The meson $B_c$ annihilation to leptons and inclusive light hadrons

Abstract

The annihilation of the $B_c$ meson to leptons and inclusive light hadrons is analyzed in the framework of nonrelativistic QCD (NRQCD) factorization. We find that the decay mode, which escapes from the helicity suppression, contributes a sizable fraction width. According to the analysis, the branching ratio due to the contribution from the color-singlet component of the meson $B_c$ can be of order (10^{-2}). We also estimate the contributions from the color-octet components. With the velocity scaling rule of NRQCD, we find that the color-octet contributions are sizable too, especially, in certain phase space of the annihilation they are greater than (or comparative to) the color-singlet component. A few observables relevant to the spectrum of charged lepton are suggested, that may be used as measurements on the color-octet and color-singlet components in the future $B_c$ experiments. A typical long distance contribution in the annihilation is estimated too.

26 pages, 5 figures (6 eps-files), submitted to Phys. Rev. D

References in corpus (13)

• B_c Decays and Lifetime in QCD Sum Rules
• Using Heavy Quark Spin Symmetry in Semileptonic $B_c$ Decays
• Semileptonic and non-leptonic B_c decays
• Inclusive Decays of Heavy Quarkonium to Light Particles
• Decays of the $B_c$ Meson in a Relativistic Quark-Meson Model
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• The lifetime of B_c-meson and some relevant problems
• The Pure Leptonic Decays of B_c Meson and Their Radiative Corrections
• Semileptonic Decays of $B_c$ Meson to a P-Wave Charmonium State ${\chi }_c$ or $h_c$
• Study of the $B_c$-meson lifetime
• Exclusive Decay of $1^{--}$ Quarkonia and $B_c$ Meson into a Lepton Pair Combined with Two Pions
• Transverse $\tau$ polarization in $B_c\to \tau {\bar{\nu }}_{\tau }\gamma$ decay
• Radiative B_c -> tau nu_tau gamma decay

Cited by in corpus (13)

• BCVEGPY: An Event Generator for Hadronic Production of the B_c Meson
• BCVEGPY2.0: A upgrade version of the generator BCVEGPY with an addendum about hadroproduction of the $P$-wave $B_c$ states
• The Color-Octet Contributions to $P$-wave $B_c$ Meson Hadroproduction
• Hadronic production of the $P$-wave excited $B_c$-states ($B_{cJ,L=1}^{\ast }$)
• $B_c$ Meson Production around the $Z^0$ Peak at a High Luminosity $e^{+}{e}^{-}$ Collider
• Production of the $P$-Wave Excited $B_c$-States through the $Z^0$ Boson Decays
• Relativistic corrections to light-cone distribution amplitudes of S-wave $B_c$ mesons and heavy quarkonia
• Heavy Quarkonium Production at LHC through $W$ Boson Decays
• Radiative Leptonic $B_c\to \gamma \ell \bar{\nu }$ Decay in Effective Field Theory beyond Leading Order
• Heavy Quarkonium Production through the Semi-Exclusive $e^{+}{e}^{-}$ Annihilation Channels around the $Z^0$ Peak
• The leading twist light-cone distribution amplitudes for the S-wave and P-wave Bc mesons
• Production and decay of the meson $B_c$
• Exclusive production of $B_c$ mesons in $e^{+}{e}^{-}$ colliders