Thrust distribution for 3-jet production from e+e− annihilation within the QCD conformal window and in QED

We investigate the theoretical predictions for thrust distribution in the electron positron annihilation to three-jets process at NNLO for different values of the number of flavors, Nf. To determine the distribution along the entire renormalization group flow from the highest energies to zero energy...

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Autores principales:	Leonardo Di Giustino, Francesco Sannino, Sheng-Quan Wang, Xing-Gang Wu
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Physics QC1-999
Acceso en línea:	https://doaj.org/article/468d36edb6db4c6f97aed416cf7b86de
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spelling	oai:doaj.org-article:468d36edb6db4c6f97aed416cf7b86de2021-12-04T04:32:27ZThrust distribution for 3-jet production from e+e− annihilation within the QCD conformal window and in QED0370-269310.1016/j.physletb.2021.136728https://doaj.org/article/468d36edb6db4c6f97aed416cf7b86de2021-12-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S0370269321006687https://doaj.org/toc/0370-2693We investigate the theoretical predictions for thrust distribution in the electron positron annihilation to three-jets process at NNLO for different values of the number of flavors, Nf. To determine the distribution along the entire renormalization group flow from the highest energies to zero energy we consider the number of flavors near the upper boundary of the conformal window. In this regime of number of flavors the theory develops a perturbative infrared interacting fixed point. We then consider also the QED thrust obtained as the limit Nc→0 of the number of colors. In this case the low energy limit is governed by an infrared free theory. Using these quantum field theories limits as theoretical laboratories we arrive at an interesting comparison between the Conventional Scale Setting - (CSS) and the Principle of Maximum Conformality (PMC∞) methods. We show that within the perturbative regime of the conformal window and also out of the conformal window the PMC∞ leads to a higher precision, and that reducing the number of flavors, from the upper boundary to the lower boundary, through the phase transition the curves given by the PMC∞ method preserve with continuity the position of the peak, showing perfect agreement with the experimental data already at NNLO.Leonardo Di GiustinoFrancesco SanninoSheng-Quan WangXing-Gang WuElsevierarticlePhysicsQC1-999ENPhysics Letters B, Vol 823, Iss , Pp 136728- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Physics QC1-999
spellingShingle	Physics QC1-999 Leonardo Di Giustino Francesco Sannino Sheng-Quan Wang Xing-Gang Wu Thrust distribution for 3-jet production from e+e− annihilation within the QCD conformal window and in QED
description	We investigate the theoretical predictions for thrust distribution in the electron positron annihilation to three-jets process at NNLO for different values of the number of flavors, Nf. To determine the distribution along the entire renormalization group flow from the highest energies to zero energy we consider the number of flavors near the upper boundary of the conformal window. In this regime of number of flavors the theory develops a perturbative infrared interacting fixed point. We then consider also the QED thrust obtained as the limit Nc→0 of the number of colors. In this case the low energy limit is governed by an infrared free theory. Using these quantum field theories limits as theoretical laboratories we arrive at an interesting comparison between the Conventional Scale Setting - (CSS) and the Principle of Maximum Conformality (PMC∞) methods. We show that within the perturbative regime of the conformal window and also out of the conformal window the PMC∞ leads to a higher precision, and that reducing the number of flavors, from the upper boundary to the lower boundary, through the phase transition the curves given by the PMC∞ method preserve with continuity the position of the peak, showing perfect agreement with the experimental data already at NNLO.
format	article
author	Leonardo Di Giustino Francesco Sannino Sheng-Quan Wang Xing-Gang Wu
author_facet	Leonardo Di Giustino Francesco Sannino Sheng-Quan Wang Xing-Gang Wu
author_sort	Leonardo Di Giustino
title	Thrust distribution for 3-jet production from e+e− annihilation within the QCD conformal window and in QED
title_short	Thrust distribution for 3-jet production from e+e− annihilation within the QCD conformal window and in QED
title_full	Thrust distribution for 3-jet production from e+e− annihilation within the QCD conformal window and in QED
title_fullStr	Thrust distribution for 3-jet production from e+e− annihilation within the QCD conformal window and in QED
title_full_unstemmed	Thrust distribution for 3-jet production from e+e− annihilation within the QCD conformal window and in QED
title_sort	thrust distribution for 3-jet production from e+e− annihilation within the qcd conformal window and in qed
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/468d36edb6db4c6f97aed416cf7b86de
work_keys_str_mv	AT leonardodigiustino thrustdistributionfor3jetproductionfromeeannihilationwithintheqcdconformalwindowandinqed AT francescosannino thrustdistributionfor3jetproductionfromeeannihilationwithintheqcdconformalwindowandinqed AT shengquanwang thrustdistributionfor3jetproductionfromeeannihilationwithintheqcdconformalwindowandinqed AT xinggangwu thrustdistributionfor3jetproductionfromeeannihilationwithintheqcdconformalwindowandinqed
_version_	1718373027028140032

Thrust distribution for 3-jet production from e+e− annihilation within the QCD conformal window and in QED

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