منابع مشابه
Grand unification and heavy axion
We argue that sufficiently complex grand unified theories involving extra strong intractions that confine at very short distances, may lead to a heavy axion solution of the CP problem of QCD. This axion may have a mass within accessible energy range, and its low energy interactions emerge through mixing with axial Higgs boson(s). Another signature of this scenario is softly broken Peccei—Quinn ...
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Banks and Dine have recently shown that the M theory naturally accommodates the Peccei-Quinn axion. Since the decay constant F a of the axion is large as F a ≃ 10 15 − 10 16 GeV, the halo axion is hardly detected in coming axion-search experiments. However, we show that isocurvature fluctuations of the M-theory axion produced at the inflationary epoch are most likely detectable in future satell...
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In spite of all the successes of the Standard Model [SM] it is unlikely to be the final theory. It leaves many unanswered questions. Why the local gauge interactions SU(3)C × SU(2)L × U(1)Y and why 3 families of quarks and leptons? Moreover why does one family consist of the states [Q, u, d; L, e] transforming as [(3, 2, 1/3), (3̄, 1,−4/3), (3̄, 1, 2/3); (1, 2,−1), (1, 1, 2)], where Q = (u, d) an...
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I review how traditional grand unified theories, which require adjoint (or higher representation) Higgs fields for breaking to the standard model, can be contained within string theory. The status (as of January 1996) of the search for stringy free fermionic three generation SO(10) SUSY–GUT models is discussed. Progress in free fermionic classification of both SO(10)2 charged and uncharged embe...
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We investigate a construction of five-dimensional (5D) grand unified theories (GUTs) on an interval, which we call iGUTs. We analyze supersymmetric SO(10) iGUT as an example, where the gauge multiplet is spread over the 5D bulk. The SO(10) is directly reduced to the standard model gauge symmetry through the interval boundary conditions. Notice that this rank reduction is impossible in case of G...
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ژورنال
عنوان ژورنال: Physics Letters B
سال: 1981
ISSN: 0370-2693
DOI: 10.1016/0370-2693(81)90540-2