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Centrality-Dependent Modification of Jet-Production Rates in Deuteron-Gold Collisions at √[s(NN)]=200 GeV.
- Source :
-
Physical review letters [Phys Rev Lett] 2016 Mar 25; Vol. 116 (12), pp. 122301. Date of Electronic Publication: 2016 Mar 24. - Publication Year :
- 2016
-
Abstract
- Jet production rates are measured in p+p and d+Au collisions at sqrt[s&#95;{NN}]=200 GeV recorded in 2008 with the PHENIX detector at the Relativistic Heavy Ion Collider. Jets are reconstructed using the R=0.3 anti-k&#95;{t} algorithm from energy deposits in the electromagnetic calorimeter and charged tracks in multiwire proportional chambers, and the jet transverse momentum (p&#95;{T}) spectra are corrected for the detector response. Spectra are reported for jets with 12<p&#95;{T}<50 GeV/c, within a pseudorapidity acceptance of |η|<0.3. The nuclear-modification factor (R&#95;{dAu}) values for 0%-100% d+Au events are found to be consistent with unity, constraining the role of initial state effects on jet production. However, the centrality-selected R&#95;{dAu} values and central-to-peripheral ratios (R&#95;{CP}) show large, p&#95;{T}-dependent deviations from unity, challenging the conventional models that relate hard-process rates and soft-particle production in collisions involving nuclei.
Details
- Language :
- English
- ISSN :
- 1079-7114
- Volume :
- 116
- Issue :
- 12
- Database :
- MEDLINE
- Journal :
- Physical review letters
- Publication Type :
- Academic Journal
- Accession number :
- 27058071
- Full Text :
- https://doi.org/10.1103/PhysRevLett.116.122301