Электронный каталог

Статья

Tumasyan, A.
Two-Particle Azimuthal Correlations in *gp Interactions Using pPb Collisions at *%s&sub(NN) = 8.16 TeV / A.Tumasyan, S.Afanasiev, P.Bunin, M.Finger, M.Finger Jr., M.Gavrilenko, I.Golutvin, I.Gorbunov, A.Kamenev, V.Karjavine, A.Lanev, A.Malakhov, V.Matveev, V.Palichik, V.Perelygin, M.Savina, D.Seitova, V.Shalaev, S.Shmatov, S.Shulha, V.Smirnov, O.Teryaev, Z.Tsamalaidze, N.Voytishin, A.Zarubin, I.Zhizhin, N.Krasnikov, [CMS Collab.] // Physics Letters B [Electronic resource]. – 2023. – Vol.844. – P.137905. – URL: https://doi.org/10.1016/j.physletb.2023.137905. – Bibliogr.:74.

The first measurements of the Fourier coefficients (Vn) of the azimuthal distributions of charged hadrons emitted from photon-proton (γp) interactions are presented. The data are extracted from 68.8nb−1of ultra-peripheral proton-lead (pPb) collisions at √sNN=8.16TeVusing the CMS detector. The high energy lead ions produce a flux of photons that can interact with the oncoming proton. This γp system provides a set of unique initial conditions with multiplicity lower than in photon-lead collisions but comparable to recent electron-positron and electron-proton data. The Vn coefficients are presented in ranges of event multiplicity and transverse momentum (pT) and are compared to corresponding hadronic minimum bias pPb results. For a given multiplicity range, the mean pTof charged particles is smaller in γp than in pPb collisions. For both the γp and pPb samples, V1 is negative, V2 is positive, and V3 consistent with 0. For each multiplicity and pTrange, V2 is larger for γp events. The γp data are consistent with model predictions that have no collective effects.



Спец.(статьи,препринты) = С 343 б - Взаимодействие гамма-квантов и электронов с ядрами. *g*g-реакции
Спец.(статьи,препринты) = С 343 в - Взаимодействие протонов с ядрами (Z>2). Изобарно- аналоговые состояния
ОИЯИ = ОИЯИ (JINR)2023