Identified Baryon and Meson Distributions at Large Transverse Momenta from<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>Au</mml:mi><mml:mo>+</mml:mo><mml:mi>Au</mml:mi></mml:math>Collisions at<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msqrt><mml:msub><mml:mi>s</mml:mi><mml:mrow><mml:mi>N</mml:mi><mml:mi>N</mml:mi></mml:mrow></mml:msub></mml:msqrt><mml:mo>=</mml:mo><mml:mn>200</mml:mn><mml:mtext> </mml:mtext><mml:mtext> </mml:mtext><mml:mi>GeV</mml:mi></mml:math>
B. I. AbelevYale University, New Haven, Connecticut 06520, USAM. M. AggarwalPanjab University, Chandigarh 160014, IndiaZ. AhammedVariable Energy Cyclotron Centre, Kolkata 700064, IndiaB. D. AndersonKent State University, Kent, Ohio 44242, USAM. AndersonUniversity of California, Davis, California 95616, USAD. ArkhipkinG. S. AverichevY. BaiNIKHEF and Utrecht University, Amsterdam, The NetherlandsJ. BalewskiIndiana University, Bloomington, Indiana 47408, USAO. BarannikovaUniversity of Illinois, Chicago, Illinois, USAL. S. BarnbyUniversity of Birmingham, Birmingham, United KingdomJ. BaudotS. BekeleOhio State University, Columbus, Ohio 43210, USAV. V. BelagaA. Bellingeri-LaurikainenSUBATECH, Nantes, FranceR. BellwiedWayne State University, Detroit, Michigan 48201, USAF. BenedossoNIKHEF and Utrecht University, Amsterdam, The NetherlandsS. BhardwajUniversity of Rajasthan, Jaipur 302004, IndiaA. BhasinUniversity of Jammu, Jammu 180001, IndiaA. K. BhatiPanjab University, Chandigarh 160014, IndiaH. BichselUniversity of Washington, Seattle, Washington 98195, USAJ. BielčíkYale University, New Haven, Connecticut 06520, USAJ. BielčíkováYale University, New Haven, Connecticut 06520, USAL. C. BlandBrookhaven National Laboratory, Upton, New York 11973, USAS.-L. BlythLawrence Berkeley National Laboratory, Berkeley, California 94720, USAB. E. BonnerRice University, Houston, Texas 77251, USAM. BotjeNIKHEF and Utrecht University, Amsterdam, The NetherlandsJ. BouchetSUBATECH, Nantes, FranceA. V. BrandinMoscow Engineering Physics Institute, Moscow, RussiaA. BravarBrookhaven National Laboratory, Upton, New York 11973, USAT. P. BurtonUniversity of Birmingham, Birmingham, United KingdomM. BysterskýNuclear Physics Institute AS CR, 250 68 Řež/Prague, Czech RepublicR. V. CadmanArgonne National Laboratory, Argonne, Illinois 60439, USAX. Z. CaiShanghai Institute of Applied Physics, Shanghai 201800, ChinaM. Calderon De La Barca SanchezUniversity of California, Davis, California 95616, USAJ. Castillo CastellanosNIKHEF and Utrecht University, Amsterdam, The NetherlandsO. CatuYale University, New Haven, Connecticut 06520, USAD. CebraUniversity of California, Davis, California 95616, USAZ. ChajęckiOhio State University, Columbus, Ohio 43210, USAP. ChaloupkaNuclear Physics Institute AS CR, 250 68 Řež/Prague, Czech RepublicS. ChattopadhyayVariable Energy Cyclotron Centre, Kolkata 700064, IndiaH. F. ChenUniversity of Science & Technology of China, Hefei 230026, ChinaC. H. ChengShanghai Institute of Applied Physics, Shanghai 201800, ChinaJ. ChengTsinghua University, Beijing 100084, ChinaM. CherneyCreighton University, Omaha, Nebraska 68178, USAA. ChikanianYale University, New Haven, Connecticut 06520, USAW. ChristieBrookhaven National Laboratory, Upton, New York 11973, USAJ. P. CoffinT. M. CormierWayne State University, Detroit, Michigan 48201, USAM. R. CosentinoUniversidade de Sao Paulo, Sao Paulo, BrazilJ. G. CramerUniversity of Washington, Seattle, Washington 98195, USAH. J. CrawfordUniversity of California, Berkeley, California 94720, USAD. DasVariable Energy Cyclotron Centre, Kolkata 700064, IndiaSantosh K. DasVariable Energy Cyclotron Centre, Kolkata 700064, IndiaS. DashInstitute of Physics, Bhubaneswar 751005, IndiaM. DaugherityUniversity of Texas, Austin, Texas 78712, USAM. M. de