Chinese Physics C > 2003, Vol. 27 > Issue(12): 1074-1078

A Study on the Effect of Reheating Energy Scale on CMB

Department of Physics,Peking University,Beijing 100871,China2 Institute of High Energy Physics,CAS,Beijing 100039,China

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Abstract：
Inflation plays a significant role in interpreting current observations. Despite the success of inflation theory, the reheating energy scale ρ _rehis largely uncertain today. This consequently induces uncertainty to the primordial spectrum when achieving primordial spectra from inflation models. In this paper, we study the effects of this uncertainty on the primordial spectrum and cosmic microwave background (CMB) radiation. For the primordial spectra with small running indices, our result shows that the effect is negligible if the inflation parameter V ₀can be normalized freely. But for models with large running indices, we find that ρ _rehcan be highly restricted by the CMB observations.

References

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GONG Xiao-Bo, FENG Bo and WANG Xiu-Lian. A Study on the Effect of Reheating Energy Scale on CMB[J]. Chinese Physics C, 2003, 27(12): 1074-1078.

GONG Xiao-Bo, FENG Bo and WANG Xiu-Lian. A Study on the Effect of Reheating Energy Scale on CMB[J]. Chinese Physics C, 2003, 27(12): 1074-1078. shu

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Received: 2003-05-09
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

A Study on the Effect of Reheating Energy Scale on CMB

Corresponding author:WANG Xiu-Lian,

Department of Physics,Peking University,Beijing 100871,China2 Institute of High Energy Physics,CAS,Beijing 100039,China

Received Date:2003-05-09
Accepted Date:1900-01-01
Available Online:2003-12-05

Abstract:Inflation plays a significant role in interpreting current observations. Despite the success of inflation theory, the reheating energy scale ρ_rehis largely uncertain today. This consequently induces uncertainty to the primordial spectrum when achieving primordial spectra from inflation models. In this paper, we study the effects of this uncertainty on the primordial spectrum and cosmic microwave background (CMB) radiation. For the primordial spectra with small running indices, our result shows that the effect is negligible if the inflation parameter V₀can be normalized freely. But for models with large running indices, we find that ρ_rehcan be highly restricted by the CMB observations.