Effective field theory approach to heavy quark fragmentation
Using an approach based on Soft Collinear Effective Theory (SCET) and Heavy Quark Effective Theory (HQET) we determine the bquark fragmentation function from electronpositron annihilation data at the Zboson peak at nexttonextto leading order with nexttonextto leading log resummation of DGLAP logarithms, and nexttonexttonextto leading log resummation of endpoint logarithms. This analysis improves, by one order, the previous extraction of the bquark fragmentation function. We find that while the addition of the next order in the calculation does not much shift the extracted form of the fragmentation function, it does reduce theoretical errors indicating that the expansion is converging. Using an approach based on effective field theory allows us to systematically control theoretical errors. Furthermore, while the fits of theory to data are generally good, the fits seem to be hinting that higher order correction from HQET may be needed to explain the bquark fragmentation function at smaller values of momentum fraction.
 Authors:

^{[1]};
^{[2]};
^{[3]};
^{[4]}
 Johannes Gutenberg Univ., Mainz (Germany)
 Univ. of Arizona, Tucson, AZ (United States)
 Seoul National Univ. of Science and Technology, Seoul (Korea)
 Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
 Publication Date:
 Report Number(s):
 LAUR1624386
Journal ID: ISSN 10298479; TRN: US1701241
 Grant/Contract Number:
 AC5206NA25396
 Type:
 Accepted Manuscript
 Journal Name:
 Journal of High Energy Physics (Online)
 Additional Journal Information:
 Journal Name: Journal of High Energy Physics (Online); Journal Volume: 2016; Journal Issue: 11; Journal ID: ISSN 10298479
 Publisher:
 Springer Berlin
 Research Org:
 Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
 Sponsoring Org:
 USDOE
 Country of Publication:
 United States
 Language:
 English
 Subject:
 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Atomic and Nuclear Physics
 OSTI Identifier:
 1343710
Fickinger, Michael, Fleming, Sean, Kim, Chul, and Mereghetti, Emanuele. Effective field theory approach to heavy quark fragmentation. United States: N. p.,
Web. doi:10.1007/JHEP11(2016)095.
Fickinger, Michael, Fleming, Sean, Kim, Chul, & Mereghetti, Emanuele. Effective field theory approach to heavy quark fragmentation. United States. doi:10.1007/JHEP11(2016)095.
Fickinger, Michael, Fleming, Sean, Kim, Chul, and Mereghetti, Emanuele. 2016.
"Effective field theory approach to heavy quark fragmentation". United States.
doi:10.1007/JHEP11(2016)095. https://www.osti.gov/servlets/purl/1343710.
@article{osti_1343710,
title = {Effective field theory approach to heavy quark fragmentation},
author = {Fickinger, Michael and Fleming, Sean and Kim, Chul and Mereghetti, Emanuele},
abstractNote = {Using an approach based on Soft Collinear Effective Theory (SCET) and Heavy Quark Effective Theory (HQET) we determine the bquark fragmentation function from electronpositron annihilation data at the Zboson peak at nexttonextto leading order with nexttonextto leading log resummation of DGLAP logarithms, and nexttonexttonextto leading log resummation of endpoint logarithms. This analysis improves, by one order, the previous extraction of the bquark fragmentation function. We find that while the addition of the next order in the calculation does not much shift the extracted form of the fragmentation function, it does reduce theoretical errors indicating that the expansion is converging. Using an approach based on effective field theory allows us to systematically control theoretical errors. Furthermore, while the fits of theory to data are generally good, the fits seem to be hinting that higher order correction from HQET may be needed to explain the bquark fragmentation function at smaller values of momentum fraction.},
doi = {10.1007/JHEP11(2016)095},
journal = {Journal of High Energy Physics (Online)},
number = 11,
volume = 2016,
place = {United States},
year = {2016},
month = {11}
}