MouraUniversidade de Sao Paulo, Sao Paulo, BrazilT. G. DedovichM. DePhillipsBrookhaven National Laboratory, Upton, New York 11973, USAA. A. DerevschikovInstitute of High Energy Physics, Protvino, RussiaL. DidenkoBrookhaven National Laboratory, Upton, New York 11973, USAT. DietelUniversity of Frankfurt, Frankfurt, GermanyP. DjawothoIndiana University, Bloomington, Indiana 47408, USAS. DograUniversity of Jammu, Jammu 180001, IndiaX. DongUniversity of California, Los Angeles, California 90095, USAJ. E. DraperUniversity of California, Davis, California 95616, USAF. DuYale University, New Haven, Connecticut 06520, USAV. B. DuninJ. C. DunlopBrookhaven National Laboratory, Upton, New York 11973, USAM. R. Dutta MazumdarVariable Energy Cyclotron Centre, Kolkata 700064, IndiaV. EckardtMax-Planck-Institut für Physik, Munich, GermanyW. R. EdwardsLawrence Berkeley National Laboratory, Berkeley, California 94720, USAL. G. EfimovВ. ЕмеляновMoscow Engineering Physics Institute, Moscow, RussiaJ. EngelageUniversity of California, Berkeley, California 94720, USAG. EppleyRice University, Houston, Texas 77251, USAB. ErazmusSUBATECH, Nantes, FranceM. EstienneP. FachiniBrookhaven National Laboratory, Upton, New York 11973, USAR. FatemiMassachusetts Institute of Technology, Cambridge, Massachusetts 02139-4307, USAJ. FedorišinP. FilipE. FinchYale University, New Haven, Connecticut 06520, USAV. FineBrookhaven National Laboratory, Upton, New York 11973, USAY. FisyakBrookhaven National Laboratory, Upton, New York 11973, USAJ. FuInstitute of Particle Physics, CCNU (HZNU), Wuhan 430079, ChinaC. A. GagliardiTexas A&M University, College Station, Texas 77843, USAL. GaillardUniversity of Birmingham, Birmingham, United KingdomM. S. GantiVariable Energy Cyclotron Centre, Kolkata 700064, IndiaV. GhazikhanianUniversity of California, Los Angeles, California 90095, USAP. GhoshVariable Energy Cyclotron Centre, Kolkata 700064, IndiaJ. E. GonzalezUniversity of California, Los Angeles, California 90095, USAY. G. GorbunovCreighton University, Omaha, Nebraska 68178, USAH. GosWarsaw University of Technology, Warsaw, PolandO. G. GrebenyukNIKHEF and Utrecht University, Amsterdam, The NetherlandsD. GrosnickValparaiso University, Valparaiso, Indiana 46383, USAS. M. GuertinUniversity of California, Los Angeles, California 90095, USAK. S. F. F. GuimarãesUniversidade de Sao Paulo, Sao Paulo, Brazil
2006lv
ABI
Annotatsiya
Transverse momentum spectra of ${\ensuremath{\pi}}^{\ifmmode\pm\else\textpm\fi{}}$, $p$, and $\overline{p}$ up to $12\text{ }\text{ }\mathrm{GeV}/c$ at midrapidity in centrality selected $\mathrm{Au}+\mathrm{Au}$ collisions at $\sqrt{{s}_{NN}}=200\text{ }\text{ }\mathrm{GeV}$ are presented. In central $\mathrm{Au}+\mathrm{Au}$ collisions, both ${\ensuremath{\pi}}^{\ifmmode\pm\else\textpm\fi{}}$ and $p(\overline{p})$ show significant suppression with respect to binary scaling at ${p}_{T}\ensuremath{\gtrsim}4\text{ }\text{ }\mathrm{GeV}/c$. Protons and antiprotons are less suppressed than ${\ensuremath{\pi}}^{\ifmmode\pm\else\textpm\fi{}}$, in the range $1.5\ensuremath{\lesssim}{p}_{T}\ensuremath{\lesssim}6\text{ }\text{ }\mathrm{GeV}/c$. The ${\ensuremath{\pi}}^{\ensuremath{-}}/{\ensuremath{\pi}}^{+}$ and $\overline{p}/p$ ratios show at most a weak ${p}_{T}$ dependence and no significant centrality dependence. The $p/\ensuremath{\pi}$ ratios in central $\mathrm{Au}+\mathrm{Au}$ collisions approach the values in $p+p$ and $d+\mathrm{Au}$ collisions at ${p}_{T}\ensuremath{\gtrsim}5\text{ }\text{ }\mathrm{GeV}/c$. The results at high ${p}_{T}$ indicate that the partonic sources of ${\ensuremath{\pi}}^{\ifmmode\pm\else\textpm\fi{}}$, $p$, and $\overline{p}$ have similar energy loss when traversing the nuclear medium.
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