A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Emergence of Long-Range Angular Correlations in Low-Multiplicity Proton-Proton Collisions (2024)


ALICE collaboration. (2024). Emergence of Long-Range Angular Correlations in Low-Multiplicity Proton-Proton Collisions. Physical Review Letters, 132(17), Article 172302. https://doi.org/10.1103/PhysRevLett.132.172302


JYU-tekijät tai -toimittajat


Julkaisun tiedot

Julkaisun kaikki tekijät tai toimittajat: ALICE collaboration

Lehti tai sarja: Physical Review Letters

ISSN: 0031-9007

eISSN: 1079-7114

Julkaisuvuosi: 2024

Ilmestymispäivä: 26.04.2024

Volyymi: 132

Lehden numero: 17

Artikkelinumero: 172302

Kustantaja: American Physical Society

Julkaisumaa: Yhdysvallat (USA)

Julkaisun kieli: englanti

DOI: https://doi.org/10.1103/PhysRevLett.132.172302

Julkaisun avoin saatavuus: Avoimesti saatavilla

Julkaisukanavan avoin saatavuus: Osittain avoin julkaisukanava

Julkaisu on rinnakkaistallennettu (JYX): https://jyx.jyu.fi/handle/123456789/95330

Rinnakkaistallenteen verkko-osoite (pre-print):  https://doi.org/10.48550/arXiv.2311.14357


Tiivistelmä

This Letter presents the measurement of near-side associated per-trigger yields, denoted ridge yields, from the analysis of angular correlations of charged hadrons in proton-proton collisions at √s= 13 TeV. Long-range ridge yields are extracted for pairs of charged particles with a pseudorapidity difference of 1.4<|Δη|<1.8 and a transverse momentum of 1<2 GeV/c, as a function of the charged-particle multiplicity measured at midrapidity. This study extends the measurements of the ridge yield to the low multiplicity region, where in hadronic collisions it is typically conjectured that a strongly-interacting medium is unlikely to be formed. The precision of the new results allows for the first direct quantitative comparison with the results obtained in e+e− collisions at √s= 91 GeV, where initial-state effects such as pre-equilibrium dynamics and collision geometry are not expected to play a role. In the multiplicity range where the e+e− results have good precision, the measured ridge yields in pp collisions are substantially larger than the limits set in e+e− annihilations. Consequently, the findings presented in this Letter suggest that the processes involved in e+e− annihilations do not contribute significantly to the emergence of long-range correlations in pp collisions.


YSO-asiasanat: hiukkasfysiikka; ydinfysiikka; kvarkki-gluoniplasma


Liittyvät organisaatiot

JYU-yksiköt:


Hankkeet, joissa julkaisu on tehty


OKM-raportointi: Kyllä

Raportointivuosi: 2024

Alustava JUFO-taso: 3


Viimeisin päivitys 2024-15-06 klo 01:46