Direct Measurement of the W Production Charge Asymmetry in pp Collisions at root s=1.96 TeV

Aaltonen, T; Adelman, J; Akimoto, T; Alvarez Gonzalez, B; Amerio, S; Amidei, D; Anastassov, A; Annovi, A; Antos, J; Apollinari, G; Apresyan, A; Arisawa, T; Artikov, A; Ashmanskas, W; Attal, A; Aurisano, A; Azfar, F; Azzurri, P; Badgett, W; Barbaro Galtieri, A; Barnes, Ve; Barnett, Ba; Bartsch, V; Bauer, G; Beauchemin, Ph; Bedeschi, F; Beecher, D; Behari, S; Bellettini, G; Bellinger, J; Benjamin, D; Beretvas, A; Beringer, J; Bhatti, A; Binkley, M; Bisello, D; Bizjak, I; Blair, Re; Blocker, C; Blumenfeld, B; Bocci, A; Bodek, A; Boisvert, V; Bolla, G; Bortoletto, D; Boudreau, J; Boveia, A; Brau, B; Bridgeman, A; Brigliadori, L; Bromberg, C; Brubaker, E; Budagov, J; Budd, Hs; Budd, S; Burke, S; Burkett, K; Busetto, G; Bussey, P; Buzatu, A; Byrum, Kl; Cabrera, S; Calancha, C; Campanelli, M; Campbell, M; Canelli, F; Canepa, A; Carls, B; Carlsmith, D; Carosi, R; Carrillo, S; Carron, S; Casal, B; Casarsa, M; Castro, A; Catastini, P; Cauz, D; Cavaliere, V; Cavalli Sforza, M; Cerri, A; Cerrito, L; 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Masubuchi, T; Mathis, M; Mattson, Me; Mazzanti, P; McFarland, Ks; McIntyre, P; McNulty, R; Mehta, A; Mehtala, P; Menzione, A; Merkel, P; Mesropian, C; Miao, T; Miladinovic, N; Miller, R; Mills, C; Milnik, M; Mitra, A; Mitselmakher, G; Miyake, H; Moggi, N; Moon, Cs; Moore, R; Morello, Mj; Morlock, J; Fernandez, Pm; Mulmenstadt, J; Mukherjee, A; Muller, T; Mumford, R; Murat, P; Mussini, M; Nachtman, J; Nagai, Y; Nagano, A; Naganoma, J; Nakamura, K; Nakano, I; Napier, A; Necula, V; Nett, J; Neu, C; Neubauer, Ms; Neubauer, S; Nielsen, J; Nodulman, L; Norman, M; Norniella, O; Nurse, E; Oakes, L; Oh, Sh; Oh, Yd; Oksuzian, I; Okusawa, T; Orava, R; Osterberg, K; Pagan Griso, S; Palencia, E; Papadimitriou, V; Papaikonomou, A; Paramonov, Aa; Parks, B; Pashapour, S; Patrick, J; Pauletta, G; Paulini, M; Paus, C; Peiffer, T; Pellett, De; Penzo, A; Phillips, Tj; Piacentino, Giovanni Maria; Pianori, E; Pinera, L; Pitts, K; Plager, C; Pondrom, L; Poukhov, O; Pounder, N; Prakoshyn, F; Pronko, A; Proudfoot, J; 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doi:10.1103/PhysRevLett.102.181801

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We present the first direct measurement of the W production charge asymmetry as a function of the W boson rapidity y(W) in pp collisions at root s=1.96 TeV. We use a sample of W -> e nu events in data from 1 fb(-1) of integrated luminosity collected using the CDF II detector. In the region |y(W)|< 3.0, this measurement is capable of constraining the ratio of up- and down-quark momentum distributions in the proton more directly than in previous measurements of the asymmetry that are functions of the charged-lepton pseudorapidity. RI Ruiz, Alberto/E-4473-2011; Robson, Aidan/G-1087-2011; De Cecco, Sandro/B-1016-2012; Prokoshin, Fedor/E-2795-2012

Digital Object Identifier (DOI):	http://dx.doi.org/10.1103/PhysRevLett.102.181801
Codice identificativo ISI:	WOS:000265948600014
Codice identificativo Scopus:	2-s2.0-65549171600
Handle:	http://hdl.handle.net/11695/4203
