TY  - JOUR
A1  - Qin, Si-xue
T1  - A divergence-free method to extract observables from correlation functions
T2  - Physics Letters B
N2  - Correlation functions provide information on the properties of mesons in vacuum and of hot nuclear matter. In this work, we present a new method to derive a well-defined spectral representation for correlation functions. Combining this method with the quark gap equation and the inhomogeneous Bethe–Salpeter equation in the rainbow-ladder approximation, we calculate in-vacuum masses of light mesons and the electrical conductivity of the quark–gluon plasma. The analysis can be extended to other observables of strong-interaction systems.
KW  - Hadron spectroscopy
KW  - Quark–gluon plasma
KW  - Transport properties
KW  - Electrical conductivity
KW  - Spectral functions
KW  - Dyson–Schwinger equations
KW  - Bethe–Salpeter equation
KW  - Nonperturbative methods
Y1  - 2015
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/54704
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-547042
SN  - 1873-2445
SN  - 0370-2693
VL  - 742.2015
SP  - 358
EP  - 362
PB  - Elsevier
CY  - Amsterdam
ER  -