https://doi.org/10.1140/epja/i2015-15039-6
Regular Article - Theoretical Physics
Hadron wave functions as a probe of a two-color baryonic medium
1
Department of Physics, College of Science, Swansea University, Singleton Park, SA2 8PP, Swansea, UK
2
Department of Physics and Helsinki Institute of Physics, University of Helsinki, P.O. Box 64, FI-00014, Helsinki, Finland
3
Institut für Theoretische Physik, Universität Münster, Münster, Germany
* e-mail: aale85@gmail.com
Received:
23
January
2015
Revised:
9
March
2015
Accepted:
10
March
2015
Published online:
6
April
2015
The properties of the ground state of two-color QCD at non-zero baryon chemical potential μ present an interesting problem in strongly interacting gauge theory; in particular the nature of the physically relevant degrees of freedom in the superfluid phase in the post-onset regime μ > m π /2 still needs clarification. In this study we present evidence for in-medium effects at high μ by studying the wave functions of mesonic and diquark states using orthodox lattice simulation techniques, made possible by the absence of a sign problem for the model with N f = 2. Our results show that beyond onset the spatial extent of hadrons decreases as μ grows, and that the wave function profiles are consistent with the existence of a dynamically gapped Fermi surface in this regime.
© SIF, Springer-Verlag Berlin Heidelberg, 2015
