Zobrazeno 1 - 10
of 1 203
pro vyhledávání: '"Lowdon P"'
Autor:
Lowdon, Peter, Philipsen, Owe
Publikováno v:
JHEP 08 (2024) 167
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 vacuum theory. In this work, we use lattice simulations of scalar correla
Externí odkaz:
http://arxiv.org/abs/2405.02009
Autor:
Lowdon Peter, Philipsen Owe
Publikováno v:
EPJ Web of Conferences, Vol 274, p 05013 (2022)
In quantum field theories at finite temperature spectral functions describe how particle systems behave in the presence of a thermal medium. Although data from lattice simulations can in principle be used to determine spectral function characteristic
Externí odkaz:
https://doaj.org/article/e88cbde4539e4726826d694082180372
Publikováno v:
JHEP 05 (2024) 332
Determining the type of excitations that can exist in a thermal medium is key to understanding how hadronic matter behaves at extreme temperatures. In this work we study this question for pseudo-scalar mesons comprised of light-strange and strange-st
Externí odkaz:
http://arxiv.org/abs/2310.13476
Autor:
Peter Lowdon, Owe Philipsen
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 8, Pp 1-22 (2024)
Abstract 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 vacuum theory. In this work, we use lattice simulations of scala
Externí odkaz:
https://doaj.org/article/1bf20f4ccf60443eb060745f1a869d92
Recently, an approximate $SU(4)$ chiral spin-flavour symmetry was observed in multiplet patterns of QCD meson correlation functions, in a temperature range above the chiral crossover. This symmetry is larger than the chiral symmetry of massless QCD,
Externí odkaz:
http://arxiv.org/abs/2211.11628
Autor:
Lowdon, Peter, Philipsen, Owe
Publikováno v:
JHEP 10 (2022) 161
Spectral functions encode a wealth of information about the dynamics of any given system, and the determination of their non-perturbative characteristics is a long-standing problem in quantum field theory. Whilst numerical simulations of lattice QCD
Externí odkaz:
http://arxiv.org/abs/2207.14718
Autor:
Lowdon, Peter, Tripolt, Ralf-Arno
Publikováno v:
Phys. Rev. D 106, 056006 (2022)
In this work we apply a local quantum field theory approach in order to analyse the connection between real-time observables and Euclidean thermal correlation functions. In particular, using data generated from the functional renormalisation group in
Externí odkaz:
http://arxiv.org/abs/2202.09142
Autor:
Lowdon, Peter
Publikováno v:
Phys. Rev. D 106, 045028 (2022)
In this work we outline the general analytic characteristics satisfied by scalar correlation functions at finite temperature in local quantum field theory. We demonstrate that the locality of the fields in particular imposes significant constraints o
Externí odkaz:
http://arxiv.org/abs/2201.12180
Publikováno v:
Phys. Lett. B 823 (2021) 136753
In BRST-quantised Yang-Mills theory the existence of BRST symmetry imposes significant constraints on the analytic structure of the continuum theory. In particular, the presence of this symmetry in the non-perturbative regime implies that any on-shel
Externí odkaz:
http://arxiv.org/abs/2109.10942
Publikováno v:
Phys. Rev. D 104, 065010 (2021)
In local scalar quantum field theories (QFTs) at finite temperature correlation functions are known to satisfy certain non-perturbative constraints, which for two-point functions in particular implies the existence of a generalisation of the standard
Externí odkaz:
http://arxiv.org/abs/2104.13413