Centrality-Dependent Modification of Jet-Production Rates in Deuteron-Gold Collisions at sNN =200 GeV

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题名:	Centrality-Dependent Modification of Jet-Production Rates in Deuteron-Gold Collisions at sNN =200 GeV
作者:	彭仁傑;Adare, A.
贡献者:	高能與強場物理研究中心
关键词:	Fysik;Natural Sciences;Naturvetenskap;Physical Sciences;Subatomic Physics;Subatom�r fysik
日期:	2016-03-24
上传时间:	2026-04-23 12:00:05 (UTC+8)
出版者:	American Physical Society;United States: American Physical Society (APS)
摘要:	摘要： We measured jet production rates in p+p and d+Au collisions at sNN=200 GeV recorded in 2008 with the PHENIX detector at the Relativistic Heavy Ion Collider. Jets are reconstructed using the R=0.3 anti-kt algorithm from energy deposits in the electromagnetic calorimeter and charged tracks in multiwire proportional chambers, and the jet transverse momentum (pT) spectra are corrected for the detector response. Spectra are reported for jets with 12<pT<50 GeV/c, within a pseudorapidity acceptance of \|η\|<0.3. The nuclear-modification factor (RdAu) values for 0%–100% d+Au events are found to be consistent with unity, constraining the role of initial state effects on jet production. Nonetheless, the centrality-selected RdAu values and central-to-peripheral ratios (RCP) show large, pT-dependent deviations from unity, challenging the conventional models that relate hard-process rates and soft-particle production in collisions involving nuclei. 出版者： United States: American Physical Society (APS) 出版日期： 2016-03-24 出處： Physical Review Letters, 2016-03, Vol.116 (12) 資源來源： American Physical Society Journals 識別號： ISSN: 0031-9007 識別號： DOI: 10.1103/PhysRevLett.116.122301
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