  Measurements of two- and multi-particle angular correlations in pp collisions
at sqrt(s) = 5, 7, and 13 TeV are presented as a function of charged-particle
multiplicity. The data, corresponding to integrated luminosities of 1.0 inverse
picobarn (5 TeV), 6.2 inverse picobarns (7 TeV), and 0.7 inverse picobarns (13
TeV), were collected using the CMS detector at the LHC. The second-order (v[2])
and third-order (v[3]) azimuthal anisotropy harmonics of unidentified charged
particles, as well as v[2] of K0 short and Lambda/anti-Lambda particles, are
extracted from long-range two-particle correlations as functions of particle
multiplicity and transverse momentum. For high-multiplicity pp events, a mass
ordering is observed for the v[2] values of charged hadrons (mostly pions), K0
short, and Lambda/anti-Lambda, with lighter particle species exhibiting a
stronger azimuthal anisotropy signal below pt of about 2 GeV/c. For 13 TeV
data, the v[2] signals are also extracted from four- and six-particle
correlations for the first time in pp collisions, with comparable magnitude to
those from two-particle correlations. These observations are similar to those
seen in pPb and PbPb collisions, and support the interpretation of a collective
origin for the observed long-range correlations in high-multiplicity pp
collisions.
