743 citations · 6.1k across the 178 of their papers we have counts for
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Towards a consistent perturbation theory at finite temperature
Passant Ali, Peter Lowdon, Owe Philipsen
The standard approach to perturbation theory for finite-temperature quantum field theories has several issues, including the appearance of ill-defined on-shell contributions in the…
Emergent chiral spin symmetry, non-perturbative dynamics and thermoparticles in hot QCD
Owe Philipsen
Several non-perturbative results for hot QCD are challenging some aspects of the phase diagram and its associated degrees of freedom which were previously believed to be well under…
Goldstone bosons at non-zero temperature
Peter Lowdon, Owe Philipsen
Spontaneous symmetry breaking in quantum field theories at non-zero temperature still holds fundamental open questions, in particular what happens to vacuum Goldstone bosons when t…
Spectral properties of pseudo-scalar mesons through the QCD chiral crossover
Peter Lowdon, Owe Philipsen
We summarise recent progress towards the non-perturbative determination of thermal spectral functions for pseudo-scalar mesons in QCD by exploiting constraints imposed by micro-cau…
Non-perturbative constraints on perturbation theory at finite temperature
Peter Lowdon, Owe Philipsen
It has long been understood that the inclusion of temperature in the perturbative treatment of quantum field theories leads to complications that are not present at zero temperatur…
On the (in)consistency of perturbation theory at finite temperature
Peter Lowdon, Owe Philipsen
A well-known difficulty of perturbative approaches to quantum field theory at finite temperature is the necessity to address theoretical constraints that are not present in the vac…
Chiral spin symmetry and the QCD phase diagram
Leonid Ya. Glozman, Owe Philipsen, Robert D. Pisarski
Lattice QCD simulations with chirally symmetric quarks have recently established approximate and symmetries of the quantum effective action in a temperature…
Complete leading-order standard model corrections to quantum leptogenesis
Paul Frederik Depta, Andreas Halsch, Janine Hütig +2
Thermal leptogenesis, in the framework of the standard model with three additional heavy Majorana neutrinos, provides an attractive scenario to explain the observed baryon asymmetr…
QCD equation of state at finite baryon density with fugacity expansion
Volodymyr Vovchenko, Jan Steinheimer, Owe Philipsen +1
We explore the QCD equation of state at finite baryon density through an expansion in baryon number fugacity, making use of the recent lattice data on the four leading Fourier coef…
Cluster Expansion Model for QCD Baryon Number Fluctuations: No Phase Transition at
Volodymyr Vovchenko, Jan Steinheimer, Owe Philipsen +1
A Cluster Expansion Model (CEM), representing a relativistic extension of Mayer's cluster expansion, is constructed to study baryon number fluctuations in QCD. The temperature depe…
A real-time lattice simulation of the thermalization of a gluon plasma: first results
Maximilian Attems, Owe Philipsen, Christian Schäfer +2
To achieve an understanding of the thermalization of a quark-gluon plasma, starting from QCD without using model assumptions, is a formidable task. We study the early stage dynamic…
Resummation scheme for 3d Yang-Mills and the two-loop magnetic mass for hot gauge theories
D. Bieletzki, K. Lessmeier, O. Philipsen +1
Perturbation theory for non-Abelian gauge theories at finite temperature is plagued by infrared divergences caused by magnetic soft modes , which correspond to the field…
Status of the QCD phase diagram from lattice calculations
Owe Philipsen
The present knowledge of the QCD phase diagram based on simulations of lattice QCD is summarised. The main questions are whether there is a critical point in the QCD phase diagram…
Screened perturbation theory for 3d Yang-Mills theory and the magnetic modes of hot QCD
Owe Philipsen, Daniel Bieletzki, York Schroder
Perturbation theory for non-abelian gauge theories at finite temperature is plagued by infrared divergences which are caused by magnetic soft modes ~g^2T, corresponding to gluon fi…
Towards a determination of the chiral critical surface of QCD
Owe Philipsen
The chiral critical surface is a surface of second order phase transitions bounding the region of first order chiral phase transitions for small quark masses in the {m_{u,d}, m_s,μ…
On quarkonium in an anisotropic quark gluon plasma
O. Philipsen, M. Tassler
We reconsider a plasma with an anisotropy imposed on the momentum distribution of the system and study the real time static potential for quarkonia. The distribution function is no…
Towards the chiral critical surface of QCD
Owe Philipsen
The critical endpoint of the QCD phase diagram is usually expected to belong to the chiral critical surface, i.e. the surface of second order transitions bounding the region of fir…
Heavy Quark Thermalization in Classical Lattice Gauge Theory: Lessons for Strongly-Coupled QCD
Mikko Laine, Guy D. Moore, Owe Philipsen +1
Thermalization of a heavy quark near rest is controlled by the correlator of two electric fields along a temporal Wilson line. We address this correlator within real-time, classica…
Static potentials for quarkonia at finite temperatures
Owe Philipsen
We review non-perturbative static potentials commonly used in potential models for quarkonia at finite T. Potentials derived from Polyakov loop correlators are shown to be inapprop…
Status of Lattice Studies of the QCD Phase Diagram
Owe Philipsen
Determining the QCD phase diagram is a pressing task in view of its relevance for nuclear and astro-particle physics programmes. We review the current status of lattice calculation…
Exploring the QCD phase diagram
Owe Philipsen
Lattice simulations employing reweighting and Taylor expansion techniques have predicted a (μ,T)-phase diagram according to general expectations, with an analytic quark-hadron cros…
Real-time static potential in hot QCD
M. Laine, O. Philipsen, P. Romatschke +1
We derive a static potential for a heavy quark-antiquark pair propagating in Minkowski time at finite temperature, by defining a suitable gauge-invariant Green's function and compu…
Screening of Z(N) monopole pairs in gauge theories
Ph. de Forcrand, C. Korthals-Altes, O. Philipsen
The screening of magnetic Z(N)-monopoles and the associated screening length in SU(N) gauge theories are analyzed theoretically, and computed numerically in the 3d SU(2) theory. Th…
WIMP Dark Matter and the QCD Equation of State
Mark Hindmarsh, Owe Philipsen
Weakly Interacting Massive Particles (WIMPs) of mass m freeze out at a temperature T_f ~ m/25, i.e. in the range 400 MeV -- 40 GeV for a particle in the typical mass range 10 -- 10…