Semileptonic baryon decays ${\Xi }_b\to {\Xi }_c{\ell }^{-}{\bar{\nu }}_{\ell }$ in perturbative QCD

Abstract

We perform a detailed analysis of the semileptonic ${\Xi }_b\to {\Xi }_c{\ell }^{-}{\bar{\nu }}_{\ell }$ decays within the perturbative QCD framework. In our study, the ${\Xi }_b\to {\Xi }_c$ transition form factors are calculated using several popular models for baryonic light-cone distribution amplitudes. These form factors are then employed to analyze a range of observable quantities for the semileptonic processes via the helicity formalism. Our work presents predictions for the branching fractions of these decays for both the $\tau$ and $e$ channels. Notably, the obtained lepton flavor universality ratio, ${\mathcal{R}}_{{\Xi }_c}\approx 0.3$, may offer new insights into the ${\mathcal{R}}^{(\ast )}$ puzzle. Furthermore, we investigate various angular observables, such as forward-backward asymmetries, lepton-side convexity parameters, and polarization asymmetries, which provide complementary information regarding potential new physics in $b$-baryonic semileptonic transitions. The numerical results for these angular observables are presented as both functions of $q^2$ and as averaged values. We observe that the lepton mass plays a significant role in shaping the angular distributions, affecting most of the observables under consideration. These results are expected to be valuable for both current and future experimental investigations of semileptonic heavy-to-heavy baryon decays.

arXiv comment26 pages, 11 figures, PRD journal version

References in corpus (77)

