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Forward neutral pion production in p+p and d+Au collisions at root(S)(NN)=200 GeV

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Title	Forward neutral pion production in p+p and d+Au collisions at root(S)(NN)=200 GeV

Creator	ADAMS, J AGGARWAL, MM AHAMMED, Z AMONETT, J ANDERSON, BD ARKHIPKIN, D AVERICHEV, GS BADYAL, SK BAI, Y BALEWSKI, J BARANNIKOVA, O BARNBY, LS BAUDOT, J BEKELE, S BELAGA, VV BELLINGERI-LAURIKAINEN, A BELLWIED, R BERGER, J BEZVERKHNY, BI BHARADWAJ, S BHASIN, A BHATI, AK BHATIA, VS BICHSEL, H BIELCIK, J BIELCIKOVA, J BILLMEIER, A BLAND, LC BLYTH, CO BLYTH, SL BONNER, BE BOTJE, M BOUCHAM, A BOUCHET, J BRANDIN, AV BRAVAR, A BYSTERSKY, M CADMAN, RV CAI, XZ CAINES, H SANCHEZ, MCD CATU, O CEBRA, D CHAJECKI, Z CHALOUPKA, P CHATTOPADHYAY, S CHEN, HF CHEN, JH CHEN, Y CHENG, J CHERNEY, M CHIKANIAN, A CHOI, HA CHRISTIE, W COFFIN, JP CORMIER, TM COSENTINO, MR CRAMER, JG CRAWFORD, HJ DAS, D DAS, S DAUGHERITY, M DE MOURA, MM DEDOVICH, TG DEPHILLIPS, M DEREVSCHIKOV, AA DIDENKO, L DIETEL, T DOGRA, SM DONG, WJ DONG, X DRAPER, JE DU, F DUBEY, AK DUNIN, VB DUNLOP, JC MAZUMDAR, MRD ECKARDT, V EDWARDS, WR EFIMOV, LG EMELIANOV, V ENGELAGE, J EPPLEY, G ERAZMUS, B ESTIENNE, M FACHINI, P FAIVRE, J FATEMI, R FEDORISIN, J FILIMONOV, K FILIP, P FINCH, E FISYAK, Y FORNAZIER, KSF FOX, BD FU, J GAGLIARDI, CA GAILLARD, L GANS, J GANTI, MS GEURTS, F GHAZIKHANIAN, V GHOSH, P GONZALEZ, JE GORBUNOV, YG GOS, H GRACHOV, O GREBENYUK, O GROSNICK, D GUERTIN, SM GUO, Y GUPTA, A GUPTA, N GUTIERREZ, TD HALLMAN, TJ HAMED, A HARRIS, JW HEINZ, M HENRY, TW HEPPLEMANN, S HIPPOLYTE, B HIRSCH, A HJORT, E HOFFMANN, GW HORNER, MJ HUANG, HZ HUANG, SL HUGHES, EW HUMANIC, TJ IGO, G JACOBS, P JACOBS, WW JIANG, H JONES, PG JUDD, EG KABANA, S KANG, K KEANE, D KECHECHYAN, A KHODYREV, VY KIM, BC KIRYLUK, J KISIEL, A KISLOV, EM KLEIN, SR KOETKE, DD KOLLEGGER, T KOPYTINE, M KOTCHENDA, L KOWALIK, KL KRAMER, M KRAVTSOV, P KRAVTSOV, VI KRUEGER, K KUHN, C KULIKOV, AI KUMAR, A KUTUEV, RK KUZNETSOV, AA LAMB, R LAMONT, MAC LANDGRAF, JM LANGE, S LAUE, F LAURET, J LEBEDEV, A LEDNICKY, R LEE, CH LEHOCKA, S LEVINE, MJ LI, C LI, Q LI, Y LIN, G LINDENBAUM, SJ LISA, MA LIU, F LIU, H LIU, J LIU, L LIU, QJ LIU, Z LJUBICIC, T LLOPE, WJ LONG, H LONGACRE, RS LOPEZ-NORIEGA, M LOVE, WA LU, Y LUDLAM, T LYNN, D MA, GL MA, JG MA, YG MAGESTRO, D MAHAJAN, S MAHAPATRA, DP MAJKA, R MANGOTRA, LK MANWEILER, R MARGETIS, S MARKERT, C MARTIN, L MARX, JN MATIS, HS MATULENKO, YA MCCLAIN, CJ MCSHANE, TS MELNICK, Y MESCHANIN, A MARTIN, L MARX, JN MATIS, HS MATULENKO, YA MCCLAIN, CJ MCSHANE, TS MELNICK, Y MESCHANIN, A MILLER, ML MINAEV, NG MIRONOV, C MISCHKE, A MISHRA, DK MITCHELL, J MIODUSZEWSKI, S MOHANTY, B MOLNAR, L MOORE, CF MOROZOV, DA MUNHOZ, MG NANDI, BK NAYAK, SK NAYAK, TK NELSON, JM NETRAKANTI, PK NIKITIN, VA NOGACH, LV NURUSHEV, SB ODYNIEC, G OGAWA, A OKOROKOV, V OLDENBURG, M OLSON, D PAL, SK PANEBRATSEV, Y PANITKIN, SY PAVLINOV, AI PAWLAK, T PEITZMANN, T PEREVOZTCHIKOV, V PERKINS, C PERYT, W PETROV, VA PHATAK, SC PICHA, R PLANINIC, M PLUTA, J PORILE, N PORTER, J POSKANZER, AM POTEKHIN, M POTREBENIKOVA, E POTUKUCHI, BVKS PRINDLE, D PRUNEAU, C PUTSCHKE, J RAKNESS, G RANIWALA, R RANIWALA, S RAVEL, O RAY, RL RAZIN, SV REICHHOLD, D REID, JG REINNARTH, J RENAULT, G RETIERE, F RIDIGER, A RITTER, HG ROBERTS, JB ROGACHEVSKIY, OV ROMERO, JL ROSE, A ROY, C RUAN, L RUSSCHER, MJ SAHOO, R SAKREJDA, I SALUR, S SANDWEISS, J SARSOUR, M SAVIN, I SAZHIN, PS SCHAMBACH, J SCHARENBERG, RP SCHMITZ, N SCHWEDA, K SEGER, J SELYUZHENKOV, I SEYBOTH, P SHABETAI, A SHAHALIEV, E SHAO, M SHAO, W SHARMA, M SHEN, WQ SHESTERMANOV, KE SHIMANSKIY, SS SICHTERMANN, E SIMON, F SINGARAJU, RN SMIRNOV, N SNELLINGS, R SOOD, G SORENSEN, P SOWINSKI, J SPELTZ, J SPINKA, HM SRIVASTAVA, B STADNIK, A STANISLAUS, TDS STOCK, R STOLPOVSKY, A STRIKHANOV, M STRINGFELLOW, B SUAIDE, AAP SUGARBAKER, E SUMBERA, M SURROW, B SWANGER, M SYMONS, TJM DE TOLEDO, AS TAI, A TAKAHASHI, J TANG, AH TARNOWSKY, T THEIN, D THOMAS, JH TIMMINS, AR TIMOSHENKO, S TOKAREV, M TRAINOR, TA TRENTALANGE, S TRIBBLE, RE TSAI, OD ULERY, J ULLRICH, T UNDERWOOD, DG VAN BUREN, G VAN DER KOLK, N VAN LEEUWEN, M MOLEN, AMV VARMA, R VASILEVSKI, IM VASILIEV, AN VERNET, R VIGDOR, SE VIYOGI, YP VOKAL, S VOLOSHIN, SA WAGGONER, WT WANG, F WANG, G WANG, G WANG, XL WANG, Y WANG, Y WANG, ZM WARD, H WATSON, JW WEBB, JC WESTFALL, GD WETZLER, A WHITTEN, C WIEMAN, H WISSINK, SW WITT, R WOOD, J WU, J XU, N XU, QH XU, Z XU, ZZ YEPES, P YOO, IK YUREVICH, VI ZBOROVSKY, I ZHANG, H ZHANG, WM ZHANG, Y ZHANG, ZP ZHONG, C ZOULKARNEEV, R ZOULKARNEEVA, Y ZUBAREV, AN ZUO, JX

