Author: ARGUS Collaboration
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ISBN:
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Languages : en
Pages : 6
Book Description
Determination of the Michel Parameter in Tau Decay
Determination of the Michel parameter in tau decay
Determination of the Michel Parameters and the Tau Neutrino Helicity in Tau Decay
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Using the CLEO II detector at the e[sup+]e[sup -] storage ring CESR, we have determined the Michel parameters[rho], [zeta], and[delta] in[tau][sup[-+]][nu][bar[nu]] decay as well as the[tau] neutrino helicity parameter H[sub[nu][sub[tau]]] in[tau][sup[-+]][pi][sup 0][nu] decay. From a data sample of 3.02 x 10[sup 6][tau] pairs produced at[radical]s= 10.6 GeV, using events of the topology e[sup+]e[sup -][yields][tau][sup+][tau][sup -][yields] (l[sup[+-]][nu][bar[nu]])([pi][sup[-+]][pi][sup 0][nu]) and e[sup+]e[sup -][yields][tau][sup+][tau][sup -][yields] ([pi][sup[+-]][pi][sup 0][bar[nu]])([pi][sup[-+]][pi][sup 0][nu]), and the determined sign of h[sub[nu][sub[tau]]][1,2], the combined result of the three samples is:[rho]= 0.747[+-] 0.010[+-] 0.006, [zeta]= 1.007[+-] 0.040[+-] 0.015, [zeta][delta]= 0.745[+-]0.026[+-]0.009, and h[sub[nu][sub[tau]]]= -0.995[+-] 0.010[+-] 0.003. The results are in agreement with the Standard Model V-A interaction.
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Using the CLEO II detector at the e[sup+]e[sup -] storage ring CESR, we have determined the Michel parameters[rho], [zeta], and[delta] in[tau][sup[-+]][nu][bar[nu]] decay as well as the[tau] neutrino helicity parameter H[sub[nu][sub[tau]]] in[tau][sup[-+]][pi][sup 0][nu] decay. From a data sample of 3.02 x 10[sup 6][tau] pairs produced at[radical]s= 10.6 GeV, using events of the topology e[sup+]e[sup -][yields][tau][sup+][tau][sup -][yields] (l[sup[+-]][nu][bar[nu]])([pi][sup[-+]][pi][sup 0][nu]) and e[sup+]e[sup -][yields][tau][sup+][tau][sup -][yields] ([pi][sup[+-]][pi][sup 0][bar[nu]])([pi][sup[-+]][pi][sup 0][nu]), and the determined sign of h[sub[nu][sub[tau]]][1,2], the combined result of the three samples is:[rho]= 0.747[+-] 0.010[+-] 0.006, [zeta]= 1.007[+-] 0.040[+-] 0.015, [zeta][delta]= 0.745[+-]0.026[+-]0.009, and h[sub[nu][sub[tau]]]= -0.995[+-] 0.010[+-] 0.003. The results are in agreement with the Standard Model V-A interaction.