• Evidence for an excess of B -> D(*) Tau Nu decays
• Measurement of an Excess of B -> D(*) Tau Nu Decays and Implications for Charged Higgs Bosons
• Measurement of the branching ratio of $\bar{B}\to D^{(\ast )}{\tau }^{-}{\bar{\nu }}_{\tau }$ relative to $\bar{B}\to D^{(\ast )}{\ell }^{-}{\bar{\nu }}_{\ell }$ decays with hadronic tagging at Belle
• Penguin Enhancement and $B\to K\pi$ decays in perturbative QCD
• Branching Ratio and CP Violation of B to pi pi Decays in Perturbative QCD Approach
• Measurement of the branching ratio of ${\bar{B}}^0\to D^{\ast +}{\tau }^{-}{\bar{\nu }}_{\tau }$ relative to ${\bar{B}}^0\to D^{\ast +}{\ell }^{-}{\bar{\nu }}_{\ell }$ decays with a semileptonic tagging method
• Averages of $b$-hadron, $c$-hadron, and $\tau$-lepton properties as of 2021
• Heavy baryons
• Charmless non-leptonic B_s decays to PP, PV and VV final states in the pQCD approach
• Measurement of the ratio of branching fractions $\mathcal{B}(B_c^{+}\to J/\psi {\tau }^{+}{\nu }_{\tau })$/$\mathcal{B}(B_c^{+}\to J/\psi {\mu }^{+}{\nu }_{\mu })$
• Leading-power contributions to $B\to \pi ,\rho$ transition form factors
• Combined analysis of semileptonic $B$ decays to $D$ and $D^{\ast }$: $R(D^{(\ast )})$, $|V_{cb}|$, and new physics
• Revisiting $B\to D\ell \nu$
• Measurement of $\mathcal{R}(D)$ and $\mathcal{R}(D^{\ast })$ with a semileptonic tagging method
• $R(D^{\ast })$, $|V_{cb}|$, 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
• ${\Lambda }_b\to p{\ell }^{-}{\bar{\nu }}_{\ell }$ and ${\Lambda }_b\to {\Lambda }_c{\ell }^{-}{\bar{\nu }}_{\ell }$ form factors from lattice QCD with relativistic heavy quarks
• Review of Lepton Universality tests in B decays
• Extraction of $|V_{cb}|$ from $B\to D^{(\ast )}\ell {\nu }_{\ell }$ and the Standard Model predictions of $R(D^{(\ast )})$
• Heavy Baryon Transitions in a Relativistic Three-Quark Model
• B to light meson transition form factors calculated in perturbative QCD approach
• The $V_{cb}$ puzzle: an update
• Nonleptonic Weak Decays of Bottom Baryons
• The semileptonic decay Lambda_b -> Lambda_c + tau(-) + antinu_tau in the covariant confined quark model
• 1/M Corrections to Baryonic Form Factors in the Quark Model
• Light-Cone Distribution Amplitudes for Heavy-Quark Hadrons
• Phenomenology of ${\Lambda }_b\to {\Lambda }_c\tau {\bar{\nu }}_{\tau }$ using lattice QCD calculations
• Weak Decays of Heavy Baryons in Light-Front Approach
• Theory determination of $\bar{B}\to D^{(\ast )}{\ell }^{-}\bar{\nu }$ form factors at $\mathcal{O}(1/m_c^2)$
• Perturbative Corrections to ${\Lambda }_b\to \Lambda$ Form Factors from QCD Light-Cone Sum Rules
• Rare baryon decays Lambda_b -> Lambda l+ l- (l=e, mu, tau) and Lambda_b -> Lambda gamma : Differential and total rates, lepton- and hadron-side forward-backward asymmetries
• $B\to D^{(\ast )}$ form factors in perturbative QCD
• Semileptonic decays of heavy baryons in the relativistic quark model
• Anatomy of the pQCD Approach to the Baryonic Decays ${\Lambda }_b\to p\pi ,pK$
• B to tensor meson form factors in the perturbative QCD approach
• Semileptonic form factors for $B\to D^{\ast }\ell \nu$ at nonzero recoil from 2 + 1-flavor lattice QCD
• Helicity Analysis of Semileptonic Hyperon Decays Including Lepton Mass Effects
• Observation of the decay ${\Lambda }_b^0\to {\Lambda }_c^{+}{\tau }^{-}{\overline{\nu }}_{\tau }$
• $R(J/\psi )$ and $B_c^{-}\to J/\psi {\ell }^{-}{\bar{\nu }}_{\ell }$ Lepton Flavor Universality Violating Observables from Lattice QCD
• Measurement of the ratios of branching fractions $\mathcal{R}(D^{\ast })$ and $\mathcal{R}(D^0)$
• Semitauonic $b$-hadron decays: A lepton flavor universality laboratory
• \large\bf $B_c\to (J/\Psi ,{\eta }_c)\tau \nu$ semileptonic decays within Standard model and beyond
• Recent Anomalies in B Physics
• Semileptonic decays of ${\Lambda }_b$ baryons in the relativistic quark model
• Precise predictions for ${\Lambda }_b\to {\Lambda }_c$ semileptonic decays
• Test of lepton flavour universality using $B^0\to D^{\ast -}{\tau }^{+}{\nu }_{\tau }$ decays with hadronic $\tau$ channels
• New predictions for ${\Lambda }_b\to {\Lambda }_c$ semileptonic decays and tests of heavy quark symmetry
• Semileptonic decays of $B_c$ meson to S-wave charmonium states in the perturbative QCD approach
• Distribution Amplitudes of the Lambda_b Baryon in QCD
• Estimation of Semileptonic Decays of $B_c$ Meson to S-wave Charmonia with NRQCD
• $|V_{cb}|$ and $R(D^{(\ast )})$ using lattice QCD and unitarity
• Lattice study of flavor SU(3) breaking in hyperon beta decay
• Analysis of the ${\frac{1}{2}}^{\pm }$ flavor antitriplet heavy baryon states with QCD sum rules
• Combined nonrelativistic constituent quark model and heavy quark effective theory study of semileptonic decays of Λ_b and Ξ_b baryons
• Charm and Bottom Baryon Decays in the Bethe-Salpeter Approach: Heavy to Heavy Semileptonic Transitions
• Light-Cone Distribution Amplitudes of the Ground State Bottom Baryons in HQET
• Impact of ${\Lambda }_b\to {\Lambda }_c\tau \nu$ measurement on New Physics in $b\to cl\nu$ transitions
• The semi-leptonic form factors of ${\Lambda }_b\to {\Lambda }_c$ and ${\Xi }_b\to {\Xi }_c$ in QCD sum rules
• Probing new physics in semileptonic ${\Lambda }_b$ decays
• Revisiting semileptonic decays of ${\Lambda }_{b(c)}$ supported by baryon spectroscopy
• Global fit to $b\to c\tau \nu$ anomalies as of Spring 2024
• Applicability of perturbative QCD to ${\Lambda }_b\to {\Lambda }_c$ decays
• Hochschild homology, trace map and $\zeta$-cycles
• Charmless two-body $B$ meson decays in perturbative QCD factorization approach
• The ${\Lambda }_b\to pl\bar{\nu }$ decay in perturbative QCD
• Relativistic description of the ${\Xi }_b$ baryon semileptonic decays
• Semileptonic $B\to \pi$ Decays from an Omnès Improved Nonrelativistic Constituent Quark Model
• Four-body decays $B_{(s)}\to (K\pi {)}_{S/P}(K\pi {)}_{S/P}$ in the perturbative QCD approach
• Integrability of the evolution equations for heavy-light baryon distribution amplitudes
• Analysis of the Lambda_b -> Lambda_c + l nu_l decay within a light-front constituent quark model
• Phenomenology of ${\Xi }_b\to {\Xi }_c\tau \nu$ decays
• Next-to-leading-logarithm $k_T$ resummation for $B_c\to J/\psi$ decays
• Measurement of the branching fraction ratios $R(D^{+})$ and $R(D^{\ast +})$ using muonic $\tau$ decays
• Charmonium decays of beauty baryons in the perturbative QCD approach
• Restudy of the color-allowed two-body nonleptonic decay of bottom baryons ${\Xi }_b$ and ${\Omega }_b$ supported by hadron spectroscopy
• Investigating the transition form factors of ${\Lambda }_b\to {\Lambda }_c(2625)$ and ${\Xi }_b\to {\Xi }_c(2815)$ and the corresponding weak decays with support from baryon spectroscopy
• Higher twist corrections to doubly-charmed baryonic $B$ decays

Cited by in corpus (2)

• Semileptonic neutral current decays of ${\Xi }_b$ with dileptons or dineutrinos in the final state
• Semileptonic decay form factors of ${\Xi }_b^0\to {\Xi }_c^{+}\ell {\bar{\nu }}_{\ell }$ in HQET