Detailed Study of High-pT Neutral Pion Suppression and Azimuthal Anisotropy in Au+Au Collisions at $\sqrt{s_{NN}}$ = 200 GeV - IN2P3 - Institut national de physique nucléaire et de physique des particules Access content directly
Journal Articles Physical Review C Year : 2007

Detailed Study of High-pT Neutral Pion Suppression and Azimuthal Anisotropy in Au+Au Collisions at $\sqrt{s_{NN}}$ = 200 GeV

S.S. Adler , S. Afanasiev , C. Aidala , N.N. Ajitanand , Y. Akiba , J. Alexander , R. Amirikas , Laurent Aphecetche (1) , S.H. Aronson , R. Averbeck , T.C. Awes , R. Azmoun , V. Babintsev , A. Baldisseri (2) , K.N. Barish , P.D. Barnes , B. Bassalleck , S. Bathe , S. Batsouli , V. Baublis , A. Bazilevsky , S. Belikov , Y. Berdnikov , S. Bhagavatula , J.G. Boissevain , H. Borel (2) , S. Borenstein (3) , M.L. Brooks , D.S. Brown , N. Bruner , D. Bucher , H. Buesching , V. Bumazhnov , G. Bunce , J.M. Burward-Hoy , S. Butsyk , X. Camard (1) , J.-S. Chai , P. Chand , W.C. Chang , S. Chernichenko , C.Y. Chi , J. Chiba , M. Chiu , I.J. Choi , J. Choi , R.K. Choudhury , T. Chujo , V. Cianciolo , Y. Cobigo (2) , B.A. Cole , P. Constantin , D. d'Enterria (1) , G. David , H. Delagrange (1) , A. Denisov , A. Deshpande , E.J. Desmond , A. Devismes , O. Dietzsch , O. Drapier (1, 3) , A. Drees , K.A. Drees , A. Durum , D. Dutta , Y.V. Efremenko , K. El Chenawi , A. Enokizono , H. En'Yo , S. Esumi , L. Ewell , D.E. Fields , F. Fleuret (3) , S.L. Fokin , B.D. Fox , Z. Fraenkel , J.E. Frantz , A. Franz , A.D. Frawley , S.-Y. Fung , S. Garpman , T.K. Ghosh , A. Glenn , G. Gogiberidze , M. Gonin (3) , J. Gosset (2) , Y. Goto , R. Granier de Cassagnac (3) , N. Grau , S.V. Greene , M. Grosse Perdekamp , W. Guryn , H.-A. Gustafsson , T. Hachiya , J.S. Haggerty , H. Hamagaki , A.G. Hansen , E.P. Hartouni , M. Harvey , R. Hayano , N. Hayashi , X. He , M. Heffner , T.K. Hemmick , J.M. Heuser , M. Hibino , J.C. Hill , W. Holzmann , K. Homma , B. Hong , A. Hoover , T. Ichihara , V.V. Ikonnikov , K. Imai , D. Isenhower , M. Ishihara , M. Issah , A. Isupov , B.V. Jacak , W.Y. Jang , Y. Jeong , J. Jia , O. Jinnouchi , B.M. Johnson , S.C. Johnson , K.S. Joo , D. Jouan (4) , S. Kametani , N. Kamihara , J.H. Kang , S.S. Kapoor , K. Katou , Steven Kelly , B. Khachaturov , A. Khanzadeev , J. Kikuchi , D.H. Kim , D.J. Kim , D.W. Kim , E. Kim , G.-B. Kim (3) , H.J. Kim , E. Kistenev , A. Kiyomichi , K. Kiyoyama , C. Klein-Boesing , H. Kobayashi , L. Kochenda , V. Kochetkov , D. Koehler , T. Kohama , M. Kopytine , D. Kotchetkov , A. Kozlov , P.J. Kroon , C.H. Kuberg , K. Kurita , Y. Kuroki , M.J. Kweon , Y. Kwon , G.S. Kyle , R. Lacey , V. Ladygin , J.G. Lajoie , A. A. Lebedev , D.M. Lee , S. Yip Lee , M.J. Leitch , X.H. Li , H. Lim , A. Litvinenko , M.X. Liu , Yehan Liu , C.F. Maguire , Y.I. Makdisi , A. Malakhov , V.I. Manko , Y. Mao , Gines Martinez Garcia (1) , M.D. Marx , H. Masui , F. Matathias , T. Matsumoto , P.L. Mcgaughey , E. Melnikov , F. Messer , Y. Miake , J. Milan , T.E. Miller , A. Milov , S. Mioduszewski , R.E. Mischke , G.C. Mishra , A.K. Mohanty , D.P. Morrison , J.M. Moss , F. Mühlbacher , D. Mukhopadhyay , M. Muniruzzaman , J. Murata , S. Nagamiya , J.L. Nagle , T. Nakamura , B.K. Nandi , M. Nara , J. Newby , P. Nilsson , A.S. Nyanin , J. Nystrand , E. O'Brien , C.A. Ogilvie , H. Ohnishi , I.D. Ojha , K. Okada , M. Ono , V. Onuchin , A. Oskarsson , I. Otterlund , K. Oyama , K. Ozawa , D. Pal , A.P.T. Palounek , V. Pantuev , V. Papavassiliou , J. Park , A. Parmar , S.F. Pate , T. Peitzmann , J.-C. Peng , V. Peresedov , C. Pinkenburg , R.P. Pisani , F. Plasil , M.L. Purschke , A.K. Purwar , J. Rak , I. Ravinovich , K.F. Read , M. Reuter , K. Reygers , V. Riabov , Y. Riabov , G. Roche (5) , A. Romana (3) , M. Rosati , P. Rosnet (5) , S.S. Ryu , M.E. Sadler , N. Saito , T. Sakaguchi , M. Sakai , S. Sakai , V. Samsonov , L. Sanfratello , R. Santo , H.D. Sato , S. Sato , S. Sawada , Y. Schutz (1) , V. Semenov , R. Seto , M.R. Shaw , T.K. Shea , T.-A. Shibata , K. Shigaki , T. Shiina , C.L. Silva , D. Silvermyr , K.S. Sim , C.P. Singh , V. Singh , M. Sivertz , A. Soldatov , R.A. Soltz , W.E. Sondheim , S.P. Sorensen , I.V. Sourikova , F. Staley (2) , P.W. Stankus , E. Stenlund , M. Stepanov , A. Ster , S.P. Stoll , T. Sugitate , J.P. Sullivan , E.M. Takagui , A. Taketani , M. Tamai , K.H. Tanaka , Y. Tanaka , K. Tanida , M.J. Tannenbaum , P. Tarjan , J.D. Tepe , T.L. Thomas , J. Tojo , H. Torii , R.S. Towell , I. Tserruya , H. Tsuruoka , S.K. Tuli , H. Tydesjö , N. Tyurin , J. Velkovska , M. Velkovsky , V. Veszpremi , L. Villatte , A.A. Vinogradov , M.A. Volkov , E. Vznuzdaev , X.R. Wang , Y. Watanabe , S.N. White , F.K. Wohn , C.L. Woody , W. Xie , Y. Yang , A. Yanovich , S. Yokkaichi , G.R. Young , I.E. Yushmanov , W.A. Zajc , C. Zhang , S. Zhou , S.J. Zhou , L. Zolin , R. Du Rietz
S.S. Adler
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S. Afanasiev
  • Function : Author
C. Aidala
  • Function : Author
N.N. Ajitanand
  • Function : Author
Y. Akiba
  • Function : Author
J. Alexander
  • Function : Author
R. Amirikas
  • Function : Author
Laurent Aphecetche
S.H. Aronson
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R. Averbeck
  • Function : Author
T.C. Awes
  • Function : Author
R. Azmoun
  • Function : Author
V. Babintsev
  • Function : Author
K.N. Barish
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P.D. Barnes
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B. Bassalleck
  • Function : Author
S. Bathe
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S. Batsouli
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V. Baublis
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A. Bazilevsky
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S. Belikov
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Y. Berdnikov
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S. Bhagavatula
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J.G. Boissevain
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M.L. Brooks
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D.S. Brown
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N. Bruner
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D. Bucher
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H. Buesching
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V. Bumazhnov
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G. Bunce
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J.M. Burward-Hoy
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S. Butsyk
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J.-S. Chai
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P. Chand
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W.C. Chang
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S. Chernichenko
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C.Y. Chi
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J. Chiba
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M. Chiu
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I.J. Choi
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J. Choi
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R.K. Choudhury
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T. Chujo
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V. Cianciolo
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B.A. Cole
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P. Constantin
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G. David
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A. Denisov
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A. Deshpande
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E.J. Desmond
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A. Devismes
