8,906 research outputs found
Introduction to Physics
A short introduction to some current topics in physics is presented in
order to set the stage for some results to be announced at this Workshop. After
briefly reviewing the Cabibbo-Kobayashi-Maskawa (CKM) matrix and information on
its parameters, the decays of neutral mesons to several CP eigenstates, and
some decays, are discussed. It is shown that progress is being
made on determination of all the angles of the unitarity triangle.Comment: 12 pages, LaTeX, 7 figures plus photo, invited talk presented at
XXXVIII Rencontres de Moriond: Electroweak Interactions and Unified Theories,
Les Arcs, France, March 15-22, 2003. To be published in the Proceedings. More
typographic corrections; two figures improved furthe
Exotic states of matter in heavy meson decays
The potential of decays of mesons containing heavy quarks [including
mesons and the ] for producing final states of matter with
unusual quark configurations, such as or ,
is investigated. The usefulness of antineutron detection in such searches is
stressed.Comment: 15 pages, 8 figures, submitted to Phys. Rev. D. References and some
text adde
Hadron Spectroscopy - A 2005 Snapshot
Some aspects of hadron spectroscopy are reviewed as of summer 2005.Comment: 15 pages, 8 figures, invited talk presented at Physics in Collision
2005, Prague, Czech Republic, July 7-9, 2005. Proceedings to be published by
AIP. Uses AIP style files. Typo correcte
Resource Letter: The Standard Model and Beyond
This Resource Letter provides a guide to literature on the Standard Model of
elementary particles and possible extensions. In the successful theory of
quarks and leptons and their interactions, important questions remain, such as
the mechanism of electroweak symmetry breaking, the origin of quark and lepton
masses, the source of the baryon asymmetry of the Universe, and the makeup of
its matter and energy density. References are cited for quarks and leptons,
gauge theories, color and chromodynamics, weak interactions, electroweak
unification, CP violation, dynamics of heavy quarks, Higgs bosons, precision
electroweak measurements, supersymmetry, dynamical electroweak symmetry
breaking, composite quarks and leptons, grand unification and extended gauge
groups, string theories, large extra dimensions, neutrino masses, cosmic
microwave background radiation, dark matter, dark energy, accelerator
facilities, and non-accelerator experiments.Comment: 43 pages, LaTeX, no figures, to be published in Am. J. Phys.
References further updated to January 200
Two Topics in Physics
(1) A simple transversity analysis permits one to separate the P-even and
P-odd partial waves in such decays as and . This method is relevant to the separation of contributions of CP-even and
CP-odd final states in decays, and hence to the measurement of a possible
lifetime difference between mass eigenstates. (2) The enhancement of the decay rate due to four-fermion processes
is calculated in terms of the hyperfine splitting, the
hyperfine splitting, and the meson decay constant . Despite
a relatively large hyperfine splitting observed by the DELPHI Collaboration,
the mechanism falls far short of being able to explain the observed
enhancement.Comment: 11 pages, latex, no figures. Presented at 10th La Thuile Rencontre.
DESY preprint no. corrected in headin
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