Fragmentation functions beyond fixed order accuracy
Abstract
Here, we give a detailed account of the phenomenology of all-order resummations of logarithmically enhanced contributions at small momentum fraction of the observed hadron in semi-inclusive electron-positron annihilation and the timelike scale evolution of parton-to-hadron fragmentation functions. The formalism to perform resummations in Mellin moment space is briefly reviewed, and all relevant expressions up to next-to-next-to-leading logarithmic order are derived, including their explicit dependence on the factorization and renormalization scales. We discuss the details pertinent to a proper numerical implementation of the resummed results comprising an iterative solution to the timelike evolution equations, the matching to known fixed-order expressions, and the choice of the contour in the Mellin inverse transformation. First extractions of parton-to-pion fragmentation functions from semi-inclusive annihilation data are performed at different logarithmic orders of the resummations in order to estimate their phenomenological relevance. To this end, we compare our results to corresponding fits up to fixed, next-to-next-to-leading order accuracy and study the residual dependence on the factorization scale in each case.
- Authors:
-
- The Univ. of Manchester, Manchester (United Kingdom)
- Univ. of Tubingen, Tubingen (Germany)
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Publication Date:
- Research Org.:
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1460626
- Alternate Identifier(s):
- OSTI ID: 1345854
- Report Number(s):
- LA-UR-16-27763
Journal ID: ISSN 2470-0010; PRVDAQ; TRN: US1901881
- Grant/Contract Number:
- AC52-06NA25396; 2012LANL7033
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review D
- Additional Journal Information:
- Journal Volume: 95; Journal Issue: 5; Journal ID: ISSN 2470-0010
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 74 ATOMIC AND MOLECULAR PHYSICS; Atomic and Nuclear Physics
Citation Formats
Anderle, Daniele P., Kaufmann, Tom, Stratmann, Marco, and Ringer, Felix. Fragmentation functions beyond fixed order accuracy. United States: N. p., 2017.
Web. doi:10.1103/PhysRevD.95.054003.
Anderle, Daniele P., Kaufmann, Tom, Stratmann, Marco, & Ringer, Felix. Fragmentation functions beyond fixed order accuracy. United States. https://doi.org/10.1103/PhysRevD.95.054003
Anderle, Daniele P., Kaufmann, Tom, Stratmann, Marco, and Ringer, Felix. Mon .
"Fragmentation functions beyond fixed order accuracy". United States. https://doi.org/10.1103/PhysRevD.95.054003. https://www.osti.gov/servlets/purl/1460626.
@article{osti_1460626,
title = {Fragmentation functions beyond fixed order accuracy},
author = {Anderle, Daniele P. and Kaufmann, Tom and Stratmann, Marco and Ringer, Felix},
abstractNote = {Here, we give a detailed account of the phenomenology of all-order resummations of logarithmically enhanced contributions at small momentum fraction of the observed hadron in semi-inclusive electron-positron annihilation and the timelike scale evolution of parton-to-hadron fragmentation functions. The formalism to perform resummations in Mellin moment space is briefly reviewed, and all relevant expressions up to next-to-next-to-leading logarithmic order are derived, including their explicit dependence on the factorization and renormalization scales. We discuss the details pertinent to a proper numerical implementation of the resummed results comprising an iterative solution to the timelike evolution equations, the matching to known fixed-order expressions, and the choice of the contour in the Mellin inverse transformation. First extractions of parton-to-pion fragmentation functions from semi-inclusive annihilation data are performed at different logarithmic orders of the resummations in order to estimate their phenomenological relevance. To this end, we compare our results to corresponding fits up to fixed, next-to-next-to-leading order accuracy and study the residual dependence on the factorization scale in each case.},
doi = {10.1103/PhysRevD.95.054003},
journal = {Physical Review D},
number = 5,
volume = 95,
place = {United States},
year = {Mon Mar 06 00:00:00 EST 2017},
month = {Mon Mar 06 00:00:00 EST 2017}
}
Web of Science
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