Zobrazeno 1 - 10
of 47
pro vyhledávání: '"Hiromasa Takaura"'
Autor:
Hiromasa Takaura
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 10, Pp 1-26 (2024)
Abstract We present a method to extract the low energy behavior of physical observables from their high energy expansions, systematically calculable via the operator product expansion (OPE), in asymptotically free and mass-gapped theories. By applyin
Externí odkaz:
https://doaj.org/article/561010fc22244a95b3145c6fcbe2a428
Publikováno v:
Journal of High Energy Physics, Vol 2022, Iss 2, Pp 1-63 (2022)
Abstract Properly separating and subtracting renormalons in the framework of the op- erator product expansion (OPE) is a way to realize high precision computation of QCD effects in high energy physics. We propose a new method (FTRS method), which ena
Externí odkaz:
https://doaj.org/article/ab08c8f4fb624421bf14183538c35fbe
Publikováno v:
Physics Letters B, Vol 829, Iss , Pp 137068- (2022)
We determine |Vcb| using the third-order perturbative series for the inclusive semileptonic B decay width and for the masses of the bottomonium 1S states. We use the masses of ηb(1S) and ϒ(1S) as short-distance masses and point out that there is a
Externí odkaz:
https://doaj.org/article/11fdce1d94454bc8b7ba506bedf66d7a
Publikováno v:
Journal of High Energy Physics, Vol 2021, Iss 5, Pp 1-29 (2021)
Abstract We perform a numerical computation of the anomalous magnetic moment (g − 2) of the electron in QED by using the stochastic perturbation theory. Formulating QED on the lattice, we develop a method to calculate the coefficients of the pertur
Externí odkaz:
https://doaj.org/article/1897d4c8f31f4469885deb646b12225b
Autor:
Hiromasa Takaura
Publikováno v:
Journal of High Energy Physics, Vol 2020, Iss 10, Pp 1-44 (2020)
Abstract We present a formulation to give renormalon-free predictions consistently with fixed order perturbative results. The formulation has a similarity to Lee’s method in that the renormalon-free part consists of two parts: one is given by a ser
Externí odkaz:
https://doaj.org/article/3a69c55adbf04fec94f663a3efeb8f3f
Autor:
Yukinari Sumino, Hiromasa Takaura
Publikováno v:
Journal of High Energy Physics, Vol 2020, Iss 5, Pp 1-32 (2020)
Abstract We investigate the u = 1 / 2 O Λ QCD $$ u=1/2\left[\mathcal{O}\left({\Lambda}_{\mathrm{QCD}}\right)\right] $$ and u = 3 / 2 O Λ QCD 3 $$ u=3/2\left[\mathcal{O}\left({\Lambda}_{\mathrm{QCD}}^3\right)\right] $$ renormalons in the static QCD
Externí odkaz:
https://doaj.org/article/03c0a4cbafe14790bbdc9c82212044a4
Publikováno v:
Journal of High Energy Physics, Vol 2019, Iss 4, Pp 1-41 (2019)
Abstract We determine the strong coupling constant α s from the static QCD potential by matching a theoretical calculation with a lattice QCD computation. We employ a new theoretical formulation based on the operator product expansion, in which reno
Externí odkaz:
https://doaj.org/article/abae7414a5ca40af8703bbde6e0fcf5f
Autor:
Okuto Morikawa, Hiromasa Takaura
Publikováno v:
Physics Letters B, Vol 807, Iss , Pp 135570- (2020)
It was conjectured that bions, semi-classical objects found in a compactified spacetime, are responsible for the cancellation of the so-called renormalon ambiguities. Contrary to the conjecture, we argue that the ambiguity due to the bion corresponds
Externí odkaz:
https://doaj.org/article/b8bd8cd565984ad4b88bdca083207b37
Publikováno v:
Progress of Theoretical and Experimental Physics. 2023
The expected measurement precisions of elastic scattering cross sections are estimated for μ+μ+ and μ+e− colliders, which have recently been proposed as future realistic possibilities (μTRISTAN). Compared with contributions from possible new ph
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f24c4b69d7c415fa20cc0755736e7961
https://doi.org/10.1093/ptep/ptac174
https://doi.org/10.1093/ptep/ptac174
Autor:
Hiromasa Takaura
Publikováno v:
The European Physical Journal Special Topics. 230:2593-2600
We give a brief review of the current understanding of renormalons of the static QCD potential in coordinate and momentum spaces. We also reconsider estimate of the normalization constant of the $u=3/2$ renormalon and propose a new way to improve the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6b1154d8e753f0e3b19cdaf54c738d1f
https://doi.org/10.1140/epjs/s11734-021-00253-3
https://doi.org/10.1140/epjs/s11734-021-00253-3