New physics footprints in the angular distribution of $B_s\to D_s^{\ast }(\to D_s\gamma ,D_s\pi )\tau \nu$ decays

Abstract

Hints of lepton flavor universality violation observed in various flavor ratios such as $R_D$, $R_{D^{\ast }}$, $R_{J/\psi }$, $P_{\tau }^{D^{\ast }}$ and $F_L^{D^{\ast }}$ in $B\to D^{(\ast )}\ell \nu$ and $B_c\to J/\psi \ell \nu$ charge current decays have opened new avenues to search for indirect evidences of beyond the standard model physics. Motivated by these anomalies, we perform a detailed angular analysis of $B_s\to D_s^{\ast }(\to D_s\gamma ,D_s\pi )\ell \nu$ decays that proceed via similar $b\to c\ell \nu$ quark level transition. We use the most general effective Hamiltonian for $b\to cl\nu$ process and give predictions of several $q^2$ and $\cos \theta$ dependent observables for the $B_s\to D_s^{\ast }(\to D_s\gamma ,D_s\pi )\ell \nu$ decays in the standard model and in the presence of various real and complex new physics couplings. The results pertaining to this decay are competent to address the anomalies in the charge current sector.

22 pages,100 figures, 7 tables

References in corpus (27)

• On the B to D* tau nu Sensitivity to New Physics
• Implications of lepton flavor universality violations in B decays
• New physics in the weak interaction of $\bar{B}\to D^{(\ast )}\tau \bar{\nu }$
• $R(D^{\ast })$, $|V_{cb}|$, and the Heavy Quark Symmetry relations between form factors
• Measurement of the $\tau$ lepton polarization and $R(D^{\ast })$ in the decay $\bar{B}\to D^{\ast }{\tau }^{-}{\bar{\nu }}_{\tau }$ with one-prong hadronic $\tau$ decays at Belle
• Extraction of $|V_{cb}|$ from $B\to D^{(\ast )}\ell {\nu }_{\ell }$ and the Standard Model predictions of $R(D^{(\ast )})$
• Simultaneous Explanation of the $R_K$ and $R_{D^{(\ast )}}$ Puzzles: a Model Analysis
• The B -> D* l nu form factor at zero recoil from three-flavor lattice QCD: A model independent determination of |V_cb|
• Probing New Physics with $q^2$ distributions in $\bar{B}\to D^{(\ast )}\tau \bar{\nu }$
• Measurement of $\mathcal{R}(D)$ and $\mathcal{R}(D^{\ast })$ with a semileptonic tagging method
• Weak decays of $B_s$ mesons to $D_s$ mesons in the relativistic quark model
• $B_s\to D_s(3040)$ form factors and $B_s$ decays into $D_s(3040)$
• Exclusive $B_s$ decays to the charmed mesons $D_s^{+}(1968,2317)$ in the standard model
• Tension in the inclusive versus exclusive determinations of $|V_{cb}|$: a possible role of new physics
• Study on $B_s\to D_{sJ}(2317,2460)l\bar{\nu }$ Semileptonic Decays in the CQM Model
• Investigation of Effects of New Physics in ${\Lambda }_b\to {\Lambda }_c\tau {\bar{\nu }}_{\tau }$ Decay
• Measurement of the $D^{\ast -}$ polarization in the decay $B^0\to D^{\ast -}{\tau }^{+}{\nu }_{\tau }$
• Lepton flavor universality violation in semileptonic tree level weak transitions
• Phenomenology of $b\to c\tau \bar{\nu }$ decays in a scalar leptoquark model
• Semileptonic $B_q\to D_q^{\ast }l\nu$ $(q=s,d,u)$ Decays in QCD Sum Rules
• A comprehensive study on the semileptonic decay of heavy flavor mesons
• Precision Model-Independent Bounds from Global Analysis of $b\to c\ell \nu$ Form Factors
• A Measurable Angular Distribution for $\bar{B}\to D^{\ast }{\tau }^{-}{\bar{\nu }}_{\tau }$ Decays
• Lepton Flavor Universality tests through angular observables of $\overline{B}\to D^{(\ast )}\ell \overline{\nu }$ decay modes
• Branching fractions of $B_{(c)}$ decays involving $J/\psi$ and $X(3872)$
• Exploring $R_D$, $R_{D^{\ast }}$ and $R_{J/\Psi }$ anomalies
• Semileptonic $B_q\to D_q^{\ast }l\nu$ $(q=s,d,u)$ transitions in QCD

Cited by in corpus (4)

• Consequences of $b\to s{\mu }^{+}{\mu }^{-}$ anomalies on $B\to K^{(\ast )}\nu \bar{\nu }$, $B_s\to (\eta ,{\eta }^{\prime })\nu \bar{\nu }$ and $B_s\to \varphi \nu \bar{\nu }$ decay observables
• Prediction of various observables for $B_s^0\to D_s^{(\ast )-}{\ell }^{+}{\nu }_{\ell }$ within covariant confined quark model
• In-medium mass shift of two-flavored heavy mesons, $B_c$, $B_c^{\ast }$, $B_s$, $B_s^{\ast }$, $D_s$ and $D_s^{\ast }$
• Assessing Lepton Flavor Universality Violations in Semileptonic Decays