BEEC: An event generator for simulating the $B_c$ meson production at an $e^{+}{e}^{-}$ collider

Abstract

The $B_c$ meson is a doubly heavy quark-antiquark bound state and carries flavors explicitly, which provides a fruitful laboratory for testing potential models and understanding the weak decay mechanisms for heavy flavors. In view of the prospects in $B_c$ physics at the hadronic colliders as Tevatron and LHC, $B_c$ physics is attracting more and more attention. It has been shown that a high luminosity $e^{+}{e}^{-}$ collider running around the $Z^0$-peak is also helpful for studying the properties of $B_c$ meson and has its own advantages. For the purpose, we write down an event generator for simulating $B_c$ meson production through $e^{+}{e}^{-}$ annihilation according to relevant publications. We name it as BEEC, in which the color-singlet $S$-wave and $P$-wave $(c\bar{b})$-quarkonium states together with the color-octet $S$-wave $(c\bar{b})$-quarkonium states can be generated. BEEC can also be adopted to generate the similar charmonium and bottomnium states via the semi-exclusive channels $e^{+}+e^{-}\to |(Q\bar{Q})[n]⟩+Q+\bar{Q}$ with $Q=b$ and $c$ respectively. To increase the simulation efficiency, we simplify the amplitude as compact as possible by using the improved trace technology. BEEC is a Fortran programme written in a PYTHIA-compatible format and is written in a modularization structure, one may apply it to various situations or experimental environments conveniently by using the GNU C compiler {\bf make}. A method to improve the efficiency of generating unweighted events within PYTHIA environment has been suggested. Moreover, BEEC will generate a standard Les Houches Event data file that contains useful information of the meson and its accompanying partons, which can be conveniently imported into PYTHIA to do further hadronization and decay simulation.

10 pages, 7 figures

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Cited by in corpus (9)

• The $B_c(B_c^{\ast })$ meson production via the proton-nucleus and the nucleus-nucleus collision modes at the colliders RHIC and LHC
• Photoproduction of the $B_c^{(\ast )}$ Meson at the LHeC
• NLO QCD corrections to $B_c$-pair production in photon-photon collision
• Next-to-leading order QCD corrections to the production of $B_c$ and $B_c^{\ast }$ through $W^{+}$-boson decays
• BCVEGPY and GENXICC for the hadronic production of the doubly heavy mesons and baryons
• P-wave excited $B_c^{\ast \ast }$ meson photoproduction at the LHeC
• Photoproduction of the $B_c$ meson at the future $e^{+}{e}^{-}$ colliders
• BEEC2.0: An Upgraded Version for the Production of Heavy Quarkonium at Electron-positron Collider
• Production of the $B_c$ meson at the CEPC