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Department of Applied Mathematics and Theoretical Physics

 

 

Research interests

I work in the field of hadron spectroscopy which can be understood using Quantum Chromodynamics (QCD), part of the Standard Model of Particle Physics. QCD is a strongly-coupled field theory at the energies where hadrons arise, meaning that perturbation theory cannot be applied, posing a significant calculational challenge. One method which has shown great promise in recent years is Lattice QCD, where the quantum fluctuations in a finite volume are sampled numerically using Monte-Carlo methods, to extract finite volume spectra. Using a mapping originally derived by Lüscher and extended by many others, these finite volume energy levels can be used to constrain infinite volume hadron scattering amplitudes. My current research is on numerical extractions of coupled-channel scattering amplitudes, which are in turn used to understand hadron resonances as poles in the complex energy plane.

I am a member of the Hadron Spectrum Collaboration: hadspec.org

 

Career

2019-present Royal Society University Research Fellow, DAMTP, University of Cambridge, UK
2018-2019 RS-SFI University Research Fellow, School of Mathematics, Trinity College Dublin, Ireland
2016-2018 Postdoc, School of Mathematics, Trinity College Dublin, Ireland
2015-2016 Postdoc, DAMTP, University of Cambridge, UK
2012-2015 Postdoc, Old Dominion University (and Jefferson Lab), Virginia, USA
2010-2012 Postdoc, Argonne National Laboratory, Illinois, USA
2006-2010 PhD student, IPPP, University of Durham, UK

Publications

Studies of nucleon resonance structure in exclusive meson electroproduction
IG Aznauryan, A Bashir, VM Braun, SJ Brodsky, VD Burkert, L Chang, C Chen, B El-Bennich, IC Cloët, PL Cole, RG Edwards, GV Fedotov, MM Giannini, RW Gothe, F Gross, HW Lin, P Kroll, TSH Lee, W Melnitchouk, VI Mokeev, MT Peña, G Ramalho, CD Roberts, E Santopinto, GF De Teramond, K Tsushima, DJ Wilson
– International Journal of Modern Physics E
(2013)
22,
1330015
Features and flaws of a contact interaction treatment of the kaon
C Chen, L Chang, CD Roberts, SM Schmidt, S Wan, DJ Wilson
– Physical Review C - Nuclear Physics
(2013)
87,
045207
Electric dipole moment of the ρ meson
M Pitschmann, CY Seng, MJ Ramsey-Musolf, CD Roberts, SM Schmidt, DJ Wilson
– Physical Review C
(2013)
87,
015205
Excited and exotic bottomonium spectroscopy from lattice QCD
SM Ryan, DJ Wilson
– PoS (Lattice 2012) 138
(2012)
Part F130497,
138
Spectrum of Hadrons with Strangeness
C Chen, L Chang, CD Roberts, S Wan, DJ Wilson
– Few-Body Systems
(2012)
53,
293
Investigation of rainbow-ladder truncation for excited and exotic mesons
SX Qin, L Chang, YX Liu, CD Roberts, DJ Wilson
– Physical Review C - Nuclear Physics
(2012)
85,
035202
Nucleon and Roper electromagnetic elastic and transition form factors
DJ Wilson, IC Cloët, L Chang, CD Roberts
– Physical Review C
(2012)
85,
025205
Flavor SU(4) breaking between effective couplings
B El-Bennich, G Krein, L Chang, CD Roberts, DJ Wilson
– Physical Review D - Particles, Fields, Gravitation and Cosmology
(2012)
85,
031502
Hadron physics and dynamical chiral symmetry breaking
L Chang, CD Roberts, DJ Wilson
– Proceedings of Science
(2011)
Vertex sensitivity in the schwinger-dyson equations of QCD
DJ Wilson, MR Pennington
– Proceedings of Science
(2011)
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Research Group

High Energy Physics

Room

B0.38