Neutral pion cross section and spin asymmetries at intermediate pseudorapidity in polarized proton collisions at root s=200 GeV

Adamczyk, L; Adkins, JK; Agakishiev, G; Aggarwal, MM; Ahammed, Z; Alekseev, I; Alford, J; Anson, CD; Aparin, A; Arkhipkin, D; Aschenauer, EC; Averichev, GS; Balewski, J; Banerjee, A; Barber, B; Barnovska, Z; Beavis, DR; Bellwied, R; Betancourt, MJ; Bhasin, A; Bhati, AK; Bhattarai, P; Bichsel, H; Bielcik, J; Bielcikova, J; Bland, LC; Bordyuzhin, IG; Borowski, W; Bouchet, J; Brandin, AV; Bridgeman, A; Brovko, SG; Bultmann, S; Bunzarov, I; Burton, TP; Butterworth, J; Caines, H; Sanchez, MCD; Cebra, D; Cendejas, R; Cervantes, MC; Chaloupka, P; Chang, Z; Chattopadhyay, S; Chen, HF; Chen, JH; Chen, L; Cheng, J; Cherney, M; Chikanian, A; Christie, W; Chwastowski, J; Codrington, MJM; Corliss, R; Cramer, JG; Crawford, HJ; Cui, X; Das, S; Leyva, AD; De Silva, LC; Debbe, RR; Dedovich, TG; Deng, J; Derevschikov, AA; de Souza, RD; Dhamija, S; di Ruzza, B; Didenko, L; Dilks, C; Ding, F; Dion, A; Djawotho, P; Dong, X; Drachenberg, JL; Draper, JE; Du, CM; Dunkelberger, LE; Dunlop, JC; Efimov, LG; Engelage, J; Engle, KS; Eppley, G; Eun, L; Evdokimov, O; Fatemi, R; Fazio, S; Fedorisin, J; Fersch, RG; Filip, P; Finch, E; Fisyak, Y; Flores, CE; Gagliardi, CA; Gangadharan, DR; Garand, D; Geurts, F; Gibson, A; Girard, M; Gliske, S; Grosnick, D; Guo, Y; Gupta, A; Gupta, S; Guryn, W; Haag, B; Hajkova, O; Hamed, A; Han, LX; Haque, R; Harris, JW; Hays-Wehle, JP; He, W; Heppelmann, S; Hirsch, A; Hoffmann, GW; Hofman, DJ; Horvat, S; Huang, B; Huang, HZ; Huck, P; Humanic, TJ; Igo, G; Jacobs, WW; Jang, H; Jena, C; Judd, EG; Kabana, S; Kalinkin, D; Kang, K; Kauder, K; Ke, HW; Keane, D; Kechechyan, A; Kesich, A; Khan, ZH; Kikola, DP; Kisel, I; Kisiel, A; Koetke, DD; Kollegger, T; Konzer, J; Koralt, I; Korsch, W; Kotchenda, L; Kravtsov, P; Krueger, K; Kulakov, I; Kumar, L; Kycia, RA; Lamont, MAC; Landgraf, JM; Landry, KD; Lauret, J; Lebedev, A; Lednicky, R; Lee, JH; Leight, W; LeVine, MJ; Li, C; Li, W; Li, X; Li, X; Li, Y; Li, ZM; Lima, LM; Lisa, MA; Liu, F; Ljubicic, T; Llope, WJ; Longacre, RS; Luo, X; Ma, GL; Ma, YG; Don, DMMDM; Mahapatra, DP; Majka, R; Manweiler, R; Margetis, S; Markert, C; Masui, H; Matis, HS; McDonald, D; McShane, TS; Minaev, NG; Mioduszewski, S; Mohanty, B; Mondal, MM; Morozov, DA; Munhoz, MG; Mustafa, MK; Naglis, M; Nandi, BK; Nasim, M; Nayak, TK; Nelson, JM; Nogach, LV; Noh, SY; Nord, PM; Novak, J; Nurushev, SB; Odyniec, G; Ogawa, A; Oh, K; Ohlson, A; Okorokov, V; Oldag, EW; Oliveira, RAN; Olson, D; Pachr, M; Page, BS; Pal, SK; Pan, YX; Pandit, Y; Panebratsev, Y; Pawlak, T; Pawlik, B; Pei, H; Perkins, C; Peryt, W; Peterson, A; Pile, P; Planinic, M; Pluta, J; Plyku, D; Pochron, W; Poljak, N; Porter, J; Poskanzer, AM; Powell, CB; Pruneau, C; Pruthi, NK; Przybycien, M; Pujahari, PR; Putschke, J; Qiu, H; Ramachandran, S; Raniwala, R; Raniwala, S; Ray, RL; Riley, CK; Ritter, HG; Roberts, JB; Rogachevskiy, OV; Romero, JL; Ross, JF; Roy, A; Ruan, L; Rusnak, J; Sahoo, NR; Sahu, PK; Sakrejda, I; Salur, S; Sandacz, A; Sandweiss, J; Sangaline, E; Sarkar, A; Schambach, J; Scharenberg, RP; Schaub, J; Schmah, AM; Schmidke, WB; Schmitz, N; Seger, J; Selyuzhenkov, I; Seyboth, P; Shah, N; Shahaliev, E; Shanmuganathan, PV; Shao, M; Sharma, B; Shen, WQ; Shi, SS; Shou, QY; Sichtermann, EP; Singaraju, RN; Skoby, MJ; Smirnov, D; Smirnov, N; Solanki, D; Sorensen, P; deSouza, UG; Spinka, HM; Srivastava, B; Stanislaus, TDS; Stevens, JR; Stock, R; Strikhanov, M; Stringfellow, B; Suaide, AAP; Sumbera, M; Sun, X; Sun, XM; Sun, Y; Sun, Z; Surrow, B; Svirida, DN; Symons, TJM; de Toledo, AS; Takahashi, J; Tang, AH; Tang, Z; Tarnowsky, T; Thomas, JH; Timmins, AR; Tlusty, D; Tokarev, M; Trentalange, S; Tribble, RE; Tribedy, P; Trzeciak, BA; Tsai, OD; Turnau, J; Ullrich, T; Underwood, DG; Van Buren, G; van Nieuwenhuizen, G; Vanfossen, JA; Varma, R; Vasconcelos, GMS; Vasiliev, AN; Vertesi, R; Videbk, F; Viyogi, YP; Vokal, S; Voloshin, SA; Vossen, A; Wada, M; Walker, M; Wang, F; Wang, G; Wang, H; Wang, JS; Wang, Q; Wang, XL; Wang, Y; Wang, Y; Webb, G; Webb, JC; Westfall, GD; Wieman, H; Wissink, SW; Witt, R; Wu, YF; Xiao, Z; Xie, W; Xin, K; Xu, H; Xu, N; Xu, QH; Xu, W; Xu, Y; Xu, Z; Yan, W; Yang, C; Yang, Y; Yang, Y; Ye, Z; Yepes, P; Yi, L; Yip, K; Yoo, IK; Zawisza, Y; Zbroszczyk, H; Zha, W; Zhang, JB; Zhang, S; Zhang, XP; Zhang, Y; Zhang, ZP; Zhao, F; Zhao, J; Zhong, C; Zhu, X; Zhu, YH; Zoulkarneeva, Y; Zyzak, M

