17-24 July 2013
KTH and Stockholm University Campus
Europe/Stockholm timezone

Measurements of two- and four-particle correlations in pPb collisions with CMS

18 Jul 2013, 09:32
E2 (KTH Campus)


KTH Campus

Talk presentation Ultrarelativistic Heavy Ions Ultrarelativistic Heavy Ions


Monika Sharma (Vanderbilt University (US))


Measurements of two- and four-particle angular correlations for charged particles emitted in pPb collisions are presented over a wide range in pseudorapidity and full azimuth at CMS. The results are compared to 2.76 TeV semi-peripheral PbPb collision data, collected during the 2011 PbPb run, covering a similar range of particle multiplicities. The observed correlations are characterized by the near-side associated pair yields and the azimuthal anisotropy Fourier harmonics (v_n). The second-order (v_2) and third-order (v_3) anisotropy harmonics are extracted using the two-particle azimuthal correlation technique. A four-particle correlation method is also applied to obtain the value of v_2 and further explore the multi-particle nature of the correlations. Both associated pair yields and anisotropy harmonics are studied as a function of particle multiplicity and transverse momentum.

Primary author

Dr Kerstin Borras (Deutsches Elektronen-Synchrotron (DE))

Presentation Materials