178 research outputs found
Legal Aspects of SIDS
My remarks today focus on four legal aspects of SIDS; the first three are problems of long standing and the fourth is less well recognized, an immediate problem to some but more of a cloud on the horizon to others. At the outset, I want to emphasize that I bring you no certain solutions. Rather my more modest objective is to provide a focus and framework for further discussions
Supersymmetry and Unification: Heavy Top Was the Key
I review the unification of gauge couplings of strong, weak and
electro-magnetic interactions. I start by recalling the history of the most
important prediction of low-energy supersymmetry: the correct value of the weak
mixing angle tied to a large top quark mass. I then turn to the discussion of
the present day situation of the minimal supersymmetric Grand Unified Theories
based on SU(5) and SO(10) groups, and I show why the minimal SU(5) is in accord
with experiment. For the sake of completeness I also summarize the problems and
possible solutions of the minimal ordinary SU(5). One version, based on the
minimal Georgi-Glashow model, augmented by the adjoint fermion, predicts a
light fermion triplet to lie below TeV or so. Its (lepton number violating)
decays offer a hope of probing neutrino (Majorana) masses and mixings at the
LHC.Comment: To be published in the proceedings of the Scientific and Human Legacy
of Julius Wess, Memorial Workshop held in Donji Milanovac, Serbia, August
201
Federal Reserve: William McChesney Martin Jr. : a reevaluation
Federal Reserve System ; Executives
Deadly complication of norepinephrine
"Symmetrical peripheral gangrene is a life-threatening complication of norepinephrine which is associated with a high mortality rate (up to 40[percent]). It presents as bilateral distal limb gangrene without evidence of large-vessel obstruction or vasculitis."--IntroductionFarzana Hoque (Department of Medicine, Saint Louis University)Includes bibliographical reference
Persistent Challenges of Quantum Chromodynamics
Unlike some models whose relevance to Nature is still a big question mark,
Quantum Chromodynamics will stay with us forever. Quantum Chromodynamics (QCD),
born in 1973, is a very rich theory supposed to describe the widest range of
strong interaction phenomena: from nuclear physics to Regge behavior at large
E, from color confinement to quark-gluon matter at high densities/temperatures
(neutron stars); the vast horizons of the hadronic world: chiral dynamics,
glueballs, exotics, light and heavy quarkonia and mixtures thereof, exclusive
and inclusive phenomena, interplay between strong forces and weak interactions,
etc. Efforts aimed at solving the underlying theory, QCD, continue. In a
remarkable entanglement, theoretical constructions of the 1970s and 1990s
combine with today's ideas based on holographic description and strong-weak
coupling duality, to provide new insights and a deeper understanding.Comment: Julius Edgar Lilienfeld Prize Lecture at the April Meeting of APS,
Dallas, TX, April 22-25, 2006; v.2: reference added; v.3: reference adde
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