CGC/saturation approach: re-visiting the problem of odd harmonics in angular correlations

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Abstract

In this paper we demonstrate that the selection of events with different multiplicities of produced particles, leads to the violation of the azimuthal angular symmetry, ϕ→ π- ϕ. We find for LHC and lower energies, that this violation can be so large for the events with multiplicities n≥ 2 n¯ , where n¯ is the mean multiplicity, that it leads to almost no suppression of vn, with odd n. However, this can only occur if the typical size of the dipole in DIS with a nuclear target is small, or Q2>Qs2(A;Ymin,b), where Qs is the saturation momentum of the nucleus at Y= Ymin. In the case of large sizes of dipoles, when Q2<Qs2(A;Ymin,b), we show that vn= 0 for odd n. Hadron-nucleus scattering is discussed.

Original languageEnglish
Article number792
JournalEuropean Physical Journal C
Volume78
Issue number9
DOIs
StatePublished - 1 Sep 2018

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