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Article overview
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An estimate for the thermal photon rate from lattice QCD | Bastian B. Brandt
; Anthony Francis
; Tim Harris
; Harvey B. Meyer
; Aman Steinberg
; | Date: |
19 Oct 2017 | Abstract: | We estimate the production rate of photons by the quark-gluon plasma in
lattice QCD. We propose a new correlation function which provides better
control over the systematic uncertainty in estimating the photon production
rate at photon momenta in the range {pi}T/2 to 2{pi}T. The relevant Euclidean
vector current correlation functions are computed with $N_{mathrm f}$ = 2
Wilson clover fermions in the chirally-symmetric phase. In order to estimate
the photon rate, an ill-posed problem for the vector-channel spectral function
must be regularized. We use both a direct model for the spectral function and a
model-independent estimate from the Backus-Gilbert method to give an estimate
for the photon rate. | Source: | arXiv, 1710.7050 | Services: | Forum | Review | PDF | Favorites |
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