${\Lambda }_b\to p,\Lambda$ transition form factors from QCD light-cone sum rules

Abstract

Light-cone sum rules for the ${\Lambda }_b\to p,\Lambda$ transition form factors are derived from the correlation functions expanded by the twist of the distribution amplitudes of ${\Lambda }_b$ baryon. In terms of the ${\Lambda }_b$ three-quark distribution amplitudes models constrained by the QCD theory, we calculate the form factors at small momentum transfers and compare the results with that estimated in the conventional light-cone sum rules (LCSR) and perturbative QCD approaches. Our results indicate that the two different version of sum rules can lead to the consistent numbers of form factors responsible for ${\Lambda }_b\to p$ transition. The ${\Lambda }_b\to \Lambda$ transition form factors from LCSR with the asymptotic $\Lambda$ baryon distribution amplitudes are found to be almost one order larger than that obtained in the ${\Lambda }_b$-baryon LCSR, implying that the pre-asymptotic corrections to the baryonic distribution amplitudes are of great importance. Moreover, SU(3) symmetry breaking effect between the form factors $f_1^{{\Lambda }_b\to p}$ and $f_1^{{\Lambda }_b\to \Lambda }$ are computed as $28_{-8}^{+14}$ in the framework of ${\Lambda }_b$-baryon LCSR.

18 pages, 5 figures

References in corpus (27)

• QCD at Low Energies
• Form Factors from Light-Cone Sum Rules with B-Meson Distribution Amplitudes
• Linking Parton Distributions to Form Factors and Compton Scattering
• Nucleon Form Factors in QCD
• Renormalization-Group Evolution of the B-Meson Light-Cone Distribution Amplitude
• Light-Cone Sum Rules for the Nucleon Form Factors
• $B$-Meson Distribution Amplitude from the $B\to \pi$ Form Factor
• Rare Decays of Λ_b->Λ+ γand Λ_b ->Λ+ l^{+} l^{-} in the Light-cone Sum Rules
• Anatomy of the pQCD Approach to the Baryonic Decays ${\Lambda }_b\to p\pi ,pK$
• $B\to D^{(\ast )}$ Form Factors from QCD Light-Cone Sum Rules
• $D^{\ast }D\pi$ and $B^{\ast }B\pi$ form factors from QCD Sum Rules
• Exclusive Rare Decays of Heavy Baryons to Light Baryons: $Λ_b \ri ghtarrow Λγ$ and ${\Lambda }_b\to \Lambda l^{+}{l}^{-}$
• The $J/\psi DD$ Vertex in QCD Sum Rules
• The transition form factors for semi-leptonic weak decays of $J/\psi$ in QCD sum rules
• Distribution Amplitudes of the Lambda_b Baryon in QCD
• QCD Sum Rules for Exclusive Decays of Heavy Mesons
• J/psi D*D* vertex from QCD sum rules
• PQCD Calculation for ${\Lambda }_b\to \Lambda \gamma$ in the Standard Model
• Distribution amplitudes of $\Sigma$ and $\Lambda$ and their electromagnetic form factors
• Light-cone QCD sum rules for the semileptonic decay Lambda_b --> p lepton anti-neutrino
• Semileptonic D decay into scalar mesons: a QCD sum rule approach
• Decay ${\Lambda }_b\to pl\bar{\nu }$ in QCD sum rules
• Applicability of perturbative QCD to ${\Lambda }_b\to {\Lambda }_c$ decays
• Diquarks and the Semi-Leptonic Decay of ${\Lambda }_b$ in the Hybrid Scheme
• The ${\Lambda }_b\to pl\bar{\nu }$ decay in perturbative QCD
• The perturbative proton form factor reexamined
• Analysis of the $B\to a_1(1260)$ form-factors with light-cone QCD sum rules

Cited by in corpus (44)

