Thermal Dileptons at LHC

H. van Hees; R. Rapp

Thermal Dileptons at LHC

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arxiv 0706.4443 v2 pith:FXV54645 submitted 2007-06-29 hep-ph nucl-exnucl-th

H. van Hees , R. Rapp This is my paper · ORCID

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We predict dilepton invariant-mass spectra for central 5.5 ATeV Pb-Pb collisions at LHC. Hadronic emission in the low-mass region is calculated using in-medium spectral functions of light vector mesons within hadronic many-body theory. In the intermediate-mass region thermal radiation from the Quark-Gluon Plasma, evaluated perturbatively with hard-thermal loop corrections, takes over. An important source over the entire mass range are decays of correlated open-charm hadrons, rendering the nuclear modification of charm and bottom spectra a critical ingredient.

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Using next-to-leading-order rates, the paper predicts that dilepton polarization changes sign and magnitude in low and intermediate invariant-mass ranges, making it a sensitive probe of gluonic processes and pre-equil...

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