Perseas Christodoulidis, Jinn-Ouk Gong, Wei-Chen Lin, Maria Mylova, Misao Sasaki
{"title":"切尔-西蒙斯引力中交叉谱的新形状","authors":"Perseas Christodoulidis, Jinn-Ouk Gong, Wei-Chen Lin, Maria Mylova, Misao Sasaki","doi":"arxiv-2409.09935","DOIUrl":null,"url":null,"abstract":"Chern-Simons gravity is known to suffer from graviton ghost production during\ninflation, which suppresses the parity-violating power spectrum at scales\nrelevant to cosmic microwave background observations. In this work, we show\nthat allowing the initial conditions of inflation to deviate from the standard\nBunch-Davies state can enhance parity-violating non-Gaussianity in the\nscalar-tensor cross-bispectra. Our results reveal a significant additional\ncontribution to the cross-bispectra in the flattened configuration, offering a\nnew avenue to constrain parity-violating gravity.","PeriodicalId":501339,"journal":{"name":"arXiv - PHYS - High Energy Physics - Theory","volume":"53 1","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"New shape for cross-bispectra in Chern-Simons gravity\",\"authors\":\"Perseas Christodoulidis, Jinn-Ouk Gong, Wei-Chen Lin, Maria Mylova, Misao Sasaki\",\"doi\":\"arxiv-2409.09935\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Chern-Simons gravity is known to suffer from graviton ghost production during\\ninflation, which suppresses the parity-violating power spectrum at scales\\nrelevant to cosmic microwave background observations. In this work, we show\\nthat allowing the initial conditions of inflation to deviate from the standard\\nBunch-Davies state can enhance parity-violating non-Gaussianity in the\\nscalar-tensor cross-bispectra. Our results reveal a significant additional\\ncontribution to the cross-bispectra in the flattened configuration, offering a\\nnew avenue to constrain parity-violating gravity.\",\"PeriodicalId\":501339,\"journal\":{\"name\":\"arXiv - PHYS - High Energy Physics - Theory\",\"volume\":\"53 1\",\"pages\":\"\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2024-09-16\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"arXiv - PHYS - High Energy Physics - Theory\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/arxiv-2409.09935\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"arXiv - PHYS - High Energy Physics - Theory","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/arxiv-2409.09935","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
New shape for cross-bispectra in Chern-Simons gravity
Chern-Simons gravity is known to suffer from graviton ghost production during
inflation, which suppresses the parity-violating power spectrum at scales
relevant to cosmic microwave background observations. In this work, we show
that allowing the initial conditions of inflation to deviate from the standard
Bunch-Davies state can enhance parity-violating non-Gaussianity in the
scalar-tensor cross-bispectra. Our results reveal a significant additional
contribution to the cross-bispectra in the flattened configuration, offering a
new avenue to constrain parity-violating gravity.
京公网安备 11010802042870号
京ICP备2023020795号-1
分享
求助内容：
应助结果提醒方式：
扫码关注我们
