Analytic formulae for inflationary correlators with dynamical mass
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| Publicat a: | Journal of High Energy Physics vol. 2024, no. 3 (Mar 2024), p. 73 |
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| Altres autors: | , , |
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Springer Nature B.V.
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| Accés en línia: | Citation/Abstract Full Text - PDF |
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| 022 | |a 1029-8479 | ||
| 024 | 7 | |a 10.1007/JHEP03(2024)073 |2 doi | |
| 035 | |a 2963015357 | ||
| 045 | 2 | |b d20240301 |b d20240331 | |
| 084 | |a 243435 |2 nlm | ||
| 100 | 1 | |a Aoki, Shuntaro |u Institute for Basic Science, Particle Theory and Cosmology Group, Center for Theoretical Physics of the Universe, Daejeon, Korea (GRID:grid.410720.0) (ISNI:0000 0004 1784 4496) | |
| 245 | 1 | |a Analytic formulae for inflationary correlators with dynamical mass | |
| 260 | |b Springer Nature B.V. |c Mar 2024 | ||
| 513 | |a Journal Article | ||
| 520 | 3 | |a Massive fields can imprint unique oscillatory features on primordial correlation functions or inflationary correlators, which is dubbed the cosmological collider signal. In this work, we analytically investigate the effects of a time-dependent mass of a scalar field on inflationary correlators, extending previous numerical studies and implementing techniques developed in the cosmological bootstrap program. The time-dependent mass is in general induced by couplings to the slow-roll inflaton background, with particularly significant effects in the case of non-derivative couplings. By linearly approximating the time dependence, the mode function of the massive scalar is computed analytically, on which we derive analytic formulae for two-, three-, and four-point correlators with the tree-level exchange of the massive scalar. The obtained formulae are utilized to discuss the phenomenological impacts on the power spectrum and bispectrum, and it is found that the scaling behavior of the bispectrum in the squeezed configuration, i.e., the cosmological collider signal, is modified from a time-dependent Boltzmann suppression. By investigating the scaling behavior in detail, we are in principle able to determine the non-derivative couplings between the inflaton and the massive particle. | |
| 653 | |a Scalars | ||
| 653 | |a Approximation | ||
| 653 | |a Time dependence | ||
| 653 | |a Spacetime | ||
| 653 | |a Physics | ||
| 653 | |a Mathematical analysis | ||
| 653 | |a Theoretical physics | ||
| 653 | |a Correlation | ||
| 653 | |a Couplings | ||
| 653 | |a Derivatives | ||
| 653 | |a Universe | ||
| 653 | |a Cosmology | ||
| 700 | 1 | |a Noumi, Toshifumi |u The University of Tokyo, Graduate School of Arts and Sciences, Tokyo, Japan (GRID:grid.26999.3d) (ISNI:0000 0001 2169 1048) | |
| 700 | 1 | |a Sano, Fumiya |u Tokyo Institute of Technology, Department of Physics, Tokyo, Japan (GRID:grid.32197.3e) (ISNI:0000 0001 2179 2105); Cosmology, Gravity and Astroparticle Physics Group, Center for Theoretical Physics of the Universe, Institute for Basic Science, Daejeon, Korea (GRID:grid.410720.0) (ISNI:0000 0004 1784 4496) | |
| 700 | 1 | |a Yamaguchi, Masahide |u Cosmology, Gravity and Astroparticle Physics Group, Center for Theoretical Physics of the Universe, Institute for Basic Science, Daejeon, Korea (GRID:grid.410720.0) (ISNI:0000 0004 1784 4496); Tokyo Institute of Technology, Department of Physics, Tokyo, Japan (GRID:grid.32197.3e) (ISNI:0000 0001 2179 2105) | |
| 773 | 0 | |t Journal of High Energy Physics |g vol. 2024, no. 3 (Mar 2024), p. 73 | |
| 786 | 0 | |d ProQuest |t Advanced Technologies & Aerospace Database | |
| 856 | 4 | 1 | |3 Citation/Abstract |u https://www.proquest.com/docview/2963015357/abstract/embedded/6A8EOT78XXH2IG52?source=fedsrch |
| 856 | 4 | 0 | |3 Full Text - PDF |u https://www.proquest.com/docview/2963015357/fulltextPDF/embedded/6A8EOT78XXH2IG52?source=fedsrch |