MEASUREMENT OF THE W-BOSON MASS AND W- PRODUCTION AND DECAY PROPERTIES IN E(+)E(-) COLLISIONS AT ROOT-S = 172 GEV(W)

Authors
ACKERSTAFF K ALEXANDER G ALLISON J ALTEKAMP N ANDERSON KJ ANDERSON S ARCELLI S ASAI S AXEN D AZUELOS G BALL AH BARBERIO E BARLOW RJ BARTOLDUS R BATLEY JR BAUMANN S BECHTLUFT J BEESTON C BEHNKE T BELL AN BELL KW BELLA G BENTVELSEN S BETHKE S BIEBEL O BIGUZZI A BIRD SD BLOBEL V BLOODWORTH IJ BLOOMER JE BOBINSKI M BOCK P BONACORSI D BOUTEMEUR M BOUWENS BT BRAIBANT S BRIGLIADORI L BROWN RM BURCKHART HJ BURGARD C BURGIN R CAPILUPPI P CARNEGIE RK CARTER AA CARTER JR CHANG CY CHARLTON DG CHRISMAN D CLARKE PEL COHEN I CONBOY JE COOKE OC CUFFIANI M DADO S DALLAPICCOLA C DALLAVALLE GM DAVIS R DEJONG S DELPOZO LA DESCH K DIENES B DIXIT MS SILVA EDE DOUCET M DUCHOVNI E DUCKECK G DUERDOTH IP EATOUGH D EDWARDS JEG ESTABROOKS PG EVANS HG EVANS M FABBRI F FANTI M FAUST AA FIEDLER F FIERRO M FISCHER HM FLECK I FOLMAN R FONG DG FOUCHER M FURTJES A FUTYAN DI GAGNON P GARY JW GASCON J GASCONSHOTKIN SM GEDDES NI GEICHGIMBEL C GERALIS T GIACOMELLI G GIACOMELLI P GIACOMELLI R GIBSON V GIBSON WR GINGRICH DM GLENZINSKI D GOLDBERG J GOODRICK MJ GORN W GRANDI C GROSS E GRUNHAUS J GRUWE M HAJDU C HANSON GG HANSROUL M HAPKE M HARGROVE CK HART PA HARTMANN C HAUSCHILD M HAWKES CM HAWKINGS R HEMINGWAY RJ HERNDON M HERTEN G HEUER RD HILDRETH MD HILL JC HILLIER SJ HOBSON PR HOMER RJ HONMA AK HORVATH D HOSSAIN KR HOWARD R HUNTEMEYER P HUTCHCROFT DE IGOKEMENES P IMRIE DC INGRAM MR ISHII K JAWAHERY A JEFFREYS PW JEREMIE H JIMACK M JOLY A JONES CR JONES G JONES M JOST U JOVANOVIC P JUNK TR KARLEN D KARTVELISHVILI V KAWAGOE K KAWAMOTO T KAYAL PI KEELER RK KELLOGG RG KENNEDY BW KIRK J KLIER A KLUTH S KOBAYASHI T KOBEL M KOETKE DS KOKOTT TP KOLREP M KOMAMIYA S KRESS T KRIEGER P VONKROGH J KYBERD P LAFFERTY GD LAHMANN R LAI WP LANSKE D LAUBER J LAUTENSCHLAGER SR LAYTER JG LAZIC D LEE AM LEFEBVRE E LELLOUCH D LETTS J LEVINSON L LLOYD SL LOEBINGER FK LONG GD LUSTY MJ LUDWIG J MACCHIOLO A MACPHERSON A MANNELLI M MARCELLINI S MARKUS C MARTIN AJ MARTINEZ G MASHIMO T MATTIG P MCDONALD WJ MCKENNA J MCKIGNEY EA MCMAHON TJ MCPHERSON RA MEIJERS F MENKE S MERRITT FS MES H MEYER J MICHELINI A MIKENBERG G MILLER DJ MINCER A MIR R MOHR W MONTANARI A MORI T MORII M MULLER U MIHARA S NAGAI K NAKAMURA I NEAL HA NELLEN B NISIUS R ONEALE ST OAKHAM FG ODORICI F OGREN HO OH A OLDERSHAW NJ OREGLIA MJ ORITO S PALINKAS J PASZTOR G PATER JR PATRICK GN PATT J PEARCE MJ PEREZOCHOA R PETZOLD S PFEIFENSCHNEIDER P PILCHER JE PINFOLD J PLANE DE POFFENBERGER P POLI B POSTHAUS A REES DL RIGBY D ROBERTSON S ROBINS SA RODNING N RONEY JM ROOKE A ROS E ROSSI AM ROUTENBURG P ROZEN Y RUNGE K RUNOLFSSON O RUPPEL U RUST DR RYLKO R SACHS K SAEKI T SARKISYAN EKG SBARRA C SCHAILE AD SCHAILE O SCHARF F SCHARFFHANSEN P SCHENK P SCHIECK J SCHLEPER P SCHMITT B SCHMITT S SCHONING A SCHRODER M SCHULTCOULON