Zobrazeno 1 - 10
of 83
pro vyhledávání: '"Peter Weisz"'
Autor:
Martin Lüscher, Peter Weisz
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 81, Iss 6, Pp 1-11 (2021)
Abstract To all orders of perturbation theory, the renormalization of the topological charge density in dimensionally regularized QCD is shown to require no more than an additive renormalization proportional to the divergence of the flavour-singlet a
Externí odkaz:
https://doaj.org/article/acadd2a5de174017b9f6a7d7f41b1173
Autor:
Peter Weisz, Martin Lüscher
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 81, Iss 6, Pp 1-11 (2021)
European Physical Journal
European Physical Journal
To all orders of perturbation theory, the renormalization of the topological charge density in dimensionally regularized QCD is shown to require no more than an additive renormalization proportional to the divergence of the flavour-singlet axial curr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b8cc41e2b78372a8503fdb66910bcfc5
Autor:
Ferenc Niedermayer, Peter Weisz
Publikováno v:
Journal of High Energy Physics, Vol 2017, Iss 6, Pp 1-36 (2017)
Journal of High Energy Physics
Journal of High Energy Physics
We compute the isospin susceptibility in an effective O($n$) scalar field theory (in $d=4$ dimensions), to third order in chiral perturbation theory ($\chi$PT) in the delta--regime using the quantum mechanical rotator picture. This is done in the pre
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::190f83f1a4f8b2dd0218506e73ed5912
http://link.springer.com/article/10.1007/JHEP06(2017)150
http://link.springer.com/article/10.1007/JHEP06(2017)150
Publikováno v:
Progress of Theoretical and Experimental Physics
We investigate some properties of the standard rotator approximation of the SU$(N)\times\,$SU$(N)$ sigma-model in the delta-regime. In particular we show that the isospin susceptibility calculated in this framework agrees with that computed by chiral
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7410c661c4cc30f68d950b0aff350590
Autor:
Peter Weisz, Ferenc Niedermayer
Publikováno v:
Progress of Theoretical and Experimental Physics. 2018
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5a1f75bab7cf50e158b96da97ce788e9
https://doi.org/10.1093/ptep/pty103
https://doi.org/10.1093/ptep/pty103
Autor:
Peter Weisz, Ferenc Niedermayer
Publikováno v:
Journal of High Energy Physics, Vol 2018, Iss 5, Pp 1-24 (2018)
Journal of High Energy Physics
Journal of High Energy Physics
In a previous paper we found that the isospin susceptibility of the O($n$) sigma-model calculated in the standard rotator approximation differs from the next-to-next to leading order chiral perturbation theory result in terms vanishing like $1/\ell\,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::74422f72f9624e962ccff4c683f17e5d
https://doi.org/10.1007/jhep05(2018)070
https://doi.org/10.1007/jhep05(2018)070
Publikováno v:
Progress of Theoretical and Experimental Physics
We study the flow equation of the O($N$) $\varphi^4$ model in $d$ dimensions at the next-to-leading order (NLO) in the $1/N$ expansion. Using the Schwinger-Dyson equation, we derive 2-pt and 4-pt functions of flowed fields. As the first application o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6f015a010f34ce2afb514ebbaee553f7
Publikováno v:
Progress of Theoretical and Experimental Physics
We study the proposal that a $d+1$ dimensional induced metric is constructed from a $d$ dimensional field theory using gradient flow. Applying the idea to the O($N$) $\varphi^4$ model and normalizing the flow field, we have shown in the large $N$ lim
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::facb464cf15e3453ee209dbd48a01c40
http://repo.scoap3.org/api
http://repo.scoap3.org/api
Autor:
Peter Weisz, Ferenc Niedermayer
Publikováno v:
Journal of High Energy Physics
This paper discusses the methods and the results used in an accompanying paper describing the matching of effective chiral Lagrangians in dimensional and lattice regularizations. We present methods to compute 2-loop massless sunset diagrams in finite
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bde0ccf458dd6e57ca4a72e7568f5d20
https://doi.org/10.1007/jhep06(2016)102
https://doi.org/10.1007/jhep06(2016)102
Autor:
Peter Weisz, Ferenc Niedermayer
Publikováno v:
Journal of High Energy Physics
We compute the free energy in the presence of a chemical potential coupled to a conserved charge in effective O($n$) scalar field theory (without explicit symmetry breaking terms) to NNL order for asymmetric volumes in general $d$--dimensions, using
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::93bc0ef567c6694943230112e4eb1d6d
http://repo.scoap3.org/api
http://repo.scoap3.org/api