Gravitino production in hybrid inflationary models

نویسندگان
چکیده

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Post-Inflationary Gravitino Production Revisited

We revisit gravitino production following inflation. As a first step, we review the standard calculation of gravitino production in the thermal plasma formed at the end of post-inflationary reheating when the inflaton has completely decayed. Next we consider gravitino production prior to the completion of reheating, assuming that the inflaton decay products thermalize instantaneously while they...

متن کامل

Gravitino production in the warm inflationary scenario

The warm inflation scenario [1] is an unusual variant on the inflationary cosmology, in which the inflaton has significant interactions during the inflationary epoch leading to a continuous production of radiation. The backreaction of this production on the inflaton field appears as a viscosity, slowing down the scalar field evolution and hence aiding slow-roll inflation [2]. In such a scenario...

متن کامل

The Gravitino-Overproduction Problem in Inflationary Universe

We show that the gravitino-overproduction problem is prevalent among inflation models in supergravity. An inflaton field φ generically acquires (effective) nonvanishing auxiliary field G Φ , if the Kähler potential is non-minimal. The inflaton field then decays into a pair of the gravitinos. We extensively study the cosmological constraints on G Φ for a wide range of the gravitino mass. For man...

متن کامل

Gravitino dark matter in hybrid gauge - gravity models

We study the phenomenology of generic supergravity models in which gravity mediation naturally competes with gauge mediation as the origin of supergravity-breaking. This class of hybrid models has been recently motivated in string inspired constructions and differs from usual gauge mediated supersymmetry breaking models in having messenger masses of order of the GUT scale. In these scenarios th...

متن کامل

Gravitino Production in the Inflationary Universe and the Effects on Big-Bang Nucleosynthesis

Gravitino production and decay in the inflationary universe are reexamined. Assuming that the gravitino mainly decays into a photon and a photino, we calculate the upperbound on the reheating temperature. Compared to previous works, we have essentially improved the following two points: (i) the helicity ±32 gravitino production cross sections are calculated by using the full relevant terms in t...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: Physical Review D

سال: 2000

ISSN: 0556-2821,1089-4918

DOI: 10.1103/physrevd.62.083510