The Golden Modes B^0 -> J/psi K_{S,L} in the Era of Precision Flavour Physics

Abstract

The B^0 -> J/ψK_{S,L} channels are outstanding probes of CP violation. We have a detailed look at the associated Standard-Model uncertainties, which are related to doubly Cabibbo-suppressed penguin contributions, and point out that these usually neglected effects can actually be taken into account unambiguously through the CP asymmetries and the branching ratio of the B^0 -> J/ψpi^0 decay. Using the most recent B-factory measurements, we find a negative shift of the extracted value of beta, which softens the tension in the fits of the unitarity triangle. In addition, this strategy can be used to constrain a possible new-physics phase in B^0-\bar B^0 mixing. The proposed strategy is crucial to fully exploit the tremendous accuracies for the search for this kind of new physics that can be achieved at the LHC and future super-flavour factories.

arXiv comment4+1 pages, 4 figures

References in corpus (19)

• CP Violation and the CKM Matrix: Assessing the Impact of the Asymmetric B Factories
• New Results on B->pi, K, eta Decay Formfactors from Light-Cone Sum Rules
• A New Approach to a Global Fit of the CKM Matrix
• The 2004 UTfit Collaboration Report on the Status of the Unitarity Triangle in the Standard Model
• Waiting for the Top Quark Mass, K^+ --> π^+ ν\barν, B_s^0-\bar{B}_s^0 Mixing and CP Asymmetries in B-Decays
• Comment on the heavy-->light form factors
• Light-cone sum rules for $B\to \pi$ form factors revisited
• Probing New Physics through B Mixing: Status, Benchmarks and Prospects
• The Effect of Penguins in the B_d to J/psi K^0 CP asymmetry
• Observation of Time-Dependent CP Violation in B0 -> eta' K0 Decays and Improved Measurements of CP Asymmetries in B0 -> phiK0, KsKsKs and B0 -> J/psi K0 Decays
• Extracting $\gamma$ from $B_{s(d)}\to J/\psi K_S$ and $B_{d(s)}\to D_{d(s)}^{+}{D}_{d(s)}^{-}$
• The UTfit Collaboration Report on the Status of the Unitarity Triangle beyond the Standard Model I. Model-independent Analysis and Minimal Flavour Violation
• Precision Physics with B^0_s -> J/psi phi at the LHC: The Quest for New Physics
• B, Bs -> K form factors: an update of light-cone sum rule results
• $B_{s,d}\to \pi \pi ,\pi K,KK$: Status and Prospects
• Extracting CKM Phases from Angular Distributions of $B_{d,s}$ Decays into Admixtures of CP Eigenstates
• General Analysis of New Physics in $B\to J/\psi K$
• Evidence for CP violation in B0->J/Psi pi0 decays
• Improved measurement of time-dependent CP violation in B0 -> J/Psi pi0 decays

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• QCD and strongly coupled gauge theories: challenges and perspectives
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• Possible evidence for the breakdown of the CKM-paradigm of CP-violation
• Precision Physics with B^0_s -> J/psi phi at the LHC: The Quest for New Physics
• Measurement of the resonant and CP components in ${\overline{B}}^0\to J/\psi {\pi }^{+}{\pi }^{-}$ decays
• Effective Lifetimes of $B_s$ Decays and their Constraints on the $B_s^0$-${\bar{B}}_s^0$ Mixing Parameters
• Anatomy of $B_{s,d}^0\to J/\psi f_0(980)$
• Measurement of the CP-violating phase $\beta$ in $B^0\to J/\psi {\pi }^{+}{\pi }^{-}$ decays and limits on penguin effects
• Penguin contributions to CP phases in $B_{d,s}$ decays to charmonium
• Nonleptonic $B_s$ to charmonium decays: analyses in pursuit of determining the weak phase ${\beta }_s$
• In Pursuit of New Physics with B^0_s -> K^+K^-
• Determining weak phases from B->J/Psi P decays
• Extracting gamma and Penguin Topologies through CP Violation in B_s^0 -> J/psi K_S
• Rare Decays and CP Violation in the $B_s$ System
• Exploring CP Violation and $\eta$-${\eta }^{\prime }$ Mixing with the $B_{s,d}^0\to J/\psi {\eta }^{(\prime )}$ Systems
• The CKM Parameters
• On the consistency between the observed amount of CP violation in the K- and Bd-systems within minimal flavor violation
• A simple relation for B_s-mixing
• In Pursuit of New Physics with $B_d^0\to J/\psi K^0$ and $B_s^0\to J/\psi \varphi$ Decays at the High-Precision Frontier
• Standard Model Predictions and New Physics Sensitivity in B->DD Decays
• Heavy Flavour Physics and CP Violation at LHCb: a Ten-Year Review
• Testing the Standard Model and searching for New Physics with $B_d\to \pi \pi$ and $B_s\to KK$ decays
• Flavour Theory: 2009
• Doubly CKM-suppressed corrections to CP asymmetries in $B^0\to J/\psi K^0$
• Measurement of the time-dependent CP asymmetries in $B_s^0\to J/\psi K_{\mathrm{S}}^0$
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• Measurement of the $B_s^0\to J/\psi K_S^0$ branching fraction
• Measurement of CP violation in $B^0\to \psi (\to {\ell }^{+}{\ell }^{-})K_S^0(\to {\pi }^{+}{\pi }^{-})$ decays
• Future prospects of B physics
• Status and prospects for $CPT$ and Lorentz invariance violation searches in neutral meson mixing
• Branching ratios, $CP$ asymmetries and polarizations of $B\to \psi (2S)V$ decays
• Measurement of the branching fraction and time-dependent $CP$ asymmetry for $B^0\to J/\psi {\pi }^0$ decays
• First evidence for direct CP violation in beauty to charmonium decays
• Extracting gamma and Penguin Parameters from B^0_s -> J/psi K_S
• Theoretical Prospects for B Physics
• Experimental constraints from flavour changing processes and physics beyond the Standard Model
• How to tame penguins: Advancing to high-precision measurements of ${\varphi }_d$ and ${\varphi }_s$
• An exploration of $B_s\to J/\psi s\bar{s}$
• Impact of systematic and amplitude model correlations within and between systems of combined input: A case study with ${\varphi }_2$ ($\alpha$)
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• Measurement of the B${}_{\mathrm{s}}^0$ $\to$ J/$\psi$K${}_{\mathrm{S}}^0$ effective lifetime from proton-proton collisions at $\sqrt{s}$ = 13 TeV
• B Physics in the LHC Era: Selected Topics
• CKM studies from b physics at hadron machines
• Towards New Frontiers in CP Violation in B Decays
• CP Violation in the $B_s^0$ system