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O. Dietzsch
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A. Drees
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K.A. Drees
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A. Durum
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D. Dutta
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Y.V. Efremenko
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K. El Chenawi
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A. Enokizono
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H. En'Yo
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S. Esumi
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L. Ewell
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D.E. Fields
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S.L. Fokin
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B.D. Fox
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Z. Fraenkel
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J.E. Frantz
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A. Franz
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A.D. Frawley
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S.-Y. Fung
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S. Garpman
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T.K. Ghosh
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A. Glenn
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G. Gogiberidze
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Y. Goto
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R. Granier de Cassagnac
N. Grau
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S.V. Greene
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M. Grosse Perdekamp
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W. Guryn
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H.-A. Gustafsson
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T. Hachiya
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J.S. Haggerty
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H. Hamagaki
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A.G. Hansen
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E.P. Hartouni
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M. Harvey
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R. Hayano
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N. Hayashi
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X. He
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M. Heffner
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T.K. Hemmick
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J.M. Heuser
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M. Hibino
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J.C. Hill
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W. Holzmann
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K. Homma
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B. Hong
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A. Hoover
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T. Ichihara
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V.V. Ikonnikov
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K. Imai
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D. Isenhower
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M. Ishihara
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M. Issah
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A. Isupov
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B.V. Jacak
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W.Y. Jang
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Y. Jeong
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J. Jia
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O. Jinnouchi
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B.M. Johnson
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S.C. Johnson
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K.S. Joo
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S. Kametani
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N. Kamihara
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J.H. Kang
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S.S. Kapoor
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K. Katou
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Steven Kelly
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B. Khachaturov
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A. Khanzadeev
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J. Kikuchi
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D.H. Kim
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D.J. Kim
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D.W. Kim
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E. Kim
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H.J. Kim
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E. Kistenev
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A. Kiyomichi
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K. Kiyoyama
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C. Klein-Boesing
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H. Kobayashi
L. Kochenda
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V. Kochetkov
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D. Koehler
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T. Kohama
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M. Kopytine
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D. Kotchetkov
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A. Kozlov
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P.J. Kroon
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C.H. Kuberg
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K. Kurita
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Y. Kuroki
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M.J. Kweon
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Y. Kwon
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G.S. Kyle
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R. Lacey
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V. Ladygin
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J.G. Lajoie
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A. A. Lebedev
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D.M. Lee
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S. Yip Lee
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M.J. Leitch
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X.H. Li
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H. Lim
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A. Litvinenko
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M.X. Liu
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Yehan Liu
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C.F. Maguire
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Y.I. Makdisi
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A. Malakhov
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V.I. Manko
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Y. Mao
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Gines Martinez Garcia
M.D. Marx
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H. Masui
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F. Matathias
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T. Matsumoto
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P.L. Mcgaughey
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E. Melnikov
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F. Messer
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J. Milan
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T.E. Miller
