Inclusive cross section and double helicity asymmetry for \pi^0 production in p+p collisions at sqrt(s)=200 GeV: Implications for the polarized gluon distribution in the proton
A. Adare
,
S. Afanasiev
,
C. Aidala
,
N.N. Ajitanand
,
Y. Akiba
,
H. Al-Bataineh
,
J. Alexander
,
K. Aoki
,
Laurent Aphecetche
(1)
,
R. Armendariz
,
S.H. Aronson
,
J. Asai
,
E. T. Atomssa
,
R. Averbeck
,
T.C. Awes
,
B. Azmoun
,
V. Babintsev
,
G. Baksay
,
L. Baksay
,
A. Baldisseri
,
K.N. Barish
,
P.D. Barnes
,
B. Bassalleck
,
S. Bathe
,
S. Batsouli
,
V. Baublis
,
A. Bazilevsky
,
S. Belikov
,
R. Bennett
,
Y. Berdnikov
,
A.A. Bickley
,
J.G. Boissevain
,
H. Borel
,
K. Boyle
,
M.L. Brooks
,
H. Buesching
,
V. Bumazhnov
,
G. Bunce
,
S. Butsyk
,
S. Campbell
,
B.S. Chang
,
J.-L. Charvet
,
S. Chernichenko
,
J. Chiba
,
C.Y. Chi
,
M. Chiu
,
I.J. Choi
,
T. Chujo
,
P. Chung
,
A. Churyn
,
V. Cianciolo
,
C.R. Cleven
,
B.A. Cole
,
M.P. Comets
(2)
,
P. Constantin
,
M. Csanad
,
T. Csörgö
,
T. Dahms
,
K. Das
,
G. David
,
M.B. Deaton
,
K. Dehmelt
,
H. Delagrange
(1)
,
A. Denisov
,
D. d'Enterria
,
A. Deshpande
,
E.J. Desmond
,
O. Dietzsch
,
A. Dion
,
M. Donadelli
,
O. Drapier
,
A. Drees
,
A.K. Dubey
,
A. Durum
,
V. Dzhordzhadze
,
Y.V. Efremenko
,
J. Egdemir
,
F. Ellinghaus
,
W.S. Emam
,
A. Enokizono
,
H. En'Yo
,
S. Esumi
,
K.O. Eyser
,
D.E. Fields
,
M. Finger
,
M. Finger Jr.
,
F. Fleuret
,
S.L. Fokin
,
Z. Fraenkel
,
J.E. Frantz
,
A. Franz
,
A.D. Frawley
,
K. Fujiwara
,
Y. Fukao
,
T. Fusayasu
,
S. Gadrat
(3)
,
I. Garishvili
,
A. Glenn
,
H. Gong
,
M. Gonin
,
J. Gosset
,
Y. Goto
,
R. Granier de Cassagnac
,
N. Grau
,
S.V. Greene
,
M. Grosse Perdekamp
,
T. Gunji
,
H.-A. Gustafsson
,
T. Hachiya
,
A. Hadj Henni
(1)
,
C. Haegemann
,
J.S. Haggerty
,
H. Hamagaki
,
R. Han
,
H. Harada
,
E.P. Hartouni
,
K. Haruna
,
E. Haslum
,
R. Hayano
,
M. Heffner
,
T.K. Hemmick
,
T. Hester
,
X. He
,
H. Hiejima
,
J.C. Hill
,
R. Hobbs
,
M. Hohlmann
,
W. Holzmann
,
K. Homma
,
B. Hong
,
T. Horaguchi
,
D. Hornback
,
T. Ichihara
,
K. Imai
,
M. Inaba
,
Y. Inoue
,
D. Isenhower
,
L. Isenhower
,
M. Ishihara
,
T. Isobe
,
M. Issah
,
A. Isupov
,
B.V. Jacak
,
J. Jia
,
J. Jin
,
O. Jinnouchi
,
B.M. Johnson
,
K.S. Joo
,
D. Jouan
(2)
,
F. Kajihara
,
S. Kametani
,
N. Kamihara
