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Search for jet quenching with dijets from high-multiplicity pPb collisions at $\sqrt{{s}_{\text{NN}}}$ = 8.16 TeV

CMS Collaboration; Chekhovsky, V. ; Hayrapetyan, A.; Makarenko, V.; Tumasyan, A.; Adam, W.; Andrejkovic, J. W.; Benato, L.; Bergauer, T.; Damanakis, K.; Dragicevic, M.; Giordano, C.; Hussain, P. S.; Jeitler, M.; Krammer, N.; Li, A.; Liko, D.; Mikulec, I.; Schieck, J.; ... mehr

Abstract:

The first measurement of the dijet transverse momentum balance x(j) in proton-lead (pPb) collisions at a nucleon-nucleon center-of-mass energy of root s(NN) = 8.16 TeV is presented. The x(j) observable, defined as the ratio of the subleading over leading jet transverse momentum in a dijet pair, is used to search for jet quenching effects. The data, corresponding to an integrated luminosity of 174.6 nb(-1), were collected with the CMS detector in 2016. The x(j) distributions and their average values are studied as functions of the charged-particle multiplicity of the events and for various dijet rapidity selections. The latter enables probing hard scattering of partons carrying distinct nucleon momentum fractions x in the proton- and lead-going directions. The former, aided by the high-multiplicity triggers, allows probing for potential jet quenching effects in high-multiplicity events (with up to 400 charged particles), for which collective phenomena consistent with quark-gluon plasma (QGP) droplet formation were previously observed. The ratios of x(j) distributions for high- to low-multiplicity events are used to quantify the possible medium effects. ... mehr


Verlagsausgabe §
DOI: 10.5445/IR/1000185613
Veröffentlicht am 10.10.2025
Cover der Publikation
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
Publikationsdatum 09.07.2025
Sprache Englisch
Identifikator ISSN: 1029-8479
KITopen-ID: 1000185613
Erschienen in Journal of High Energy Physics
Verlag Scuola Internazionale Superiore di Studi Avanzati (SISSA)
Band 2025
Heft 7
Seiten Art.-Nr.: 118
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