The soft drop momentum sharing fraction z beyond leading-logarithmic accuracy
Abstract
Grooming techniques, such as soft drop, play a central role in reducing sensitivity of jets to e.g. underlying event and hadronization at current collider experiments. The momentum sharing fraction zg, of the two branches in a jet that pass the soft drop condition, is one of the most important observables characterizing a collinear splitting inside the jet, and directly probes the QCD splitting functions. In this work, we present a factorization framework that enables a systematic calculation of the corresponding cross section beyond modified leading-logarithmic (MLL) accuracy, showing that this measurement is not only sensitive to the QCD charge but also the spin of the parton that initiates the jet. Our results at next-to-leading logarithmic (NLL') accuracy include non-global logarithms, and provide a first meaningful assessment of the perturbative uncertainty. We present a comparison to the available experimental data from ALICE, ATLAS, and STAR and find excellent agreement.
- Authors:
- Publication Date:
- Research Org.:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Nuclear Physics (NP)
- OSTI Identifier:
- 1885206
- Alternate Identifier(s):
- OSTI ID: 1994351
- Grant/Contract Number:
- AC02-05CH11231; ERC-STG-2015-677323
- Resource Type:
- Published Article
- Journal Name:
- Physics Letters B
- Additional Journal Information:
- Journal Name: Physics Letters B Journal Volume: 833 Journal Issue: C; Journal ID: ISSN 0370-2693
- Publisher:
- Elsevier
- Country of Publication:
- Netherlands
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Citation Formats
Cal, Pedro, Lee, Kyle, Ringer, Felix, and Waalewijn, Wouter J. The soft drop momentum sharing fraction z beyond leading-logarithmic accuracy. Netherlands: N. p., 2022.
Web. doi:10.1016/j.physletb.2022.137390.
Cal, Pedro, Lee, Kyle, Ringer, Felix, & Waalewijn, Wouter J. The soft drop momentum sharing fraction z beyond leading-logarithmic accuracy. Netherlands. https://doi.org/10.1016/j.physletb.2022.137390
Cal, Pedro, Lee, Kyle, Ringer, Felix, and Waalewijn, Wouter J. Sat .
"The soft drop momentum sharing fraction z beyond leading-logarithmic accuracy". Netherlands. https://doi.org/10.1016/j.physletb.2022.137390.
@article{osti_1885206,
title = {The soft drop momentum sharing fraction z beyond leading-logarithmic accuracy},
author = {Cal, Pedro and Lee, Kyle and Ringer, Felix and Waalewijn, Wouter J.},
abstractNote = {Grooming techniques, such as soft drop, play a central role in reducing sensitivity of jets to e.g. underlying event and hadronization at current collider experiments. The momentum sharing fraction zg, of the two branches in a jet that pass the soft drop condition, is one of the most important observables characterizing a collinear splitting inside the jet, and directly probes the QCD splitting functions. In this work, we present a factorization framework that enables a systematic calculation of the corresponding cross section beyond modified leading-logarithmic (MLL) accuracy, showing that this measurement is not only sensitive to the QCD charge but also the spin of the parton that initiates the jet. Our results at next-to-leading logarithmic (NLL') accuracy include non-global logarithms, and provide a first meaningful assessment of the perturbative uncertainty. We present a comparison to the available experimental data from ALICE, ATLAS, and STAR and find excellent agreement.},
doi = {10.1016/j.physletb.2022.137390},
journal = {Physics Letters B},
number = C,
volume = 833,
place = {Netherlands},
year = {Sat Oct 01 00:00:00 EDT 2022},
month = {Sat Oct 01 00:00:00 EDT 2022}
}
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