Study of the weak annihilation contributions in charmless $B_s\to VV$ decays

Abstract

In this paper, in order to probe the spectator-scattering and weak annihilation contributions in charmless $B_s\to VV$ (where $V$ stands for a light vector meson) decays, we perform the ${\chi }^2$-analyses for the end-point parameters within the QCD factorization framework, under the constraints from the measured ${\bar{B}}_s\to$${\rho }^0\varphi$, $\varphi K^{\ast 0}$, $\varphi \varphi$ and $K^{\ast 0}{\bar{K}}^{\ast 0}$ decays. The fitted results indicate that the end-point parameters in the factorizable and nonfactorizable annihilation topologies are non-universal, which is also favored by the charmless $B\to PP$ and $PV$ (where $P$ stands for a light pseudo-scalar meson) decays observed in the previous work. Moreover, the abnormal polarization fractions $f_{L,\perp }({\bar{B}}_s\to K^{\ast 0}{\bar{K}}^{\ast 0})=(20.1\pm 7.0)\%,(58.4\pm 8.5)\%$ measured by the LHCb collaboration can be reconciled through the weak annihilation corrections. However, the branching ratio of ${\bar{B}}_s\to \varphi K^{\ast 0}$ decay exhibits a tension between the data and theoretical result, which dominates the contributions to ${\chi }_{\min }^2$ in the fits. Using the fitted end-point parameters, we update the theoretical results for the charmless $B_s\to VV$ decays, which will be further tested by the LHCb and Belle-II experiments in the near future.

arXiv comment31 pages, 4 figures, 6 tables

References in corpus (52)

• Weak Decays Beyond Leading Logarithms
• An effective field theory for collinear and soft gluons: heavy to light decays
• Soft-Collinear Factorization in Effective Field Theory
• QCD Factorization for $B\to \pi \pi$ Decays: Strong Phases and CP Violation in the Heavy Quark Limit
• QCD factorization for exclusive, non-leptonic B meson decays: General arguments and the case of heavy-light final states
• LHCb Detector Performance
• QCD factorization for B->PP and B->PV decays
• Soft-collinear effective theory and heavy-to-light currents beyond leading power
• Penguin Enhancement and $B\to K\pi$ decays in perturbative QCD
• Fat penguins and imaginary penguins in perturbative QCD
• $B\to V{\ell }^{+}{\ell }^{-}$ in the Standard Model from Light-Cone Sum Rules
• Charmless non-leptonic B_s decays to PP, PV and VV final states in the pQCD approach
• Multipole-expanded soft-collinear effective theory with non-abelian gauge symmetry
• Branching fractions, polarisation and asymmetries of B -> VV decays
• In Pursuit of New Physics with B_s Decays
• Branching Ratio Measurements of $B_s$ Decays
• Polarization in B->VV Decays
• Measurement of sigma(pp -> b anti-b X) at \sqrt(s)=7 TeV in the forward region
• QCD Factorization for Charmless Hadronic B_s Decays Revisited
• NNLO vertex corrections to non-leptonic B decays: Tree amplitudes
• Revisiting Charmless Hadronic B_{u,d} Decays in QCD Factorization
• Updating B --> PP, VP decays in the framework of flavor symmetry
• QCD factorization for B -> PP
• Branching ratio and CP asymmetry of $B_s\to {\pi }^{+}{\pi }^{-}$ decays in the perturbative QCD approach
• Revisiting the pure annihilation decays $B_s\to {\pi }^{+}{\pi }^{-}$ and $B^0\to K^{+}{K}^{-}$: the data and the pQCD predictions
• Two-loop current-current operator contribution to the non-leptonic QCD penguin amplitude
• On Puzzles and Non-Puzzles in B -> pi pi, pi K Decays
• Final state interactions for B => VV charmless decays
• Phenomenological Analysis of Charmless Decays Bs->PP,PV with QCD Factorization
• Measurement of the B0->PhiK*0 Decay Amplitudes
• Two-body non-leptonic heavy-to-heavy decays at NNLO in QCD factorization
• Improved Estimates of The $B_{(s)}\to VV$ Decays in Perturbative QCD Approach
• Exclusive Chromomagnetism in heavy-to-light FCNCs
• Enhanced electroweak penguin amplitude in B-->VV decays
• Evidence for the charmless annihilation decay mode $B_s^0\to {\pi }^{+}{\pi }^{-}$
• Infrared Divergence and Twist-3 Distribution Amplitudes in QCD Factorization For $B\to PP$
• Study of $B\to K^{\ast }\rho ,K^{\ast }\omega$ Decays with Polarization in Perturbative QCD Approach
• Spectator Scattering and Annihilation Contributions as a Solution to the $\pi K$ and $\pi \pi$ Puzzles within QCD Factorization Approach
• A Combined Fit on the Annihilation Corrections in $B_{u,d,s}$ $\to$ $PP$ Decays Within QCDF
• Flavor dependence of annihilation parameters in QCD factorization
• Implications of the recent measurement of pure annihilation $B_s\to {\pi }^{+}{\pi }^{-}$ decays in QCD factorization
• Resolving the $B\to K\pi$ puzzle by Glauber-gluon effects
• Revisiting the Annihilation Corrections in Non-leptonic ${\bar{B}}_s^0$ Decays within QCD Factorization
• Constraints on the anomalous tensor operators from B\toϕK^{\ast}, ηK^{\ast}$ and ηK decays
• Constraints on hard spectator scattering and annihilation corrections in $B_{u,d}$ $\to$ $PV$ decays within QCD factorization
• Revisiting the annihilation decay ${\bar{B}}_s\to {\pi }^{+}{\pi }^{-}$
• Measurement of $CP$ asymmetries and polarisation fractions in $B_s^0\to K^{\ast 0}\bar{K}{}^{\ast 0}$ decays
• Hadronic B decays in the MSSM with large tan(beta)
• ${\bar{B}}_{d,s}\to D_{d,s}^{\ast }V$ and ${\bar{B}}_{d,s}^{\ast }\to D_{d,s}V$ decays within QCD Factorization and Possible Puzzles
• Probing Spectator Scattering and Annihilation Corrections in $B_s$ $\to$ $PV$ Decays
• Heavy Flavour Physics at the LHC
• Fits of Weak Annihilation and Hard Spectator Scattering Corrections in $B_{u,d}\to VV$ Decays

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• Anatomy of $B_s\to VV$ decays and effects of next-to-leading order contributions in the perturbative QCD factorization approach
• Global Analysis of Charmless $B$ Decays into Two Vector Mesons in Soft-Collinear Effective Theory
• Four-body decays $B_{(s)}\to (K\pi {)}_{S/P}(K\pi {)}_{S/P}$ in the perturbative QCD approach
• Enhanced Next-to-Leading-Order Corrections to Weak Annihilation $B$-Meson Decays
• Time-reversal asymmetries and angular distributions in ${\Lambda }_b\to \Lambda V$
• Searching for possible evidences of new physics in $B\to V_1{V}_2$
• $CP$-violating observables in four-body $B\to \varphi (\to K\bar{K})K^{\ast }(\to K\pi )$ decays
• A phenomenological estimate of rescattering effects in $B_s\to K^{\ast 0}{\bar{K}}^{\ast 0}$
• Pure annihilation decays of $B_s^0\to a_0^{+}{a}_0^{-}$ and $B_d^0\to K_0^{\ast +}{K}_0^{\ast -}$ in the PQCD approach