Publications [#332114] of Seog Oh

Papers Published

1. Ukegawa, F; Valls, J; Vejcik, S; Velev, G; Vidal, R; Vilar, R; Vologouev, I; Vucinic, D; Wagner, RG; Wagner, RL; Wahl, J; Wallace, NB; Walsh, AM; Wang, C; Wang, CH; Wang, MJ; Watanabe, T; Watts, T; Webb, R; Wenzel, H; Wester, WC; Wicklund, AB; Wicklund, E; Williams, HH; Wilson, P; Winer, BL, Measurement of the helicity of W bosons in top quark decays, Physical review letters, vol. 84 no. 2 (January, 2000), pp. 216-221, American Physical Society (APS) [doi]
   (last updated on 2026/01/20)

   Abstract:
   We use the transverse momentum spectrum of leptons in the decay chain t-->bW with W-->lnu to measure the helicity of the W bosons in the top quark rest frame. Our measurement uses a t&tmacr; sample isolated in 106+/-4 pb(-1) of data collected in p&pmacr; collisions at sqrt[s] = 1.8 TeV with the CDF detector at the Fermilab Tevatron. Assuming a standard V-A weak decay, we find that the fraction of W's with zero helicity in the top rest frame is F0 = 0.91+/-0. 37(stat)+/-0.13(syst), consistent with the standard model prediction of F0 = 0.70 for a top mass of 175 GeV/c(2).