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

Adare, A.

doi:10.1103/PhysRevLett.116.122301

Title: Centrality-Dependent Modification of Jet-Production Rates in Deuteron-Gold Collisions at $\sqrt{s_{N N}} = 200 GeV$

Journal Article · Thu Mar 24 00:00:00 EDT 2016 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.116.122301· OSTI ID:1324119

Adare, A. ^[1]

Univ. of Colorado, Boulder, CO (United States).et al

Jet production rates are measured in p+p and d+Au collisions at $$\sqrt{sNN}$$=200 GeV recorded in 2008 with the PHENIX detector at the Relativistic Heavy Ion Collider. Jets are reconstructed using the R = 0.3 anti-k_t algorithm from energy deposits in the electromagnetic calorimeter and charged tracks in multi-wire 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 (R_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_dAu values and central-to-peripheral ratios (R_CP) show large, p_T -dependent deviations from unity, challenging the conventional models that relate hard-process rates and soft-particle production in collisions involving nuclei.

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Research Organization:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Brookhaven National Lab. (BNL), Upton, NY (United States). Relativistic Heavy Ion Collider (RHIC)

Sponsoring Organization:: USDOE Office of Science (SC), Nuclear Physics (NP)

Contributing Organization:: PHENIX Collaboration

Grant/Contract Number:: AC05-00OR22725; SC00112704

OSTI ID:: 1324119

Alternate ID(s):: OSTI ID: 1243153; OSTI ID: 1335447

Report Number(s):: BNL-112148-2016-JA; PRLTAO; KB0201022; ERKBP09

Journal Information:: Physical Review Letters, Vol. 116, Issue 12; ISSN 0031-9007

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 36 works

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