Suppression of inclusive ψ(2S) production in p-Pb collisions with ALICE at the LHC

Charmonia have smaller sizes than light hadrons (down to a few tenths of fm) and large binding energies. They are produced in the initial hard scatterings and therefore they are sensitive to the formation of the Quark-Gluon Plasma (QGP). Due to these properties, they can be used as an useful probe of QGP. The cc-bar binding can be screened by the high density of colour charges present in the QGP, leading to a suppression of the charmonium yields in high-energy nuclear collisions compared to the corresponding production rates in elementary pp collisions at the same energy. The new preliminary results of R_pPb of ψ(2S) at √sNN = 8.16 TeV will be discussed in the symposium. R_pPb of ψ(2S) as a function of p_T and y will also be investigated. The results will be presented and compared to J/ψ and with theoretical calculations