Measurements of Groomed-Jet Substructure of Charm Jets Tagged by D.sup.0./sup. Mesons in Proton-Proton Collisions at √s=13 TeV

Acharya, S.; Adamová, Dagmar; Adler, A.; Aglieri Rinella, G.; Bielčík, J.; Bielčíková, Jana; Broz, M.; Contreras, J. G.; Filová, V.; Grecká, Ekaterina; Grund, D.; Herman, T.; Isakov, Artem; Kotliarov, Artem; Krupová, D. M.; Křížek, Filip; Křížková Gajdošová, K.; Kushpil, Svetlana; Petráček, V.; Šafařík, K.; Torres, S. R.; Závada, Petr

doi:https://dx.doi.org/10.1103/PhysRevLett.131.192301

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Measurements of Groomed-Jet Substructure of Charm Jets Tagged by D.sup.0./sup. Mesons in Proton-Proton Collisions at √s=13 TeV

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SYSNO ASEP	0582696
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Measurements of Groomed-Jet Substructure of Charm Jets Tagged by D⁰ Mesons in Proton-Proton Collisions at √s=13 TeV
Author(s)	Acharya, S. (IN) Adamová, Dagmar (UJF-V)_{RID, ORCID, SAI} Adler, A. (DE) Aglieri Rinella, G. (CH) Bielčík, J. (CZ) Bielčíková, Jana (UJF-V)_{RID, ORCID, SAI} Broz, M. (CZ) Contreras, J. G. (CZ) Filová, V. (CZ) Grecká, Ekaterina (UJF-V)_ORCID Grund, D. (CZ) Herman, T. (CZ) Isakov, Artem (UJF-V)_{ORCID, SAI} Kotliarov, Artem (UJF-V)_{ORCID, SAI} Krupová, D. M. (CZ) Křížek, Filip (UJF-V)_{RID, ORCID, SAI} Křížková Gajdošová, K. (CZ) Kushpil, Svetlana (UJF-V)_{RID, ORCID, SAI} Petráček, V. (CZ) Šafařík, K. (CZ) Torres, S. R. (CZ) Závada, Petr (FZU-D)_{RID, ORCID}
Number of authors	1037
Article number	192301
Source Title	Physical Review Letters. - : American Physical Society - ISSN 0031-9007 Roč. 131, č. 19 (2023)
Number of pages	13 s.
Publication form	Print - P
Language	eng - English
Country	US - United States
Keywords	ALICE collaboration ; heavy ion collision
OECD category	Nuclear physics
Research Infrastructure	CERN-CZ III - 90240 - Fyzikální ústav AV ČR, v. v. i.
Method of publishing	Open access
Institutional support	FZU-D - RVO:68378271 ; UJF-V - RVO:61389005
UT WOS	001117691500008
EID SCOPUS	85177792817
DOI	10.1103/PhysRevLett.131.192301
Annotation	Understanding the role of parton mass and Casimir color factors in the quantum chromodynamics parton shower represents an important step in characterizing the emission properties of heavy quarks. Recent experimental advances in jet substructure techniques have provided the opportunity to isolate and characterize gluon emissions from heavy quarks. In this Letter, the first direct experimental constraint on the charm-quark splitting function is presented, obtained via the measurement of the groomed shared momentum fraction of the first splitting in charm jets, tagged by a reconstructed D0 meson. The measurement is made in proton-proton collisions at √s=13 TeV, in the low jet transverse-momentum interval of 15≤p jet ch T<30 GeV/c where the emission properties are sensitive to parton mass effects. In addition, the opening angle of the first perturbative emission of the charm quark, as well as the number of perturbative emissions it undergoes, is reported. Comparisons to measurements of an inclusive-jet sample show a steeper splitting function for charm quarks compared with gluons and light quarks. Charm quarks also undergo fewer perturbative emissions in the parton shower, with a reduced probability of large-angle emissions.
Workplace	Nuclear Physics Institute
Contact	Markéta Sommerová, sommerova@ujf.cas.cz, Tel.: 266 173 228
Year of Publishing	2024
Electronic address	https://doi.org/10.1103/PhysRevLett.131.192301

Number of the records: 1