arXiv - PHYS - High Energy Physics - Phenomenology最新文献_第5页

Minimally coupled $β$-exponential inflation with an $R^2$ term in the Palatini formulation 帕拉蒂尼公式中带有 $R^2$ 项的最小耦合 $β$ 指数通货膨胀

arXiv - PHYS - High Energy Physics - Phenomenology Pub Date : 2024-09-16 DOI: arxiv-2409.10398

Nilay Bostan, Rafid H. Dejrah

{"title":"Minimally coupled $β$-exponential inflation with an $R^2$ term in the Palatini formulation","authors":"Nilay Bostan, Rafid H. Dejrah","doi":"arxiv-2409.10398","DOIUrl":"https://doi.org/arxiv-2409.10398","url":null,"abstract":"We focus on the inflationary predictions of $beta$-exponential potential\u0000models, in which the inflaton is a representation of the field delineating the\u0000size of extra-dimension. Since it offers a well-motivated starting point for\u0000the study of physics at very high energies, we incorporate an $R^2$ term in the\u0000Palatini gravity. In addition, afterward the inflation, the inflaton oscillates\u0000about the minimum of the inflation potential, and reheats the universe. This\u0000occurs during the reheating phase, at which the inflaton decays into the\u0000standard model particles, which fill the universe. We extend our examination by\u0000considering the reheating effects on inflationary observables by employing the\u0000different scenarios of the reheat temperature. Supposing the standard thermal\u0000history after inflation, we display the inflationary predictions, $n_s, r,\u0000mathrm{d}n_s/mathrm{d}ln k$ of $beta$-exponential potential with minimal\u0000coupling in Palatini $R^2$ gravity. Also, different kinds of constraints from a\u0000variety of observations, such as BICEP/Keck, Planck 2018, as well as future\u0000possible detectable sensitivities that might be reached by CMB experiments:\u0000CMB-S4 and LiteBIRD are taken into account in this work. We indicate that our\u0000results are consistent with both the latest data and the future sensitivity\u0000forecasts of LiteBIRD/Planck and CMB-S4. Finally, the results in this study\u0000highlight the viability of our model even in the case of the existence of more\u0000stringent constraints expected from future achievable confidence level limits.","PeriodicalId":501067,"journal":{"name":"arXiv - PHYS - High Energy Physics - Phenomenology","volume":"17 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142258927","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Neutrino theory: open questions and future opportunities 中微子理论：未决问题与未来机遇

arXiv - PHYS - High Energy Physics - Phenomenology Pub Date : 2024-09-16 DOI: arxiv-2409.09992

Raymond R. Volkas

引用次数: 0

A Common Origin for Nano-Hz Gravitational Wave Background and Black Hole Merger Events 纳赫兹引力波背景与黑洞合并事件的共同起源

arXiv - PHYS - High Energy Physics - Phenomenology Pub Date : 2024-09-16 DOI: arxiv-2409.10251

Bo-Qiang Lu, Cheng-Wei Chiang, Tianjun Li

引用次数: 0

Photon Ring Dimming as a Signature of Photon-Axion Conversion in Janis-Newman-Winicour Naked Singularity 作为杰尼斯-纽曼-维尼柯裸奇点中光子-阿克塞转换特征的光子环暗化

arXiv - PHYS - High Energy Physics - Phenomenology Pub Date : 2024-09-15 DOI: arxiv-2409.09802

Ayush Hazarika, Premachand Mahapatra, Subhadip Sau

引用次数: 0

Revealing the $q^2$ dependence in $b to s μ^+ μ^-$ baryonic decay modes 揭示 $b to s μ^+ μ^-$ 重子衰变模式中的 $q^2$ 相关性

arXiv - PHYS - High Energy Physics - Phenomenology Pub Date : 2024-09-15 DOI: arxiv-2409.09737

Ajay Kumar Yadav, Manas Kumar Mohapatra, Suchismita Sahoo

引用次数: 0

Evolution of unpolarized transverse momentum dependent parton distributions of twist-3 扭转-3 的非极化横动量相关部分子分布的演变

arXiv - PHYS - High Energy Physics - Phenomenology Pub Date : 2024-09-15 DOI: arxiv-2409.09667

Ping-An Liu, Xue-Tao Liu, Yu-Lu Liu, An-Ping Chen

引用次数: 0

Two-loop QED/QCD corrections for polarized $γγrightarrowγγ$ process in SANCphot SANCphot中极化$γγrightarrowγγ$过程的QED/QCD二环修正

arXiv - PHYS - High Energy Physics - Phenomenology Pub Date : 2024-09-15 DOI: arxiv-2409.09640

