Charged pion production in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mn>2</mml:mn><mml:mi>A</mml:mi></mml:mrow></mml:math>to<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mn>8</mml:mn><mml:mi>A</mml:mi><mml:mspace width="0.3em"/><mml:mtext>GeV</mml:mtext></mml:mrow></mml:math>central<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mtext>Au</mml:mtext><mml:mo>+</mml:mo><mml:mtext>Au</mml:mtext></mml:mrow></mml:math>Collisions
J. L. KlayUniversity of California, Davis, California 95616, USAN. N. AjitanandDepartment of Chemistry and Physics, SUNY, Stony Brook, New York 11794-3400, USAJ. M. AlexanderDepartment of Chemistry and Physics, SUNY, Stony Brook, New York 11794-3400, USAMichael AndersonUniversity of California, Davis, California 95616, USADavid BestLawrence Berkeley National Laboratory, Berkeley, California 94720, USAF.P. BradyUniversity of California, Davis, California 95616, USAT. CaseLawrence Berkeley National Laboratory, Berkeley, California 94720, USAW. CaskeyUniversity of California, Davis, California 95616, USAD. CebraUniversity of California, Davis, California 95616, USAJ. L. ChanceUniversity of California, Davis, California 95616, USAP. ChungDepartment of Chemistry and Physics, SUNY, Stony Brook, New York 11794-3400, USAB. ColeColumbia University, New York, New York 10027, USAK.M. CroweLawrence Berkeley National Laboratory, Berkeley, California 94720, USAArkaprava DasThe Ohio State University, Columbus, Ohio 43210, USAJ. E. DraperUniversity of California, Davis, California 95616, USAM. L. GilkesPurdue University, West Lafayette, Indiana 47907-1396, USAS. GushueBrookhaven National Laboratory, Upton, New York 11973, USAM. HeffnerUniversity of California, Davis, California 95616, USAA. HirschPurdue University, West Lafayette, Indiana 47907-1396, USAE. HjortPurdue University, West Lafayette, Indiana 47907-1396, USAL. HuoHarbin Institute of Technology, Harbin, 150001 People’s Republic of ChinaM. JusticeKent State University, Kent, Ohio 44242, USAM. KaplanCarnegie Mellon University, Pittsburgh, Pennsylvania 15213, USAD. KeaneKent State University, Kent, Ohio 44242, USAJ. C. KintnerSt. Mary’s College of California, Moraga, California 94575, USAD. KrofcheckUniversity of Auckland, Auckland, New ZealandR. LaceyDepartment of Chemistry and Physics, SUNY, Stony Brook, New York 11794-3400, USAJ. LauretDepartment of Chemistry and Physics, SUNY, Stony Brook, New York 11794-3400, USAChoi Look LawDepartment of Chemistry and Physics, SUNY, Stony Brook, New York 11794-3400, USAM. A. LisaThe Ohio State University, Columbus, Ohio 43210, USAH. LiuKent State University, Kent, Ohio 44242, USAY. M. LiuHarbin Institute of Technology, Harbin, 150001 People’s Republic of ChinaRobert L. McGrathDepartment of Chemistry and Physics, SUNY, Stony Brook, New York 11794-3400, USAZ. MilosevichCarnegie Mellon University, Pittsburgh, Pennsylvania 15213, USAG. OdyniecLawrence Berkeley National Laboratory, Berkeley, California 94720, USAD. OlsonLawrence Berkeley National Laboratory, Berkeley, California 94720, USAS. PanitkinKent State University, Kent, Ohio 44242, USAC. PinkenburgDepartment of Chemistry and Physics, SUNY, Stony Brook, New York 11794-3400, USAN. PorilePurdue University, West Lafayette, Indiana 47907-1396, USAG. RaiLawrence Berkeley National Laboratory, Berkeley, California 94720, USAH. G. RitterLawrence Berkeley National Laboratory, Berkeley, California 94720, USAJ. L. RomeroUniversity of California, Davis, California 95616, USAR. P. ScharenbergPurdue University, West Lafayette, Indiana 47907-1396, USAB. SrivastavaPurdue University, West Lafayette, Indiana 47907-1396, USAN. T. B. StoneLawrence Berkeley National Laboratory, Berkeley, California 94720, USAT. J. M. SymonsLawrence Berkeley National Laboratory, Berkeley, California 94720, USAS. WangKent State University, Kent, Ohio 44242, USAR. WellsThe Ohio State University, Columbus, Ohio 43210, USAJ. WhitfieldCarnegie Mellon University, Pittsburgh, Pennsylvania 15213, USAT. WienoldLawrence Berkeley National Laboratory, Berkeley, California 94720, USAR. WittKent State University, Kent, Ohio 44242, USAL. WoodUniversity of California, Davis, California 95616, USAW. N. ZhangHarbin Institute of Technology, Harbin, 150001 People’s Republic of China
2003lv
ABI
Annotatsiya
Momentum spectra of charged pions over nearly full rapidity coverage from target to beam rapidity have been extracted from $0\ensuremath{-}5%$ most central $\text{Au}+\text{Au}$ collisions in the beam energy range from $2A$ to $8A\phantom{\rule{0.3em}{0ex}}\text{GeV}$ by the E895 experiment. Using a thermal parametrization to fit the transverse mass spectra, rapidity density distributions are extracted. The observed spectra are compared with predictions from the RQMD version 2.3 cascade model and also to a thermal model including longitudinal flow. The total $4\ensuremath{\pi}$ yields of the charged pions are used to infer an initial-state entropy produced in the collisions.
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