Abstract:	We present the first direct measurement of the W production charge asymmetry as a function of the W boson rapidity y(W) in pp collisions at root s=1.96 TeV. We use a sample of W -> e nu events in data from 1 fb(-1) of integrated luminosity collected using the CDF II detector. In the region \|y(W)\|< 3.0, this measurement is capable of constraining the ratio of up- and down-quark momentum distributions in the proton more directly than in previous measurements of the asymmetry that are functions of the charged-lepton pseudorapidity. RI Ruiz, Alberto/E-4473-2011; Robson, Aidan/G-1087-2011; De Cecco, Sandro/B-1016-2012; Prokoshin, Fedor/E-2795-2012
Titolo:	Direct Measurement of the W Production Charge Asymmetry in pp Collisions at root s=1.96 TeV
Autori:	Aaltonen T Adelman J Akimoto T Alvarez Gonzalez B Amerio S Amidei D Anastassov A Annovi A Antos J Apollinari G Apresyan A Arisawa T Artikov A Ashmanskas W Attal A Aurisano A Azfar F Azzurri P Badgett W Barbaro Galtieri A Barnes VE Barnett BA Bartsch V Bauer G Beauchemin PH Bedeschi F Beecher D Behari S Bellettini G Bellinger J Benjamin D Beretvas A Beringer J Bhatti A Binkley M Bisello D Bizjak I Blair RE Blocker C Blumenfeld B Bocci A Bodek A Boisvert V Bolla G Bortoletto D Boudreau J Boveia A Brau B Bridgeman A Brigliadori L Bromberg C Brubaker E Budagov J Budd HS Budd S Burke S Burkett K Busetto G Bussey P Buzatu A Byrum KL Cabrera S Calancha C Campanelli M Campbell M Canelli F Canepa A Carls B Carlsmith D Carosi R Carrillo S Carron S Casal B Casarsa M Castro A Catastini P Cauz D Cavaliere V Cavalli Sforza M Cerri A Cerrito L Chang SH Chen YC Chertok M Chiarelli G Chlachidze G Chlebana F Cho K Chokheli D Chou JP Choudalakis G Chuang SH Chung K Chung WH Chung YS Chwalek T Ciobanu CI Ciocci MA Clark A Clark D Compostella G Convery ME Conway J Cordelli M Cortiana G Cox CA Cox DJ Crescioli F Almenar CC Cuevas J Culbertson R Cully JC Dagenhart D Datta M Davies T de Barbaro P De Cecco S Deisher A De Lorenzo G Dell'Orso M Deluca C Demortier L Deng J Deninno M Derwent PF di Giovanni GP Dionisi C Di Ruzza B Dittmann JR D'Onofrio M Donati S Dong P Donini J Dorigo T Dube S Efron J Elagin A Erbacher R Errede D Errede S Eusebi R Fang HC Farrington S Fedorko WT Feild RG Feindt M Fernandez JP Ferrazza C Field R Flanagan G Forrest R Frank MJ Franklin M Freeman JC Furic I Gallinaro M Galyardt J Garberson F Garcia JE Garfinkel AF Genser K Gerberich H Gerdes D Gessler A Giagu S Giakoumopoulou V Giannetti P Gibson K Gimmell JL Ginsburg CM Giokaris N Giordani M Giromini P Giunta M Giurgiu G Glagolev V Glenzinski D Gold M Goldschmidt N Golossanov A Gomez G Gomez Ceballos G Goncharov M Gonzalez O Gorelov I Goshaw AT Goulianos K Gresele A Grinstein S Grosso Pilcher C Group RC Grundler U da Costa JG Gunay Unalan Z Haber C Hahn K Hahn SR Halkiadakis E Han BY Han JY Happacher F Hara K Hare D Hare M Harper S Harr RF Harris RM Hartz M Hatakeyama K Hays C Heck M Heijboer A Heinrich J Henderson C Herndon M Heuser J Hewamanage S Hidas D Hill CS Hirschbuehl D Hocker A Hou S Houlden M Hsu SC Huffman BT Hughes RE Husemann U Hussein M Huston J Incandela J Introzzi G Iori M Ivanov A James E Jang D Jayatilaka B Jeon EJ Jha MK Jindariani S Johnson W Jones M Joo KK Jun SY Jung JE Junk TR Kamon T Kar D Karchin PE Kato Y Kephart R Keung J Khotilovich V Kilminster B Kim DH Kim HS Kim HW Kim JE Kim MJ Kim SB Kim SH Kim YK Kimura N Kirsch L Klimenko S Knuteson B Ko BR Kondo K Kong DJ Konigsberg J Korytov