Inclusive $B_c$ Decays As A QCD Lab

Abstract

Phenomenological models of heavy flavour decays differ significantly in their predictions of global features of $B_c$ decays, like the $B_c$ lifetime or the relative weight of $c\ra s$ and $b\ra c$ transitions. The $1/m_Q$ expansion which is directly based on QCD allows predictions on the pattern to be expected, namely $\tau (B_c)$ to lie well below 1 psec with $c\ra s$ dominating over $b\ra c$ and a reduced semileptonic branching ratio. Due to interference effects one also predicts a lower charm content in the final states of $B_c$ decays than naively anticipated. The numerical aspect of the predictions, however, has to be viewed with considerable caution since one cannot expect the $1/m_c$ expansion to converge readily for $\Delta C=1$ transitions.

9 pages; LATEX, no figures; submitted for publication

Cited by in corpus (44)

• Observation of the B_c Meson in p-bar p Collisions at sqrt{s} = 1.8 TeV
• The lifetime of the $B_c^{-}$ meson and the anomalies in $B\to D^{(\ast )}\tau \nu$
• Observation of B_c Mesons in p-bar p Collisions at sqrt{s} = 1.8 TeV
• B_c Decays and Lifetime in QCD Sum Rules
• Semileptonic B_c-meson decays in sum rules of QCD and NRQCD
• Impact of polarization observables and $B_c\to \tau \nu$ on new physics explanations of the $b\to c\tau \nu$ anomaly
• Addendum to "Impact of polarization observables and $B_c\to \tau \nu$ on new physics explanations of the $b\to c\tau \nu$ anomaly"
• Prospects for the Bc Studies at LHCb
• Phenomenological prediction of the properties of the B_{C} system
• The B_c Meson Lifetime in the Light--Front Constituent Quark Model
• Mass spectra of doubly heavy Omega_QQ' baryons
• Unified Framework for $B$-Anomalies, Muon $g-2$, and Neutrino Masses
• Combined explanations of $(g-2{)}_{\mu }$, $R_{D^{(\ast )}}$, $R_{K^{(\ast )}}$ anomalies in a two-loop radiative neutrino mass model
• \large\bf $B_c\to (J/\Psi ,{\eta }_c)\tau \nu$ semileptonic decays within Standard model and beyond
• Decays of the Meson $B_c$ to a $P$-Wave Charmonium State ${\chi }_c$ or $h_c$
• The lifetime of B_c-meson and some relevant problems
• Lifetime of doubly charmed baryons
• Measurement of the $B_c^{+}$ meson lifetime using $B_c^{+}\to J/\psi {\mu }^{+}{\nu }_{\mu }X$ decays
• A Common Origin of Neutrino Masses and $R_{D^{(\ast )}}$, $R_{K^{(\ast )}}$ Anomalies
• Two-particle decays of B_c meson into charmonium states
• Standard Model prediction of the $B_c$ lifetime
• Model independent analysis of $b\to (c,u)\tau \nu$ leptonic and semileptonic decays
• Non-leptonic charmless Bc decays and their search at LHCb
• The $B_c\to D^{(\ast )}T$ decays in perturbative QCD approach
• Signature of Lepton flavor universality violation in $B_s\to D_s\tau \nu$ semileptonic decays
• Gold-plated Mode of CP-Violation in Decays of B_c Meson from QCD Sum Rules
• $B_c(B)\to Dl\tilde{\nu }$ form factors in Light-Cone Sum Rules and the $D$-meson distribution amplitude
• Study of the pure annihilation $B_c\to A_2{A}_3$ decays
• 2-loop QCD corrections to Bc-meson leptonic constant
• Phenomenology of ${\Xi }_b\to {\Xi }_c\tau \nu$ decays
• Calculation of the B_{c}leptonic decay constant using the shifted N-expansion method
• Production of B(c) mesons via fragmentation in the kT-factorization approach
• Effects of hadronic loops on the direct CP violation of $B_c$
• Study of $B_c$$\to$$J/\psi V$ and $B_c^{\ast }$$\to$${\eta }_{c}V$ decays within the QCD factorization
• Semileptonic $B_c^{-}\to D^{\ast 0}\ell \nu$ transition in three--point QCD sum rules and HQET with gluon condensate corrections
• Probing New Physics in light of recent developments in $b\to c\ell \nu$ transitions
• Radiative B_c -> tau nu_tau gamma decay
• Analysis of $b\to c\tau {\bar{\nu }}_{\tau }$ anomalies using weak effective Hamiltonian with complex couplings
• B^-_c->η' \ell^- \barν decay and lepton polarization asymmetry
• Charmless $B_c\to VV$ decays in the QCD factorization approach
• Decay of $B_c^{\ast +}(3S)\to B^{+}{D}^0$
• Addressing the $R_{\tau /\mu ,e}\left(D^{(\ast )}\right)$ puzzle through New Physics four-fermion operators and their impact on ${\Lambda }_b\to {\Lambda }_c\tau {\bar{\nu }}_{\tau }$ decay
• The Angular Observables of ${\Lambda }_b\to {\Lambda }_c(\to {\Lambda }^0{\pi }^{+}){\tau }^{-}(\to {\pi }^{-}{\nu }_{\tau }){\bar{\nu }}_{\tau }$ within the Paradigm of FCCC Anomalies
• Study of the two-body nonleptonic $B_c(2S)$ weak decays with the QCD factorization approach