arXiv - PHYS - High Energy Physics - Phenomenology最新文献_第7页

Revisiting primordial neutrino asymmetries, spectral distortions and cosmological constraints with full neutrino transport 利用全中微子输运重新审视原始中微子的不对称性、频谱畸变和宇宙学约束条件

arXiv - PHYS - High Energy Physics - Phenomenology Pub Date : 2024-09-12 DOI: arxiv-2409.08280

Yuan-Zhen Li, Jiang-Hao Yu

{"title":"Revisiting primordial neutrino asymmetries, spectral distortions and cosmological constraints with full neutrino transport","authors":"Yuan-Zhen Li, Jiang-Hao Yu","doi":"arxiv-2409.08280","DOIUrl":"https://doi.org/arxiv-2409.08280","url":null,"abstract":"The primordial neutrino asymmetry leave profound imprints on the evolution\u0000history of the universe, which can be constrained by cosmological observations,\u0000including Big Bang Nucleosynthesis (BBN), Cosmic Microwave Background (CMB),\u0000and Large-Scale Structure (LSS). We present comprehensive analysis on\u0000implications and constraints of the primordial neutrino asymmetry $xi_nu$,\u0000based on a precise treatment of neutrino decoupling by solving the complete\u0000(anti)neutrino quantum kinetic equations in the Closed-Time-Path formalism. The\u0000effective number of neutrinos $ N_{rm eff}$ and (anti)neutrino spectral\u0000distortions are calculated, and we find that the non-instantaneous decoupling\u0000correction is given by $delta N_{rm eff} = 0.0440 + 0.0102 , xi_nu^2$.\u0000Then we perform the state-of-the-art calculation for the abundance of light\u0000elements including (anti)neutrino spectral distortions, which indicate a\u0000positive asymmetry $0.032 leq xi_nu leq 0.052$ from EMPRESS data. The\u0000implications of the neutrino asymmetry for the CMB and LSS are studied in\u0000detail, and we find that the Baryon Acoustic Oscillations (BAO) are also\u0000significantly affected by $xi_nu$ in addition to the sum of neutrino masses.\u0000A combined analysis with EMPRESS BBN, Planck CMB and BOSS BAO data yields a\u0000tighter constraint $xi_nu = 0.024 pm 0.013$, which provides constraints on\u0000UV models capable of producing large asymmetries.","PeriodicalId":501067,"journal":{"name":"arXiv - PHYS - High Energy Physics - Phenomenology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142223496","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

Systematic analysis of the D-wave charmonium states with the QCD sum rules 用 QCD 和则系统分析 D 波粲态

arXiv - PHYS - High Energy Physics - Phenomenology Pub Date : 2024-09-12 DOI: arxiv-2409.08051

Qi Xin, Zhi-Gang Wang

引用次数: 0

Multi-component dark matter and Galactic 511 keV $γ$-ray emission 多成分暗物质与银河系 511 keV γ 射线辐射

arXiv - PHYS - High Energy Physics - Phenomenology Pub Date : 2024-09-12 DOI: arxiv-2409.07851

Sarif Khan, Jinsu Kim, Jongkuk Kim, Pyungwon Ko

{"title":"Multi-component dark matter and Galactic 511 keV $γ$-ray emission","authors":"Sarif Khan, Jinsu Kim, Jongkuk Kim, Pyungwon Ko","doi":"arxiv-2409.07851","DOIUrl":"https://doi.org/arxiv-2409.07851","url":null,"abstract":"We study multi-component dark matter scenarios and the Galactic 511 keV\u0000$gamma$-ray emission line signal in the framework of a local, dark $U(1)_D$\u0000extension of the Standard Model. A light vector dark matter particle associated\u0000with the dark $U(1)_D$ may decay and annihilate to electron-positron pairs. The\u0000produced positrons may in turn form positroniums that subsequently annihilate\u0000to two photons, accounting for the observed line signal of the Galactic 511 keV\u0000$gamma$-ray emission. Three scenarios are investigated. First, we consider the\u0000minimal $U(1)_D$ extension where a dark gauge boson and a dark Higgs boson are\u0000newly introduced to the particle content. As a second scenario, we consider\u0000WIMP-type dark matter with the introduction of an extra dark fermion which, in\u0000addition to the dark gauge boson, may contribute to the dark matter relic\u0000abundance. It is thus a multi-component dark matter scenario with a UV-complete\u0000dark $U(1)_D$ symmetry. In particular, the vector dark matter may account for a\u0000small fraction of the total dark matter relic abundance. Finally, we consider\u0000the scenario where the dark matter particles are of the FIMP-type. In this\u0000case, both the light vector and fermion dark matter particles may be produced\u0000via the freeze-in and super-WIMP mechanisms. Considering theoretical and\u0000observational constraints, we explore the allowed parameter space where the\u0000Galactic 511 keV $gamma$-ray line signal and the dark matter relic can both be\u0000explained. We also discuss possible observational signatures.","PeriodicalId":501067,"journal":{"name":"arXiv - PHYS - High Energy Physics - Phenomenology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142178491","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

