Physics and Astronomy
Journal or Book Title
Physical Review C
We present a systematic study of charged-pion and kaon interferometry in Au + Au collisions at root s(NN) = 200 GeV. The kaon mean source radii are found to be larger than pion radii in the outward and longitudinal directions for the same transverse mass; this difference increases for more central collisions. The azimuthal-angle dependence of the radii was measured with respect to the second-order event plane and similar oscillations of the source radii were found for pions and kaons. Hydrodynamic models qualitatively describe the similar oscillations of the mean source radii for pions and kaons, but they do not fully describe the transverse-mass dependence of the oscillations.
American Physical Society
Adare, Andrew; Apadula, Nicole; Campbell, Sarah C.; Hill, John C.; Hotvedt, Nels J.; Kempel, Todd; Lajoie, John G.; Lebedev, Alexandre; Ogilvie, Craig; Patel, Milap R.; Pei, H.; Perry, Joshua; Rinn, Timothy T.; Rosati, Marzia; Semenov, Alexey Yu.; Shimomura, M.; Timilsina, Arbin; Vale, Carla; Wei, Feng; et al.; and PHENIX Collaboration, "Systematic study of charged-pion and kaon femtoscopy in Au plus Au collisions at root s(NN)=200 GeV" (2015). Physics and Astronomy Publications. 212.