A Kotwal AV Kreps M Kroll J Krop D Krumnack N Kruse M Krutelyov V Kubo T Kuhr T Kulkarni NP Kurata M Kwang S Laasanen AT Lami S Lammel S Lancaster M Lander RL Lannon K Lath A Latino G Lazzizzera I LeCompte T Lee E Lee HS Lee SW Leone S Lewis JD Lin CS Linacre J Lindgren M Lipeles E Lister A Litvintsev DO Liu C Liu T Lockyer NS Loginov A Loreti M Lovas L Lucchesi D Luci C Lueck J Lujan P Lukens P Lungu G Lyons L Lys J Lysak R MacQueen D Madrak R Maeshima K Makhoul K Maki T Maksimovic P Malde S Malik S Manca G Manousakis Katsikakis A Margaroli F Marino C Marino CP Martin A Martin V Martinez M Martinez Ballarin R Maruyama T Mastrandrea P Masubuchi T Mathis M Mattson ME Mazzanti P McFarland KS McIntyre P McNulty R Mehta A Mehtala P Menzione A Merkel P Mesropian C Miao T Miladinovic N Miller R Mills C Milnik M Mitra A Mitselmakher G Miyake H Moggi N Moon CS Moore R Morello MJ Morlock J Fernandez PM Mulmenstadt J Mukherjee A Muller T Mumford R Murat P Mussini M Nachtman J Nagai Y Nagano A Naganoma J Nakamura K Nakano I Napier A Necula V Nett J Neu C Neubauer MS Neubauer S Nielsen J Nodulman L Norman M Norniella O Nurse E Oakes L Oh SH Oh YD Oksuzian I Okusawa T Orava R Osterberg K Pagan Griso S Palencia E Papadimitriou V Papaikonomou A Paramonov AA Parks B Pashapour S Patrick J Pauletta G Paulini M Paus C Peiffer T Pellett DE Penzo A Phillips TJ PIACENTINO, Giovanni Maria Pianori E Pinera L Pitts K Plager C Pondrom L Poukhov O Pounder N Prakoshyn F Pronko A Proudfoot J Ptohos F Pueschel E Punzi G Pursley J Rademacker J Rahaman A Ramakrishnan V Ranjan N Redondo I Renton P Renz M Rescigno M Richter S Rimondi F Ristori L Robson A Rodrigo T Rodriguez T Rogers E Rolli S Roser R Rossi M Rossin R Roy P Ruiz A Russ J Rusu V Rutherford B Saarikko H Safonov A Sakumoto WK Salto O Santi L Sarkar S Sartori L Sato K Savoy Navarro A Schlabach P Schmidt A Schmidt EE Schmidt MA Schmidt MP Schmitt M Schwarz T Scodellaro L Scribano A Scuri F Sedov A Seidel S Seiya Y Semenov A Sexton Kennedy L Sforza F Sfyrla A Shalhout SZ Shears T Shepard PF Shimojima M Shiraishi S Shochet M Shon Y Shreyber I Sidoti A Sinervo P Sisakyan A Slaughter AJ Slaunwhite J Sliwa K Smith JR Snider FD Snihur R Soha A Somalwar S Sorin V Spalding J Spreitzer T Squillacioti P Stanitzki M Denis RS Stelzer B Stelzer Chilton O Stentz D Strologas J Strycker GL Stuart D Suh JS Sukhanov A Suslov I Suzuki T Taffard A Takashima R Takeuchi Y Tanaka R Tecchio M Teng PK Terashi K Thom J Thompson AS Thompson GA Thomson E Tipton P Ttito Guzman P Tkaczyk S Toback D Tokar S Tollefson K Tomura T Tonelli D Torre S Torretta D Totaro P Tourneur S Trovato M Tsai SY Tu Y Turini N Ukegawa F Vallecorsa S van Remortel N Varganov A Vataga E Vazquez F Velev G Vellidis C Vidal M Vidal R Vila I Vilar R Vine T Vogel M Volobouev I Volpi G Wagner P Wagner RG Wagner RL Wagner W Wagner Kuhr J Wakisaka T Wallny R Wang SM Warburton A Waters D Weinberger M Weinelt J Wester WC Whitehouse B Whiteson D Wicklund AB Wicklund E Wilbur S Williams G Williams HH Wilson P Winer BL Wittich P Wolbers S Wolfe C Wright T Wu X Wurthwein F Xie S Yagil A Yamamoto K Yamaoka J Yang UK Yang YC Yao WM Yeh GP Yoh J Yorita K Yoshida T Yu GB Yu I Yu SS Yun JC Zanello L Zanetti A Zhang X Zheng Y Zucchelli S. mostra contributor 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