Zobrazeno 1 - 10
of 18
pro vyhledávání: '"Julien Frison\\'"'
Autor:
Alpha Collaboration, Andrea Bussone, Alessandro Conigli, Julien Frison, Gregorio Herdoíza, Carlos Pena, David Preti, Alejandro Sáez, Javier Ugarrio
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 84, Iss 5, Pp 1-27 (2024)
Abstract We present our first set of results for charm physics, using the mixed-action setup introduced in a companion paper [1]. Maximally twisted Wilson valence fermions are used on a sea of non-perturbatively O(a)-improved Wilson fermions, made up
Externí odkaz:
https://doaj.org/article/9e1dce2fea1c42c99552edfd82b4e5a2
Autor:
Alessandro Conigli, Julien Frison, Gregorio Herdoiza, Carlos Pena, Alejandro Saez, Javier Ugarrio
We report on our first set of results for charm physics, using a mixed-action setup with maximally twisted valence fermions on CLS $N_f=2+1$ ensembles. This setup avoids the need of improvement coefficients to subtract $O(am_c)$ effects. The charm qu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::97bdc681187357f8a1227822499293fb
http://arxiv.org/abs/2212.11045
http://arxiv.org/abs/2212.11045
Autor:
Alessandro Conigli, Andrea Bussone, Julien Frison\\', Gregorio Herdoiza, Carlos Pena, David Preti, Jose Angel Romero, Javier Ugarrio
Publikováno v:
Proceedings of The 38th International Symposium on Lattice Field Theory — PoS(LATTICE2021).
We report on our ongoing determination of the charm quark mass and the masses and decay constants of various charmed mesons, obtained within a mixed-action setup. We employ $N_f=2+1$ CLS ensembles combined with a Wilson twisted mass valence action th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3d94704c02e981f9b5b09d8090423a19
https://doi.org/10.22323/1.396.0091
https://doi.org/10.22323/1.396.0091
Publikováno v:
Proceedings of 37th International Symposium on Lattice Field Theory — PoS(LATTICE2019)
The first phase of a heavy quark program based on twisted mass valence quarks has been presented at last years's lattice conference. The CLS $N_f=2+1$ ensembles were used for their fine lattice spacing, while twisting the masses is expected to reduce
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7f0c9efeda637ec3fd12e41b47173147
Publikováno v:
EPJ Web of Conferences, Vol 175, p 14017 (2018)
One of the historical suggestions to tackle the strong CP problem is to take the up quark mass to zero while keeping $m_d$ finite. The $\theta$ angle is then supposed to become irrelevant, i.e. the topological susceptibility vanishes. However, the de
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dffeee3184e1e1dc1732775feb23c445
https://doaj.org/article/44134b5b516c49b895413e8b6f680d72
https://doaj.org/article/44134b5b516c49b895413e8b6f680d72
Publikováno v:
Proceedings of 34th annual International Symposium on Lattice Field Theory — PoS(LATTICE2016).
$m_u=0$ has long been proposed as a solution to the strong CP problem. While this solution is sometimes thought to have been excluded, it is actually still ill-defined. In this work, we study the mass dependence of the physical observable $\chi_t$, t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e85316192a1f94e7001e11615c48dd0b
https://doi.org/10.22323/1.256.0323
https://doi.org/10.22323/1.256.0323
Autor:
Stefan Krieg, Sandor D. Katz, Julien Frison, A. Schäfer, Th. Lippert, Z. Fodor, Alberto Ramos, T. Hemmert, Kalman K. Szabo, Thorsten Kurth, Antonin Portelli, Stephan Dürr, C. Hoelbling, L. Lellouch
Publikováno v:
Physical Review D. 93
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::eaab10d48873754e7980711f6c4183e7
https://doi.org/10.1103/physrevd.93.039905
https://doi.org/10.1103/physrevd.93.039905
Publikováno v:
Journal of High Energy Physics
QCD topological susceptibility at high temperature, $\chi_t(T)$, provides an important input for the estimate of the axion abundance in the present Universe. While the model independent determination of $\chi_t(T)$ should be possible from the first p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4ecc666033c635440cbd5b7d1047d0ea
Publikováno v:
EPJ Web of Conferences, Vol 175, p 12009 (2018)
In order to better understand the role played by instantons behind nonperturbative dynamics, we investigate the instanton contributions to the gluonic two point correlation functions in the SU(2) YM theory. Pseudoscalar-scalar gluonic correlation fun
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::20fc4eab13b016d0e7e2571c680b244d
https://doi.org/10.1051/epjconf/201817512009
https://doi.org/10.1051/epjconf/201817512009
When several four-quark operators are allowed to mix through renormalisation, this can considerably amplify the problems coming from perturbative truncation and discretisation effects. In this work we investigate whether our previous $B_K$ strategy c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6a721ff4c4223754146a319695fce050