692 research outputs found

    Particle-Antiparticle Mixing, epsilon_K, Delta Gamma_q, A_SL^q, A_CP(B_d -> psi K_S), A_CP(B_s -> psi phi) and B -> X_{s,d} gamma in the Littlest Higgs Model with T-Parity

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    We calculate a number of observables related to particle-antiparticle mixing in the Littlest Higgs model with T-parity (LHT). The resulting effective Hamiltonian for Delta F=2 transitions agrees with the one of Hubisz et al., but our phenomenological analysis goes far beyond the one of these authors. In particular, we point out that the presence of mirror fermions with new flavour and CP-violating interactions allows to remove the possible Standard Model (SM) discrepancy between the CP asymmetry S_{psi K_S} and large values of |V_ub| and to obtain for the mass difference Delta M_s < (Delta M_s)_SM as suggested by the recent result by the CDF collaboration. We also identify a scenario in which simultaneously significant enhancements of the CP asymmetries S_{phi psi} and A_SL^q relative to the SM are possible, while satisfying all existing constraints, in particular from the B -> X_s gamma decay and A_CP(B -> X_s gamma) that are presented in the LHT model here for the first time. In another scenario the second, non-SM, value for the angle gamma=-(109+-6) from tree level decays, although unlikely, can be made consistent with all existing data with the help of mirror fermions. We present a number of correlations between the observables in question and study the implications of our results for the mass spectrum and the weak mixing matrix of mirror fermions. In the most interesting scenarios, the latter one turns out to have a hierarchical structure that differs significantly from the CKM one.Comment: 51 pages, 20 figures, 1 table. Extended discussion of the phases in the new mixing matrix V_Hd, some references added or updated, conclusions unchanged. Final version published in JHE

    Logan County - General History

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    A brief historical survey of Russellville and post offices and place names in Logan County, Kentucky

    Rockcastle County - General History

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    A historical survey of Rockcastle County, Kentucky conducted by the Works Progress Administration. Includes a list of post offices and place names

    Nelson County - Post Offices & Place Names

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    A historical survey of post offices and place names in Nelson County, Kentucky

    Breckinridge County

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    A collection of research materials on the history of Breckinridge County, Kentucky

    Jackson Purchase - General History

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    A historical survey of the Jackson Purchase of Kentucky conducted by the Works Progress Administration in the late 1930s. Includes lists of community names, churches and cemeteries

    Magoffin County - Place Names

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    A historical survey of place names and post offices in Magoffin County, Kentucky

    Meade County - Post Offices & Place Names

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    A historical survey of post offices and place names in Meade County, Kentucky

    Trigg County - General History

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    A brief historical survey of Trigg County, Kentucky along with a list of post offices and community names

    Oldham County - Post Offices

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    A historical survey of post offices and community names in Oldham County, Kentucky
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