• Understanding the B->K*mu+mu- Anomaly
• Measurement of the $B_s^0\to {\mu }^{+}{\mu }^{-}$ branching fraction and search for $B^0\to {\mu }^{+}{\mu }^{-}$ decays at the LHCb experiment
• ${\Lambda }_b\to p{\ell }^{-}{\bar{\nu }}_{\ell }$ and ${\Lambda }_b\to {\Lambda }_c{\ell }^{-}{\bar{\nu }}_{\ell }$ form factors from lattice QCD with relativistic heavy quarks
• ${\Lambda }_b\to \Lambda {\ell }^{+}{\ell }^{-}$ form factors, differential branching fraction, and angular observables from lattice QCD with relativistic $b$ quarks
• Light-Cone Distribution Amplitudes for Heavy-Quark Hadrons
• Form Factors for Lambda_b -> Lambda Transitions in SCET
• QCD corrections to $B\to \pi$ form factors from light-cone sum rules
• Decay properties of $P$-wave charmed baryons from light-cone QCD sum rules
• Weak Decays of Heavy Baryons in Light-Front Approach
• Analysis of the $Λ_{b}\rar Λ\ell^+\ell^- $ decay in QCD
• Evaluating decay Rates and Asymmetries of ${\Lambda }_b$ into Light Baryons in LFQM
• Heavy-to-light baryonic form factors at large recoil
• $b\to c\tau {\nu }_{\tau }$ Decays: A Catalogue to Compare, Constrain, and Correlate New Physics Effects
• Heavy-to-light semileptonic decays of Lambda_b and Lambda_c baryons in the covariant confined quark model
• Nucleon Form Factors and Distribution Amplitudes in QCD
• Lambda_b -> Lambda l+ l- form factors and differential branching fraction from lattice QCD
• Light-Cone Sum Rules Analysis of ${\Xi }_{Q{Q}^{\prime }q}\to {\Lambda }_{Q^{\prime }}$ Weak Decays
• Electroproduction of the $N^{\ast }(1535)$ nucleon resonance in QCD
• Semileptonic ${\Lambda }_{b,c}$ to Nucleon Transitions in Full QCD at Light Cone
• Weak Decays of Doubly Heavy Baryons: W-Exchange
• ${\Lambda }_b\to p$ transition form factors in perturbative QCD
• Lepton mass effects and angular observables in ${\Lambda }_b\to \Lambda (\to p\pi ){\ell }^{+}{\ell }^{-}$
• ${\Lambda }_b\to p{l}^{-}\bar{\nu }$ form factors from lattice QCD with static b quarks
• ${\Lambda }_b\to {\Lambda }_c$ Form Factors from QCD Light-Cone Sum Rules
• ${\Lambda }_b\to p,N^{\ast }(1535)$ Form Factors from QCD Light-Cone Sum Rules
• Searching for tetraquark through weak decays of b-baryons
• Recent Developments on the CKM Matrix
• Charmonium decays of beauty baryons in the perturbative QCD approach
• The PQCD approach towards to next-to-leading order: a short review
• On sum rules for semi-leptonic $b\to c$ and $b\to u$ decays
• Transition form factors and angular distributions of the ${\mathbf{\Lambda }}_{\mathbf{b}}\to \mathbf{\Lambda }(1520)(\to \mathbf{N}\bar{\mathbf{K}}){\mathbf{\ell }}^{+}{\mathbf{\ell }}^{-}$ decay supported by baryon spectroscopy
• Higher twist corrections to doubly-charmed baryonic $B$ decays
• Final-state rescattering mechanism in bottom-baryon decays
• Light-Cone Sum Rules Analysis of ${\Xi }_{Q{Q}^{\prime }q}\to {\Sigma }_{Q^{\prime }}^{\ast }$ Weak Decays
• The decays ${\Lambda }_{b,c}\to N^{\ast }l\nu$ in QCD
• Light-Cone Distribution Amplitudes of Light $J^{PC}=2^{--}$ Tensor Mesons in QCD
• The ${\Lambda }_b\to \Lambda (\to p{\pi }^{-}){\mu }^{+}{\mu }^{-}$ decay in the ${\text{RS}}_c$ model
• Semileptonic Decay of ${\Xi }_c\to \Xi {\ell }^{+}{\nu }_{\ell }$ From Light-Cone QCD Sum Rules
• Form factors of ${\Lambda }_b^0\to {\Lambda }_c(2595{)}^{+}$ within light-cone QCD sum rules
• Semileptonic neutral current decays of ${\Xi }_b$ with dileptons or dineutrinos in the final state
• Semileptonic decay of double strangeness heavy flavor baryons
• ${\Xi }_b\to \Xi$ form factors from lattice QCD and Standard-Model predictions for ${\Xi }_b\to \Xi {\mu }^{+}{\mu }^{-}$ and ${\Xi }_b\to \Xi \gamma$ decays
• Next-to-leading-order QCD calculations of $B\to A$ form factors with higher-twist corrections
• Analysis of the semileptonic decays ${\Sigma }_b\to {\Sigma }_{c}l{\bar{\nu }}_l$, ${\Xi }_b^{\prime }\to {\Xi }_c^{\prime }l{\bar{\nu }}_l$ and ${\Omega }_b\to {\Omega }_{c}l{\bar{\nu }}_l$ in QCD sum rules