Speaker
Sandor Katz
(Eotvos University)
Description
The strong CP problem of QCD can be solved via the Peccei-Quinn mechanism. The resulting pseudo-Goldstone bosons, the axions are natural candidates for dark matter. In order to quantitatively understand axion dark matter production two important QCD inputs are required: the equation of state and the topological susceptibility at high temperatures. We determine these quantities and use them to determine the axion mass in different axion production scenarios.
Summary
We determine the equation of state and the topological susceptibility
at high temperatures using lattice QCD and apply them to determine the axion mass in different axion dark matter scenarios.
Primary author
Sandor Katz
(Eotvos University)
Co-authors
Andreas Ringwald
(Deutsches Elektronen-Synchrotron DESY)
Ferenc Pittler
(PTE)
Szabolcs Borsanyi
(University of Wuppertal)
Tamas G. Kovacs
(Institute for Nuclear Physics, Debrecen)
Zoltan Fodor
(BUW)
