

tau(boot)                                    R Documentation

_T_a_u _P_a_r_t_i_c_l_e _D_e_c_a_y _M_o_d_e_s

_A_r_g_u_m_e_n_t_s_:

    rate: The decay rate expressed as a percentage.

   decay: The type of decay measured in the experiment.  It
          is a factor with levels `1', `rho', `pi', `e' and
          `mu'.

_S_U_M_M_A_R_Y_:

     The `tau' data frame has 60 rows and 2 columns.

     The tau particle is a heavy electron-like particle dis-
     covered in the 1970's by Martin Perl at the Stanford
     Linear Accelerator Center.  Soon after its production
     the tau particle decays into various collections of
     more stable particles.  About 86% of the time the decay
     involves just one charged particle.  This rate has been
     measured independently 13 times.

     The one-charged-particle event is made up of four major
     modes of decay as well as a collection of other events.
     The four main types of decay are denoted rho, pi, e and
     mu.  These rates have been measured independently 6, 7,
     14 and 19 times respectively.  Due to physical con-
     straints each experiment can only estimate the compos-
     ite one-charged-particle decay rate or the rate of one
     of the major modes of decay.

     Each experiment consists of a major research project
     involving many years work.  One of the goals of the
     experiments was to estimate the rate of decay due to
     events other than the four main modes of decay.  These
     are uncertain events and so cannot themselves be
     observed directly.

_D_A_T_A _D_E_S_C_R_I_P_T_I_O_N_:

     This data frame contains the following columns:

_S_O_U_R_C_E_:

     The data were obtained from

     Efron, B. (1992) Jackknife-after-bootstrap standard
     errors and influence functions (with Discussion).
     Journal of the Royal Statistical Society, B, 54,
     83-127.

_O_T_H_E_R _R_E_F_E_R_E_N_C_E_S_:

     Davison, A.C. and Hinkley, D.V. (1997) Bootstrap Meth-
     ods and Their Application. Cambridge University Press.

     Hayes, K.G., Perl, M.L. and Efron, B. (1989) Applica-
     tion of the bootstrap statistical method to the tau-
     decay-mode problem.  Physical Review, D, 39, 274-279.

