Journal of Cosmology and Astroparticle Physics最新文献_第2页

No-scale Brans-Dicke gravity — ultralight scalar boson & heavy inflaton 无尺度布兰斯-迪克引力-超轻标量玻色子&重膨胀子

IF 6.4 2区物理与天体物理

Journal of Cosmology and Astroparticle Physics Pub Date : 2025-10-06 DOI: 10.1088/1475-7516/2025/10/032

Muzi Hong, Kyohei Mukaida and Tsutomu T. Yanagida

引用次数: 0

Perturbations in pseudo-Nambu-Goldstone Higgs inflation 伪南布-戈德斯通希格斯暴胀中的扰动

IF 6.4 2区物理与天体物理

Journal of Cosmology and Astroparticle Physics Pub Date : 2025-10-06 DOI: 10.1088/1475-7516/2025/10/036

Stephon Alexander, Humberto Gilmer and Cooper Niu

{"title":"Perturbations in pseudo-Nambu-Goldstone Higgs inflation","authors":"Stephon Alexander, Humberto Gilmer and Cooper Niu","doi":"10.1088/1475-7516/2025/10/036","DOIUrl":"https://doi.org/10.1088/1475-7516/2025/10/036","url":null,"abstract":"Pseudo-Nambu-Goldstone (pNG) Higgs Inflation is a novel approach to relate the Higgs boson and its interaction with Electroweak gauge bosons with cosmic inflation, with the potential of solving both the fine-tuning issues in the Higgs mass and inflationary potentials. In this work, we present a linear perturbation analysis of the minimal implementation of pNG Higgs inflation using the symmetry coset SU(5)/SO(5). Similar to Chromo-natural inflation, this model exhibits a period of instability in the tensor modes that exponentially enhance left-handed gravitational waves. Thus, large Chern-Simons couplings β ≳ 6 × 108 and decay constants f ≳ 1 × 1018 GeV are required to suppress the tensor-to-scalar ratio r to be compatible with the cosmic microwave background (CMB) measurement. These large couplings also cause an overproduction of the scalar modes, making the minimal construction of pNG Higgs inflation disfavored by CMB observations. However, this tension could potentially be relieved by considering multi-field inflation. The pNG Higgs construction naturally contains multiple scalar fields via the interplay of spontaneously broken global and gauge symmetries. The rich structure enables a broad range of multi-field inflation, and we conclude by briefly discussing this possibility and future work.","PeriodicalId":15445,"journal":{"name":"Journal of Cosmology and Astroparticle Physics","volume":"18 1","pages":""},"PeriodicalIF":6.4,"publicationDate":"2025-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145235535","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Testing quintessence axion dark energy with recent cosmological results 用最近的宇宙学结果测试典型轴子暗能量

IF 6.4 2区物理与天体物理

Journal of Cosmology and Astroparticle Physics Pub Date : 2025-10-06 DOI: 10.1088/1475-7516/2025/10/023

Weikang Lin, Luca Visinelli and Tsutomu T. Yanagida

{"title":"Testing quintessence axion dark energy with recent cosmological results","authors":"Weikang Lin, Luca Visinelli and Tsutomu T. Yanagida","doi":"10.1088/1475-7516/2025/10/023","DOIUrl":"https://doi.org/10.1088/1475-7516/2025/10/023","url":null,"abstract":"We investigate a quintessence axion model for dynamical dark energy, motivated in part by recent results from the Baryon Acoustic Oscillation (BAO) measurements of the Dark Energy Spectroscopic Instrument (DESI) combined with the cosmic microwave background anisotropies and the latest Type Ia supernovae (SNe Ia) data. By carefully treating the initial conditions and parameter sampling, we identify a preferred parameter space featuring a sub-Planckian axion decay constant and a relatively large axion mass, which naturally avoids the quality problem and remains consistent with the perturbative string conjecture. Our parameter scan also uncovers a trans-Planckian regime of theoretical interest, which is only mildly disfavored even by the strongest constraint. Finally, we discuss the possible connection between this model and the recently reported non-zero rotation of the CMB linear polarization angle, emphasizing the broader cosmological implications and the promising prospects for testing this scenario. We show that an 𝒪(1) electromagnetic anomaly coefficient is preferred by the strongest constraint, which is in full agreement with the minimal quintessence axion model.","PeriodicalId":15445,"journal":{"name":"Journal of Cosmology and Astroparticle Physics","volume":"107 1","pages":""},"PeriodicalIF":6.4,"publicationDate":"2025-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145235172","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

From fluctuation to polarization: imprints of 𝒪(1-10) Mpc-1 curvature perturbations in CMB B-modes from scalar-induced gravitational waves 从涨落到极化：尺度诱导引力波在CMB b模式中产生的（1-10）Mpc-1曲率扰动的印记

IF 6.4 2区物理与天体物理

Journal of Cosmology and Astroparticle Physics Pub Date : 2025-10-06 DOI: 10.1088/1475-7516/2025/10/034

