phi meson production in the forward/backward rapidity region in Cu plus Au collisions at root s(NN)=200 GeV

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2016-02-04
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Adare, Andrew
Apadula, N.
Campbell, Sarah
Ding, Lei
Dion, Alan
Hill, John
Hotvedt, Nels
Kempel, Todd
Lajoie, John
Lebedev, Alexandre
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Ogilvie, Craig
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Physics and Astronomy
Physics and astronomy are basic natural sciences which attempt to describe and provide an understanding of both our world and our universe. Physics serves as the underpinning of many different disciplines including the other natural sciences and technological areas.
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The PHENIX experiment at the Relativistic Heavy Ion Collider has measured phi meson production and its nuclear modification in asymmetric Cu + Au heavy-ion collisions at root s(NN) = 200 GeV at both forward Cu-going direction (1.2 < y < 2.2) and backward Au-going direction (-2.2 < y < -1.2) rapidities. The measurements are performed via the dimuon decay channel and reported as a function of the number of participating nucleons, rapidity, and transverse momentum. In the most central events, 0%-20% centrality, the phi meson yield integrated over 1 < pT < 5 GeV/c prefers a smaller value, which means a larger nuclear modification, in the Cu-going direction compared to the Au-going direction. Additionally, the nuclear-modification factor in Cu + Au collisions averaged over all centrality is measured to be similar to the previous PHENIX result in d + Au collisions for these rapidities.

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This is an article from Physical Review C 93 (2016): 024904, doi:10.1103/PhysRevC.93.024904. Posted with permission.

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Fri Jan 01 00:00:00 UTC 2016
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