Artículos de revistas

Registration in:

Physical Review D. Amer Physical Soc, v. 89, n. 1, 2014.

1550-7998

1550-2368

WOS:000331864800001

10.1103/PhysRevD.89.012001

http://www.repositorio.unicamp.br/jspui/handle/REPOSIP/65319

http://repositorio.unicamp.br/jspui/handle/REPOSIP/65319

http://repositorioslatinoamericanos.uchile.cl/handle/2250/1272151

Author

Adamczyk, L

Adkins, JK

Agakishiev, G

Aggarwal, MM

Ahammed, Z

Alekseev, I

Alford, J

Anson, CD

Aparin, A

Arkhipkin, D

Aschenauer, EC

Averichev, GS

Balewski, J

Banerjee, A

Barber, B

Barnovska, Z

Beavis, DR

Bellwied, R

Betancourt, MJ

Bhasin, A

Bhati, AK

Bhattarai, P

Bichsel, H

Bielcik, J

Bielcikova, J

Bland, LC

Bordyuzhin, IG

Borowski, W

Bouchet, J

Brandin, AV

Bridgeman, A

Brovko, SG

Bultmann, S

Bunzarov, I

Burton, TP

Butterworth, J

Caines, H

Sanchez, MCD

Cebra, D

Cendejas, R

Cervantes, MC

Chaloupka, P

Chang, Z

Chattopadhyay, S

Chen, HF

Chen, JH

Chen, L

Cheng, J

Cherney, M

Chikanian, A

Christie, W

Chwastowski, J

Codrington, MJM

Corliss, R

Cramer, JG

Crawford, HJ

Cui, X

Das, S

Leyva, AD

De Silva, LC

Debbe, RR

Dedovich, TG

Deng, J

Derevschikov, AA

de Souza, RD

Dhamija, S

di Ruzza, B

Didenko, L

Dilks, C

Ding, F

Dion, A

Djawotho, P

Dong, X

Drachenberg, JL

Draper, JE

Du, CM

Dunkelberger, LE

Dunlop, JC

Efimov, LG

Engelage, J

Engle, KS

Eppley, G

Eun, L

Evdokimov, O

Fatemi, R

Fazio, S

Fedorisin, J

Fersch, RG

Filip, P

Finch, E

Fisyak, Y

Flores, CE

Gagliardi, CA

Gangadharan, DR

Garand, D

Geurts, F

Gibson, A

Girard, M

Gliske, S

Grosnick, D

Guo, Y

Gupta, A

Gupta, S

Guryn, W

Haag, B

Hajkova, O

Hamed, A

Han, LX

Haque, R

Harris, JW

Hays-Wehle, JP

He, W

Heppelmann, S

Hirsch, A

Hoffmann, GW

Hofman, DJ

Horvat, S

Huang, B

Huang, HZ

Huck, P

Humanic, TJ

Igo, G

Jacobs, WW

Jang, H

Jena, C

Judd, EG

Kabana, S

Kalinkin, D

Kang, K

Kauder, K

Ke, HW

Keane, D

Kechechyan, A

Kesich, A

Khan, ZH

Kikola, DP

Kisel, I

Kisiel, A

Koetke, DD

Kollegger, T

Konzer, J

Koralt, I

Korsch, W

Kotchenda, L

Kravtsov, P

Krueger, K

Kulakov, I

Kumar, L

Kycia, RA

Lamont, MAC

Landgraf, JM

Landry, KD

Lauret, J

Lebedev, A

Lednicky, R

Lee, JH

Leight, W

LeVine, MJ

Li, C

Li, W

Li, X

Li, Y

Li, ZM

Lima, LM

Lisa, MA

Liu, F

Ljubicic, T

Llope, WJ

Longacre, RS

Luo, X

Ma, GL

Ma, YG

Don, DMMDM

Mahapatra, DP

Majka, R

Manweiler, R

Margetis, S

Markert, C

Masui, H

Matis, HS

McDonald, D

McShane, TS

Minaev, NG

Mioduszewski, S

Mohanty, B

Mondal, MM

Morozov, DA

Munhoz, MG

Mustafa, MK

Naglis, M

Nandi, BK

Nasim, M

Nayak, TK

Nelson, JM

Nogach, LV

Noh, SY

Nord, PM

Novak, J

Nurushev, SB

Odyniec, G

Ogawa, A

Oh, K

Ohlson, A

Okorokov, V

Oldag, EW

Oliveira, RAN

Olson, D

Pachr, M

Page, BS

Pal, SK

Pan, YX

Pandit, Y

Panebratsev, Y

Pawlak, T

Pawlik, B

Pei, H

Perkins, C

Peryt, W

Peterson, A

Pile, P

Planinic, M

Pluta, J

Plyku, D

Pochron, W

Poljak, N

Porter, J

Poskanzer, AM

Powell, CB

Pruneau, C

Pruthi, NK

Przybycien, M

Pujahari, PR

Putschke, J

Qiu, H

Ramachandran, S

Raniwala, R

Raniwala, S

Ray, RL

Riley, CK

Ritter, HG

Roberts, JB

Rogachevskiy, OV

Romero, JL

Ross, JF

Roy, A

Ruan, L

Rusnak, J

Sahoo, NR

Sahu, PK

Sakrejda, I

Salur, S

Sandacz, A

Sandweiss, J

Sangaline, E

Sarkar, A

Schambach, J

Scharenberg, RP

Schaub, J

Schmah, AM

Schmidke, WB

Schmitz, N

Seger, J

