Tau-decay determination of the strong coupling

Pich, Antonio

doi:10.21468/SciPostPhysProc.1.036

SciPost Physics Proceedings

Tau-decay determination of the strong coupling

Antonio Pich

SciPost Phys. Proc. 1, 036 (2019) · published 21 February 2019

doi: 10.21468/SciPostPhysProc.1.036
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The 15th International Workshop on Tau Lepton Physics

Abstract

We review the current status of the determination of the strong coupling from tau decay. Using the most recent release of the ALEPH data, a very comprehensive phenomenological analysis has been performed, exploring all strategies previously considered in the literature and several complementary approaches. Once their actual uncertainties are properly assessed, the results from all adopted methodologies are in excellent agreement, leading to a very robust and reliable value of the strong coupling, $\alpha_s^{(n_f=3)}(m_\tau^2) = 0.328\pm 0.013$, which implies $\alpha_s^{(n_f=5)}(M_Z^2) = 0.1197\pm 0.0015$.

TY  - JOUR
PB  - SciPost Foundation
DO  - 10.21468/SciPostPhysProc.1.036
TI  - Tau-decay determination of the strong coupling
PY  - 2019/02/21
UR  - https://www.scipost.org/SciPostPhysProc.1.036
JF  - SciPost Physics Proceedings
JA  - SciPost Phys. Proc.
VL  - 
IS  - 1
SP  - 036
A1  - Pich, Antonio
AB  - We review the current status of the determination of the strong coupling from tau decay. Using the most recent release of the ALEPH data, a very comprehensive phenomenological analysis has been performed, exploring all strategies previously considered in the literature and several complementary approaches. Once their actual uncertainties are properly assessed, the results from all adopted methodologies are in excellent agreement, leading to a very robust and reliable value of the strong coupling, $\alpha_s^{(n_f=3)}(m_\tau^2) = 0.328\pm 0.013$, which implies $\alpha_s^{(n_f=5)}(M_Z^2) = 0.1197\pm 0.0015$.
ER  -

@Article{10.21468/SciPostPhysProc.1.036,
	title={{Tau-decay determination of the strong coupling}},
	author={Antonio Pich},
	journal={SciPost Phys. Proc.},
	pages={036},
	year={2019},
	publisher={SciPost},
	doi={10.21468/SciPostPhysProc.1.036},
	url={https://scipost.org/10.21468/SciPostPhysProc.1.036},
}

Cited by 3

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¹ Antonio Pich

¹ Universitat de València / University of Valencia [UV]

Funders for the research work leading to this publication

European Regional Development Fund [ERDF]
Generalitat Valenciana
Ministerio de Economía y Competitividad (MINECO) (through Organization: Ministerio de Economía, Industria y Competitividad / Ministry of Economy, Industry and Competitiveness [MINECO])