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Measurements of inclusive W and Z cross sections in p\overline{p} collisions at \sqrt{s} = 1\hbox{.}96\, {{\rm TeV}}

A Abulencia1, D Acosta2, J Adelman3, T Affolder4, T Akimoto5, M G Albrow6, D Ambrose6, S Amerio7, D Amidei8, A Anastassov9, K Anikeev6, A Annovi10, J Antos11, M Aoki5, G Apollinari6, J-F Arguin12,13, T Arisawa14, A Artikov15, W Ashmanskas6, A Attal16, F Azfar17, P Azzi-Bacchetta7, P Azzurri10, N Bacchetta7, H Bachacou18, W Badgett6, A Barbaro-Galtieri18, V E Barnes19, B A Barnett20, S Baroiant21, V Bartsch22, G Bauer23, F Bedeschi10, S Behari20, S Belforte24, G Bellettini10, J Bellinger25, A Belloni23, E Ben-Haim6, D Benjamin26, A Beretvas6, J Beringer18, T Berry27, A Bhatti28, M Binkley6, D Bisello7, M Bishai6, R E Blair29, C Blocker30, K Bloom8, B Blumenfeld20, A Bocci28, A Bodek31, V Boisvert31, G Bolla19, A Bolshov23, D Bortoletto19, J Boudreau32, S Bourov6, A Boveia4, B Brau4, C Bromberg33, E Brubaker3, J Budagov15, H S Budd31, S Budd1, K Burkett6, G Busetto7, P Bussey34, K L Byrum29, S Cabrera26, M Campanelli35, M Campbell8, F Canelli16, A Canepa19, D Carlsmith25, R Carosi10, S Carron26, M Casarsa24, A Castro36, P Catastini10, D Cauz24, M Cavalli-Sforza37, A Cerri18, L Cerrito17, S H Chang38,39,40, J Chapman8, Y C Chen11, M Chertok21, G Chiarelli10, G Chlachidze15, F Chlebana6, I Cho38,39,40, K Cho38,39,40, D Chokheli15, J P Chou41, P H Chu1, S H Chuang25, K Chung42, W H Chung25, Y S Chung31, M Ciljak10, C I Ciobanu1, M A Ciocci10, A Clark35, D Clark30, M Coca26, A Connolly18, M E Convery28, J Conway21, B Cooper22, K Copic8, M Cordelli43, G Cortiana7, A Cruz2, J Cuevas44, R Culbertson6, D Cyr25, S DaRonco7, S D'Auria34, M D'onofrio35, D Dagenhart30, P de Barbaro31, S De Cecco45, A Deisher18, G De Lentdecker31, M Dell'Orso10, S Demers31, L Demortier28, J Deng26, M Deninno36, D De Pedis45, P F Derwent6, C Dionisi45, J Dittmann46, P DiTuro9, C Dörr47, A Dominguez18, S Donati10, M Donega35, P Dong16, J Donini7, T Dorigo7, S Dube9, K Ebina14, J Efron48, J Ehlers35, R Erbacher21, D Errede1, S Errede1, R Eusebi31, H C Fang18, S Farrington27, I Fedorko10, W T Fedorko3, R G Feild49, M Feindt47, J P Fernandez19, R Field2, G Flanagan33, L R Flores-Castillo32, A Foland41, S Forrester21, G W Foster6, M Franklin41, J C Freeman18, Y Fujii50, I Furic3, A Gajjar27, M Gallinaro28, J Galyardt42, J E Garcia10, M Garcia Sciverez18, A F Garfinkel19, C Gay49, H Gerberich1, E Gerchtein42, D Gerdes8, S Giagu45, P Giannetti10, A Gibson18, K Gibson42, C Ginsburg6, K Giolo19, M Giordani24, M Giunta10, G Giurgiu42, V Glagolev15, D Glenzinski6, M Gold51, N Goldschmidt8, J Goldstein17, G Gomez44, G Gomez-Ceballos44, M Goncharov52, O González19, I Gorelov51, A T Goshaw26, Y Gotra32, K Goulianos28, A Gresele7, M Griffiths27, S Grinstein41, C Grosso-Pilcher3, U Grundler1, J Guimaraes da Costa41, C Haber18, S R Hahn6, K Hahn53, E Halkiadakis31, A Hamilton12,13, B-Y Han31, R Handler25, F Happacher43, K Hara5, M Hare54, S Harper17, R F Harr55, R M Harris6, K Hatakeyama28, J Hauser16, C Hays26, H Hayward27, A Heijboer53, B Heinemann27, J Heinrich53, M Hennecke47, M Herndon25, J Heuser47, D Hidas26, C S Hill4, D Hirschbuehl47, A Hocker6, A Holloway41, S Hou11, M Houlden27, S-C Hsu56, B T Huffman17, R E Hughes48, J Huston33, K Ikado14, J Incandela4, G Introzzi10, M Iori45, Y Ishizawa5, A Ivanov21, B Iyutin23, E James6, D Jang9, B Jayatilaka8, D Jeans45, H Jensen6, E J Jeon38,39,40, M Jones19, K K Joo38,39,40, S Y Jun42, T R Junk1, T Kamon52, J Kang8, M Karagoz-Unel57, P E Karchin55, Y Kato58, Y Kemp47, R Kephart6, U Kerzel47, V Khotilovich52, B Kilminster48, D H Kim38,39,40, H S Kim38,39,40, J E Kim38,39,40, M J Kim42, M S Kim38,39,40, S B Kim38,39,40, S H Kim5, Y K Kim3, M Kirby26, L Kirsch30, S Klimenko2, M Klute23, B Knuteson23, B R Ko26, H Kobayashi5, K Kondo14, D J Kong38,39,40, J Konigsberg2, A Korytov2, A V Kotwal26, A Kovalev53, J Kraus1, I Kravchenko23, M Kreps47, A Kreymer6, J Kroll53, N Krumnack46, M Kruse26, V Krutelyov52, S E Kuhlmann29, Y Kusakabe14, S Kwang3, A T Laasanen19, S Lai12,13, S Lami28, S Lami28, S Lammel6, M Lancaster22, R L Lander21, K Lannon48, A Lath9, G Latino10, I Lazzizzera7, C Lecci47, T