Frank Zimmermann edited Measurements at the WW threshold.tex  over 10 years ago

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\subsection{Measurements with OkuW}  With an integrated luminosity of more than $2\times 10^8$ W pairs produced at centre-of-mass energies at  the order of 1.6~$\inab$ per year WW threshold  and per experiment, above (hence the ``OkuW'' appelation), of which $2.5\times 10^7$ W pairs at $\sqrt{s} \sim 161$~GeV,  TLEP will be a W factory as well, with over $5 \times 10^7$ W's produced in a year (hence the ``OkuW'' appellation) at $\sqrt{s} \sim 161$~GeV. well.  Because the quantity of data expected at the WW production threshold is $10^5$ times larger than that produced at LEP, theamount of  measurements to be performed by TLEP at this centre-of-mass energy needs need  to be thoroughly reviewed by the starting design study. Here, only brief accounts of the W mass measurement, measurement and  the determination of the number of active neutrinos, and the neutrinos are given. A precise  measurement of the strong coupling constant, are given. For the latter, constant can also be done when  the large WW event samples expected at $\sqrt{s}=240$ and $350$~GeV(summing up to more than $2\times 10^8$ W pairs)  are exploited too. \subsubsection{The W mass}