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13 lines
628 B
13 lines
628 B
\midheading{$Z+b{\bar b}$ production ($m_b=0$), processes 51--53}
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\label{subsec:zbbmassless}
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Process {\tt 51} is identical to {\tt 50} except for the fact
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that the bottom quark mass is neglected. This allows the calculation to be
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performed up to NLO. The other processes {\tt 52} and {\tt 53},also with massless $b$-quarks
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account for the decays into
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neutrinos ({\tt nproc=52}) and bottom quarks ({\tt nproc=53}). Note that
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the NLO calculation of process {\tt 53} does not currently
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include radiation from the
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bottom quarks produced in the decay.
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When {\tt removebr} is true in process {\tt 51}, the $Z$ boson does not decay.
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