Perturbations in generalized Galileon theories
We discuss the approaches by Deffayet et al. (DPSV) and Kobayashi et al. (KYY) to the analysis of linearized scalar perturbations about a spatially flat FLRW background in Horndeski theory. We identify additional, potentially important terms in the DPSV approach. However these terms vanish upon a ju...
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| Veröffentlicht in: | Physical review. D 2017-12, Vol.96 (12), Article 125012 |
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| container_title | Physical review. D |
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| creator | Kolevatov, R. Mironov, S. Rubakov, V. Sukhov, N. Volkova, V. |
| description | We discuss the approaches by Deffayet et al. (DPSV) and Kobayashi et al. (KYY) to the analysis of linearized scalar perturbations about a spatially flat FLRW background in Horndeski theory. We identify additional, potentially important terms in the DPSV approach. However these terms vanish upon a judicious gauge choice. We derive a gauge invariant quadratic action for metric and Galileon perturbations in L3 and L3+L4 theories and show that actions obtained in the DPSV and KYY approaches follow from this gauge invariant action in particular gauges. |
| doi_str_mv | 10.1103/PhysRevD.96.125012 |
| format | Article |
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(DPSV) and Kobayashi et al. (KYY) to the analysis of linearized scalar perturbations about a spatially flat FLRW background in Horndeski theory. We identify additional, potentially important terms in the DPSV approach. However these terms vanish upon a judicious gauge choice. We derive a gauge invariant quadratic action for metric and Galileon perturbations in L3 and L3+L4 theories and show that actions obtained in the DPSV and KYY approaches follow from this gauge invariant action in particular gauges.</description><identifier>ISSN: 2470-0010</identifier><identifier>EISSN: 2470-0029</identifier><identifier>DOI: 10.1103/PhysRevD.96.125012</identifier><language>eng</language><publisher>College Park: American Physical Society</publisher><subject>Gauges ; Invariants</subject><ispartof>Physical review. 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D</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Kolevatov, R.</au><au>Mironov, S.</au><au>Rubakov, V.</au><au>Sukhov, N.</au><au>Volkova, V.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Perturbations in generalized Galileon theories</atitle><jtitle>Physical review. D</jtitle><date>2017-12-26</date><risdate>2017</risdate><volume>96</volume><issue>12</issue><artnum>125012</artnum><issn>2470-0010</issn><eissn>2470-0029</eissn><abstract>We discuss the approaches by Deffayet et al. (DPSV) and Kobayashi et al. (KYY) to the analysis of linearized scalar perturbations about a spatially flat FLRW background in Horndeski theory. We identify additional, potentially important terms in the DPSV approach. However these terms vanish upon a judicious gauge choice. We derive a gauge invariant quadratic action for metric and Galileon perturbations in L3 and L3+L4 theories and show that actions obtained in the DPSV and KYY approaches follow from this gauge invariant action in particular gauges.</abstract><cop>College Park</cop><pub>American Physical Society</pub><doi>10.1103/PhysRevD.96.125012</doi></addata></record> |
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| title | Perturbations in generalized Galileon theories |
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