Evidence for Similar Collectivity of High Transverse-Momentum Particles in p-Pb and Pb-Pb Collisions

Chekhovsky, V.; Hayrapetyan, A.; Makarenko, V.; Tumasyan, A.; Adam, W.; Andrejkovic, J. W.; Benato, L.; Bergauer, T.; Chatterjee, S.; Damanakis, K.; Dragicevic, M.; Hussain, P. S.; Jeitler, Manfred; Krammer, N.; Li, A.; Liko, D.; Mikulec, I.; Schieck, J.; Schöfbeck, Robert; Wulz, Claudia-Elisabeth; Druzhkin, D.; CMS Collaboration

doi:10.1103/t5kp-vsv7

Record link:

http://hdl.handle.net/20.500.12708/221977

Title:

Citation:

Chekhovsky, V., Hayrapetyan, A., Makarenko, V., Tumasyan, A., Adam, W., Andrejkovic, J. W., Benato, L., 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., … CMS Collaboration. (2025). Evidence for Similar Collectivity of High Transverse-Momentum Particles in p-Pb and Pb-Pb Collisions. Physical Review Letters, 135(7), Article 071903. https://doi.org/10.1103/t5kp-vsv7

Publisher DOI:

10.1103/t5kp-vsv7

Publication Type:

Article - Original Research Article

Language:

English

Author Collaboration:

CMS Collaboration

Organisational Unit:

E141-03 - Forschungsbereich Nuclear and Particle Physics

Journal:

Physical Review Letters

ISSN:

0031-9007

Date (published):

15-Aug-2025

Number of Pages:

Publisher:

AMER PHYSICAL SOC

Peer reviewed:

Yes

Keywords:

p-Pb collisions; Pb-Pb Collisions; CMS

Abstract:

Charged hadron elliptic anisotropies (𝑣2) are presented over a wide transverse momentum (𝑝T) range for proton-lead (𝑝⁢Pb) and lead-lead (PbPb) collisions at nucleon-nucleon center-of-mass energies of 8.16 and 5.02 TeV, respectively. The data were recorded by the CMS experiment and correspond to integrated luminosities of 186 and 0.607 nb⁻¹ for the 𝑝⁢Pb and PbPb systems, respectively. A four-particle cumulant analysis is performed using subevents separated in pseudorapidity to effectively suppress noncollective effects. At high 𝑝T (𝑝T>8 GeV), significant positive 𝑣2 values that are similar between 𝑝⁢Pb and PbPb collisions at comparable charged particle multiplicities are observed. This observation suggests a common origin for the multiparticle collectivity for high-𝑝T particles in the two systems.

Research Areas:

Quantum Metrology and Precision Measurements: 100%

Science Branch:

1030 - Physik, Astronomie: 100%

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Article

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