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15 lines
791 B
15 lines
791 B
\midheading{$W+b{\bar b}$ production ($m_b=0$), processes 21,26}
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\label{subsec:wbbmassless}
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This process is calculable at leading LO and next-to-leading order NLO.
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These processes are identical to {\tt 20} and {\tt 25} except for the fact
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that the bottom quark mass is neglected.
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Processes {\tt nproc=20,25} with a massive $b$-quark should be used in preference.
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However processes {\tt nproc=21,26} run
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considerably faster than the corresponding processes with the mass
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for the $b$ quark, ({\tt nproc=20,25}).
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In circumstances where both $b$ quarks are at large
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transverse momentum, the inclusion of the mass for the $b$-quark is not mandatory
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and a good estimate of the cross section may be obtained by using these processes.
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When {\tt removebr} is true, the $W$ boson does not decay.
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