1,355,814 research outputs found
Arrêt 3 -L'ombilic de Sallanches - Le Fayet. Le complexe morainique des stades du Fayet (Le Fayet)
No full textLa conca di sovraescavazione glaciale di Sallanches, tra la soglia di Magland a valle e il verrou di Gurres a monte, ha registrato due importanti tappe délia deglaciazione, con due stadi a Magland e quattro stadi verso il Fayet. Questi stadi sono confermati dalla presenza di cordoni morenici laterali o da depositi di kame. Le fronti glaciali erano sommerse da specchi d'acqua generati successivamente al ritiro dei ghiacciai. Anche in questi casi, la pro-fondità dell 'acqua superava il centinaio di metri. Tutta l'organizzazione delle unità che colmano il fondovalle è controllata dalla dinamica lacustre.Nicoud Gérard, Coutterand Sylvain. Arrêt 3 -L'ombilic de Sallanches - Le Fayet. Le complexe morainique des stades du Fayet (Le Fayet) . In: Collection EDYTEM. Cahiers de géographie, numéro 3, 2005. Le quaternaire des vallées alpines. Fronts glaciaires, mouvements de versants et comblements dans les vallées de l'Arve, d'Aoste et de Suse. Livret-guide de l'excursion organisée par l'AFEQ du 2 au 4 juin 2005. pp. 33-36
FAYET (A.)
No full textDubois Patrick. FAYET (A.). In: Le dictionnaire de pédagogie et d'instruction primaire de Ferdinand Buisson : répertoire biographique des auteurs. Paris : Institut national de recherche pédagogique, 2002. p. 71. (Bibliothèque de l'Histoire de l'Education, 17
New Fayet-Iliopoulos terms in supergravity
No full textInternational audienceWe present a new type of Fayet-Iliopoulos (FI) terms in supergravity that do not require the gauging of the R-symmetry. We elaborate on the impact of such terms on the vacuum structure of the theory and compare their properties with the standard Fayet-Iliopoulos terms that arise from gaugings. In particular, we show that, with the use of the new FI terms, models with a single physical vector multiplet can be constructed that give stable de Sitter vacua
Citoyens, lisez et jugez. Une Singulière Leçon d'histoire . (Signé : Fayet.)
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Supersymmetric Born-Infeld actions and new Fayet-Iliopoulos terms
No full text© 2019, The Author(s). We consider N = 1 supersymmetric Born-Infeld actions that have a second non-linear supersymmetry. We focus on the model proposed by Bagger and Galperin and show that the breaking of the second supersymmetry is sourced by the new Fayet-Iliopoulos D-term. Interpreting such an action as the effective theory of a space-filling (anti) D3-brane leads to an expression for the new Fayet-Iliopoulos parameter in terms of the brane tension and α′.sponsorship: We thank Stefanos Katmadas, Alex Kehagias, Antoine Van Proeyen and Timm Wrase for discussions. The work of N.C. is supported by an FWF grant with the number P 30265. The work of F.F. is supported from the KU Leuven C1 grant ZKD1118 C16/16/005. The work of M.T. is supported by the FWO Odysseus Grant No. G.0.E52.14N. (FWF grant|P 30265, KU Leuven C1 grant|ZKD1118 C16/16/005, FWO Odysseus Grant|G.0.E52.14N)status: Publishe
Anomaly Cancellation in Supergravity with Fayet-Iliopoulos Couplings
No full textWe review and clarify the cancellation conditions for gauge anomalies which occur when N=1, D=4 supergravity is coupled to a Kahler non-linear sigma-model with gauged isometries and Fayet-Iliopoulos couplings. For a flat sigma-model target space and vanishing Fayet-Iliopoulos couplings, consistency requires just the conventional anomaly cancellation conditions. A consistent model with non-vanishing Fayet-Iliopoulos couplings is unlikely unless the Green-Schwarz mechanism is used. In this case the U(1) gauge boson becomes massive and the D-term potential receives corrections. A Green-Schwarz mechanism can remove both the abelian and certain non-abelian anomalies in models with a gauge non-invariant Kahler potential.We review and clarify the cancellation conditions for gauge anomalies which occur when N=1, D=4 supergravity is coupled to a Kahler non-linear sigma-model with gauged isometries and Fayet-Iliopoulos couplings. For a flat sigma-model target space and vanishing Fayet-Iliopoulos couplings, consistency requires just the conventional anomaly cancellation conditions. A consistent model with non-vanishing Fayet-Iliopoulos couplings is unlikely unless the Green-Schwarz mechanism is used. In this case the U(1) gauge boson becomes massive and the D-term potential receives corrections. A Green-Schwarz mechanism can remove both the abelian and certain non-abelian anomalies in models with a gauge non-invariant Kahler potential
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Fayet-Iliopoulos D terms in string theory
No full textOne loop scalar masses induced by Fayet-Ilipoulos D terms in string theory are calculated directly in the heterotic string theory for an arbitrary compactification which preserves space-time supersymmetry at the string tree level. The result is shown to be a total derivative in the moduli space of a torus with two punctures, and hence receives contribution only from the boundary of this moduli space
Fayet–Iliopoulos terms in supergravity and D-term inflation
No full textInternational audienceWe analyse the consequences of a new gauge invariant Fayet–Iliopoulos (FI) term proposed recently to a class of inflation models driven by supersymmetry breaking with the inflaton being the superpartner of the goldstino. We first show that charged matter fields can be consistently added with the new term, as well as the standard FI term in supergravity in a Kähler frame where the U(1) is not an R-symmetry. We then show that the slow-roll conditions can be easily satisfied with inflation driven by a D-term depending on the two FI parameters. Inflation starts at initial conditions around the maximum of the potential where the U(1) symmetry is restored and stops when the inflaton rolls down to the minimum describing the present phase of our Universe. The resulting tensor-to-scalar ratio of primordial perturbations can be even at observable values in the presence of higher order terms in the Kähler potential
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A Constrained Standard Model: Effects of Fayet-Iliopoulos Terms
No full textIn [1]the one Higgs doublet standard model was obtained by an orbifold projection of a 5D supersymmetric theory in an essentially unique way, resulting in a prediction for the Higgs mass m_H = 127 +- 8 GeV and for the compactification scale 1/R = 370 +- 70 GeV. The dominant one loop contribution to the Higgs potential was found to be finite, while the above uncertainties arose from quadratically divergent brane Z factors and from other higher loop contributions. In [3], a quadratically divergent Fayet-Iliopoulos term was found at one loop in this theory. We show that the resulting uncertainties in the predictions for the Higgs boson mass and the compactification scale are small, about 25percent of the uncertainties quoted above, and hence do not affect the original predictions. However, a tree level brane Fayet-Iliopoulos term could, if large enough, modify these predictions, especially for 1/R
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A Constrained Standard Model: Effects of Fayet-Iliopoulos Terms
No full textIn [1] the one Higgs doublet standard model was obtained by an orbifold projection of a 5D supersymmetric theory in an essentially unique way, resulting in a prediction for the Higgs mass m_H = 127 +- 8 GeV and for the compactification scale 1/R = 370 +- 70 GeV. The dominant one loop contribution to the Higgs potential was found to be finite, while the above uncertainties arose from quadratically divergent brane Z factors and from other higher loop contributions. In [3], a quadratically divergent Fayet-Iliopoulos term was found at one loop in this theory. We show that the resulting uncertainties in the predictions for the Higgs boson mass and the compactification scale are small, about 25percent of the uncertainties quoted above, and hence do not affect the original predictions. However, a tree level brane Fayet-Iliopoulos term could, if large enough, modify these predictions, especially for 1/R
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