The UA2 experiment has collected large samples of W and Z events during recent runs at the CERN pp Collider at s = 630 GeV. These samples have been used to perform precise measurements of the masses of the W and Z bosons. After a careful analysis of systematic errors, an improved result is obtained for the mass ratio mwmz. This provides a new value for the weak mixing parameter sin2θw. Furthermore, it can be combined with recent measurements of the Z mass from e+e- colliders to give an absolute measurement of the W mass, leading to the result mw=80.49±0.43 (stat) ± 0.24 (syst) GeV.
A PRECISE DETERMINATION OF THE W-MASS AND Z-MASS AT THE CERN PBARP COLLIDER / J. ALITTI, R. ANSARI, R. ANSORGE, D. AUTIERO, P. BAGNAIA, P. BAREYRE, G. BLAYLOCK, P. BONAMY, M. BONESINI, C. BOOTH, K. BORER, D. BUSKULIC, G. CARBONI, D. CAVALLI, V. CAVASINNI, P. CENCI, J. CHOLLET, A. CLARK, C. CONTA, G. COSTA, F. COSTANTINI, J. CRITTENDEN, A. DELLACQUA, B. DELOTTO, T. DELPRETE, R. DEWOLF, L. DILELLA, G. EGAN, K. EINSWEILER, L. FAYARD, A. FEDERSPIEL, R. FERRARI, M. FRATERNALI, D. FROIDEVAUX, G. FUMAGALLI, J. GAILLARD, F. GIANOTTI, O. GILDEMEISTER, C. GOSSLING, V. GOGGI, S. GRUNENDAHL, J. HANSEN, K. HARA, S. HELLMAN, E. HUGENTOBLER, K. HULTQVIST, E. IACOPINI, J. INCANDELA, K. JAKOBS, P. JENNI, E. KLUGE, N. KURZ, S. LAMI, P. LARICCIA, M. LEFEBVRE, L. LINSSEN, M. LIVAN, P. LUBRANO, C. MAGNEVILLE, L. MANDELLI, L. MAPELLI, M. MAZZANTI, K. MEIER, B. MERKEL, J. MEYER, M. MONIEZ, R. MONING, M. MORGANTI, L. MULLER, D. MUNDAY, C. ONIONS, T. PAL, M. PARKER, G. PARROUR, F. PASTORE, E. PENNACCHIO, J. PENTNEY, M. PEPE, L. PERINI, C. PETRIDOU, P. PETROFF, H. PLOTHOWBESCH, G. POLESELLO, A. POPPLETON, M. PRIMAVERA, L. RASMUSSEN, J. REPELLIN, A. RIMOLDI, J. RUSHBROOKE, P. SCAMPOLI, J. SCHACHER, S. SINGH, S. STAPNES, A. STIRLING, S. TOVEY, G. UNAL, M. VALDATANAPPI, V. VERCESI, A. WEIDBERG, P. WELLS, T. WHITE, D. WOOD, S. WOTTON, H. ZACCONE. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 241:1(1990), pp. 150-164.
A PRECISE DETERMINATION OF THE W-MASS AND Z-MASS AT THE CERN PBARP COLLIDER
L. PERINI;
1990
Abstract
The UA2 experiment has collected large samples of W and Z events during recent runs at the CERN pp Collider at s = 630 GeV. These samples have been used to perform precise measurements of the masses of the W and Z bosons. After a careful analysis of systematic errors, an improved result is obtained for the mass ratio mwmz. This provides a new value for the weak mixing parameter sin2θw. Furthermore, it can be combined with recent measurements of the Z mass from e+e- colliders to give an absolute measurement of the W mass, leading to the result mw=80.49±0.43 (stat) ± 0.24 (syst) GeV.
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