$Z b \bar{b}$ production, processes 50, 51-53 ( $m_b=0$ )¶

Reference Campbell:2000bg{.interpreted-text role=”cite”}

These processes represent the production of a Z boson (or virtual photon) which subsequently decays leptonically, in association with a bb̄ pair. The eﬀect of the bottom quark mass is included throughout the calculation. The calculation may be performed at LO only.

When removebr is true, the Z boson does not decay.

Process 51 is identical to 50 except for the fact that the bottom quark mass is neglected. This allows the calculation to be performed up to NLO. The other processes account for the decays into neutrinos (nproc=52) and bottom quarks (nproc=53). Note that the NLO calculation of process 53 does not currently include radiation from the bottom quarks produced in the decay.

When removebr is true in process 51, the Z boson does not decay.

Z b \bar{b}Z b \bar{b} production, processes 50, 51-53 (m_b=0m_b=0)¶

$Z b \bar{b}$ production, processes 50, 51-53 ( $m_b=0$ )¶