Evidence for Color Transparency and Direct Hadron Production at RHIC

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The QCD color transparency of higher-twist contributions to the inclusive hadroproduction cross section, where the trigger proton is produced directly in a short-distance subprocess, can explain several remarkable features of high-p{sub T} proton production in heavy ion collisions which have recently been observed at RHIC: (a) the anomalous increase of the p {yields} {pi} ratio with centrality (b): the more rapid power-law fall-off at fixed x{sub T} = 2p{sub T}/{radical}s of the charged particle production cross section in high centrality nuclear collisions, and (c): the anomalous decrease of the number of same-side hadrons produced in association with a proton trigger ... continued below

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15 pages

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Brodsky, S February 4, 2008.

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The QCD color transparency of higher-twist contributions to the inclusive hadroproduction cross section, where the trigger proton is produced directly in a short-distance subprocess, can explain several remarkable features of high-p{sub T} proton production in heavy ion collisions which have recently been observed at RHIC: (a) the anomalous increase of the p {yields} {pi} ratio with centrality (b): the more rapid power-law fall-off at fixed x{sub T} = 2p{sub T}/{radical}s of the charged particle production cross section in high centrality nuclear collisions, and (c): the anomalous decrease of the number of same-side hadrons produced in association with a proton trigger as the centrality increases. These phenomena illustrate how heavy ion collisions can provide sensitive tools for interpreting and testing fundamental properties of QCD.

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15 pages

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  • Journal Name: RHIC News

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  • Report No.: SLAC-PUB-13082
  • Grant Number: AC02-76SF00515
  • Office of Scientific & Technical Information Report Number: 923311
  • Archival Resource Key: ark:/67531/metadc895819

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  • February 4, 2008

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  • Sept. 27, 2016, 1:39 a.m.

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  • Dec. 5, 2016, 3:24 p.m.

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Brodsky, S. Evidence for Color Transparency and Direct Hadron Production at RHIC, article, February 4, 2008; [Menlo Park, California]. (digital.library.unt.edu/ark:/67531/metadc895819/: accessed September 22, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.