We consider equation image supergravity theories that have the same spectrum as the R + R2 supergravity, as predicted from the off-shell counting of degrees of freedom. These theories describe standard equation image supergravity coupled to one or two long massive vector multiplets. The central charge is not gauged in these models and they have a Minkowski vacuum with equation image unbroken supersymmetry. The gauge symmetry, being non-compact, is always broken. α-deformed inflaton potentials are obtained, in the case of a single massive vector multiplet, with α = 1/3 and 2/3. The α = 1 potential (i.e. the Starobinsky potential) is also obtained, but only at the prize of having a single massive vector and a residual unbroken gauge symmetry. The inflaton corresponds to one of the Cartan fields of the non-compact quaternionic-Kähler cosets.

A search for an N=2 inflaton potential / A., Ceresole; G., Dall'Agata; S., Ferrara; Trigiante, Mario; A., Van Proeyen. - In: FORTSCHRITTE DER PHYSIK. - ISSN 0015-8208. - STAMPA. - 62:7(2014), pp. 584-606. [10.1002/prop.201400019]

A search for an N=2 inflaton potential

TRIGIANTE, MARIO;
2014

Abstract

We consider equation image supergravity theories that have the same spectrum as the R + R2 supergravity, as predicted from the off-shell counting of degrees of freedom. These theories describe standard equation image supergravity coupled to one or two long massive vector multiplets. The central charge is not gauged in these models and they have a Minkowski vacuum with equation image unbroken supersymmetry. The gauge symmetry, being non-compact, is always broken. α-deformed inflaton potentials are obtained, in the case of a single massive vector multiplet, with α = 1/3 and 2/3. The α = 1 potential (i.e. the Starobinsky potential) is also obtained, but only at the prize of having a single massive vector and a residual unbroken gauge symmetry. The inflaton corresponds to one of the Cartan fields of the non-compact quaternionic-Kähler cosets.
File in questo prodotto:
Non ci sono file associati a questo prodotto.
Pubblicazioni consigliate

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/2588217
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo