Enhanced KL to pi0 nu nubar from Direct CP Violation in B to K pi with Four Generations

Abstract

Recent CP violation results in B decays suggest that Z penguins may have large weak phase. This can be realized by the four generation (standard) model. Concurrently, B to Xs l+ l- and Bs mixing allow for sizable Vt's* Vt'b only if it is nearly imaginary. Such large effects in b to s transitions would affect s to d transitions, as kaon constraints would demand Vt'd different from zero. Using Gamma(Z to b bbar) to bound |Vt'b|, we infer sizable |Vt's| < |Vt'b| < |Vus|$. Imposing epsilon_K, K+ to pi+ nu nubar and epsilon'/epsilon constraints, we find Vt'd* Vt's = few x 10^(-4) with large phase, enhancing KL to pi0 nu nubar to 5x10^(-10) or even higher. Interestingly, Delta_mBd and sin(2PhiBd) are not much affected, as |Vt'd* Vt'b| << |Vtd* Vtb| = 0.01.

6 pages, 9 figures

References in corpus (5)

• The B Meson Decay Constant from Unquenched Lattice QCD
• The B -> pi K Puzzle and New Physics
• Difference in B^+ and B^0 Direct CP Asymmetry as Effect of a Fourth Generation
• The $b\to s$ penguin amplitude in charmless $B\to PP$ decays
• A Critical Study of the B -> K πPuzzle

Cited by in corpus (43)

• Four Statements about the Fourth Generation
• How much space is left for a new family?
• SM with four generations: Selected implications for rare B and K decays
• Large Time-dependent CP Violation in B_s^0 System and Finite D^0-D^0bar Mass Difference in Four Generation Standard Mode
• Collider aspects of flavour physics at high Q
• Fourth Generation CP Violation Effect on B -> K pi, phi K and rho K in NLO PQCD
• Flavor and CP Violation with Fourth Generations Revisited
• Flavor Changing Neutral Currents involving Heavy Quarks with Four Generations
• Constraints on the Four-Generation Quark Mixing Matrix from a Fit to Flavor-Physics Data
• Simultaneous Extraction of the Fermi constant and PMNS matrix elements in the presence of a fourth generation
• New Strongly Coupled Sector at the Tevatron and the LHC
• Scalar Dark Matter and Standard Model with Four Generations
• Four Generation CP Violation in B -> phi K^0, pi^0 K^0, eta' K^0 and Hadronic Uncertainties
• Exclusive B-> M ν\barν (M= π, K, ρ, K^*) Decays and Leptophobic Z^\prime Model
• Small violations of unitarity, the phase in Bs mixing and visible t->cZ decays at the LHC
• A fourth generation, anomalous like-sign dimuon charge asymmetry and the LHC
• Remarks on the $A_{SL}^s$ and $\Delta {\Gamma }_s$ Studies at the Tevatron and Beyond
• The Lepton Sector of a Fourth Generation
• The s ---> d gamma decay in and beyond the Standard Model
• Collider signals of a composite Higgs in the Standard Model with four generations
• Leading Effect of CP Violation with Four Generations
• Revisiting Constraints on Fourth Generation Neutrino Masses
• Extended Friedberg Lee hidden symmetries, quark masses and CP-violation with four generations
• K_1(1270)-K_1(1400) mixing and the fourth generation SM effects in B-->K_1l^+l^- decays
• The Data Acquisition System for the KOTO Experiment
• CP Violation in Fourth Generation Quark Decays
• Complementarity of Semileptonic $B$ to $K_2^{\ast }(1430)$ and $K^{\ast }(892)$ Decays in the Standard Model with Fourth Generation
• Neutrino Masses and a Fourth Generation of Fermions
• Measuring the Fourth Generation b --> s Quadrangle at the LHC
• Search for TeV Scale Physics in Heavy Flavour Decays
• Experimental Sensitivity for Majorana Neutrinos Produced via a Z Boson at Hadron Colliders
• Physics Opportunities at the Next Generation of Precision Flavor Physics
• Correlating $B_q^0\to {\mu }^{+}{\mu }^{-}$ and $K_L\to {\pi }^0\nu \bar{\nu }$ Decays with Four Generations
• Threshold Effects in the Decay of Heavy b' and t' Quarks
• Flavour Theory and the LHC Era
• Characterising New Physics Models by Effective Dimensionality of Parameter Space
• Semileptonic B to Scalar meson Decays in the Standard Model with Fourth Generation
• Higgs Mass Constraints on a Fourth Family: Upper and Lower Limits on CKM Mixing
• Neutron EDM in Four Generation Standard Model
• Flavour physics with a 4th generation
• Constraints on the masses of fourth generation quarks
• Bounding CKM Mixing with a Fourth Family
• Highlights of Flavour Violation in the Presence of a 4th Generation