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This book addresses the confinement problem, which concerns the
behavior of non-abelian gauge theories, and the force which is
mediated by gauge fields, at large distances. The word
"confinement" in the context of hadronic physics originally
referred to the fact that quarks and gluons appear to be trapped
inside mesons and baryons, from which they cannot escape. There are
other, and possibly deeper meanings that can be attached to the
term, and these will be explored in this book. Although the
confinement problem is far from solved, much is now known about the
general features of the confining force, and there are a number of
very well motivated theories of confinement which are under active
investigation. This volume gives a both pedagogical and concise
introduction and overview of the main ideas in this field, their
attractive features, and, as appropriate, their shortcomings. This
second edition summarizes some of the developments in this area
which have occurred since the first edition of this book appeared
in 2011. These include new results in the caloron/dyon picture of
confinement, in functional approaches, and in studies of the
Yang-Mills vacuum wave functional. Special attention, in two new
chapters, is given to recent numerical investigations of the center
vortex theory, and to the varieties of confinement which may exist
in gauge-Higgs theories. Reviews of the first edition: "This is
indeed a very good book. I enjoyed reading it and... I learned a
lot from it.... It is definitely a research book that provides
readers with a guide to the most updated confinement models."
(Giuseppe Nardelli, Mathematical Reviews, Issue 2012 d) "The book
is beautifully produced with special emphasis on the relevance of
center symmetry and lattice formulation as well as an introduction
to current research on confinement." (Paninjukunnath Achuthan,
Zentralblatt MATH, Vol. 1217, 2011)
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