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24 April 2024 |
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Where Does the Energy Loss Lose Strength? | | G. G. Barnafoldi
; G. Fai
; P. Levai
; G. Papp
; B. A. Cole
; | | Date: |
3 May 2008 | | Abstract: | Nuclear modification factors for pion production in AuAu and CuCu collisions
are analyzed at very high transverse momenta. At p_T > 10 GeV/c, the
R_{AA}(p_T) is determined mostly by the initial state nuclear modifications
(e.g. EMC effect) and the non-Abelian jet-energy loss in the final state. At
high momenta these effects together are strong enough to suppress R_{AA}(p_T)
to below 1 at RHIC energies. We display results using HKN shadowing in our pQCD
improved parton model. Result of a similar calculation at LHC energies for PbPb
collisions are also displayed. Based on dN/dy estimates, a larger opacity
value, L/lambda_g = 10 +/- 2, is used for the produced partonic matter in
central collisions at the LHC. | | Source: | arXiv, 0805.0335 | | Services: | Forum | Review | PDF | Favorites | |
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