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• W4384108223 abstract "We revisit a cosmological scenario based on the classically conformal $U(1)_{B-L}$-extension of the Standard Model. Our focus is on the mechanism of reheating after inflation and the constraints on the model parameters. In this scenario, the inflationary dynamics is driven by the $U(1)_{B-L}$ Higgs field that is nonminimally coupled to gravity and breaks the $U(1)_{B-L}$ symmetry spontaneously as it acquires a vacuum expectation value through the Coleman-Weinberg mechanism. It is found that the reheating process proceeds stepwise, and as the decay channels of the $U(1)_{B-L}$ Higgs field are known, the reheating temperature is evaluated. The relation between the e-folding number of inflation and the reheating temperature provides a strong consistency condition on the model parameters, and we find that the recent cosmological data gives an upper bound on the $U(1)_{B-L}$ breaking scale $v_{BL}lesssim 10^{12}$ GeV. The lower bound is $v_{BL}gtrsim 10^6$ GeV, obtained as the condition for successful reheating in this model. The prediction for the cosmic microwave background (CMB) spectrum of this model fits extremely well with today's cosmological data. The model can be tested and is falsifiable by near future CMB observations, including the LiteBIRD and CMB-S4." @default.
• W4384108223 created "2023-07-13" @default.
• W4384108223 creator A5027560677 @default.
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• W4384108223 date "2023-07-12" @default.
• W4384108223 modified "2023-10-18" @default.
• W4384108223 title "Reheating consistency condition on the classically conformal <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:mi>U</mml:mi><mml:mo stretchy=false>(</mml:mo><mml:mn>1</mml:mn><mml:msub><mml:mrow><mml:mo stretchy=false>)</mml:mo></mml:mrow><mml:mrow><mml:mi>B</mml:mi><mml:mo>–</mml:mo><mml:mi>L</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math> Higgs inflation model" @default.
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• W4384108223 doi "https://doi.org/10.1103/physrevd.108.015013" @default.
• W4384108223 hasPublicationYear "2023" @default.
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