Initial State Temperature and Degrees of Freedom in SPS A+A Collisions

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A dramatic rise in the heat capacity <font face="symbol">e</font>T<sup>4</sup> of high-temperature nuclear/QGP matter has been a long-standing prediction in high-energy heavy-ion physics, but is difficult to verify directly. Initial-state energy densities, measured through calorimetery, and limits on initial-state temperature, inferred through measurement of high-P<sub>T</sub> direct photons, can be combined to provide a nearly model-independent lower limit on the beat capacity of initial-state matter in A+A collisions at the CERN-SPS. This is the most direct evidence to date for the rise in the heat capacity, and the implied new degrees of freedon, in high-temperature nuclear matter.

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5 pages

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Stankus, P. March 20, 1999.

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Description

A dramatic rise in the heat capacity <font face="symbol">e</font>T<sup>4</sup> of high-temperature nuclear/QGP matter has been a long-standing prediction in high-energy heavy-ion physics, but is difficult to verify directly. Initial-state energy densities, measured through calorimetery, and limits on initial-state temperature, inferred through measurement of high-P<sub>T</sub> direct photons, can be combined to provide a nearly model-independent lower limit on the beat capacity of initial-state matter in A+A collisions at the CERN-SPS. This is the most direct evidence to date for the rise in the heat capacity, and the implied new degrees of freedon, in high-temperature nuclear matter.

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5 pages

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  • Relativistic Heavy Ion Symposium, American Physical Society Centennial Meeting, Atlanta, GA, March 20-26, 1999

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  • Other: DE00010479
  • Report No.: ORNL/CP-104588
  • Grant Number: AC05-96OR22464
  • Office of Scientific & Technical Information Report Number: 10479
  • Archival Resource Key: ark:/67531/metadc623075

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Office of Scientific & Technical Information Technical Reports

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  • March 20, 1999

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  • June 16, 2015, 7:43 a.m.

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  • Feb. 15, 2016, 12:23 p.m.

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Stankus, P. Initial State Temperature and Degrees of Freedom in SPS A+A Collisions, article, March 20, 1999; Oak Ridge, Tennessee. (digital.library.unt.edu/ark:/67531/metadc623075/: accessed November 25, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.