Vacuum correlators at short distances from lattice QCD

Autor: Marco Cè, Tim Harris, Harvey B. Meyer, Arianna Toniato, Csaba Török

Publikováno v: Journal of High Energy Physics, Vol 2021, Iss 12, Pp 1-37 (2021)
Proceedings of The 38th International Symposium on Lattice Field Theory — PoS(LATTICE2021)
Journal of high energy physics 2021(12), 215 (2021). doi:10.1007/JHEP12(2021)215
Journal of High Energy Physics
Scopus-Elsevier

Non-perturbatively computing the hadronic vacuum polarization at large photon virtualities and making contact with perturbation theory enables a precision determination of the electromagnetic coupling at the $Z$ pole, which enters global electroweak

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::90cce8eb071824a5cc2b5110fc3ba532
https://doaj.org/article/d9c86ab964bc497ca8e089859eb43fa4

Improving the lattice axial vector current

Autor: Yoshifumi Nakamura, Gerrit Schierholz, Roger Horsley, Paul E.L. Rakow, Holger Perlt, James Zanotti, Arwed Schiller

Publikováno v: Scopus-Elsevier
Proceedings of Science (2015). doi:10.22323/1.251.0138
Proceedings of The 33rd International Symposium on Lattice Field Theory — PoS(LATTICE 2015)-Sissa Medialab Trieste, Italy, 2016.-ISBN-doi:10.22323/1.251.0138
Proceedings of The 33rd International Symposium on Lattice Field Theory — PoS(LATTICE 2015)-Sissa Medialab Trieste, Italy, 2016.-ISBN-doi:10.22323/1.251.013833rd International Symposium on Lattice Field Theory (Lattice 2015), Kobe, Japan, 2015-07-14-2015-07-18

For Wilson and clover fermions traditional formulations of the axial vector current do not respect the continuum Ward identity which relates the divergence of that current to the pseudoscalar density. Here we propose to use a point-split or one-link

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7a2e7cdda8d82f0e698c8fedf322c7e8
http://arxiv.org/abs/1511.05304

Renormalization of local quark-bilinear operators for Nf=3 flavors of SLiNC fermions

Autor: Constantinou, M., Horsley, R., Panagopoulos, H., Perlt, H., Rakow, P. E. L., Schierholz, G., Schiller, A., Zanotti, J. M.

The renormalization factors of local quark-bilinear operators are computed non-perturbatively for $N_f=3$ flavors of SLiNC fermions, with emphasis on the various procedures for the chiral and continuum extrapolations. The simulations are performed at

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9312a3fa5c3e1be4eaa0bde780e36e57

Heavy-to-light decays on the lattice

Autor: Müller, Eike Hermann

Precise predictions of hadronic matrix elements in heavy meson decays are important to constrain the fundamental parameters in the Standard Model of particle physics. The CKM matrix element Vub can be extracted from experimental data on the decay B �

Externí odkaz: http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.562602

The Lattice Free Energy of QCD with Clover Fermions, up to Three-Loops

Autor: Athenodorou, A., Panagopoulos, Haralambos G., Tsapalis, Antonios

Publikováno v: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Phys Lett Sect B Nucl Elem Part High-Energy Phys

We calculate the perturbative value of the free energy in Lattice QCD, up to three loops. Our calculation is performed using Wilson gluons and the Sheikholeslami - Wolhert (clover) improved action for fermions. The free energy is directly related to

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9862aabb8353339759e4a4b0a2e11987