6533b861fe1ef96bd12c5869
RESEARCH PRODUCT
Lattice QCD estimate of the quark-gluon plasma photon emission rate
Bastian B. BrandtAnthony FrancisArianna ToniatoAman SteinbergMarco CèTim HarrisHarvey B. Meyersubject
PhysicsParticle physics010308 nuclear & particles physicsHigh Energy Physics::LatticeHigh Energy Physics - Lattice (hep-lat)FOS: Physical scienceshep-latLattice QCDParticle Physics - LatticeLattice QCD01 natural sciencesHigh Energy Physics - LatticePhoton emission0103 physical sciencesQuark–gluon plasmaQuark-Gluon Plasma010306 general physicsdescription
We present a computation of the photon emission rate of the quark-gluon plasma from two-flavor lattice QCD at a temperature of 254 MeV, which follows up on the work presented in [1]. We perform a continuum extrapolation of the vector-current correlator, and consider a linear combination of the Lorentz indices corresponding to a UV-finite spectral function. To extract the spectral function from the lattice correlators, an ill-posed inverse problem, we model the spectral function with a Pad\'e ansatz. We further constrain our analysis by simultaneously fitting data with different momenta. We present results for a multi-momentum fit including the three smallest momenta available from our lattice analysis.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2019-11-30 | Proceedings of 37th International Symposium on Lattice Field Theory — PoS(LATTICE2019) |