Inclusive J/ψ and ηc production in ϒ decay at O(αs5) in nonrelativistic QCD factorization
Abstract
Here, we study and inclusive production in decay within the framework of nonrelativistic-QCD (NRQCD) factorization. In the latter case, for which no experimental data exist so far, we also include the feed-down contribution. We calculate the short-distance coefficients completely through . The NRQCD predictions for the branching fraction via direct production, evaluated with different sets of long-distance matrix elements (LDMEs), all agree with the experimental data in a reasonable range of renormalization scale. Using and LDMEs obtained from and ones via heavy-quark spin symmetry, we find that the bulk of via prompt production arises from the Fock state. The experimental study of this decay process would, therefore, provide a particularly clean probe of the color octet mechanism of heavy-quarkonium production.
- Authors:
- Publication Date:
- Research Org.:
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), High Energy Physics (HEP); German Federal Ministry of Education and Research (BMBF); German Research Foundation (DFG); Chinese Scholarship Council
- OSTI Identifier:
- 1608074
- Alternate Identifier(s):
- OSTI ID: 1756089
- Grant/Contract Number:
- AC02-06CH11357; 05H15GUCC1; KN-365/12-1; CSC-201404910576
- Resource Type:
- Published Article
- Journal Name:
- Physical Review. D.
- Additional Journal Information:
- Journal Name: Physical Review. D. Journal Volume: 101 Journal Issue: 7; Journal ID: ISSN 2470-0010
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; nonrelativistic QCD; quantum chromodynamics
Citation Formats
He, Zhi-Guo, Kniehl, Bernd A., and Wang, Xiang-Peng. Inclusive J/ψ and ηc production in ϒ decay at O(αs5) in nonrelativistic QCD factorization. United States: N. p., 2020.
Web. doi:10.1103/physrevd.101.074002.
He, Zhi-Guo, Kniehl, Bernd A., & Wang, Xiang-Peng. Inclusive J/ψ and ηc production in ϒ decay at O(αs5) in nonrelativistic QCD factorization. United States. https://doi.org/10.1103/physrevd.101.074002
He, Zhi-Guo, Kniehl, Bernd A., and Wang, Xiang-Peng. Thu .
"Inclusive J/ψ and ηc production in ϒ decay at O(αs5) in nonrelativistic QCD factorization". United States. https://doi.org/10.1103/physrevd.101.074002.
@article{osti_1608074,
title = {Inclusive J/ψ and ηc production in ϒ decay at O(αs5) in nonrelativistic QCD factorization},
author = {He, Zhi-Guo and Kniehl, Bernd A. and Wang, Xiang-Peng},
abstractNote = {Here, we study J/ψ and ηc inclusive production in Υ decay within the framework of nonrelativistic-QCD (NRQCD) factorization. In the latter case, for which no experimental data exist so far, we also include the hc feed-down contribution. We calculate the short-distance coefficients completely through O(αs5). The NRQCD predictions for the branching fraction B(Υ→J/ψ+X) via direct production, evaluated with different sets of long-distance matrix elements (LDMEs), all agree with the experimental data in a reasonable range of renormalization scale. Using ηc and hc LDMEs obtained from J/ψ and χc ones via heavy-quark spin symmetry, we find that the bulk of B(Υ→ηc+X) via prompt production arises from the cc¯(S31[8]) Fock state. The experimental study of this decay process would, therefore, provide a particularly clean probe of the color octet mechanism of heavy-quarkonium production.},
doi = {10.1103/physrevd.101.074002},
journal = {Physical Review. D.},
number = 7,
volume = 101,
place = {United States},
year = {Thu Apr 02 00:00:00 EDT 2020},
month = {Thu Apr 02 00:00:00 EDT 2020}
}
https://doi.org/10.1103/physrevd.101.074002
Web of Science
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