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Observation of Enhanced Long-Range Elliptic Anisotropies Inside High-Multiplicity Jets in pp Collisions at √s = 13 TeV

CMS Collaboration; Hayrapetyan, A.; Tumasyan, A.; Adam, W.; Andrejkovic, J. W.; Bergauer, T.; Chatterjee, S.; Damanakis, K.; Dragicevic, M.; Hussain, P. S.; Jeitler, M.; Krammer, N.; Li, A.; Liko, D.; Mikulec, I.; Schieck, J.; Schöfbeck, R.; Schwarz, D.; Sonawane, M.; ... mehr

Abstract:

A search for collective effects inside jets produced in proton-proton collisions is performed via correlation measurements of charged particles using the CMS detector at the CERN LHC. The analysis uses data collected at a center-of-mass energy of √𝑠=13  TeV, corresponding to an integrated luminosity of 138  fb−1. Jets are reconstructed with the anti-𝑘T algorithm with a distance parameter of 0.8 and are required to have transverse momentum greater than 550 GeV and pseudorapidity |𝜂jet|<1.6. Two-particle correlations among the charged particles within the jets are studied as functions of the particles’ azimuthal angle and pseudorapidity separations (Δ⁢𝜙* and Δ⁢𝜂*) in a jet coordinate basis, where particles’ 𝜂*, 𝜙* are defined relative to the direction of the jet. The correlation functions are studied in classes of in-jet charged-particle multiplicity up to 𝑁j
ch≈100. Fourier harmonics are extracted from long-range azimuthal correlation functions to characterize azimuthal anisotropy for |Δ⁢𝜂*|>2. For low-𝑁j
ch jets, the long-range elliptic anisotropic harmonic, 𝑣*
2, is observed to decrease with 𝑁j
ch. This trend is well described by Monte Carlo event generators. ... mehr

Zugehörige Institution(en) am KIT Institut für Astroteilchenphysik (IAP)
Institut für Experimentelle Teilchenphysik (ETP)
Institut für Prozessdatenverarbeitung und Elektronik (IPE)
Scientific Computing Center (SCC)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 09.2024
Sprache Englisch
Identifikator ISSN: 0031-9007, 1079-7114
KITopen-ID: 1000176265
HGF-Programm 51.11.01 (POF IV, LK 01) Teilchenphysik
Erschienen in Physical Review Letters
Verlag American Physical Society (APS)
Band 133
Heft 14
Seiten Art.-Nr.: 142301
Bemerkung zur Veröffentlichung Gefördert durch SCOAP3
Nachgewiesen in Dimensions
arXiv
OpenAlex
Scopus

Verlagsausgabe §
DOI: 10.5445/IR/1000176265
Veröffentlicht am 14.11.2024
Originalveröffentlichung
DOI: 10.1103/PhysRevLett.133.142301
Scopus
Zitationen: 1
Dimensions
Zitationen: 3
Seitenaufrufe: 36
seit 14.11.2024
Downloads: 11
seit 21.11.2024
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