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The rate of photon production in the quark-gluon plasma from lattice QCD
We calculate the thermal rate of real-photon production in the quark-gluon plasma at a temperature of T=254 MeV using lattice QCD. The calculation is based on the difference between the spatially transverse and longitudinal parts of the polarization tensor, which has the advantage of falling off ra...
| Autores principales: | , , , , |
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| Lenguaje: | eng |
| Publicado: |
2020
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| Materias: | |
| Acceso en línea: | https://dx.doi.org/10.1103/PhysRevD.102.091501 http://cds.cern.ch/record/2706276 |
| _version_ | 1780964864527695872 |
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| author | Cè, Marco Harris, Tim Meyer, Harvey B. Steinberg, Aman Toniato, Arianna |
| author_facet | Cè, Marco Harris, Tim Meyer, Harvey B. Steinberg, Aman Toniato, Arianna |
| author_sort | Cè, Marco |
| collection | CERN |
| description | We calculate the thermal rate of real-photon production in the quark-gluon plasma at a temperature of T=254 MeV using lattice QCD. The calculation is based on the difference between the spatially transverse and longitudinal parts of the polarization tensor, which has the advantage of falling off rapidly at large frequencies. We obtain this linear combination in the time-momentum representation from lattice QCD with two flavors of quarks in the continuum limit with a precision of about two parts per mille. Applying a theoretically motivated fit ansatz for the associated spectral function, we obtain values for the photon rate that are in line with QCD weak-coupling calculations. A representative result is dΓ(k)/dk=(1.5-1.5+2.1)·(10 fm)-4·(0.2 GeV)-1 at k=1.2 GeV for the differential rate of photon production per unit volume of plasma. |
| id | cern-2706276 |
| institution | Organización Europea para la Investigación Nuclear |
| language | eng |
| publishDate | 2020 |
| record_format | invenio |
| spelling | cern-27062762022-09-08T02:37:00Zdoi:10.1103/PhysRevD.102.091501http://cds.cern.ch/record/2706276engCè, MarcoHarris, TimMeyer, Harvey B.Steinberg, AmanToniato, AriannaThe rate of photon production in the quark-gluon plasma from lattice QCDnucl-thNuclear Physics - Theoryhep-phParticle Physics - Phenomenologyhep-latParticle Physics - LatticeWe calculate the thermal rate of real-photon production in the quark-gluon plasma at a temperature of T=254 MeV using lattice QCD. The calculation is based on the difference between the spatially transverse and longitudinal parts of the polarization tensor, which has the advantage of falling off rapidly at large frequencies. We obtain this linear combination in the time-momentum representation from lattice QCD with two flavors of quarks in the continuum limit with a precision of about two parts per mille. Applying a theoretically motivated fit ansatz for the associated spectral function, we obtain values for the photon rate that are in line with QCD weak-coupling calculations. A representative result is dΓ(k)/dk=(1.5-1.5+2.1)·(10 fm)-4·(0.2 GeV)-1 at k=1.2 GeV for the differential rate of photon production per unit volume of plasma.We calculate the thermal rate of real-photon production in the quark-gluon plasma at a temperature of $T=254$ MeV using lattice QCD. The calculation is based on the difference between the spatially transverse and longitudinal parts of the polarization tensor, which has the advantage of falling off rapidly at large frequencies. We obtain this linear combination in the time-momentum representation from lattice QCD with two flavors of quarks in the continuum limit with a precision of about two parts per mille. Applying a theoretically motivated fit ansatz for the associated spectral function, we obtain values for the photon rate that are in line with QCD weak-coupling calculations; for photon momenta $ 1.0\leq k[{\rm GeV}]\leq 1.4$, our non-perturbative results constrain the rate to be no larger than twice the weak-coupling prediction. We also provide a physics interpretation of the electromagnetic spectral functions valid for all frequencies and momenta.arXiv:2001.03368CERN-TH-2020-004MITP/20-001oai:cds.cern.ch:27062762020-01-10 |
| spellingShingle | nucl-th Nuclear Physics - Theory hep-ph Particle Physics - Phenomenology hep-lat Particle Physics - Lattice Cè, Marco Harris, Tim Meyer, Harvey B. Steinberg, Aman Toniato, Arianna The rate of photon production in the quark-gluon plasma from lattice QCD |
| title | The rate of photon production in the quark-gluon plasma from lattice QCD |
| title_full | The rate of photon production in the quark-gluon plasma from lattice QCD |
| title_fullStr | The rate of photon production in the quark-gluon plasma from lattice QCD |
| title_full_unstemmed | The rate of photon production in the quark-gluon plasma from lattice QCD |
| title_short | The rate of photon production in the quark-gluon plasma from lattice QCD |
| title_sort | rate of photon production in the quark-gluon plasma from lattice qcd |
| topic | nucl-th Nuclear Physics - Theory hep-ph Particle Physics - Phenomenology hep-lat Particle Physics - Lattice |
| url | https://dx.doi.org/10.1103/PhysRevD.102.091501 http://cds.cern.ch/record/2706276 |
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