LeCompte29, J Lee31, J Lee31, S W Lee52, R Lefèvre37, N Leonardo23, S Leone10, S Levy3, J D Lewis6, K Li49, C Lin49, C S Lin6, M Lindgren6, E Lipeles56, T M Liss1, A Lister35, D O Litvintsev6, T Liu6, Y Liu35, N S Lockyer53, A Loginov59, M Loreti7, P Loverre45, R-S Lu11, D Lucchesi7, P Lujan18, P Lukens6, G Lungu2, L Lyons17, J Lys18, R Lysak11, E Lytken19, P Mack47, D MacQueen12,13, R Madrak6, K Maeshima6, P Maksimovic20, G Manca27, F Margaroli36, R Marginean6, C Marino1, A Martin49, M Martin20, V Martin57, M Martínez37, T Maruyama5, H Matsunaga5, M E Mattson55, R Mazini12,13, P Mazzanti36, K S McFarland31, D McGivern22, P McIntyre52, P McNamara9, R McNulty27, A Mehta27, S Menzemer23, A Menzione10, P Merkel19, C Mesropian28, A Messina45, M von der Mey16, T Miao6, N Miladinovic30, J Miles23, R Miller33, J S Miller8, C Mills4, M Milnik47, R Miquel18, S Miscetti43, G Mitselmakher2, A Miyamoto50, N Moggi36, B Mohr16, R Moore6, M Morello10, P Movilla Fernandez18, J Mülmenstädt18, A Mukherjee6, M Mulhearn23, Th Muller47, R Mumford20, P Murat6, J Nachtman6, S Nahn49, I Nakano60, A Napier54, D Naumov51, V Necula2, C Neu53, M S Neubauer56, J Nielsen18, T Nigmanov32, L Nodulman29, O Norniella37, T Ogawa14, S H Oh26, Y D Oh38,39,40, T Okusawa58, R Oldeman27, R Orava61, K Osterberg61, C Pagliarone10, E Palencia44, R Paoletti10, V Papadimitriou6, A Papikonomou47, A A Paramonov3, B Parks48, S Pashapour12,13, J Patrick6, G Pauletta24, M Paulini42, C Paus23, D E Pellett21, A Penzo24, T J Phillips26, G Piacentino10, J Piedra44, K Pitts1, C Plager16, L Pondrom25, G Pope32, X Portell37, O Poukhov15, N Pounder17, F Prakoshyn15, A Pronko6, J Proudfoot29, F Ptohos43, G Punzi10, J Pursley20, J Rademacker17, A Rahaman32, A Rakitin23, S Rappoccio41, F Ratnikov9, B Reisert6, V Rekovic51, N van Remortel61, P Renton17, M Rescigno45, S Richter47, F Rimondi36, K Rinnert47, L Ristori10, W J Robertson26, A Robson34, T Rodrigo44, E Rogers1, S Rolli54, R Roser6, M Rossi24, R Rossin2, C Rott19, A Ruiz44, J Russ42, V Rusu3, D Ryan54, H Saarikko61, S Sabik12,13, A Safonov21, W K Sakumoto31, G Salamanna45, O Salto37, D Saltzberg16, C Sanchez37, L Santi24, S Sarkar45, K Sato5, P Savard12,13, A Savoy-Navarro6, T Scheidle47, P Schlabach6, E E Schmidt6, M P Schmidt49, M Schmitt57, T Schwarz8, L Scodellaro44, A L Scott4, A Scribano10, F Scuri10, A Sedov19, S Seidel51, Y Seiya58, A Semenov15, F Semeria36, L Sexton-Kennedy6, I Sfiligoi43, M D Shapiro18, T Shears27, P F Shepard32, D Sherman41, M Shimojima5, M Shochet3, Y Shon25, I Shreyber59, A Sidoti10, P Sinervo12,13, A Sisakyan15, J Sjolin17, A Skiba47, A J Slaughter6, K Sliwa54, D Smirnov51, J R Smith21, F D Snider6, R Snihur12,13, M Soderberg8, A Soha21, S Somalwar9, V Sorin33, J Spalding6, F Spinella10, P Squillacioti10, M Stanitzki49, A Staveris-Polykalas10, R St Denis34, B Stelzer16, O Stelzer-Chilton12,13, D Stentz57, J Strologas51, D Stuart4, J S Suh38,39,40, A Sukhanov2, K Sumorok23, H Sun54, T Suzuki5, A Taffard1, R Tafirout12,13, R Takashima60, Y Takeuchi5, K Takikawa5, M Tanaka29, R Tanaka60, M Tecchio8, P K Teng11, K Terashi28, S Tether23, J Thom6, A S Thompson34, E Thomson53, P Tipton31, V Tiwari42, S Tkaczyk6, D Toback52, K Tollefson33, T Tomura5, D Tonelli10, M Tönnesmann33, S Torre10, D Torretta6, S Tourneur6, W Trischuk12,13, R Tsuchiya14, S Tsuno60, N Turini10, F Ukegawa5, T Unverhau34, S Uozumi5, D Usynin53, L Vacavant18, A Vaiciulis31, S Vallecorsa35, A Varganov8, E Vataga51, G Velev6, G Veramendi1, V Veszpremi19, T Vickey1, R Vidal6, I Vila44, R Vilar44, I Vollrath12,13, I Volobouev18, F Würthwein56, P Wagner52, R G Wagner29, R L Wagner6, W Wagner47, R Wallny16, T Walter47, Z Wan9, M J Wang11, S M Wang2, A Warburton12,13, B Ward34, S Waschke34, D Waters22, T Watts9, M Weber18, W C Wester III6, B Whitehouse54, D Whiteson53, A B Wicklund29, E Wicklund6, H H Williams53, P Wilson6, B L Winer48, P Wittich53, S Wolbers6, C Wolfe3, S Worm9, T Wright8, X Wu35, S M Wynne27, A Yagil6, K Yamamoto58, J Yamaoka9, Y Yamashita60, C Yang49, U K Yang3, W M Yao18, G P Yeh6, J Yoh6, K Yorita3, T Yoshida58, I Yu38,39,40, S S Yu53, J C Yun6, L Zanello45, A Zanetti24, I Zaw41, F Zetti10, X Zhang1, J Zhou9 and S Zucchelli36 (CDF Collaboration)