,
J. Kamin
,
M. Kaneta
,
J.H. Kang
,
H. Kanou
,
D. Kawall
,
A.V. Kazantsev
,
A. Khanzadeev
,
J. Kikuchi
,
D.H. Kim
,
D.J. Kim
,
E. Kim
,
E. Kinney
,
A. Kiss
,
E. Kistenev
,
A. Kiyomichi
,
J. Klay
,
C. Klein-Boesing
,
L. Kochenda
,
V. Kochetkov
,
B. Komkov
,
M. Konno
,
D. Kotchetkov
,
A. Kozlov
,
A. Kral
,
A. Kravitz
,
J. Kubart
,
G.J. Kunde
,
N. Kurihara
,
K. Kurita
,
M.J. Kweon
,
Y. Kwon
,
G.S. Kyle
,
R. Lacey
,
Y.-S. Lai
,
J.G. Lajoie
,
A. A. Lebedev
,
D.M. Lee
,
M.K. Lee
,
T. Lee
,
M.J. Leitch
,
M.A.L. Leite
,
B. Lenzi
,
T. Liska
,
A. Litvinenko
,
M.X. Liu
,
X. Li
,
B. Love
,
D. Lynch
,
C.F. Maguire
,
Y.I. Makdisi
,
A. Malakhov
,
M.D. Malik
,
V.I. Manko
,
Y. Mao
,
L. Masek
,
H. Masui
,
F. Matathias
,
M. Mccumber
,
P.L. Mcgaughey
,
Y. Miake
,
P. Mikes
,
K. Miki
,
T.E. Miller
,
A. Milov
,
S. Mioduszewski
,
M. Mishra
,
J.T. Mitchell
,
M. Mitrovski
,
A. Morreale
,
D.P. Morrison
,
T.V. Moukhanova
,
D. Mukhopadhyay
,
J. Murata
,
S. Nagamiya
,
Y. Nagata
,
J.L. Nagle
,
M. Naglis
,
I. Nakagawa
,
Y. Nakamiya
,
T. Nakamura
,
K. Nakano
,
J. Newby
,
M. Nguyen
,
B.E. Norman
,
A.S. Nyanin
,
E. O'Brien
,
S.X. Oda
,
C.A. Ogilvie
,
H. Ohnishi
,
H. Okada
,
K. Okada
,
M. Oka
,
O.O. Omiwade
,
A. Oskarsson
,
M. Ouchida
,
K. Ozawa
,
R. Pak
,
D. Pal
,
A.P.T. Palounek
,
V. Pantuev
,
V. Papavassiliou
,
J. Park
,
W.J. Park
,
S.F. Pate
,
H. Pei
,
J.-C. Peng
,
H. Pereira
,
V. Peresedov
,
D.Yu. Peressounko
,
C. Pinkenburg
,
M.L. Purschke
,
A.K. Purwar
,
H. Qu
,
J. Rak
,
A. Rakotozafindrabe
,
I. Ravinovich
,
K.F. Read
,
S. Rembeczki
,
M. Reuter
,
K. Reygers
,
V. Riabov
,
Y. Riabov
,
G. Roche
(3)
,
A. Romana
,
M. Rosati
,
S.S.E. Rosendahl
,
P. Rosnet
(3)
,
P. Rukoyatkin
,
V.L. Rykov
,
B. Sahlmueller
,
N. Saito
,
T. Sakaguchi
,
S. Sakai
,
H. Sakata
,
V. Samsonov
,
S. Sato
,
S. Sawada
,
J. Seele
,
R. Seidl
,
V. Semenov
,
R. Seto
,
D. Sharma
,
I. Shein
,
A. Shevel
,
T.-A. Shibata
,
K. Shigaki
,
M. Shimomura
,
K. Shoji
,
A. Sickles
,
C.L. Silva
,
D. Silvermyr
,
C. Silvestre
,
K.S. Sim
,
C.P. Singh
,
V. Singh
,
S. Skutnik
,
M. Slunecka
,
A. Soldatov
,
R.A. Soltz
,
W.E. Sondheim
,
S.P. Sorensen
,
I.V. Sourikova
,
F. Staley
,
P.W. Stankus
,
E. Stenlund
,
M. Stepanov
,
A. Ster
,
S.P. Stoll
,
T. Sugitate
,
C. Suire
(2)
