Anomalies in Field Theories With Extra Dimensions

Scrucca, Claudio A.; Serone, Marco

doi:10.1142/s0217751x04018518

Cited by 53 publications

(61 citation statements)

References 65 publications

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“…Although the 4D massless fermion spectrum of the model is anomaly free by construction, being identical to the SM spectrum, the 5D theory needs CS terms to restore 5D gauge invariance fully, because localized anomalies (globally vanishing in 4D once integrated over the internal space) appear at the UV and IR branes (see [58] for a review). 15 Recall that the warping does not alter the localization pattern of anomalies, which is then as in flat space [59].…”

Section: A Comment On Anomaliesmentioning

confidence: 99%

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Dark matter and electroweak symmetry breaking in models with warped extra dimensions

et al. 2008

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We show that a discrete exchange symmetry can give rise to realistic dark matter candidates in models with warped extra dimensions. We show how to realize our construction in a variety of models with warped extra dimensions and study in detail a realistic model of Gauge-Higgs Unification/composite Higgs in which the observed amount of dark matter is naturally reproduced. In this model, a realistic pattern of electroweak symmetry breaking typically occurs in a region of parameter space in which the fit to the electroweak precision observables improves, the Higgs is heavier than the experimental bound and new light quark resonances are predicted. We also quantify the fine-tuning of such scenarios, and discuss in which sense Gauge-Higgs Unification models result in a natural theory of electroweak symmetry breaking.

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Section: A Comment On Anomaliesmentioning

confidence: 99%

“…at the other end-point, which is equivalent to sending the other boundary to infinity (see e.g. [58] for a derivation of this result). Let us consider the UV brane, where both U (1) factors are unbroken, and focus on the possible anomalies involving the gauge field X − .…”

Section: A Comment On Anomaliesmentioning

confidence: 99%

Dark matter and electroweak symmetry breaking in models with warped extra dimensions

et al. 2008

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“…Anomalies of field theories on orbifolds are well understood [26], and also the sixdimensional case has been discussed in detail [21,27,28,22,29]. In general the orbifold anomaly has bulk and brane contributions.…”

Section: Anomaliesmentioning

confidence: 99%

Local SU(5) unification from the heterotic string

Buchmüller

Lüdeling

Schmidt

2007

J. High Energy Phys.

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We construct a 6D supergravity theory which emerges as intermediate step in the compactification of the heterotic string to the supersymmetric standard model in four dimensions. The theory has N = 2 supersymmetry and a gravitational sector with one tensor and two hypermultiplets in addition to the supergravity multiplet. Compactification to four dimensions occurs on a T 2 /Z 2 orbifold which has two inequivalent pairs of fixed points with unbroken SU(5) and SU(2) × SU(4) symmetry, respectively. All gauge, gravitational and mixed anomalies are cancelled by the Green-Schwarz mechanism. The model has partial 6D gauge-Higgs unification. Two quark-lepton generations are localized at the SU(5) branes, the third family is composed of split bulk hypermultiplets. The top Yukawa coupling is given by the 6D gauge coupling, all other Yukawa couplings are generated by higher-dimensional operators at the SU(5) branes. The presence of the SU(2)×SU(4) brane breaks SU(5) and generates split gauge and Higgs multiplets with N = 1 supersymmetry in four dimensions. The third generation is obtained from two split5-plets and two split 10-plets, which together have the quantum numbers of one5-plet and one 10-plet. This avoids unsuccessful SU(5) predictions for Yukawa couplings of ordinary 4D SU(5) grand unified theories.

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“…Since the two must describe a single spinor field on C, however, they must be related by Eq. (5.4), which implies n 1,2 to be related as 13) and consequently…”

Section: Massive Statesmentioning

confidence: 99%

Orbifold resolutions with general profile

Wulzer¹

2006

Class. Quantum Grav.

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A very general class of resolved versions of the C/Z N , T 2 /Z N and S 1 /Z 2 orbifolds is considered and the free theory of 6D chiral fermions studied on it.As the orbifold limit is taken, localized 4D chiral massless fermions are seen to arise at the fixed points. Their number, location and chirality is found to be independent on the detailed profile of the resolving space and to agree with the result of [1], in which a particular resolution was employed.As a consistency check of the resolution procedure, the massive equation is numerically studied. In particular, for S 1 /Z 2 , the "resolved" mass-spectrum and wave functions in the internal space are seen to correctly reproduce the usual orbifold ones, as the orbifold limit is taken.

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Anomalies in Field Theories With Extra Dimensions

Cited by 53 publications

References 65 publications

Dark matter and electroweak symmetry breaking in models with warped extra dimensions

Dark matter and electroweak symmetry breaking in models with warped extra dimensions

Local SU(5) unification from the heterotic string

Orbifold resolutions with general profile

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