Flavor and CP Violation with Fourth Generations Revisited

Abstract

The Standard Model predicts a very small CP violation phase $\sin 2{\Phi }_{B_s}^{\mathrm{SM}}\simeq -0.04$%= \arg M_{12} \simeq \arg\,(V^*_{ts}V_{tb})^2$in$B_s$--$\bar B_s$mixing.$λ^2η$.Anyfinitevalueof$Φ_{B_s}$measuredattheTevatronwouldimplyNewPhysics.Withrecenthintsforfinite$\sin2Φ_{B_s}$,$t'$masstobeneartheunitarityboundof500GeV.Combiningthemeasuredvaluesof$Δm_{B_s}$with${\cal B}(B \to X_s\ell^+\ell^-)$,togetherwithtypical$f_{B_s}$values,wefindasizable$\sin2Φ^{\rm SM4}_{B_s} \sim -0.33$.Using$m_{b'} = 480$GeV,weextracttherange$0.06 < |V_{t'b}| < 0.13$fromtheconstraintsof$Γ(Z\to b\bar b)$,$Δm_{D}$and${\cal B}(K^+\toπ^+ν\barν)$.Afuturemeasurementof${\cal B}(K_L\toπ^0ν\barν)$willdetermine$V_{t'd}$.

8 pages, 11 figures

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• Constraints on the Four-Generation Quark Mixing Matrix from a Fit to Flavor-Physics Data
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• New Strongly Coupled Sector at the Tevatron and the LHC
• Scalar Dark Matter and Standard Model with Four Generations
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• Neutrino dark matter candidate in fourth generation scenarios
• Top Pair Forward-Backward Asymmetry from Loops of New Strongly Coupled Quarks
• A Search for the Fourth SM Family: Tevatron still has a Chance
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• Study of some rare decays of B_s meson in the fourth generation model
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• Neutrino Masses and a Fourth Generation of Fermions
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• Detecting Fourth Generation Quarks at Hadron Colliders
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• Study of some B_s to f_0(980) decays in the fourth generation model
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• Observing CP-violating Higgs Signals with Heavy Majorana Neutrinos
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• A Model with Chiral Quarks of Electric Charges -4/3 and 5/3
• Pair Production of Fourth Family Charged Sleptons at $e^{+}{e}^{-}$ Colliders
• Semileptonic B to Scalar meson Decays in the Standard Model with Fourth Generation
• Analyzing the anomalous dipole moment type couplings of heavy quarks with FCNC interactions at the CLIC
• Higgs Mass Constraints on a Fourth Family: Upper and Lower Limits on CKM Mixing
• Relating B_s Mixing and B_s->mu+mu- with New Physics - An Update
• Neutron EDM in Four Generation Standard Model