Aurora Ireland, Kuver Sinha and Tao Xu

{"title":"From fluctuation to polarization: imprints of 𝒪(1-10) Mpc-1 curvature perturbations in CMB B-modes from scalar-induced gravitational waves","authors":"Aurora Ireland, Kuver Sinha and Tao Xu","doi":"10.1088/1475-7516/2025/10/034","DOIUrl":"https://doi.org/10.1088/1475-7516/2025/10/034","url":null,"abstract":"Probing primordial curvature perturbations on small scales, beyond those accessible using cosmic microwave background (CMB) primary anisotropies and Lyman-α forest data, remains a major open challenge. Current constraints on the scalar power spectrum at these scales are either weak (e.g. 𝒫ℛ ≲ 10-4 from CMB spectral distortions) or rely heavily on model-dependent assumptions about small-scale structure. In this work, we propose a novel method to probe the small-scale primordial power spectrum using scalar-induced tensor perturbations, which are inevitably sourced by curvature perturbations at second order in cosmological perturbation theory. While induced tensor modes have traditionally been studied in the context of the stochastic gravitational wave background, we highlight a complementary observable: the distinctive pattern of B-mode polarization they imprint on the CMB. We compute the angular spectrum of these B-modes arising from enhanced scalar perturbations and show that the resulting signal can be competitive with inflationary predictions for values of the tensor-to-scalar ratio targeted in upcoming CMB experiments, most notably CMB-Stage 4. We map the region of the scalar power spectrum to which these future B-mode experiments will be sensitive and compare with existing constraints, finding it to exceed current sensitivities at k ∼ 𝒪(1-10) Mpc-1. In addition to providing a new CMB-based probe of the small-scale power spectrum, this work also motivates dedicated B-mode searches at higher multipoles (ℓ ≳ 100).","PeriodicalId":15445,"journal":{"name":"Journal of Cosmology and Astroparticle Physics","volume":"94 1","pages":""},"PeriodicalIF":6.4,"publicationDate":"2025-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145235258","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The age of the universe with globular clusters. Part III. Gaia distances and hierarchical modeling 宇宙与球状星团的年龄。第三部分。盖亚距离和分层建模

IF 6.4 2区物理与天体物理

Journal of Cosmology and Astroparticle Physics Pub Date : 2025-10-06 DOI: 10.1088/1475-7516/2025/10/030

David Valcin, Raul Jimenez, Uroš Seljak and Licia Verde

{"title":"The age of the universe with globular clusters. Part III. Gaia distances and hierarchical modeling","authors":"David Valcin, Raul Jimenez, Uroš Seljak and Licia Verde","doi":"10.1088/1475-7516/2025/10/030","DOIUrl":"https://doi.org/10.1088/1475-7516/2025/10/030","url":null,"abstract":"This is the third article in a series aimed at computing accurate and precise ages of galactic globular clusters from their full color-magnitude diagram in order to estimate the age of the Universe and in turn constrain the cosmological model. We update previous constraints using additional data and an improved methodology which allows us to vary the helium abundance and the reddening law in addition to the usual parameters (age, metallicity, alpha enhancement, distance and absorption) in the analysis. Even with the additional degrees of freedom, using the full color-magnitude diagram, now described as a Gaussian mixture bayesian hierarchical model, a tight constraint on the age(s) of the globular clusters and on the other parameters can be obtained and the statistical errors are fully subdominant to the systematic errors. We find that the age of the oldest globular clusters is tGC = 13.39 ± 0.10 (stat.) ± 0.23 (sys.) Gyr, resulting in an age of the Universe tU = 13.57+0.16-0.14 (stat) ± 0.23 (sys.) and a robust 95% confidence upper limit of tU≤ = 13.92-0.1+0.13(stat) ± 0.23 (sys). This is fully compatible with our previous estimates and with the model-dependent, Cosmic Microwave Background-derived age for the Universe of tU = 13.8 ± 0.02 Gyr for a ΛCDM model.","PeriodicalId":15445,"journal":{"name":"Journal of Cosmology and Astroparticle Physics","volume":"111 1","pages":""},"PeriodicalIF":6.4,"publicationDate":"2025-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145235263","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Information wells and the emergence of primordial black holes in a cyclic quantum universe 信息井和循环量子宇宙中原始黑洞的出现

IF 6.4 2区物理与天体物理

Journal of Cosmology and Astroparticle Physics Pub Date : 2025-10-05 DOI: 10.1088/1475-7516/2025/10/021

