Global Fit of alphas(Mz) to Thrust at NNNLL Order with Power Corrections
From soft-collinear effective theory one can derive a factorization formula for the e+e- thrust distribution dsigma/dtau with tau = 1-T that is applicable for all tau. The formula accommodates available O(alpha_s^3) fixed-order QCD results, resummation of logarithms at NNNLL order, a universal no...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Sissa Medialab
2022
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| Online Access: | https://hdl.handle.net/1721.1/133874.2 |
| _version_ | 1811089700911316992 |
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| author | Abbate, Riccardo Fickinger, Michael Hoang, Andre Mateu, Vicent Stewart, Iain W |
| author2 | Massachusetts Institute of Technology. Center for Theoretical Physics |
| author_facet | Massachusetts Institute of Technology. Center for Theoretical Physics Abbate, Riccardo Fickinger, Michael Hoang, Andre Mateu, Vicent Stewart, Iain W |
| author_sort | Abbate, Riccardo |
| collection | MIT |
| description | From soft-collinear effective theory one can derive a factorization formula
for the e+e- thrust distribution dsigma/dtau with tau = 1-T that is applicable
for all tau. The formula accommodates available O(alpha_s^3) fixed-order QCD
results, resummation of logarithms at NNNLL order, a universal nonperturbative
soft function for hadronization effects, factorization of nonperturbative
effects in subleading power contributions, bottom mass effects and QED
corrections. We emphasize that the use of Monte Carlos to estimate
hadronization effects is not compatible with high-precision, high-order
analyses. We present a global analysis of all available e+e- thrust data
measured at Q = 35 to 207 GeV in the tail region, where a two-parameter fit can
be carried out for alpha_s(m_Z) and Omega_1, the first moment of the soft
function. To obtain small theoretical errors it is essential to define Omega_1
in a short-distance scheme, free of an O(Lambda_QCD) renormalon ambiguity. We
find alpha_s(m_Z) = 0.1135 +- (0.0002)_expt +- (0.0005)_Omega_1 +-
(0.0009)_pert with chi^2/dof = 0.9. |
| first_indexed | 2024-09-23T14:23:19Z |
| format | Article |
| id | mit-1721.1/133874.2 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T14:23:19Z |
| publishDate | 2022 |
| publisher | Sissa Medialab |
| record_format | dspace |
| spelling | mit-1721.1/133874.22022-01-12T20:10:57Z Global Fit of alphas(Mz) to Thrust at NNNLL Order with Power Corrections Abbate, Riccardo Fickinger, Michael Hoang, Andre Mateu, Vicent Stewart, Iain W Massachusetts Institute of Technology. Center for Theoretical Physics From soft-collinear effective theory one can derive a factorization formula for the e+e- thrust distribution dsigma/dtau with tau = 1-T that is applicable for all tau. The formula accommodates available O(alpha_s^3) fixed-order QCD results, resummation of logarithms at NNNLL order, a universal nonperturbative soft function for hadronization effects, factorization of nonperturbative effects in subleading power contributions, bottom mass effects and QED corrections. We emphasize that the use of Monte Carlos to estimate hadronization effects is not compatible with high-precision, high-order analyses. We present a global analysis of all available e+e- thrust data measured at Q = 35 to 207 GeV in the tail region, where a two-parameter fit can be carried out for alpha_s(m_Z) and Omega_1, the first moment of the soft function. To obtain small theoretical errors it is essential to define Omega_1 in a short-distance scheme, free of an O(Lambda_QCD) renormalon ambiguity. We find alpha_s(m_Z) = 0.1135 +- (0.0002)_expt +- (0.0005)_Omega_1 +- (0.0009)_pert with chi^2/dof = 0.9. U.S.Department of Energy, Office of Nuclear Physics (Grant DE-FG02-94ER40818) 2022-01-12T20:10:56Z 2021-10-27T19:57:04Z 2022-01-12T20:10:56Z 2010 2019-04-29T18:54:30Z Article http://purl.org/eprint/type/ConferencePaper https://hdl.handle.net/1721.1/133874.2 en 10.22323/1.092.0040 Proceedings of RADCOR 2009 - 9th International Symposium on Radiative Corrections (Applications of Quantum Field Theory to Phenomenology) — PoS(RADCOR2009) Creative Commons Attribution-Noncommercial-Share Alike http://creativecommons.org/licenses/by-nc-sa/4.0/ application/octet-stream Sissa Medialab Proceedings of Science |
| spellingShingle | Abbate, Riccardo Fickinger, Michael Hoang, Andre Mateu, Vicent Stewart, Iain W Global Fit of alphas(Mz) to Thrust at NNNLL Order with Power Corrections |
| title | Global Fit of alphas(Mz) to Thrust at NNNLL Order with Power Corrections |
| title_full | Global Fit of alphas(Mz) to Thrust at NNNLL Order with Power Corrections |
| title_fullStr | Global Fit of alphas(Mz) to Thrust at NNNLL Order with Power Corrections |
| title_full_unstemmed | Global Fit of alphas(Mz) to Thrust at NNNLL Order with Power Corrections |
| title_short | Global Fit of alphas(Mz) to Thrust at NNNLL Order with Power Corrections |
| title_sort | global fit of alphas mz to thrust at nnnll order with power corrections |
| url | https://hdl.handle.net/1721.1/133874.2 |
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