Inflation versus the Cosmological Moduli Problem
نویسنده
چکیده
We show that in generic supergravity theories the mass of the moduli during inflation is larger (or at least of the same order of magnitude) than the Hubble constant. This fact does not depends on the details of the inflation and on the value of the Hubble parameter during it. The reason is that inflationary universe is dominated by large F -term (or D-term) density which is higher than the SUSY breaking scale in the present minimum and stabilizes the flat directions of the supersymmetric vacua. Therefore, in general even standard inflationary scenarios (with large H) may solve the cosmological moduli problem. ∗Permanent address: Institute of Physics, Georgian Academy of Sciences, 380077 Tbilisi, Georgia. E-mail: [email protected]
منابع مشابه
Cosmological Moduli Problem and Oscillating Inflation in Gauge-Mediated Supersymmetry Breaking
We investigate cosmological moduli problem in the gauge-mediated supersymmetry breaking (GMSB). A mini-inflation (oscillating inflation) takes place when a scalar field corresponding to the flat direction in GMSB oscillates along the logarithmic potential induced by the gauge-mediation mechanism. It is shown that this oscillating inflation can sufficiently dilute the relic abundance of the stri...
متن کاملCosmological Moduli Problem and Thermal Inflation Models
In superstring theories, there exist various dilaton and modulus fields which masses are expected to be of the order of the gravitino mass m3/2. These fields lead to serious cosmological difficulties, so called “cosmological moduli problem”, because a large number of moduli particles are produced as the coherent oscillations after the primordial inflation. We make a comprehensive study whether ...
متن کاملRelaxing the cosmological moduli problem.
Typically the moduli fields acquire mass mφ = ±C H in the early universe, which shifts the position of the minimum of their effective potential and leads to an excessively large energy density of the oscillating moduli fields at the later stages of the evolution of the universe. This constitutes the cosmological moduli problem, or Polonyi field problem. We show that the cosmological moduli prob...
متن کاملSolving the Cosmological Moduli Problem with Weak Scale Inflation
Many models of supersymmetry breaking involve particles with weak scale mass and Planck mass suppressed couplings. Coherent production of such particles in the early universe destroys the successful predictions of nucleosynthesis. We show that this problem may be solved by a brief period of weak scale inflation. Furthermore the inflaton potential for such an inflation naturally arises from the ...
متن کاملCosmological Moduli Problem in Gauge-mediated Supersymmetry Breaking Theories
A generic class of string theories predicts the existence of light moduli fields, and they are expected to have masses mφ comparable to the gravitino mass m3/2 which is in a range of 10 −2keV–1GeV in gauge-mediated supersymmetry breaking theories. Such light fields with weak interactions suppressed by the Planck scale can not avoid some stringent cosmological constraints, that is, they suffer f...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2008