Production of massless fermions during inflation | Zendy

Tomislav Prokopec | Zendy; R. P. Woodard | Zendy

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Production of massless fermions during inflation

Author(s) -

Tomislav Prokopec,

R. P. Woodard

Publication year - 2003

Publication title -

journal of high energy physics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.998

H-Index - 261

eISSN - 1126-6708

pISSN - 1029-8479

DOI - 10.1088/1126-6708/2003/10/059

Subject(s) - fermion , massless particle , yukawa potential , physics , dirac fermion , fermion doubling , scalar (mathematics) , inflation (cosmology) , de sitter universe , scalar field , mathematical physics , quantum electrodynamics , particle physics , theoretical physics , quantum mechanics , universe , mathematics , geometry

We compute the one loop self energy, in a locally de Sitter background, for amassless fermion which is Yukawa-coupled to a massless, minimally coupledscalar. We then solve the modified Dirac equation resulting from inclusion ofthe self energy. We find faster-than-exponential growth in the fermion wavefunction, consistent with the production of fermions through a process in whicha scalar and a fermion-anti-fermion pair are ripped out of the vacuum byinflation.Comment: 17 pages, LaTeX 2e, 1 figure. The first 15 pages gives the text of version 1, which matches the published version. The erratum appended on page 15 corrects a crucial sign error which COMPLETELY CHANGES THE PHYSICAL CONCLUSION

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