,
J. Sziklai
,
T. Tabaru
,
S. Takagi
,
E.M. Takagui
,
A. Taketani
,
Y. Tanaka
,
K. Tanida
,
M.J. Tannenbaum
,
A. Taranenko
,
P. Tarjan
,
T.L. Thomas
,
M. Togawa
,
A. Toia
,
J. Tojo
,
L. Tomasek
,
H. Torii
,
R.S. Towell
,
V.-N. Tram
,
I. Tserruya
,
Y. Tsuchimoto
,
C. Vale
,
H. Valle
,
H.W. van Hecke
,
J. Velkovska
,
R. Vertesi
,
A.A. Vinogradov
,
M. Virius
,
V. Vrba
,
E. Vznuzdaev
,
M. Wagner
,
D. Walker
,
X.R. Wang
,
Y. Watanabe
,
J. Wessels
,
S.N. White
,
D. Winter
,
C.L. Woody
,
M. Wysocki
,
W. Xie
,
Y. Yamaguchi
,
A. Yanovich
,
Z. Yasin
,
J. Ying
,
S. Yokkaichi
,
G.R. Young
,
I. Younus
,
I.E. Yushmanov
,
W.A. Zajc
,
O. Zaudtke
,
C. Zhang
,
S. Zhou
,
J. Zimanyi
,
L. Zolin
A. Adare
- Function : Author
S. Afanasiev
- Function : Author
C. Aidala
- Function : Author
N.N. Ajitanand
- Function : Author
Y. Akiba
- Function : Author
H. Al-Bataineh
- Function : Author
J. Alexander
- Function : Author
K. Aoki
- Function : Author
Laurent Aphecetche
- Function : Author
- PersonId : 2010
- IdHAL : laurent-aphecetche
- ORCID : 0000-0001-7662-3878
- IdRef : 113847653
R. Armendariz
- Function : Author
S.H. Aronson
- Function : Author
J. Asai
- Function : Author
E. T. Atomssa
- Function : Author
R. Averbeck
- Function : Author
T.C. Awes
- Function : Author
B. Azmoun
- Function : Author
V. Babintsev
- Function : Author
G. Baksay
- Function : Author
L. Baksay
- Function : Author
A. Baldisseri
- Function : Author
K.N. Barish
- Function : Author
P.D. Barnes
- Function : Author
B. Bassalleck
- Function : Author
S. Bathe
- Function : Author
S. Batsouli
- Function : Author
V. Baublis
- Function : Author
A. Bazilevsky
- Function : Author
S. Belikov
- Function : Author
R. Bennett
- Function : Author
Y. Berdnikov
- Function : Author
A.A. Bickley
- Function : Author
J.G. Boissevain
- Function : Author
H. Borel
- Function : Author
K. Boyle
- Function : Author
M.L. Brooks
- Function : Author
H. Buesching
- Function : Author
V. Bumazhnov
- Function : Author
G. Bunce
- Function : Author
S. Butsyk
- Function : Author
S. Campbell
- Function : Author
B.S. Chang
- Function : Author
J.-L. Charvet
- Function : Author
S. Chernichenko
- Function : Author
J. Chiba
- Function : Author
C.Y. Chi
- Function : Author
M. Chiu
- Function : Author
I.J. Choi
- Function : Author
T. Chujo
- Function : Author
P. Chung
- Function : Author
A. Churyn
- Function : Author
V. Cianciolo
- Function : Author
C.R. Cleven
- Function : Author
B.A. Cole
- Function : Author
P. Constantin
- Function : Author
M. Csanad
- Function : Author
T. Csörgö
- Function : Author
T. Dahms
- Function : Author
K. Das
- Function : Author
G. David
- Function : Author
M.B. Deaton
- Function : Author
K. Dehmelt
- Function : Author
A. Denisov
- Function : Author
D. d'Enterria
- Function : Author
A. Deshpande
- Function : Author
E.J. Desmond
- Function : Author
O. Dietzsch
- Function : Author
A. Dion
- Function : Author
M. Donadelli
- Function : Author
O. Drapier
- Function : Author
A. Drees
- Function : Author
A.K. Dubey
- Function : Author
A. Durum
- Function : Author
V. Dzhordzhadze
- Function : Author
Y.V. Efremenko
- Function : Author
J. Egdemir
- Function : Author
F. Ellinghaus
- Function : Author
W.S. Emam
- Function : Author
A. Enokizono
- Function : Author
H. En'Yo
- Function : Author
S. Esumi
- Function : Author