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A. Milov
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S. Mioduszewski
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R.E. Mischke
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G.C. Mishra
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A.K. Mohanty
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D.P. Morrison
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J.M. Moss
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F. Mühlbacher
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D. Mukhopadhyay
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M. Muniruzzaman
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J. Murata
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S. Nagamiya
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J.L. Nagle
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T. Nakamura
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B.K. Nandi
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M. Nara
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P. Nilsson
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A.S. Nyanin
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J. Nystrand
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E. O'Brien
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C.A. Ogilvie
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H. Ohnishi
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I.D. Ojha
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K. Okada
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M. Ono
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V. Onuchin
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A. Oskarsson
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I. Otterlund
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K. Oyama
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K. Ozawa
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D. Pal
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A.P.T. Palounek
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V. Pantuev
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V. Papavassiliou
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J. Park
A. Parmar
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S.F. Pate
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T. Peitzmann
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J.-C. Peng
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V. Peresedov
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C. Pinkenburg
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R.P. Pisani
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F. Plasil
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M.L. Purschke
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A.K. Purwar
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J. Rak
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I. Ravinovich
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K.F. Read
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M. Reuter
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K. Reygers
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V. Riabov
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Y. Riabov
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M. Rosati
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S.S. Ryu
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M.E. Sadler
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N. Saito
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T. Sakaguchi
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M. Sakai
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S. Sakai
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V. Samsonov
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L. Sanfratello
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R. Santo
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H.D. Sato
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S. Sato
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S. Sawada
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V. Semenov
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R. Seto
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M.R. Shaw
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C.P. Singh
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V. Singh
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M. Sivertz
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A. Soldatov
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R.A. Soltz
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W.E. Sondheim
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S.P. Sorensen
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I.V. Sourikova
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P.W. Stankus
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E. Stenlund
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M. Stepanov
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A. Ster
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S.P. Stoll
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T. Sugitate
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J.P. Sullivan
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M. Tamai
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M.J. Tannenbaum
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P. Tarjan
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J.D. Tepe
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T.L. Thomas
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J. Tojo
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H. Torii
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R.S. Towell
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I. Tserruya
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H. Tsuruoka
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S.K. Tuli
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H. Tydesjö
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N. Tyurin
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J. Velkovska
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M. Velkovsky
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V. Veszpremi
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L. Villatte
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A.A. Vinogradov
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M.A. Volkov
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E. Vznuzdaev
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X.R. Wang
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Y. Watanabe
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S.N. White
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F.K. Wohn
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C.L. Woody
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W. Xie
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Y. Yang
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A. Yanovich
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S. Yokkaichi
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G.R. Young
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I.E. Yushmanov
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W.A. Zajc
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C. Zhang
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S. Zhou
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S.J. Zhou
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L. Zolin
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R. Du Rietz
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Abstract

