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  • Emergence of Long-Range Ang...
    Akindinov, A; Alizadehvandchali, N; Alme, J; Alocco, G; Altamura, A R; Arneiro, J G M C A; Augustinus, A; Banerjee, D; Barile, F; Bartsch, E; Becht, P; Bize, N; Blau, D; Bok, J; Bombara, M; Caines, H; Castillo Castellanos, J; Catalano, F; Chakaberia, I; Choudhury, D; Conesa Del Valle, Z; Cortese, P; Costa, F; Danisch, M C; Danu, A; De Caro, A; Fan, W; Flores, A N; Ghimouz, A; Grabski, V; Grigoryan, S; Guernane, R; Gwizdziel, K; Hamagaki, H; Heybeck, B; Hong, G H; Horst, M; Jahnke, C; Janson, T; Jung, J; Kalinak, P; Kalteyer, A S; Khade, S S; Kim, M; Kondratyeva, N; Konopka, P J; Kotliarov, A; Kumar, D; Lehrbach, J; Lofnes, I M; Lokos, S; Loncar, P; Luparello, G; Ma, Y G; Makariev, M V; Marcjan, R W; Martínez García, G; Morsch, A; Mrnjavac, T; Muhuri, S; Musinsky, J; Myrcha, J W; Naik, B; Nambrath, A I; Nappi, E; Peng, X; Pinsky, L; Rasa, M; Riabov, V; Rodríguez Ramírez, S A; Romanenko, G; Rosano, A; Roy, S; Sas, M H P; Senyukov, S; Sharma, M; Siemiarczuk, T; Silva, T F; Smirnov, N; Sonneveld, J M; Spijkers, R; Sturniolo, A; Suaide, A A P; Szarka, I; Tarasovicova, L A; Valle, N; van Leeuwen, M; van Weelden, R J G; Vande Vyvre, P; Verweij, M; Voloshin, S A; Volpe, G; Vorobyev, I; Wang, Y; Wiechula, J; Yeats, E R; Yoon, J H; Zhang, L; Zhang, X; Zhang, Z

    Physical review letters, 04/2024, Volume: 132, Issue: 17
    Journal Article

    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 sqrts=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<p_{T}<2  GeV/c, as a function of the charged-particle multiplicity measured at midrapidity. This Letter 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 low multiplicity results allows for the first direct quantitative comparison with the results obtained in e^{+}e^{-} collisions at sqrts=91  GeV and sqrts=183-209  GeV, where initial-state effects such as preequilibrium dynamics and collision geometry are not expected to play a role. In the multiplicity range 8≲⟨N_{ch}⟩≲24 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.