RapidSim: an application for the fast simulation of heavy-quark hadron decays

Abstract

RapidSim is a lightweight application for the fast simulation of phase space decays of beauty and charm quark hadrons, allowing for quick studies of the properties of signal and background decays in particle physics analyses. Based upon the TGenPhaseSpace class from the ROOT application it uses externally provided fixed-order next-to-leading-logarithm calculations to boost the initial beauty and charm hadrons to the appropriate energy for the production environment of interest. User-defined momentum resolution functions can be used to mimic the effect of imperfect track reconstruction. User-defined efficiency shapes can be applied during generation to reproduce the effects of geometric and kinematic requirements on final state particles as well as the dynamics of the decay. The effect of mis-identification of the final state particles is simple to configure via configuration files, while the framework can easily be extended to include additional particle types. This paper describes the RapidSim framework, features and some example use cases.

15 pages, 8 figures. Updated to include DOI reference

Cited by in corpus (44)

• Observation of $CP$ violation in charm decays
• Precision measurement of the ${\Xi }_{cc}^{++}$ mass
• Observation of charge-parity symmetry breaking in baryon decays
• Observation of excited ${\Omega }_c^0$ baryons in ${\Omega }_b^{-}\to {\Xi }_c^{+}{K}^{-}{\pi }^{-}$ decays
• Measurement of $CP$ observables in $B^{\pm }\to D^{(\ast )}{K}^{\pm }$ and $B^{\pm }\to D^{(\ast )}{\pi }^{\pm }$ decays
• Measurement of the time-integrated $CP$ asymmetry in $D^0\to K^{-}{K}^{+}$ decays
• Observation of the doubly charmed baryon decay ${\Xi }_{cc}^{++}\to {\Xi }_c^{{}^{\prime }+}{\pi }^{+}$
• Observation of new ${\Omega }_c^0$ states decaying to the ${\Xi }_c^{+}{K}^{-}$ final state
• Measurement of $CP$ observables in $B^{\pm }\to D^{(\ast )}{K}^{\pm }$ and $B^{\pm }\to D^{(\ast )}{\pi }^{\pm }$ decays using two-body $D$ final states
• LHCb potential to discover long-lived new physics particles with lifetimes above 100 ps
• Measurement of the charm mixing parameter $y_{CP}-y_{CP}^{K\pi }$ using two-body $D^0$ meson decays
• CP violation and material interaction of neutral kaons in measurements of the CKM angle $\gamma$ using $B^{\pm }\to D{K}^{\pm }$ decays where $D\to K_{\text{S}}^0{\pi }^{+}{\pi }^{-}$
• Measurement of $CP$ asymmetries in ${\Lambda }_b^0\to p{h}^{-}$ decays
• Precision measurement of $CP$ violation in the penguin-mediated decay $B_s^0\to \varphi \varphi$
• Observation of the doubly-charmed-baryon decay ${\Xi }_{cc}^{++}\to {\Xi }_c^0{\pi }^{+}{\pi }^{+}$
• First determination of the spin-parity of ${\Xi }_c(3055{)}^{+,0}$ baryons
• Isospin extrapolation as a method to study inclusive $\bar{B}\to X_s{\ell }^{+}{\ell }^{-}$ decays
• First observation of the ${\Lambda }_b^0\to D^{+}{D}^{-}\Lambda$ decay
• Observation of ${\Lambda }_b^0\to {\Lambda }_c^{+}{\bar{D}}^{(\ast )0}{K}^{-}$ and ${\Lambda }_b^0\to {\Lambda }_c^{+}{D}_s^{\ast -}$ decays
• Observation of a new charmed baryon decaying to ${\Xi }_c^{+}{\pi }^{-}{\pi }^{+}$
• Search for the lepton-flavor violating decay $B_s^0\to \varphi {\mu }^{\pm }{\tau }^{\mp }$
• Oscillations of $B_s^0$ mesons as a probe of decays with unreconstructed particles
• A search for rare $B\to D{\mu }^{+}{\mu }^{-}$ decays
• Measurement of $CP$ violation observables in $D^{+}\to K^{-}{K}^{+}{\pi }^{+}$ decays
• Observation of the $B^0\to {\overline{D}}^{\ast 0}{K}^{+}{\pi }^{-}$ and $B_s^0\to {\overline{D}}^{\ast 0}{K}^{-}{\pi }^{+}$ decays
• Search for heavy neutral leptons in B-meson decays
• Measurement of the ${\Omega }_c^0$ and ${\Xi }_c^0$ baryon lifetimes using hadronic $b$-baryon decays
• Measurement of the CKM angle $\gamma$ in $B^{\pm }\to D{K}^{\ast }(892{)}^{\pm }$ decays
• Observation of muonic Dalitz decays of ${\chi }_b$ mesons and precise spectroscopy of hidden-beauty states
• Study of $CP$ violation in $B_{(s)}^0\to D{K}^{\ast }(892{)}^0$ decays with $D\to K\pi (\pi \pi )$, $\pi \pi (\pi \pi )$, and $KK$ final states
• A measurement of $\Delta {\Gamma }_s$
• Tracking of charged particles with nanosecond lifetimes at LHCb
• Search for the decay $B^0\to \varphi \varphi$
• Observation of the $B_s^0\to D^{\ast +}{D}^{\ast -}$ decay
• Improving systematic uncertainties on precision two-body mass measurements
• Measurement of the branching fractions and longitudinal polarisations of $B_{(s)}^0\to K^{\ast 0}\overline{K}{}^{\ast 0}$ decays
• A model-independent measurement of the CKM angle $\gamma$ in partially reconstructed $B^{\pm }\to D^{\ast }{h}^{\pm }$ decays with $D\to K_S^0{h}^{+}{h}^{-}$ $(h=\pi ,K)$
• Measurement of the CKM angle $\gamma$ using the $B^{\pm }\to D^{\ast }{h}^{\pm }$ channels
• Evidence for the decays $B^0\to {\bar{D}}^{(\ast )0}\varphi$ and updated measurements of the branching fractions of the $B_s^0\to {\bar{D}}^{(\ast )0}\varphi$ decays
• Joint LHCb--Belle II Prospects to Constrain New Physics in $B\to D^{(\ast )}\tau \nu$
• Towards replacing detector simulation with heterogeneous GNNs in flavour physics analyses
• Study of $b$-hadron decays to ${\Lambda }_c^{+}{h}^{-}{h}^{\prime -}$ final states
• Measurement of ${\tau }_L$ using the $B_s^0\to J/\psi \eta$ decay mode
• Precision measurement of the ${\Xi }_b^0$ baryon lifetime