GUT baryogenesis after preheating: Numerical study of the production and decay of X bosons

Kolb, Edward W.; Riotto, Antonio; Tkachev, Igor I.

doi:10.1016/S0370-2693(98)00134-8

GUT baryogenesis after preheating: Numerical study of the production and decay of X bosons

Edward W. Kolb
(
- Fermilab and
- Chicago U., EFI
)
,
Antonio Riotto
(
- CERN
)
,
Igor I. Tkachev
(
- Purdue U. and
- Moscow, INR
)

Jan, 1998

13 pages

Published in:

Phys.Lett.B 423 (1998) 348-354

e-Print:

hep-ph/9801306 [hep-ph]

DOI:

10.1016/S0370-2693(98)00134-8

Report number:

FERMILAB-PUB-97-433-A,
CERN-TH-97-376,
PURD-TH-98-01,
OUTP-97-77-P

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Abstract:

We perform a fully non-linear calculation of the production of supermassive Grand Unified Theory (GUT)

X

bosons during preheating, taking into account the fact that they are unstable with a decay width

\Gamma_X

. We show that parametric resonance does not develop if

\Gamma_X

is larger than about

10^{-2} m_X

. We compute the nonthermal number density of superheavy bosons produced in the preheating phase and demonstrate that the observed baryon asymmetry may be explained by GUT baryogenesis after preheating if

\Gamma_X

is smaller than about

10^{-3} m_X

.

Note:

13 pages, LaTeX file, 3 figures. One reference added and minor changes Report-no: FERMILAB-Pub-97/433-A, CERN-TH/97-376

98.80.Cq
inflation
grand unified theory
boson: massive
boson: production
boson: width
boson: density
baryon: asymmetry
Hartree approximation
resonance

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