K.O. Eyser
- Function : Author
D.E. Fields
- Function : Author
M. Finger
- Function : Author
M. Finger Jr.
- Function : Author
F. Fleuret
- Function : Author
S.L. Fokin
- Function : Author
Z. Fraenkel
- Function : Author
J.E. Frantz
- Function : Author
A. Franz
- Function : Author
A.D. Frawley
- Function : Author
K. Fujiwara
- Function : Author
Y. Fukao
- Function : Author
T. Fusayasu
- Function : Author
I. Garishvili
- Function : Author
A. Glenn
- Function : Author
H. Gong
- Function : Author
M. Gonin
- Function : Author
J. Gosset
- Function : Author
Y. Goto
- Function : Author
R. Granier de Cassagnac
- Function : Author
- PersonId : 739189
- IdHAL : raphgrandecass
- ORCID : 0000-0002-1275-7292
- IdRef : 132136651
N. Grau
- Function : Author
S.V. Greene
- Function : Author
M. Grosse Perdekamp
- Function : Author
T. Gunji
- Function : Author
H.-A. Gustafsson
- Function : Author
T. Hachiya
- Function : Author
C. Haegemann
- Function : Author
J.S. Haggerty
- Function : Author
H. Hamagaki
- Function : Author
R. Han
- Function : Author
H. Harada
- Function : Author
E.P. Hartouni
- Function : Author
K. Haruna
- Function : Author
E. Haslum
- Function : Author
R. Hayano
- Function : Author
M. Heffner
- Function : Author
T.K. Hemmick
- Function : Author
T. Hester
- Function : Author
X. He
- Function : Author
H. Hiejima
- Function : Author
J.C. Hill
- Function : Author
R. Hobbs
- Function : Author
M. Hohlmann
- Function : Author
W. Holzmann
- Function : Author
K. Homma
- Function : Author
B. Hong
- Function : Author
T. Horaguchi
- Function : Author
D. Hornback
- Function : Author
T. Ichihara
- Function : Author
K. Imai
- Function : Author
M. Inaba
- Function : Author
Y. Inoue
- Function : Author
D. Isenhower
- Function : Author
L. Isenhower
- Function : Author
M. Ishihara
- Function : Author
T. Isobe
- Function : Author
M. Issah
- Function : Author
A. Isupov
- Function : Author
B.V. Jacak
- Function : Author
J. Jia
- Function : Author
J. Jin
- Function : Author
O. Jinnouchi
- Function : Author
B.M. Johnson
- Function : Author
K.S. Joo
- Function : Author
F. Kajihara
- Function : Author
S. Kametani
- Function : Author
N. Kamihara
- Function : Author
J. Kamin
- Function : Author
M. Kaneta
- Function : Author
J.H. Kang
- Function : Author
H. Kanou
- Function : Author
D. Kawall
- Function : Author
A.V. Kazantsev
- Function : Author
A. Khanzadeev
- Function : Author
J. Kikuchi
- Function : Author
D.H. Kim
- Function : Author
D.J. Kim
- Function : Author
E. Kim
- Function : Author
E. Kinney
- Function : Author
A. Kiss
- Function : Author
E. Kistenev
- Function : Author
A. Kiyomichi
- Function : Author
J. Klay
- Function : Author
C. Klein-Boesing
- Function : Author
L. Kochenda
- Function : Author
V. Kochetkov
- Function : Author
B. Komkov
- Function : Author
M. Konno
- Function : Author
D. Kotchetkov
- Function : Author
A. Kozlov
- Function : Author
A. Kral
- Function : Author
A. Kravitz
- Function : Author
J. Kubart
- Function : Author
G.J. Kunde
- Function : Author
N. Kurihara
- Function : Author
K. Kurita
- Function : Author
M.J. Kweon
- Function : Author
Y. Kwon
- Function : Author
G.S. Kyle
- Function : Author
R. Lacey
- Function : Author
Y.-S. Lai
- Function : Author
J.G. Lajoie
- Function : Author
A. A. Lebedev
- Function : Author
