In this overview, I discuss some of the open issues in Kaon physics. After briefly touching on la... more In this overview, I discuss some of the open issues in Kaon physics. After briefly touching on lattice calculations of Kaon dynamics and tests of CPT, my main focus of attention is on epsilon prime over epsilon and on constraints on the CKM model. The impact of rare K- decays and of experiments with B-mesons for addressing the issue of CP-violation is also discussed. The importance of looking for signals of flavor-conserving CP violating phases is emphasized.
This review of CP violation focuses on the status of the subject and its likely future developmen... more This review of CP violation focuses on the status of the subject and its likely future development through experiments in the Kaon system and with B-decays. Although present observations of CP violation are perfectly consistent with the CKM model, we discuss the theoretical and experimental difficulties which must be faced to establish this conclusively. In so doing, theoretical predictions and experimental prospects for detecting $\Delta S=1$ CP violation through measurements of $\epsilon^\prime/\epsilon$ and of rare K decays are reviewed. The crucial role that B CP-violating experiments will play in elucidating this issue is emphasized . The importance of looking for evidence for non-CKM CP-violating phases, through a search for a non-vanishing transverse muon polarization in $K_{\mu 3}$ decays, is also stressed.
Simple ``unitarity inspired'' relations between two- and three-body lepton flavor violating decay... more Simple ``unitarity inspired'' relations between two- and three-body lepton flavor violating decays are noted and discussed. In the absence of cancellations, the existing strong bounds on μ-->3e and μ-->eγγ severely constrain two-body lepton flavor violating decays.
In these lectures I describe some of the open questions in the standard model relating to the nat... more In these lectures I describe some of the open questions in the standard model relating to the nature and origin of mass, forces and matter and discuss some of the speculative theoretical ideas put forth in this regard. Some of the topics touched upon include supsersymmetry, dynamical symmetry breaking, composite models, grand unified theories and superstrings.
The necessary complex structures needed for CP violation are not easy to generate and, indeed, CP... more The necessary complex structures needed for CP violation are not easy to generate and, indeed, CP can be a symmetry in higher dimensional theories. In 4-dimensions CP violation argues for the existence of a scalar sector and, in its simplest manifestation, leads to the CKM model. Further CP violating phases, from an extended scalar sector, are constrained by the requirement of having no FCNC. Although new CP violating phases are expected in SUSY extensions of the SM, the good agreement of data with the CKM model only provides bounds on these phases. Baryogenesis via leptogenesis requires the presence of CP violating phases in the neutrino sector. However, the CP phases likely to be eventually meausured experimentally are not necessarily directly connected to the ones which drive the leptogenesis.
An overview is given of theoretical attempts to explain the matter-antimatter asymmetry in the Un... more An overview is given of theoretical attempts to explain the matter-antimatter asymmetry in the Universe, emphasizing particularly leptogenesis and the Affleck-Dine mechanism.
In this overview, I discuss some of the open issues in Kaon physics. After briefly touching on la... more In this overview, I discuss some of the open issues in Kaon physics. After briefly touching on lattice calculations of Kaon dynamics and tests of CPT, my main focus of attention is on epsilon prime over epsilon and on constraints on the CKM model. The impact of rare K- decays and of experiments with B-mesons for addressing the issue of CP-violation is also discussed. The importance of looking for signals of flavor-conserving CP violating phases is emphasized.
This review of CP violation focuses on the status of the subject and its likely future developmen... more This review of CP violation focuses on the status of the subject and its likely future development through experiments in the Kaon system and with B-decays. Although present observations of CP violation are perfectly consistent with the CKM model, we discuss the theoretical and experimental difficulties which must be faced to establish this conclusively. In so doing, theoretical predictions and experimental prospects for detecting $\Delta S=1$ CP violation through measurements of $\epsilon^\prime/\epsilon$ and of rare K decays are reviewed. The crucial role that B CP-violating experiments will play in elucidating this issue is emphasized . The importance of looking for evidence for non-CKM CP-violating phases, through a search for a non-vanishing transverse muon polarization in $K_{\mu 3}$ decays, is also stressed.
Simple ``unitarity inspired'' relations between two- and three-body lepton flavor violating decay... more Simple ``unitarity inspired'' relations between two- and three-body lepton flavor violating decays are noted and discussed. In the absence of cancellations, the existing strong bounds on μ-->3e and μ-->eγγ severely constrain two-body lepton flavor violating decays.
In these lectures I describe some of the open questions in the standard model relating to the nat... more In these lectures I describe some of the open questions in the standard model relating to the nature and origin of mass, forces and matter and discuss some of the speculative theoretical ideas put forth in this regard. Some of the topics touched upon include supsersymmetry, dynamical symmetry breaking, composite models, grand unified theories and superstrings.
The necessary complex structures needed for CP violation are not easy to generate and, indeed, CP... more The necessary complex structures needed for CP violation are not easy to generate and, indeed, CP can be a symmetry in higher dimensional theories. In 4-dimensions CP violation argues for the existence of a scalar sector and, in its simplest manifestation, leads to the CKM model. Further CP violating phases, from an extended scalar sector, are constrained by the requirement of having no FCNC. Although new CP violating phases are expected in SUSY extensions of the SM, the good agreement of data with the CKM model only provides bounds on these phases. Baryogenesis via leptogenesis requires the presence of CP violating phases in the neutrino sector. However, the CP phases likely to be eventually meausured experimentally are not necessarily directly connected to the ones which drive the leptogenesis.
An overview is given of theoretical attempts to explain the matter-antimatter asymmetry in the Un... more An overview is given of theoretical attempts to explain the matter-antimatter asymmetry in the Universe, emphasizing particularly leptogenesis and the Affleck-Dine mechanism.
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Papers by Roberto Peccei