Serge Bondarenko, Aidos Issadykov, Lidia Kalinovskaya, Andrey Sapronov, Diana Seitova

引用次数: 0

More is Different: Multi-Axion Dynamics Changes Topological Defect Evolution 越多越不同多轴向动力学改变拓扑缺陷演化

arXiv - PHYS - High Energy Physics - Phenomenology Pub Date : 2024-09-15 DOI: arxiv-2409.09749

Junseok Lee, Kai Murai, Fuminobu Takahashi, Wen Yin

{"title":"More is Different: Multi-Axion Dynamics Changes Topological Defect Evolution","authors":"Junseok Lee, Kai Murai, Fuminobu Takahashi, Wen Yin","doi":"arxiv-2409.09749","DOIUrl":"https://doi.org/arxiv-2409.09749","url":null,"abstract":"We study topological defects in multi-axion models arising from multiple\u0000Peccei-Quinn (PQ) scalars. Using a simplified two-axion system, we reveal\u0000fundamental differences in the evolution of these defects compared to\u0000single-axion scenarios. This finding is particularly significant because,\u0000despite the fact that integrating out heavier axions reduces these models to an\u0000effective single PQ scalar theory at low energies, the actual physical behavior\u0000of topological defects differs markedly from single-axion predictions. Unlike\u0000single-axion models where conventional cosmic strings form, multi-axion\u0000scenarios with post-inflationary or mixed initial conditions generically\u0000produce networks of strings interconnected by high-tension domain walls. This\u0000results in a severe cosmological domain wall problem. We determine string-wall\u0000network instability conditions and discuss cosmological implications including\u0000the application to the QCD axion and gravitational wave generation. Our\u0000findings highlight that multi-axion dynamics can lead to qualitatively\u0000different outcomes for topological defects, challenging the conventional\u0000picture of cosmic evolution of topological defects based on single-axion\u0000models.","PeriodicalId":501067,"journal":{"name":"arXiv - PHYS - High Energy Physics - Phenomenology","volume":"7 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142258875","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Gravitational Wave Birefringence in Symmetron Cosmology 对称宇宙学中的引力波双折射

arXiv - PHYS - High Energy Physics - Phenomenology Pub Date : 2024-09-14 DOI: arxiv-2409.09382

Ze-Xuan Xiong, Da Huang

{"title":"Gravitational Wave Birefringence in Symmetron Cosmology","authors":"Ze-Xuan Xiong, Da Huang","doi":"arxiv-2409.09382","DOIUrl":"https://doi.org/arxiv-2409.09382","url":null,"abstract":"The symmetron is a light scalar which provides a screening mechanism so as to\u0000evade the strong constraints from local gravity tests. In order to achieve this\u0000goal, a $Z_2$ symmetry is imposed on the symmetron model. In this paper, we\u0000introduce a new symmetron Chern-Simons-like gravitational interaction which is\u0000$Z_2$ invariant but breaks the parity symmetry explicitly. As a result, it is\u0000found that this coupling can generate gravitational wave (GW) amplitude\u0000birefringence when GWs propagate over the symmetron backgrounds. Due to the\u0000matter density difference, the symmetron profile changes significantly when\u0000entering the galaxy, so that we need to discuss the extra-galactic and galactic\u0000situations separately. On the one hand, the cosmological symmetron field\u0000follows the adiabatic solution, which induces a parity-violating GW amplitude\u0000correction with its exponent proportional to the GW frequency and the traveling\u0000distance. On the other hand, the symmetron takes the screening solution within\u0000the Milky Way, and the generated GW birefringence is only a function of the GW\u0000frequency. By further comparing these two contributions, we find that the\u0000extra-galactic symmetron field produces the dominant birefringence effects.\u0000Finally, with the latest GW data from LIGO-Virgo-Kagra, we place a reasonable\u0000constraint on the parity-violating coupling parameter in this symmetron model.","PeriodicalId":501067,"journal":{"name":"arXiv - PHYS - High Energy Physics - Phenomenology","volume":"79 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142258932","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Heavy top quark mass in the minimal universal seesaw model 最小通用跷跷板模型中的重顶夸克质量

arXiv - PHYS - High Energy Physics - Phenomenology Pub Date : 2024-09-14 DOI: arxiv-2409.09365

Albertus Hariwangsa Panuluh, Takuya Morozumi

引用次数: 0