First measurements of the azimuthal anisotropy of neutral pions produced in Pb-Pb collisions at a center-of-mass energy of root S-NN = 2.76 TeV are presented. The amplitudes of the second Fourier component (upsilon(2)) of the pi(0) azimuthal distributions are extracted using an event-plane technique. The values of upsilon(2) are studied as a function of the neutral pion transverse momentum (p(T)) for different classes of collision centrality in the kinematic range 1.6< p(T)<8.0 GeV/c, within the pseudorapidity interval vertical bar eta vertical bar < 0.8. The CMS measurements of upsilon(2)(p(T)) are similar to previously reported pi(0) azimuthal anisotropy results from root S-NN = 200 GeV Au-Au collisions at RHIC, despite a factor of similar to 14 increase in the centerof-mass energy. In the momentum range 2.5<p(T)<5.0 GeV/c, the neutral pion anisotropies are found to be smaller than those observed by CMS for inclusive charged particles. DOI: 10.1103/PhysRevLett.110.042301

First measurements of the azimuthal anisotropy of neutral pions produced in Pb-Pb collisions at a center-of-mass energy of root S-NN = 2.76 TeV are presented. The amplitudes of the second Fourier component (upsilon(2)) of the pi(0) azimuthal distributions are extracted using an event-plane technique. The values of upsilon(2) are studied as a function of the neutral pion transverse momentum (p(T)) for different classes of collision centrality in the kinematic range 1.6< p(T)<8.0 GeV/c, within the pseudorapidity interval vertical bar eta vertical bar < 0.8. The CMS measurements of upsilon(2)(p(T)) are similar to previously reported pi(0) azimuthal anisotropy results from root S-NN = 200 GeV Au-Au collisions at RHIC, despite a factor of similar to 14 increase in the centerof-mass energy. In the momentum range 2.5<p(T)<5.0 GeV/c, the neutral pion anisotropies are found to be smaller than those observed by CMS for inclusive charged particles. DOI: 10.1103/PhysRevLett.110.042301 RI De La Cruz Burelo, Eduard/B-9802-2013; Bagliesi, Giuseppe/C-2230-2013; Santaolalla, Javier/C-3094-2013; Petrushanko, Sergey/D-6880-2012; Della Ricca, Giuseppe/B-6826-2013; Lokhtin, Igor/D-7004-2012; Tinoco Mendes, Andre David/D-4314-2011; Raidal, Martti/F-4436-2012; Novaes, Sergio/D-3532-2012; Wulz, Claudia-Elisabeth/H-5657-2011; Fruhwirth, Rudolf/H-2529-2012; Janssen, Xavier/E-1915-2013 OI De La Cruz Burelo, Eduard/0000-0002-7469-6974; Della Ricca, Giuseppe/0000-0003-2831-6982; Tinoco Mendes, Andre David/0000-0001-5854-7699; Novaes, Sergio/0000-0003-0471-8549;

Measurement of the Azimuthal Anisotropy of Neutral Pions in Pb-Pb Collisions at root S-NN=2.76 TeV

ALBERGO, Sebastiano Francesco;Costa S.;TRICOMI, Alessia Rita;TUVE', Cristina Natalina;
2013

Abstract

First measurements of the azimuthal anisotropy of neutral pions produced in Pb-Pb collisions at a center-of-mass energy of root S-NN = 2.76 TeV are presented. The amplitudes of the second Fourier component (upsilon(2)) of the pi(0) azimuthal distributions are extracted using an event-plane technique. The values of upsilon(2) are studied as a function of the neutral pion transverse momentum (p(T)) for different classes of collision centrality in the kinematic range 1.6< p(T)<8.0 GeV/c, within the pseudorapidity interval vertical bar eta vertical bar < 0.8. The CMS measurements of upsilon(2)(p(T)) are similar to previously reported pi(0) azimuthal anisotropy results from root S-NN = 200 GeV Au-Au collisions at RHIC, despite a factor of similar to 14 increase in the centerof-mass energy. In the momentum range 2.5
First measurements of the azimuthal anisotropy of neutral pions produced in Pb-Pb collisions at a center-of-mass energy of root S-NN = 2.76 TeV are presented. The amplitudes of the second Fourier component (upsilon(2)) of the pi(0) azimuthal distributions are extracted using an event-plane technique. The values of upsilon(2) are studied as a function of the neutral pion transverse momentum (p(T)) for different classes of collision centrality in the kinematic range 1.6< p(T)<8.0 GeV/c, within the pseudorapidity interval vertical bar eta vertical bar < 0.8. The CMS measurements of upsilon(2)(p(T)) are similar to previously reported pi(0) azimuthal anisotropy results from root S-NN = 200 GeV Au-Au collisions at RHIC, despite a factor of similar to 14 increase in the centerof-mass energy. In the momentum range 2.5<p(T)<5.0 GeV/c, the neutral pion anisotropies are found to be smaller than those observed by CMS for inclusive charged particles. DOI: 10.1103/PhysRevLett.110.042301 RI De La Cruz Burelo, Eduard/B-9802-2013; Bagliesi, Giuseppe/C-2230-2013; Santaolalla, Javier/C-3094-2013; Petrushanko, Sergey/D-6880-2012; Della Ricca, Giuseppe/B-6826-2013; Lokhtin, Igor/D-7004-2012; Tinoco Mendes, Andre David/D-4314-2011; Raidal, Martti/F-4436-2012; Novaes, Sergio/D-3532-2012; Wulz, Claudia-Elisabeth/H-5657-2011; Fruhwirth, Rudolf/H-2529-2012; Janssen, Xavier/E-1915-2013 OI De La Cruz Burelo, Eduard/0000-0002-7469-6974; Della Ricca, Giuseppe/0000-0003-2831-6982; Tinoco Mendes, Andre David/0000-0001-5854-7699; Novaes, Sergio/0000-0003-0471-8549;
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11769/13714
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