We report the first measurements of inclusive W and Z boson cross-sections times the corresponding leptonic branching ratios for pp collisions at root 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-mu lepton universality in W decays by measuring the ratio of the W -> mu nu to W -> e nu cross sections and determine a value of 0.991 +/- 0.004(stat.) +/- 0.011(syst.) for the ratio of W - l - nu couplings (g(mu)/g(e)). Since there is no sign of non-universality, we combine our cross-section measurements in the different lepton decay modes and obtain sigma(W) x Br(p (p) over bar -> W -> l nu) = 2.749 +/- 0.010(stat.) +/- 0.053(syst.) +/- 0.165(lum.) nb and sigma(gamma*/Z) x Br(p (p) over bar ->gamma*/Z -> ll) = 254.9 +/- 3.3( stat.) +/- 4.6( syst.) +/- 15.2(lum.) pb for dilepton pairs in the mass range between 66 GeV/c(2) and 116 GeV/c2. We compute the ratio R of the W -> l nu 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. gamma*/Z -> ll cross section. Based on the measured value of R, we extract values for the W leptonic branching ratio, Br(W -> l nu) = 0.1082 +/- 0.0022; the total width of the W boson, Gamma(W) = 2092 +/- 42 MeV; and the ratio of W and Z boson total widths, Gamma(W)/Gamma( Z) = 0.838 +/- 0.017. In addition, we use our extracted value of Gamma(W) whose value depends on various electroweak parameters and certain CKM matrix elements to constrain the V(cs) CKM matrix element, |V(cs)| = 0.976 +/- 0.030.
Measurements of inclusive W and Z cross sections in p(p)over-bar collisions at root s=1.96 TeV / Abulencia, A; Acosta, D; Adelman, J; Affolder, T; Akimoto, T; Albrow, Mg; Ambrose, D; Amerio, S; Amidei, D; Anastassov, A; Anikeev, K; Annovi, A; Antos, J; Aoki, M; Apollinari, G; Arguin, Jf; Arisawa, T; Artikov, A; Ashmanskas, W; Attal, A; Azfar, F; AZZI BACCHETTA, P; Azzurri, P; Bacchetta, N; Bachacou, H; Badgett, W; BARBARO GALTIERI, A; Barnes, Ve; Barnett, Ba; Baroiant, S; Bartsch, V; Bauer, G; Bedeschi, F; Behari, S; Belforte, S; Bellettini, G; Bellinger, J; Belloni, A; BEN HAIM, E; Benjamin, D; Beretvas, A; Beringer, J; Berry, T; Bhatti, A; Binkley, M; Bisello, D; Bishai, M; Blair, Re; Blocker, C; Bloom, K; Blumenfeld, B; Bocci, A; Bodek, A; Boisvert, V; Bolla, G; Bolshov, A; Bortoletto, D; Boudreau, J; Bourov, S; Boveia, A; Brau, B; Bromberg, C; Brubaker, E; Budagov, J; Budd, Hs; Budd, S; Burkett, K; Busetto, G; Bussey, P; Byrum, Kl; Cabrera, S; Campanelli, M; Campbell, M; Canelli, F; 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G, NUCLEAR AND PARTICLE PHYSICS. - ISSN 0954-3899. - 34:(2007), pp. 2457-2544. [10.1088/0954-3899/34/12/001]
Measurements of inclusive W and Z cross sections in p(p)over-bar collisions at root s=1.96 TeV