Measurements of neutral pion production at midrapidity in sqrt(s_NN) = 200 GeV Au+Au collisions as a function of transverse momentum, p_T, collision centrality, and angle with respect to reaction plane are presented. The data represent the final pi^0 results from the PHENIX experiment for the first RHIC Au+Au run at design center-of-mass-energy. They include additional data obtained using the PHENIX Level-2 trigger with more than a factor of three increase in statistics over previously published results for p_T > 6 GeV/c. We evaluate the suppression in the yield of high-p_T pi^0's relative to point-like scaling expectations using the nuclear modification factor R_AA. We present the p_T dependence of R_AA for nine bins in collision centrality. We separately integrate R_AA over larger p_T bins to show more precisely the centrality dependence of the high-p_T suppression. We then evaluate the dependence of the high-p_T suppression on the emission angle \Delta\phi of the pions with respect to event reaction plane for 7 bins in collision centrality. We show that the yields of high-p_T pi^0's vary strongly with \Delta\phi, consistent with prior measurements. We show that this variation persists in the most peripheral bin accessible in this analysis. For the peripheral bins we observe no suppression for neutral pions produced aligned with the reaction plane while the yield of pi^0's produced perpendicular to the reaction plane is suppressed by more than a factor of 2. We analyze the combined centrality and \Delta\phi dependence of the pi^0 suppression in different p_T bins using different possible descriptions of parton energy loss dependence on jet path-length averages to determine whether a single geometric picture can explain the observed suppression pattern.

Dates and versions

in2p3-00177586 , version 1 (08-10-2007)

Identifiers

Cite

S.S. Adler, S. Afanasiev, C. Aidala, N.N. Ajitanand, Y. Akiba, et al.. Detailed Study of High-pT Neutral Pion Suppression and Azimuthal Anisotropy in Au+Au Collisions at $\sqrt{s_{NN}}$ = 200 GeV. Physical Review C, 2007, 76, pp.034904. ⟨10.1103/PhysRevC.76.034904⟩. ⟨in2p3-00177586⟩
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