Determination of gamma from Charmless B --> M1 M2 Decays Using U-Spin

Abstract

In our previous paper we applied U-spin symmetry to charmless hadronic B+- --> M0 M+- decays for the purpose of precise extraction of the unitarity angle gamma. In this paper we extend our approach to neutral B0 and Bs --> M1 M2 decays. A very important feature of this method is that no assumptions regarding relative sizes of topological decay amplitudes need to be made. As a result, this method avoids an uncontrollable theoretical uncertainty that is often related to the neglect of some topological diagrams (e.g., exchange and annihilation graphs) in quark-diagrammatic approaches. In charged B+- decays, each of the four data sets, P0 P+-, P0 V+-, V0 P+- and V0 V+-, with P=pseudoscalar and V=vector, can be used to obtain a value of gamma. Among neutral decays, only experimental data in the B0, Bs --> P- P+ subsector is sufficient for a U-spin fit. Application of the U-spin approach to the current charged and neutral B decay data yields: gamma=(80^{+6}_{-8}) degrees. In this method, which is completely data driven, in a few years we should be able to obtain a model independent determination of gamma with an accuracy of O(few degrees).

31 pages

References in corpus (52)

• CP Violation and the CKM Matrix: Assessing the Impact of the Asymmetric B Factories
• QCD factorization for B->PP and B->PV decays
• QCD Factorization in B -> pi K, pi pi Decays and Extraction of Wolfenstein Parameters
• Penguin Enhancement and $B\to K\pi$ decays in perturbative QCD
• B -> M1 M2: Factorization, Charming Penguins, Strong Phases, and Polarization
• New Strategies to Extract $\beta$ and $\gamma$ from $B_d\to {\pi }^{+}{\pi }^{-}$ and $B_s\to K^{+}{K}^{-}$
• Charmless $B\to PP$ decays using flavor SU(3) symmetry
• Polarization in B->VV Decays
• Two body B decays with isosinglet final states in SCET
• Model-independent electroweak penguins in B decays to two pseudoscalars
• Rates, Polarizations, and Asymmetries in Charmless Vector-Vector B Meson Decays
• Dalitz-plot analysis of the decays B+/- --> K+/- pi-/+ pi+/-
• Measurement of Branching Fractions and Polarization in B -> phi K^{(*)} Decays
• Search for Exclusive Charmless Hadronic B Decays
• SU(3) Relations and the CP Asymmetries in B Decays to ${\eta }^{\prime }{K}_S$, $\varphi K_S$ and $K^{+}{K}^{-}{K}_S$
• Measurement of Polarization and Triple-Product Correlations in B -> phi K^* Decays
• Charmless $B\to VP$ Decays Using Flavor SU(3) Symmetry
• Effects of Final-state Interactions on Mixing-induced CP Violation in Penguin-dominated B Decays
• Observation of B+ -> rho+ rho0
• U-Spin Symmetry in Charmless B Decays
• Two-body B Meson Decays to eta and eta': Observation of B->eta K*
• Study of Charmless Hadronic B Meson Decays to Pseudoscalar-Vector Final States
• Measurements of Charmless Hadronic Two-Body B Meson Decays and the Ratio cal B(B--> DK)/ cal B(B--> Dπ)
• CP asymmetry Relations Between ${\bar{B}}^0\to \pi \pi$ and ${\bar{B}}^0\to \pi K$ Rates
• Measurement of Charge Asymmetries in Charmless Hadronic in B Meson Decays
• Strong Phases and Factorization for Color Suppressed Decays
• Measurement of phi_3 with Dalitz plot analysis of B+ -> D(*)K(*)+ decay
• Possible Large Direct CP Violations in Charmless B-Decays
• I-spin, U-spin, and penguin dominance in $B\to KK\bar{K}$
• Isospin-breaking effects on alpha extracted in B --> pi pi, rho rho, rho pi
• Extracting CKM Phases from Angular Distributions of $B_{d,s}$ Decays into Admixtures of CP Eigenstates
• Observation of $B\to \varphi K$ and $B\to \varphi K^{\ast }$
• Two-Body Charmless B Decays Involving eta and eta'
• Observation of $B^{+}\to \omega K^{+}$ and Search for Related $B$ Decay Modes
• New Bounds On The CKM Matrix From B -> K pi pi Dalitz Plot Analyses
• Amplitude Analysis of the Decay B+- -> pi+- pi+- pi-+
• Measurements of Branching Fractions and Time-Dependent CP-Violating Asymmetries in B to eta' K Decays
• Study of B -> ρπdecays at Belle
• First Evidence for $B_s^0\to \varphi \varphi$ Decay and Measurements of Branching Ratio and $A_{CP}$ for $B^{+}\to \varphi K^{+}$
• A General Analysis of $\gamma$ Determinations from $B\to \pi K$ Decays
• On measuring alpha in B(t)-> rho^\pm pi^\mp
• Evidence for B-> eta' pi and improved measurements for B-> eta' K
• Measurement of Branching Fraction and CP Asymmetry in B+ ->rho+ pi0
• Measurement of branching fractions and charge asymmetries in B+ decays to etapi+, etaK+, etarho+ and eta'pi+, and search for B0 decays to etaK0 and etaomega
• A Search for Charmless $B\to VV$ Decays
• Search for B+ -> phi pi+ and B0 -> phi pi0 Decays
• B Meson Decays to mega K*, omega rho, omega omega, omega phi, and omega f0
• Determination of gamma from charmless B^+/- -> M^0 M^+/- decays using U-spin
• Evidence for the Decay B+- --> K*+- pi0
• Measurements of CP-Violating Asymmetries and Branching Fractions in B Decays to omegaK and omegapi
• ${\bar{B}}^0\to {\pi }^{+}X$ in the Standard Model
• Weak Phases and CP Violation

Cited by in corpus (14)

• The Physics of the B Factories
• QCD Factorization for Charmless Hadronic B_s Decays Revisited
• Observation of New Charmless Decays of Bottom Hadrons
• U-spin breaking in CP asymmetries in B decays
• Evidence for the charmless annihilation decay mode $B_s^0\to {\pi }^{+}{\pi }^{-}$
• U-Spin Sum Rules for CP Asymmetries of Three-Body Charmed Baryon Decays
• General Analysis of U-Spin Breaking in B Decays
• Measurement of Branching Fractions and CP Asymmetries in B -> wK Decays and First Evidence of CP Violation in B0 -> wKS0
• Branching fraction and CP-violation charge asymmetry measurements for B-meson decays to eta K+-, etapi+-, eta'K, eta'pi+-, omega K, and omegapi+-
• The Mathematical Structure of $U$-Spin Amplitude Sum Rules
• Search for the decay B+ -> Kbar*0(892) K+
• A model independent method for quantitative estimation of $SU(3)$ flavor symmetry breaking using Dalitz plot
• $CP$-violation and $U$-spin symmetry in four-body bottom baryon decays
• Polarisation fractions in $B\to V_1{V}_2$: U-Spin constraints and new physics signatures