D.M. Lee
- Function : Author
M.K. Lee
- Function : Author
T. Lee
- Function : Author
M.J. Leitch
- Function : Author
M.A.L. Leite
- Function : Author
B. Lenzi
- Function : Author
T. Liska
- Function : Author
A. Litvinenko
- Function : Author
M.X. Liu
- Function : Author
X. Li
- Function : Author
B. Love
- Function : Author
D. Lynch
- Function : Author
C.F. Maguire
- Function : Author
Y.I. Makdisi
- Function : Author
A. Malakhov
- Function : Author
M.D. Malik
- Function : Author
V.I. Manko
- Function : Author
Y. Mao
- Function : Author
L. Masek
- Function : Author
H. Masui
- Function : Author
F. Matathias
- Function : Author
M. Mccumber
- Function : Author
P.L. Mcgaughey
- Function : Author
Y. Miake
- Function : Author
P. Mikes
- Function : Author
K. Miki
- Function : Author
T.E. Miller
- Function : Author
A. Milov
- Function : Author
S. Mioduszewski
- Function : Author
M. Mishra
- Function : Author
J.T. Mitchell
- Function : Author
M. Mitrovski
- Function : Author
A. Morreale
- Function : Author
D.P. Morrison
- Function : Author
T.V. Moukhanova
- Function : Author
D. Mukhopadhyay
- Function : Author
J. Murata
- Function : Author
S. Nagamiya
- Function : Author
Y. Nagata
- Function : Author
J.L. Nagle
- Function : Author
M. Naglis
- Function : Author
I. Nakagawa
- Function : Author
Y. Nakamiya
- Function : Author
T. Nakamura
- Function : Author
K. Nakano
- Function : Author
J. Newby
- Function : Author
M. Nguyen
- Function : Author
B.E. Norman
- Function : Author
A.S. Nyanin
- Function : Author
E. O'Brien
- Function : Author
S.X. Oda
- Function : Author
C.A. Ogilvie
- Function : Author
H. Ohnishi
- Function : Author
H. Okada
- Function : Author
K. Okada
- Function : Author
M. Oka
- Function : Author
O.O. Omiwade
- Function : Author
A. Oskarsson
- Function : Author
M. Ouchida
- Function : Author
K. Ozawa
- Function : Author
R. Pak
- Function : Author
D. Pal
- Function : Author
A.P.T. Palounek
- Function : Author
V. Pantuev
- Function : Author
V. Papavassiliou
- Function : Author
J. Park
- Function : Author
- PersonId : 755381
- ORCID : 0000-0003-0866-7523
W.J. Park
- Function : Author
S.F. Pate
- Function : Author
H. Pei
- Function : Author
J.-C. Peng
- Function : Author
H. Pereira
- Function : Author
V. Peresedov
- Function : Author
D.Yu. Peressounko
- Function : Author
C. Pinkenburg
- Function : Author
M.L. Purschke
- Function : Author
A.K. Purwar
- Function : Author
H. Qu
- Function : Author
J. Rak
- Function : Author
A. Rakotozafindrabe
- Function : Author
I. Ravinovich
- Function : Author
K.F. Read
- Function : Author
S. Rembeczki
- Function : Author
M. Reuter
- Function : Author
K. Reygers
- Function : Author
V. Riabov
- Function : Author
Y. Riabov
- Function : Author
A. Romana
- Function : Author
M. Rosati
- Function : Author
S.S.E. Rosendahl
- Function : Author
P. Rukoyatkin
- Function : Author
V.L. Rykov
- Function : Author
B. Sahlmueller
- Function : Author
N. Saito
- Function : Author
T. Sakaguchi
- Function : Author
S. Sakai
- Function : Author
H. Sakata
- Function : Author
V. Samsonov
- Function : Author
S. Sato
- Function : Author
S. Sawada
- Function : Author
J. Seele
- Function : Author
R. Seidl
- Function : Author
V. Semenov
- Function : Author
R. Seto
- Function : Author
D. Sharma
- Function : Author
I. Shein
