Measurement of the azimuthal anisotropy of neutral pions in PbPb collisions at √sNN=2.76 TeV
- CMS Collaboration
- Chatrchyan, Serguei
- Bäni, Lukas
- Bortignon, Pierluigi
- Buchmann, Marco A.
- Casal, Bruno
- Chanon, Nicolas
- Deisher, Amanda
- Dissertori, Günther
- Dittmar, Michael
- Donegà, Mauro
- Dünser, Marc
- Eugster, Jürg
- Freudenreich, Klaus
- Grab, Christoph
- Hits, Dmitry
- Lecomte, Pierre
- Lustermann, Werner
- Marini, Andrea C.
- Martinez Ruiz del Arbol, Pablo
- Mohr, Niklas
- Moortgat, Filip
- Nägeli, Christoph
- Nef, Pascal
- Nessi-Tedaldi, Francesca
- Pandolfi, Francesco
- Pape, Luc
- Pauss, Felicitas
- Peruzzi, Marco
- Ronga, Frédéric J.
- Rossini, Marco
- Sala, Leonardo
- Sanchez, Ann-Karin
- Starodumov, Andrey
- Stieger, Benjamin
- Takahashi, Maiko
- Tauscher, Ludwig
- Thea, Alessandro
- Theofilatos, Konstantinos
- Treille, Daniel
- Urscheler, Christina
- Wallny, Rainer
- Weber, Hannsjörg A.
- Wehrli, Lukas
- et al.
DOIAbstract
First measurements of the azimuthal anisotropy of neutral pions produced in Pb-Pb collisions at a center-of-mass energy of √sNN=2.76 TeV are presented. The amplitudes of the second Fourier component (v2) of the π0 azimuthal distributions are extracted using an event-plane technique. The values of v2 are studied as a function of the neutral pion transverse momentum (pT) for different classes of collision centrality in the kinematic range 1.6<pT<8.0 GeV/c, within the pseudorapidity interval |η|<0.8. The CMS measurements of v2(pT) are similar to previously reported π0 azimuthal anisotropy results from √sNN=200 GeV Au-Au collisions at RHIC, despite a factor of ∼14 increase in the center-of-mass energy. In the momentum range 2.5<pT<5.0 GeV/c...
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