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We report the first measurements of inclusive W and Z boson cross-sections times the corresponding leptonic branching ratios for p\overline{p} collisions at \sqrt{s} = 1.96 TeV based on the decays of the W and Z bosons into electrons and muons. The data were recorded with the CDF II detector at the Fermilab Tevatron and correspond to an integrated luminosity of 72.0 ± 4.3 pb−1. We test e-μ lepton universality in W decays by measuring the ratio of the W → μν to Weν cross sections and determine a value of 0.991 ± 0.004(stat.) ± 0.011(syst.) for the ratio of W − ℓ − ν couplings (gμ/ge). Since there is no sign of non-universality, we combine our cross-section measurements in the different lepton decay modes and obtain \sigma_{W} \times\, {\rm Br} (\ppbar \rightarrow W \rightarrow \ell \nu) = 2.749 \pm 0.010({\rm stat.}) \,\pm\, 0.053({\rm syst.}) \,\pm\, 0.165({\rm lum.}) nb and \sigma_{\gamma^{*}/Z} \times\, {\rm Br} (\ppbar \rightarrow \gamma^{*}/Z \rightarrow \ell \ell) = 254.9 \,\pm\, 3.3({\rm stat.}) \,\pm\, 4.6({\rm syst.}) \pm 15.2({\rm lum.}) pb for dilepton pairs in the mass range between 66 GeV/c2 and 116 GeV/c2. We compute the ratio R of the W → ℓν to Z → ℓℓ cross sections taking all correlations among channels into account and obtain R = 10.84 ± 0.15(stat.) ± 0.14(syst.) including a correction for the virtual photon exchange component in our measured γ*/Z → ℓℓ cross section. Based on the measured value of R, we extract values for the W leptonic branching ratio, Br(W → ℓν)= 0.1082 ± 0.0022; the total width of the W boson, Γ(W)= 2092 ± 42 MeV; and the ratio of W and Z boson total widths, Γ(W)/Γ(Z)= 0.838 ± 0.017. In addition, we use our extracted value of Γ(W) whose value depends on various electroweak parameters and certain CKM matrix elements to constrain the Vcs CKM matrix element, |Vcs| = 0.976 ± 0.030.


PACS

13.85.Qk Inclusive production with identified leptons, photons, or other nonhadronic particles

11.30.Er Charge conjugation, parity, time reversal, and other discrete symmetries

14.70.Hp Z bosons

13.38.Be Decays of W bosons

12.15.-y Electroweak interactions

14.70.Fm W bosons

Subjects

Particle physics and field theory

Dates

Issue 12 (December 2007)

Received 28 August 2007

Published 5 November 2007



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