Precise determination of from the -parameter distribution
Abstract
We present a global fit for αs (mZ), analyzing the available C -parameter data measured at center-of-mass energies between Q = 35 and 207 GeV. The experimental data is compared to a N3 LL' + $$\mathscr{O}$$ (α$$3\atop{s}$$) + Ω1 theoretical prediction (up to the missing four-loop cusp anomalous dimension), which includes power corrections coming from a field-theoretical nonperturbative soft function. The dominant hadronic parameter is its first moment Ω1, which is defined in a scheme which eliminates the $$\mathscr{O}$$ (ΛQCD) renormalon ambiguity. The resummation region plays a dominant role in the C -parameter spectrum, and in this region a fit for αs (mZ) and Ω1 is sufficient. We find αs (mZ) = 0.1123 ± 0.0015 and Ω1 = 0.421 ± 0.063 GeV with χ2/d . o . f . = 0.988 for 404 bins of data. These results agree with the prediction of universality for Ω1 between thrust and C -parameter within 1- σ .
- Authors:
-
- Univ. of Vienna (Austria). Faculty of Physics, and Erwin Schrödinger International Inst. for Mathematical Physics
- Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Center for Theoretical Physics
- Univ. of Vienna (Austria). Faculty of Physics
- Publication Date:
- Research Org.:
- Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1505753
- Alternate Identifier(s):
- OSTI ID: 1179766
- Grant/Contract Number:
- SC0011090
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review. D, Particles, Fields, Gravitation and Cosmology
- Additional Journal Information:
- Journal Volume: 91; Journal Issue: 9; Journal ID: ISSN 1550-7998
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Citation Formats
Hoang, André H., Kolodrubetz, Daniel W., Mateu, Vicent, and Stewart, Iain W. Precise determination of αs from the C -parameter distribution. United States: N. p., 2015.
Web. doi:10.1103/physrevd.91.094018.
Hoang, André H., Kolodrubetz, Daniel W., Mateu, Vicent, & Stewart, Iain W. Precise determination of αs from the C -parameter distribution. United States. https://doi.org/10.1103/physrevd.91.094018
Hoang, André H., Kolodrubetz, Daniel W., Mateu, Vicent, and Stewart, Iain W. Fri .
"Precise determination of αs from the C -parameter distribution". United States. https://doi.org/10.1103/physrevd.91.094018. https://www.osti.gov/servlets/purl/1505753.
@article{osti_1505753,
title = {Precise determination of αs from the C -parameter distribution},
author = {Hoang, André H. and Kolodrubetz, Daniel W. and Mateu, Vicent and Stewart, Iain W.},
abstractNote = {We present a global fit for αs (mZ), analyzing the available C -parameter data measured at center-of-mass energies between Q = 35 and 207 GeV. The experimental data is compared to a N3 LL' + $\mathscr{O}$ (α$3\atop{s}$) + Ω1 theoretical prediction (up to the missing four-loop cusp anomalous dimension), which includes power corrections coming from a field-theoretical nonperturbative soft function. The dominant hadronic parameter is its first moment Ω1, which is defined in a scheme which eliminates the $\mathscr{O}$ (ΛQCD) renormalon ambiguity. The resummation region plays a dominant role in the C -parameter spectrum, and in this region a fit for αs (mZ) and Ω1 is sufficient. We find αs (mZ) = 0.1123 ± 0.0015 and Ω1 = 0.421 ± 0.063 GeV with χ2/d . o . f . = 0.988 for 404 bins of data. These results agree with the prediction of universality for Ω1 between thrust and C -parameter within 1- σ .},
doi = {10.1103/physrevd.91.094018},
journal = {Physical Review. D, Particles, Fields, Gravitation and Cosmology},
number = 9,
volume = 91,
place = {United States},
year = {Fri May 15 00:00:00 EDT 2015},
month = {Fri May 15 00:00:00 EDT 2015}
}
Web of Science
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