HC SCHUMACHER M SCHWICK C SCOTT WG SHEARS TG SHEN BC SHEPHERDTHEMISTOCLEOUS CH SHERWOOD P SIROLI GP SITTLER A SKILLMAN A SKUJA A SMITH AM SNOW GA SOBIE R SOLDNERREMBOLD S SPRINGER RW SPROSTON M STEPHENS K STEUERER J STOCKHAUSEN B STOLL K STROM D SZYMANSKI P TAFIROUT R TALBOT SD TANAKA S TARAS P TAREM S TEUSCHER R THIERGEN M THOMSON MA VONTORNE E TOWERS S TRIGGER I TROCSANYI Z TSUR E TURCOT AS TURNERWATSON MF UTZAT P VANKOOTEN R VERZOCCHI M VIKAS P VOKURKA EH VOSS H WACKERLE F WAGNER A WARD CP WARD DR WATKINS PM WATSON AT WATSON NK WELLS PS WERMES N WHITE JS WILKENS B WILSON GW WILSON JA WOLF G WYATT TR YAMASHITA S YEKUTIELI G ZACEK V ZERZION D
Citation
K. Ackerstaff et al., MEASUREMENT OF THE W-BOSON MASS AND W- PRODUCTION AND DECAY PROPERTIES IN E(+)E(-) COLLISIONS AT ROOT-S = 172 GEV(W), EUROPEAN PHYSICAL JOURNAL C-PARTICLES AND FIELDS, 1(3-4), 1998, pp. 395-424
Citations number
64
Categorie Soggetti
Physics, Particles & Fields
Journal title
EUROPEAN PHYSICAL JOURNAL C-PARTICLES AND FIELDS → ACNP
ISSN journal
14346044
Volume
1
Issue
3-4
Year of publication
1998
Pages
395 - 424
Database
ISI
SICI code
1434-6044(1998)1:3-4<395:MOTWMA>2.0.ZU;2-0
Abstract
This paper describes the measurement of the W boson mass. M-W, and dec ay width, Gamma(W), from the direct reconstruction of the invariant ma ss of its decay products in W pair events collected at a mean centre-o f-mass energy of root s=172.12 GeV with the OPAL detector at LEP, Meas urements of the W pair production cross-section. the W decay branching fractions and properties of the W decay final states are also describ ed. A total of 120 candidate W+W- events has been selected for an inte grated luminosity of 10.36 pb(-1). The W+W- production cross-section i s measured to be sigma(WW) = 12.3+/-1.3(stat.)+/-0.3(syst.) pb. consis tent with the Standard model expectation. The W+W- --> q (q) over bar l (v) over bar(l) and W+W- --> q (q) over bar q (q) over bar final sta tes are used to obtain a direct measurement of Gamma(W) = 1.30(-0.55)( +0.70)(stat.) +/- 0.18(syst.) GeV. Assuming the Standard Model relatio n between M-W and Gamma(W), the W boson mass is measured to be M-W = 8 0.32 +/- 0.30(stat.) +/- 0.09(syst.) GeV. The event properties of the fully-hadronic decays of W+W- events are compared to those of the semi leptonic decays. At the current level of precision there is no evidenc e for effects of colour reconnection in the observables studied, Combi ning data recorded by OPAL at root s similar to 161-172 GeV, the W bos on branching fraction to hadrons is determined to be 69.8(-3.2)(+3.0)( stat.) +/- 0.7(syst.)%, consistent with the prediction of the Standard Model. The combined mass measurement from direct reconstruction and f rom the W+W- production cross-sections measured at root s similar to 1 61 and root s similar to 172GeV is M-W = 80.35 +/- 0.24(stat.) +/- 0.0 7(syst.) GeV.