LiteBIRD 科学目标与预测：利用大尺度 CMB 偏振探究原初引力波起源的案例研究
宇宙学与河外天体物理
2025-03-25 v2 广义相对论与量子宇宙学
摘要
我们研究了利用 卫星 模巡天来约束在 CMB 角功率谱中产生特定特征的暴胀模型的可能性。我们探讨了一个特定模型示例，即旁观者轴子-SU(2) 规范场暴胀。该模型可通过由伪标量“类轴子”场在暴胀期间滚动数个 e-fold 所驱动的规范场涨落放大，产生宇称破缺的引力波。 sourced 引力波在再电离隆起尺度上可超出真空贡献约一个数量级，并在复合隆起尺度上与真空贡献相当。我们认为，具备全天空覆盖且能触及再电离隆起尺度的卫星任务，对于理解原初引力波信号的起源并区分两种产生机制——时空的量子真空涨落与暴胀期间的物质源——是必要的。我们给出了基于 卫星模拟的模型参数预期约束，其补充并拓展了文献中的先前研究。我们发现，若真实模型为在 CMB 尺度具有特征的轴子-SU(2) 模型，则 将能以高显著性排除标准单场慢滚模型（如 Starobinsky 模型）。我们进一步研究了利用该模型的宇称破缺特征（如 与 角功率谱）将其与标准单场慢滚情形区分开的可能性。我们发现， 的大部分判别能力将来自 角功率谱，而非 与 关联。
引用
@article{arxiv.2312.00717,
title = {LiteBIRD Science Goals and Forecasts. A Case Study of the Origin of Primordial Gravitational Waves using Large-Scale CMB Polarization},
author = {P. Campeti and E. Komatsu and C. Baccigalupi and M. Ballardini and N. Bartolo and A. Carones and J. Errard and F. Finelli and R. Flauger and S. Galli and G. Galloni and S. Giardiello and M. Hazumi and S. Henrot-Versillé and L. T. Hergt and K. Kohri and C. Leloup and J. Lesgourgues and J. Macias-Perez and E. Martínez-González and S. Matarrese and T. Matsumura and L. Montier and T. Namikawa and D. Paoletti and D. Poletti and M. Remazeilles and M. Shiraishi and B. van Tent and M. Tristram and L. Vacher and N. Vittorio and G. Weymann-Despres and A. Anand and J. Aumont and R. Aurlien and A. J. Banday and R. B. Barreiro and A. Basyrov and M. Bersanelli and D. Blinov and M. Bortolami and T. Brinckmann and E. Calabrese and F. Carralot and F. J. Casas and L. Clermont and F. Columbro and G. Conenna and A. Coppolecchia and F. Cuttaia and G. D'Alessandro and P. de Bernardis and M. De Petris and S. Della Torre and E. Di Giorgi and P. Diego-Palazuelos and H. K. Eriksen and C. Franceschet and U. Fuskeland and M. Galloway and M. Georges and M. Gerbino and M. Gervasi and T. Ghigna and C. Gimeno-Amo and E. Gjerløw and A. Gruppuso and J. Gudmundsson and N. Krachmalnicoff and L. Lamagna and M. Lattanzi and M. Lembo and A. I. Lonappan and S. Masi and M. Massa and S. Micheli and A. Moggi and M. Monelli and G. Morgante and B. Mot and L. Mousset and R. Nagata and P. Natoli and A. Novelli and I. Obata and L. Pagano and A. Paiella and V. Pavlidou and F. Piacentini and M. Pinchera and G. Pisano and G. Puglisi and N. Raffuzzi and A. Ritacco and A. Rizzieri and M. Ruiz-Granda and G. Savini and D. Scott and G. Signorelli and S. L. Stever and N. Stutzer and R. M. Sullivan and A. Tartari and K. Tassis and L. Terenzi and K. L. Thompson and P. Vielva and I. K. Wehus and Y. Zhou},
journal= {arXiv preprint arXiv:2312.00717},
year = {2025}
}
备注
22 pages, 13 figures. Published in JCAP 06 (2024) 008. Added comments at end of Sec. 6 reframing conclusions in more general way. Updated references