arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv astro-ph/0509727astro-phgr-qchep-phhep-th
收藏

边界暴胀和WMAP数据

Boundary Inflation and the WMAP Data

Christophe Ringeval, Philippe Brax, Carsten van de Bruck, Anne-Christine Davis

摘要:

研究了具有两个边界膜的五维膜世界模型中的暴胀问题。我们利用模空间近似,由此低能理论简化为四维双标量张量引力加上最小耦合标量场。在详细分析暴胀解的基础上,我们导出了分离绝热模和两个熵模的线性微扰的演化方程。然后,我们研究了原始标量和张量功率谱,并表明它们的倾斜取决于标量张量耦合常数。最后,诱导CMB各向异性计算,我们提出了一个Monte Carlo马尔可夫链的参数空间探索使用的第一年WMAP数据。在95%的置信水平下,我们发现在通货膨胀结束时相关的爱丁顿参数的边缘化概率界1 - gamma < 0.002。这表明未来的CMB数据可以提供关键信息,帮助区分标量张量和标准通胀情景。

英文摘要:

Inflation in a five-dimensional brane world model with two boundary branes is studied. We make use of the moduli space approximation whereby the low energy theory reduces to a four-dimensional biscalar-tensor gravity plus a minimally coupled scalar field. After a detailed analysis of the inflationary solutions, we derive the evolution equations of the linear perturbations separating the adiabatic mode from two entropy modes. We then examine the primordial scalar and tensor power spectra and show that their tilt depends on the scalar-tensor coupling constant. Finally, the induced CMB anisotropies are computed and we present a Monte Carlo Markov Chains exploration of the parameter space using the first year WMAP data. We find a marginalized probability bound for the associated Eddington parameter at the end of inflation 1 - gamma < 0.002, at 95% confidence level. This suggests that future CMB data could provide crucial information helping to distinguish scalar-tensor and standard inflationary scenarios.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