Florian Neukart, Eike Marx and Valerii Vinokur

{"title":"Information wells and the emergence of primordial black holes in a cyclic quantum universe","authors":"Florian Neukart, Eike Marx and Valerii Vinokur","doi":"10.1088/1475-7516/2025/10/021","DOIUrl":"https://doi.org/10.1088/1475-7516/2025/10/021","url":null,"abstract":"Primordial black holes (PBHs) remain one of the most intriguing candidates for dark matter and a unique probe of physics at extreme curvatures. Here, we examine their formation in a bounce cosmology when the post-crunch universe inherits a highly inhomogeneous distribution of imprint entropy from the Quantum Memory Matrix (QMM). Within QMM, every Planck-scale cell stores quantum information about infalling matter; the surviving entropy field S(x) contributes an effective dust component T(QMM)μν = λ[(∇μS)(∇νS)-1/2gμν(∇S)2 + …] that deepens curvature wherever S is large. We show that (i) reasonable bounce temperatures and a QMM coupling λ ∼ 𝒪(1) naturally amplify these “information wells” until the density contrast exceeds the critical value δc ≃ 0.3; (ii) the resulting PBH mass spectrum spans 10-16M⊙–103M⊙, matching current microlensing and PTA windows; and (iii) the same mechanism links PBH abundance to earlier QMM explanations of dark matter and the cosmic matter-antimatter imbalance. Observable signatures include a mild blue tilt in small-scale power, characteristic μ-distortions, and an enhanced integrated Sachs-Wolfe signal — all of which will be tested by upcoming CMB, PTA, and lensing surveys.","PeriodicalId":15445,"journal":{"name":"Journal of Cosmology and Astroparticle Physics","volume":"100 1","pages":""},"PeriodicalIF":6.4,"publicationDate":"2025-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145228828","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Tribrid inflation, type II leptogenesis, and observable gravitational waves in supersymmetric SU(3) c × SU(2) L × SU(2) R × U(1) B-L ... 超对称星系SU(3) c × SU(2) L × SU(2) R × U(1) B-L中可观测到的引力波的混合暴胀、II型轻生…

IF 6.4 2区物理与天体物理

Journal of Cosmology and Astroparticle Physics Pub Date : 2025-10-02 DOI: 10.1088/1475-7516/2025/10/019

Waqas Ahmed, Saleh O. Allehabi, Farishta Israr and Mansoor Ur Rehman

引用次数: 0

Time non-locality in dark matter and LSS 暗物质和LSS中的时间非定域性

IF 6.4 2区物理与天体物理

Journal of Cosmology and Astroparticle Physics Pub Date : 2025-10-02 DOI: 10.1088/1475-7516/2025/10/018

Arhum Ansari, Arka Banerjee, Sachin Jain and Shaunak Padhyegurjar

引用次数: 0

The dark matter diffused supernova neutrino background 暗物质扩散了超新星中微子背景

IF 6.4 2区物理与天体物理

Journal of Cosmology and Astroparticle Physics Pub Date : 2025-10-02 DOI: 10.1088/1475-7516/2025/10/020

Garv Chauhan, R. Andrew Gustafson, Gonzalo Herrera, Taj Johnson and Ian M. Shoemaker

引用次数: 0

Robust cosmic shear with small-scale nulling 具有小尺度零化的强健宇宙剪切

IF 6.4 2区物理与天体物理

Journal of Cosmology and Astroparticle Physics Pub Date : 2025-10-02 DOI: 10.1088/1475-7516/2025/10/017

Giulia Piccirilli, Matteo Zennaro, Carlos García-García and David Alonso

{"title":"Robust cosmic shear with small-scale nulling","authors":"Giulia Piccirilli, Matteo Zennaro, Carlos García-García and David Alonso","doi":"10.1088/1475-7516/2025/10/017","DOIUrl":"https://doi.org/10.1088/1475-7516/2025/10/017","url":null,"abstract":"Standard cosmological weak lensing analyses using cosmic shear are inevitably sensitive to small-scale, non-linear clustering from low-redshift structures. The need to adequately model the clustering of matter on this non-linear regime, accounting for both gravitational and baryonic effects, adds significant uncertainty to weak lensing studies, particularly in the context of near-future Stage-IV datasets. In this paper, inspired by previous work on so-called “nulling” techniques, we present a general method that selects the linear combinations of a given tomographic cosmic shear dataset that are least sensitive to small-scale non-linearities, by essentially suppressing the contribution from low-redshift structures. We apply this method to the latest public cosmic shear data from the Dark Energy Survey, DES-Y3, that corresponds to 3 years of observation, and show: a) that a large fraction of the signal is dominated by the single mode that is most affected by non-linear scales, and b) that removing this mode leads to a ∼ 1σ upwards shift in the preferred value of S8 ≡ σ8√(ΩM/0.3), alleviating the tension with current CMB data. However, the removal of the most contaminated mode also results in a significant increase in the statistical uncertainties. Taking this into account, we find this shift to be compatible with a random fluctuation caused by removing this most-contaminated mode at the ∼ 1.4σ level. We also show that this technique may be used by future Stage-IV surveys to mitigate the sensitivity of the final constraints to baryonic effects, trading precision for robustness.","PeriodicalId":15445,"journal":{"name":"Journal of Cosmology and Astroparticle Physics","volume":"98 1","pages":""},"PeriodicalIF":6.4,"publicationDate":"2025-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145209628","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0