ABULENCIA A; ACOSTA D; ADELMAN J; AFFOLDER T; AKIMOTO T; ALBROW MG; AMBROSE D; AMERIO S; AMIDEI D; ANASTASSOV A; ANIKEEV K; ANNOVI A; ANTOS J; AOKI M; APOLLINARI G; ARGUIN JF; ARISAWA T; ARTIKOV A; ASHMANSKAS W; ATTAL A; AZFAR F; AZZI BACCHETTA P; AZZURRI P; BACCHETTA N; BACHACOU H; BADGETT W; BARBARO GALTIERI A; BARNES VE; BARNETT BA; BAROIANT S; BARTSCH V; BAUER G; BEDESCHI F; BEHARI S; BELFORTE S; BELLETTINI G; BELLINGER J; BELLONI A; BEN HAIM E; BENJAMIN D; BERETVAS A; BERINGER J; BERRY T; BHATTI A; BINKLEY M; BISELLO D; BISHAI M; BLAIR RE; BLOCKER C; BLOOM K; BLUMENFELD B; BOCCI A; BODEK A; BOISVERT V; BOLLA G; BOLSHOV A; BORTOLETTO D; BOUDREAU J; BOUROV S; BOVEIA A; BRAU B; BROMBERG C; BRUBAKER E; BUDAGOV J; BUDD HS; BUDD S; BURKETT K; BUSETTO G; BUSSEY P; BYRUM KL; CABRERA S; CAMPANELLI M; CAMPBELL M; CANELLI F; CANEPA A; CARLSMITH D; CAROSI R; CARRON S; CASARSA M; CASTRO A; CATASTINI P; CAUZ D; CAVALLI SFORZA M; CERRI A; CERRITO L; CHANG SH; CHAPMAN J; CHEN YC; CHERTOK M; CHIARELLI G; CHLACHIDZE G; CHLEBANA F; CHO I; CHO K; CHOKHELI D; CHOU JP; CHU PH; CHUANG SH; CHUNG K; CHUNG WH; CHUNG YS; CILJAK M; CIOBANU CI; CIOCCI MA; CLARK A; CLARK D; COCA M; CONNOLLY A; CONVERY ME; CONWAY J; COOPER B; COPIC K; CORDELLI M; CORTIANA G; CRUZ A; CUEVAS J; CULBERTSON R; CYR D; DARONCO S; D'AURIA S; D'ONOFRIO M; DAGENHART D; DE BARBARO P; DE CECCO, Sandro ;DEISHER A; DE LENTDECKER G; DELL'ORSO M; DEMERS S; DEMORTIER L; DENG J; DENINNO M; DE PEDIS D; DERWENT PF; DIONISI, Carlo ;DITTMANN J; DITURO P; DORR C; DOMINGUEZ A; DONATI S; DONEGA M; DONG P; DONINI J; DORIGO T; DUBE S; EBINA K; EFRON J; EHLERS J; ERBACHER R; ERREDE D; ERREDE S; EUSEBI R; FANG HC; FARRINGTON S; FEDORKO I; FEDORKO WT; FEILD RG; FEINDT M; FERNANDEZ JP; FIELD R; FLANAGAN G; FLORES CASTILLO LR; FOLAND A; FORRESTER S; FOSTER GW; FRANKLIN M; FREEMAN JC; FUJII Y; FURIC I; GAJJAR A; GALLINARO M; GALYARDT J; GARCIA JE; SCIVEREZ MG; GARFINKEL AF; GAY C; GERBERICH H; GERCHTEIN E; GERDES D; GIAGU, Stefano ;GIANNETTI P; GIBSON A; 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ROBSON A; RODRIGO T; ROGERS E; ROLLI S; ROSER R; ROSSI M; ROSSIN R; ROTT C; RUIZ A; RUSS J; RUSU V; RYAN D; SAARIKKO H; SABIK S; SAFONOV A; SAKUMOTO WK; SALAMANNA G; SALTO O; SALTZBERG D; SANCHEZ C; SANTI L; SARKAR S; SATO K; SAVARD P; SAVOY NAVARRO A; SCHEIDLE T; SCHLABACH P; SCHMIDT EE; SCHMIDT MP; SCHMITT M; SCHWARZ T; SCODELLARO L; SCOTT AL; SCRIBANO A; SCURI F; SEDOV A; SEIDEL S; SEIYA Y; SEMENOV A; SEMERIA F; SEXTON KENNEDY L; SFILIGOI I; SHAPIRO MD; SHEARS T; SHEPARD PF; SHERMAN D; SHIMOJIMA M; SHOCHET M; SHON Y; SHREYBER I; SIDOTI A; SINERVO P; SISAKYAN A; SJOLIN J; SKIBA A; SLAUGHTER AJ; SLIWA K; SMIRNOV D; SMITH JR; SNIDER FD; SNIHUR R; SODERBERG M; SOHA A; SOMALWAR S; SORIN V; SPALDING J; SPINELLA F; SQUILLACIOTI P; STANITZKI M; STAVERIS POLYKALAS A; DENIS R; STELZER B; STELZER CHILTON O; STENTZ D; STROLOGAS J; STUART D; SUH JS; SUKHANOV A; SUMOROK K; SUN H; SUZUKI T; TAFFARD A; TAFIROUT R; TAKASHIMA R; TAKEUCHI Y; TAKIKAWA K; TANAKA M; TANAKA R; TECCHIO M; TENG PK; TERASHI K; TETHER S; THOM J; THOMPSON AS; THOMSON E; TIPTON P; TIWARI V; TKACZYK S; TOBACK D; TOLLEFSON K; TOMURA T; TONELLI D; TONNESMANN M; TORRE S; TORRETTA D; TOURNEUR S; TRISCHUK W; TSUCHIYA R; TSUNO S; TURINI N; UKEGAWA F; UNVERHAU T; UOZUMI S; USYNIN D; VACAVANT L; VAICIULIS A; VALLECORSA S; VARGANOV A; VATAGA E; VELEV G; VERAMENDI G; VESZPREMI V; VICKEY T; VIDAL R; VILA