.nature.com/articles/s41586-018-0161-8"
     style="text-decoration:none"> Nature</a>.
      </p>
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      <h2>  
      Dudek appointed to Nuclear Science Advisory Committee
      </h2>

      <p>
    Jo Dudek will serve on the committee (<a href="https://science.energy.gov/np/nsac/"
     style="text-decoration:none">NSAC</a>), which was established in 1977 to
    provide advice and recommendations to DOE and NSF on scientific, technical, and
    programmatic issues relating to the nuclear physics program, until April 2021.
      </p>
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      <h2>  
       Review of scattering and resonance physics using lattice QCD
       published in RMP
      </h2>

      <p>
     A pedagogic review of the progress made recently in determining
     the properties of unstable hadron resonances in lattice QCD has
     appeared in <a
     href="https://journals.aps.org/rmp/abstract/10.1103/RevModPhys.90.025001"
     style="text-decoration:none"> Reviews of Modern Physics</a>. The
     paper was authored by Jo Dudek, Raul Briceno (ODU/JLab) and Ross
     Young (Adelaide). 
      </p>
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      <h2>  
       Colin Egerer awarded DoE Graduate Student Research fellowship
      </h2>

      <p>
     The award will support Colin's ongoing research into the
     structure of hadrons using lattice QCD tools under the
     supervision of David Richards and Kostas Orginos.
      </p>
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      <h2>
       Kostas Orginos sabbatical
      </h2>

      <p>
      Kostas will be on sabbatical at the University of Cambridge, UK for the academic
      year 2017-2018.
      </p>
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      <h2>
       Carl Carlson sabbatical
      </h2>

      <p>
      Carl will be on sabbatical at the Johannes Gutenberg-University, Mainz, Germany for the academic year 2017-2018.
      </p>
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      <h2>  
       Paper on $f_0, f_2$ resonances selected as "Editors'
      Suggestion" in Phys.Rev.D

      </h2>

      <p>
     <a href="https://journals.aps.org/prd/abstract/10.1103/PhysRevD.97.054513" style="text-decoration:none"> A paper</a> co-authored by Jo Dudek studying low-lying resonances in
     coupled $\pi\pi, K\overline{K}, \eta\eta$ scattering has been
     selected to appear on the PRD website front-page by the Editors
     of the journal.
      </p>
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      <h2>
       Joe Karpie awarded DoE Fellowship
      </h2>

      <p>
       Joe Karpie is the recipient of an award from the Department of Energy’s Office of
       Science Graduate Student Research Program. Karpie is one of 53 graduate students, representing 45 U.S. universities, who have received the DOE award. Karpie studies theoretical and computational aspects of quantum chromodynamics (QCD) at the DOE’s Thomas Jefferson National Accelerator Facility (JLab) in Newport News.
      </p>
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      <h2>  
      We are hiring!
      </h2>

      <p>
   The Department of Physics at William & Mary invites applications
   for a <b>tenure track Assistant Professor</b> position in theoretical
   hadronic physics to begin in August 2019. <a href="https://jobs.wm.edu/postings/33185"
      style="text-decoration:none"> More details here</a>.
      </p>

      <p>
   The nuclear theory group also invites applications for at least one 
      <b>Postdoctoral Research Associate</b> position to begin in
      September 2019. <a href="https://jobs.wm.edu/postings/33878"
      style="text-decoration:none"> More details
      here</a>. Applications must be received by December 10th.
      </p>
    </td>
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