- Function : Author
A. Shevel
- Function : Author
T.-A. Shibata
- Function : Author
K. Shigaki
- Function : Author
M. Shimomura
- Function : Author
K. Shoji
- Function : Author
A. Sickles
- Function : Author
C.L. Silva
- Function : Author
D. Silvermyr
- Function : Author
C. Silvestre
- Function : Author
K.S. Sim
- Function : Author
C.P. Singh
- Function : Author
V. Singh
- Function : Author
S. Skutnik
- Function : Author
M. Slunecka
- Function : Author
A. Soldatov
- Function : Author
R.A. Soltz
- Function : Author
W.E. Sondheim
- Function : Author
S.P. Sorensen
- Function : Author
I.V. Sourikova
- Function : Author
F. Staley
- Function : Author
P.W. Stankus
- Function : Author
E. Stenlund
- Function : Author
M. Stepanov
- Function : Author
A. Ster
- Function : Author
S.P. Stoll
- Function : Author
T. Sugitate
- Function : Author
J. Sziklai
- Function : Author
T. Tabaru
- Function : Author
S. Takagi
- Function : Author
E.M. Takagui
- Function : Author
A. Taketani
- Function : Author
Y. Tanaka
- Function : Author
K. Tanida
- Function : Author
M.J. Tannenbaum
- Function : Author
A. Taranenko
- Function : Author
P. Tarjan
- Function : Author
T.L. Thomas
- Function : Author
M. Togawa
- Function : Author
A. Toia
- Function : Author
J. Tojo
- Function : Author
L. Tomasek
- Function : Author
H. Torii
- Function : Author
R.S. Towell
- Function : Author
V.-N. Tram
- Function : Author
I. Tserruya
- Function : Author
Y. Tsuchimoto
- Function : Author
C. Vale
- Function : Author
H. Valle
- Function : Author
H.W. van Hecke
- Function : Author
J. Velkovska
- Function : Author
R. Vertesi
- Function : Author
A.A. Vinogradov
- Function : Author
M. Virius
- Function : Author
V. Vrba
- Function : Author
E. Vznuzdaev
- Function : Author
M. Wagner
- Function : Author
D. Walker
- Function : Author
X.R. Wang
- Function : Author
Y. Watanabe
- Function : Author
J. Wessels
- Function : Author
S.N. White
- Function : Author
D. Winter
- Function : Author
C.L. Woody
- Function : Author
M. Wysocki
- Function : Author
W. Xie
- Function : Author
Y. Yamaguchi
- Function : Author
A. Yanovich
- Function : Author
Z. Yasin
- Function : Author
J. Ying
- Function : Author
S. Yokkaichi
- Function : Author
G.R. Young
- Function : Author
I. Younus
- Function : Author
I.E. Yushmanov
- Function : Author
W.A. Zajc
- Function : Author
O. Zaudtke
- Function : Author
C. Zhang
- Function : Author
S. Zhou
- Function : Author
J. Zimanyi
- Function : Author
L. Zolin
- Function : Author
Abstract
The PHENIX experiment presents results from the RHIC 2005 run with polarized proton collisions at sqrt(s)=200 GeV, for inclusive \pi^0 production at mid-rapidity. Unpolarized cross section results are given for transverse momenta p_T=0.5 to 20 GeV/c, extending the range of published data to both lower and higher p_T. The cross section is described well for p_T < 1 GeV/c by an exponential in p_T, and, for p_T > 2 GeV/c, by perturbative QCD. Double helicity asymmetries A_LL are presented based on a factor of five improvement in uncertainties as compared to previously published results, due to both an improved beam polarization of 50%, and to higher integrated luminosity. These measurements are sensitive to the gluon polarization in the proton, and exclude maximal values for the gluon polarization.