https://doi.org/10.1140/epjc/s10052-018-6257-3
Regular Article - Experimental Physics
CGC/saturation approach: re-visiting the problem of odd harmonics in angular correlations
1
Department of Particle Physics, School of Physics and Astronomy, Raymond and Beverly Sackler Faculty of Exact Science, Tel Aviv University, 69978, Tel Aviv, Israel
2
Departemento de Física, Centro Científico- Tecnológico de Valparaíso, Universidad Técnica Federico Santa María, Avda. Espana 1680, Casilla 110-V, Valparaíso, Chile
* e-mail: leving@post.tau.ac.il
** e-mail: eugeny.levin@usm.cl
Received:
23
July
2018
Accepted:
15
September
2018
Published online:
28
September
2018
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, . We find for LHC and lower energies, that this violation can be so large for the events with multiplicities
, where
is the mean multiplicity, that it leads to almost no suppression of
, with odd n. However, this can only occur if the typical size of the dipole in DIS with a nuclear target is small, or
, where
is the saturation momentum of the nucleus at
. In the case of large sizes of dipoles, when
, we show that
for odd n. Hadron-nucleus scattering is discussed.
© The Author(s), 2018