Subject	proton-nucleus collisions color glass condensate gluon distribution ep scattering qcd fragmentation pp

Description	Measurements of the production of forward pi(0) mesons from p+p and d+Au collisions at root s(NN) = 200 GeV are reported. The p+p yield generally agrees with next-to-leading order perturbative QCD calculations. The d+Au yield per binary collision is suppressed as eta increases, decreasing to similar to 30% of the p+p yield at =4.00, well below shadowing expectations. Exploratory measurements of azimuthal correlations of the forward pi(0) with charged hadrons at eta approximate to 0 show a recoil peak in p+p that is suppressed in d+Au at low pion energy. These observations are qualitatively consistent with a saturation picture of the low-x gluon structure of heavy nuclei.

Publisher	AMER PHYSICAL SOC

Date	2011-10-30T08:04:14Z 2011-12-26T13:00:09Z 2011-12-27T05:53:28Z 2011-10-30T08:04:14Z 2011-12-26T13:00:09Z 2011-12-27T05:53:28Z 2006

Type	Article

Identifier	PHYSICAL REVIEW LETTERS, 97(15) 0031-9007 http://dx.doi.org/10.1103/PhysRevLett.97.152302 http://dspace.library.iitb.ac.in/xmlui/handle/10054/16496 http://hdl.handle.net/10054/16496

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Forward neutral pion production in p+p and d+Au collisions at root(S)(NN)=200 GeV

DSpace at IIT Bombay