Experimental mass limit for a fourth-generation sequential lepton from e+e- annihilations at s=56 GeV
A search for pair production of fourth-generation sequential leptons in e+e- annihilation at a center-of-mass energy s=56 GeV is reported. Event topologies corresponding to the cases where one particle decays leptonically while the other decays hadronically as well as those where both particles decay hadronically were explored. We set a 95%-confidence-level lower limit of 27.6 GeV/c2 for the mass of a fourth-generation lepton. © 1988 The American Physical Society.
Publication Source (Journal or Book title)
Physical Review Letters
Kim, G., Kim, E., Son, D., Bacala, A., Imlay, R., Kirk, P., McNeil, R., Metcalf, W., Cheng, C., Mao, Z., Yan, Y., Xu, Y., Zhu, Y., Abashian, A., Gotow, K., Kajino, F., Low, E., Naito, F., Piilonen, L., Childers, R., Darden, C., Lusin, S., Rosenfeld, C., Wilson, S., Frautschi, M., Kagan, H., Kass, R., Trahern, C., Ko, W., Lander, R., Maeshima, K., Malchow, R., & Smith, J. (1988). Experimental mass limit for a fourth-generation sequential lepton from e+e- annihilations at s=56 GeV. Physical Review Letters, 61 (8), 911-914. https://doi.org/10.1103/PhysRevLett.61.911