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Azimuthal di-hadron correlations in d+Au and Au+Au collisions at $\sqrt{; ; ; s_{; ; ; NN}; ; ; }; ; ; =200$ GeV from STAR (CROSBI ID 170189)

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Aggarwal, M.M. ; ... ; Planinić, Mirko ; ... ; Poljak, Nikola ; ... Azimuthal di-hadron correlations in d+Au and Au+Au collisions at $\sqrt{; ; ; s_{; ; ; NN}; ; ; }; ; ; =200$ GeV from STAR // Physical review. C, Nuclear physics, 82 (2010), 2; 024912-1-024912-14. doi: 10.1103/PhysRevC.82.024912

Podaci o odgovornosti

Aggarwal, M.M. ; ... ; Planinić, Mirko ; ... ; Poljak, Nikola ; ...

engleski

Azimuthal di-hadron correlations in d+Au and Au+Au collisions at $\sqrt{; ; ; s_{; ; ; NN}; ; ; }; ; ; =200$ GeV from STAR

Yields, correlation shapes, and mean transverse momenta \pt{; ; ; }; ; ; of charged particles associated with intermediate to high-\pt{; ; ; }; ; ; trigger particles ($2.5 < \pt < 10$ \GeVc) in d+Au and Au+Au collisions at $\snn=200$ GeV are presented. For associated particles at higher $\pt \gtrsim 2.5$ \GeVc, narrow correlation peaks are seen in d+Au and Au+Au, indicating that the main production mechanism is jet fragmentation. At lower associated particle $\pt < 2$ \GeVc, a large enhancement of the near- ($\dphi \sim 0$) and away-side ($\dphi \sim \pi$) associated yields is found, together with a strong broadening of the away-side azimuthal distributions in Au+Au collisions compared to d+Au measurements, suggesting that other particle production mechanisms play a role. This is further supported by the observed significant softening of the away-side associated particle yield distribution at $\dphi \sim \pi$ in central Au+Au collisions.

particle; yield particle; production hadron hadron; correlation jet; fragmentation STAR hadron; angular distribution charged particle; transverse momentum interaction; (deuteron nucleus) nucleus nucleus; interaction heavy ion; scattering charged particle; multiplicity Brookhaven RHIC Coll 200 GeV-cms/nucleon

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Podaci o izdanju

82 (2)

2010.

024912-1-024912-14

objavljeno

0556-2813

10.1103/PhysRevC.82.024912

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Fizika

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