Description
Discussion leader: Gert Aarts
Chairperson: Gert Aarts
We map out the QCD phase structure with functional approaches. By now the results for the phase structure from these approaches also converge at large densities, including the location of the critical end point. We evaluate the remaining systematic errors and tasks, as well the the prospects.
I will discuss the limits of current methods to calculate the equation of state of QCD matter at finite baryon density. All methods based on expanding lattice QCD results show to be limitred to $\mu_B/T<3$ a region where contributions from the net baryon density are negligible. Therefore I will show how it is possible to use constraints from astrophysical observations of neutron stars and...
We investigate the phase transition from hadron to quark matter in the general case without the
assumption of chemical equilibrium. The effects of net strangeness on charge and isospin fractions,
chemical potentials, and temperature are studied in the context of the Chiral Mean Field (CMF)
model that incorporates chiral symmetry restoration and deconfinement. The extent to which
these...
We will show the continuum extrapolated results for all second order and some of the fourth order cumulants of net baryon-number, strangeness and electric charge fluctuations as well as their correlations obtained using the Highly Improved Staggered Quark (HISQ) action in (2+1)-flavour QCD by the HotQCD collaboration. We will show comparisons of our results with hadron resonance gas (HRG)...
QCD crossover line at finite chemical potential from the Lattice
An efficient way to study the QCD phase diagram at small finite density
is to extrapolate thermodynamical observables from imaginary chemical potential.
The phase diagram features a crossover line starting from the
transition temperature already determined at zero chemical potential.
This talk focuses on the Taylor expansion of...
Recent lattice QCD calculations show strong indications that the chiral crossover of QCD at zero baryon chemical potential \mu_B is a remnant of the second-order chiral phase transition. Furthermore, the non-universal parameters needed to map temperature T and \mu_B to the universal properties of the second-order chiral phase transition have been determined recently. Motivated by these...
We discuss a framework for studying the properties of the Lefschetz
thimbles decomposition for lattice fermion models. Non-iterative
solver for the inversion of fermion determinants forms the core of the
method. It allows us to solve the gradient flow (GF) equations taking
into account the fermion determinant exactly. Being able to do so, we
can find both real and complex saddle points of the...
