Search

The rho meson has long been successfully identified with a dynamical gauge boson of Hidden Local Symmetry (HLS) H local in the non-linear sigma model G / H gauge equivalent to the model having the symmetry G global × H local , with G = [ S U (2) L × S U (2) R ] ≃ O (4) , H = S U (2) V ≃ O (3) . However, under a hitherto unproven assumption that its kinetic term is dynamically generated, together with an ad hoc choice of the auxiliary field parameter " a = 2 ", we prove this assumption, thereby solving the long-standing mystery. The rho meson kinetic term is generated simply by the large N limit of the Grassmannian model G / H = O (N) / [ O (N − 3) × O (3) ] gauge equivalent to O (N) global × [ O (N − 3) × O (3) ] local , extrapolated to N = 4 , O (4) global × O (3) local , with all the phenomenologically successful " a = 2 results", i.e., ρ -universality, KSRF relation, and the Vector Meson Dominance, realized independently of the parameter "a". This in turn establishes validity of the large N dynamics at the quantitative level directly by the experiments. The relevant cutoff reads Λ ≃ 4 π F π for N = 4 , which is regarded as a matching scale of the HLS as a "magnetic dual" to QCD. Skyrmion is stabilized by such a dynamically generated rho meson without recourse to the underlying QCD, a further signal of the duality. The unbroken phase with a massless rho meson may be realized as a novel chiral-restored hadronic phase in the hot/dense QCD. [ABSTRACT FROM AUTHOR]

We discuss the sensitivity of the high-scale supersymmetry (SUSY) at 10-1000 TeV in B0, Bs, K0 and D meson systems together with the neutron electric dipole moment (EDM) and the mercury EDM. In order to estimate the contribution of the squark flavor mixing to these flavor changing neutral currents (FCNCs), we calculate the squark mass spectrum, which is consistent with the recent Higgs discovery. The SUSY contribution in ϵK could be large, around 40% in the region of the SUSY scale 10-100 TeV. The neutron EDM and the mercury EDM are also sensitive to the SUSY contribution induced by the gluino-squark interaction. The predicted EDMs are roughly proportional to ∣ϵSUSYK∣. If the SUSY contribution is the level of O(10%) for ϵK, the neutron EDM is expected to be discovered in the region of 10-28-10-26 ecm. The mercury EDM also gives a strong constraint for the gluino-squark interaction. The SUSY contribution of ΔMD is also discussed. [ABSTRACT FROM AUTHOR]

The neutral kaon system is a very peculiar system that offers unique possibilities to perform precise tests of the CPT symmetry. The entanglement of neutral kaon pairs that are produced at a ϕ -factory opens up new ways and scenarios in order to test this fundamental discrete symmetry. In this paper, the results of the most recent and significant CPT tests are reviewed. Experiments have set stringent limits on the CPT-violating parameters of different phenomenological models, some of them associated to possible decoherence mechanisms or Lorentz symmetry violation which might be justified in a quantum gravity framework. The present results show no violation of CPT symmetry, while their accuracy in some cases reaches the interesting level at which–in the most optimistic scenarios–quantum gravity effects might show up. [ABSTRACT FROM AUTHOR]

We explore the phase diagram and the modification of mesonic observables in a hot and dense medium using the (2 + 1) Polyakov-Nambu-Jona-Lasinio model. We present the phase diagram in the ( T , μ B) -plane, with its isentropic trajectories, paying special attention to the chiral critical end point (CEP). Chiral and deconfinement transitions are examined. The modifications of mesonic observables in the medium are explored as a tool to analyze the effective restoration of chiral symmetry for different regions of the phase diagram. It is shown that the meson masses, namely that of the kaons, change abruptly near the CEP, which can be relevant for its experimental search. [ABSTRACT FROM AUTHOR]