Selyuzhenkov, I

Seyboth, P

Shah, N

Shahaliev, E

Shanmuganathan, PV

Shao, M

Sharma, B

Shen, WQ

Shi, SS

Shou, QY

Sichtermann, EP

Singaraju, RN

Skoby, MJ

Smirnov, D

Smirnov, N

Solanki, D

Sorensen, P

deSouza, UG

Spinka, HM

Srivastava, B

Stanislaus, TDS

Stevens, JR

Stock, R

Strikhanov, M

Stringfellow, B

Suaide, AAP

Sumbera, M

Sun, X

Sun, XM

Sun, Y

Sun, Z

Surrow, B

Svirida, DN

Symons, TJM

de Toledo, AS

Takahashi, J

Tang, AH

Tang, Z

Tarnowsky, T

Thomas, JH

Timmins, AR

Tlusty, D

Tokarev, M

Trentalange, S

Tribble, RE

Tribedy, P

Trzeciak, BA

Tsai, OD

Turnau, J

Ullrich, T

Underwood, DG

Van Buren, G

van Nieuwenhuizen, G

Vanfossen, JA

Varma, R

Vasconcelos, GMS

Vasiliev, AN

Vertesi, R

Videbk, F

Viyogi, YP

Vokal, S

Voloshin, SA

Vossen, A

Wada, M

Walker, M

Wang, F

Wang, G

Wang, H

Wang, JS

Wang, Q

Wang, XL

Wang, Y

Webb, G

Webb, JC

Westfall, GD

Wieman, H

Wissink, SW

Witt, R

Wu, YF

Xiao, Z

Xie, W

Xin, K

Xu, H

Xu, N

Xu, QH

Xu, W

Xu, Y

Xu, Z

Yan, W

Yang, C

Yang, Y

Ye, Z

Yepes, P

Yi, L

Yip, K

Yoo, IK

Zawisza, Y

Zbroszczyk, H

Zha, W

Zhang, JB

Zhang, S

Zhang, XP

Zhang, Y

Zhang, ZP

Zhao, F

Zhao, J

Zhong, C

Zhu, X

Zhu, YH

Zoulkarneeva, Y

Zyzak, M

Institutions

Universidade Estadual de Campinas (Brasil)

Abstract

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

The differential cross section and spin asymmetries for neutral pions produced within the intermediate pseudorapidity range 0.8 < eta < 2.0 in polarized proton-proton collisions at root s = 200 GeV are presented. Neutral pions were detected using the end cap electromagnetic calorimeter in the STAR detector at RHIC. The cross section was measured over a transverse momentum range of 5 < p(T) < 16 GeV/c and is found to agree with a next-to-leading order perturbative QCD calculation. The longitudinal double-spin asymmetry A(LL) is measured in the same pseudorapidity range and spans a range of Bjorken-x down to x approximate to 0.01. The measured A(LL) is consistent with model predictions for varying degrees of gluon polarization. The parity-violating asymmetry A(L) is also measured and found to be consistent with zero. The transverse single-spin asymmetry A(N) is measured over a previously unexplored kinematic range in Feynman-x and p(T). Such measurements may aid our understanding of the onset and kinematic dependence of the large asymmetries observed at more forward pseudorapidity (eta approximate to 3) and their underlying mechanisms. The A(N) results presented are consistent with a twist-3 model prediction of a small asymmetry over the present kinematic range.

Office of NP within the U.S. DOE Office of Science

Office of HEP within the U.S. DOE Office of Science

U.S. NSF

CNRS/IN2P3

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Ministry of Education and Science of the Russian Federation

NNSFC

CAS

MoST

MoE of China

Korean Research Foundation

GA of the Czech Republic

MSMT of the Czech Republic

FIAS of Germany

DAE of India

DST of India

CSIR of India

National Science Centre of Poland

National Research Foundation [NRF-2012004024]

Ministry of Science, Education and Sports of the Republic of Croatia

RosAtom of Russia

Renaissance Technologies Corporation

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

National Research Foundation [NRF-2012004024]

Subjects

Star

Qcd

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