I; VILAR R; VOLLRATH I; VOLOBOUEV I; WURTHWEIN F; WAGNER P; WAGNER RG; WAGNER RL; WAGNER W; WALLNY R; WALTER T; WAN Z; WANG MJ; WANG SM; WARBURTON A; WARD B; WASCHKE S; WATERS D; WATTS T; WEBER M; WESTER WC; WHITEHOUSE B; WHITESON D; WICKLUND AB; WICKLUND E; WILLIAMS HH; WILSON P; WINER BL; WITTICH P; WOLBERS S; WOLFE C; WORM S; WRIGHT T; WU X; WYNNE SM; YAGIL A; YAMAMOTO K; YAMAOKA J; YAMASHITA Y; YANG C; YANG UK; YAO WM; YEH GP; YOH J; YORITA K; YOSHIDA T; YU I; YU SS; YUN JC; ZANELLO L; ZANETTI A; ZAW I; ZETTI F; ZHANG X; ZHOU J; ZUCCHELLI S.
2007
Abstract
We report the first measurements of inclusive W and Z boson cross-sections times the corresponding leptonic branching ratios for pp collisions at root 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-mu lepton universality in W decays by measuring the ratio of the W -> mu nu to W -> e nu cross sections and determine a value of 0.991 +/- 0.004(stat.) +/- 0.011(syst.) for the ratio of W - l - nu couplings (g(mu)/g(e)). Since there is no sign of non-universality, we combine our cross-section measurements in the different lepton decay modes and obtain sigma(W) x Br(p (p) over bar -> W -> l nu) = 2.749 +/- 0.010(stat.) +/- 0.053(syst.) +/- 0.165(lum.) nb and sigma(gamma*/Z) x Br(p (p) over bar ->gamma*/Z -> ll) = 254.9 +/- 3.3( stat.) +/- 4.6( syst.) +/- 15.2(lum.) pb for dilepton pairs in the mass range between 66 GeV/c(2) and 116 GeV/c2. We compute the ratio R of the W -> l nu 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. gamma*/Z -> ll cross section. Based on the measured value of R, we extract values for the W leptonic branching ratio, Br(W -> l nu) = 0.1082 +/- 0.0022; the total width of the W boson, Gamma(W) = 2092 +/- 42 MeV; and the ratio of W and Z boson total widths, Gamma(W)/Gamma( Z) = 0.838 +/- 0.017. In addition, we use our extracted value of Gamma(W) whose value depends on various electroweak parameters and certain CKM matrix elements to constrain the V(cs) CKM matrix element, |V(cs)| = 0.976 +/- 0.030.
Citazione
Measurements of inclusive W and Z cross sections in p(p)over-bar collisions at root s=1.96 TeV / Abulencia, A; Acosta, D; Adelman, J; Affolder, T; Akimoto, T; Albrow, Mg; Ambrose, D; Amerio, S; Amidei, D; Anastassov, A; Anikeev, K; Annovi, A; Antos, J; Aoki, M; Apollinari, G; Arguin, Jf; Arisawa, T; Artikov, A; Ashmanskas, W; Attal, A; Azfar, F; AZZI BACCHETTA, P; Azzurri, P; Bacchetta, N; Bachacou, H; Badgett, W; BARBARO GALTIERI, A; Barnes, Ve; Barnett, Ba; Baroiant, S; Bartsch, V; Bauer, G; Bedeschi, F; Behari, S; Belforte, S; Bellettini, G; Bellinger, J; Belloni, A; BEN HAIM, E; Benjamin, D; Beretvas, A; Beringer, J; Berry, T; Bhatti, A; Binkley, M; Bisello, D; Bishai, M; Blair, Re; Blocker, C; Bloom, K; Blumenfeld, B; Bocci, A; Bodek, A; Boisvert, V; Bolla, G; Bolshov, A; Bortoletto, D; Boudreau, J; Bourov, S; Boveia, A; Brau, B; Bromberg, C; Brubaker, E; Budagov, J; Budd, Hs; Budd, S; Burkett, K; Busetto, G; Bussey, P; Byrum, Kl; Cabrera, S; Campanelli, M; Campbell, M; Canelli, F; 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