Charged Higgs Boson Phenomenology in the Dark Z mediated Fermionic Dark Matter Model 暗Z介导费米子暗物质模型中的带电希格斯玻色子现象学

arXiv - PHYS - High Energy Physics - Phenomenology Pub Date : 2024-09-12 DOI: arxiv-2409.07688

Kyu Jung Bae, Jinn-Ouk Gong, Dong-Won Jung, Kang Young Lee, Chaehyun Yu, Chan Beom Park

引用次数: 0

Insights from Binary Pulsars and Laboratories into Baryon Number Violation: Implications for GeV Dark Matter 双脉冲星和实验室对重子数违反的洞察：GeV 暗物质的含义

arXiv - PHYS - High Energy Physics - Phenomenology Pub Date : 2024-09-12 DOI: arxiv-2409.08178

Rouzbeh Allahverdi, Adrian Thompson, Mohammadreza Zakeri

引用次数: 0

Semi-Classical limit and quantum corrections in noncoincidence power-law $f(Q)$-Cosmology 非共振幂律$f(Q)$宇宙学中的半经典极限和量子修正

arXiv - PHYS - High Energy Physics - Phenomenology Pub Date : 2024-09-12 DOI: arxiv-2409.07755

Andronikos Paliathanasis

引用次数: 0

The Role of the Curvaton Post-Planck 后普朗克曲线的作用

arXiv - PHYS - High Energy Physics - Phenomenology Pub Date : 2024-09-12 DOI: arxiv-2409.08279

Gongjun Choi, Wenqi Ke, Keith A. Olive

{"title":"The Role of the Curvaton Post-Planck","authors":"Gongjun Choi, Wenqi Ke, Keith A. Olive","doi":"arxiv-2409.08279","DOIUrl":"https://doi.org/arxiv-2409.08279","url":null,"abstract":"The expected improvements in the precision of inflationary physics\u0000observables including the scalar spectral index $n_{s}$ and the\u0000tensor-to-scalar ratio $r$ will reveal more than just the viability of a\u0000particular model of inflation. In the presence of a curvaton field $chi$,\u0000supposedly dead models of inflation can be resurrected as these observables are\u0000affected by curvaton perturbations. For currently successful models, improved\u0000constraints will enable us to constrain the properties of extra decaying scalar\u0000degrees of freedom produced during inflation. In this work, we demonstrate\u0000these diverse uses of a curvaton field with the most recent constraints on\u0000($n_{s},r$) and two exemplary inflation models, the Starobinsky model, and a\u0000model of new inflation. Our analysis invokes three free parameters: the\u0000curvaton mass $m_{chi}$, its decay rate $Gamma_{chi}$ the reheating\u0000temperature $T_{rm RH}$ produced by inflaton decays. We systematically analyze\u0000possible post-inflationary era scenarios of a curvaton field. By projecting the\u0000most recent CMB data on ($n_{s},r$) into this parameter space, we can either\u0000set constraints on the curvaton parameters from successful models of inflation\u0000(so that the success is not spoiled) or determine the parameters which are able\u0000to save a model for which $n_{s}$ is predicted to be below the experimental\u0000data. We emphasize that the initial value of $langle chi^2 rangle propto\u0000H^4/m_chi^2$ produced during inflation is determined from a stochastic\u0000approach and thus not a free parameter in our analysis. We also investigate the\u0000production of local non-Gaussianity $f_{NL}^{(rm loc)}$ and apply current CMB\u0000constraints to the parameter space. Intriguingly, we find that a large value of\u0000$f_{NL}^{(rm loc)}$ of $mathcal{O}(1)$ can be produced for both of the two\u0000representative inflation models.","PeriodicalId":501067,"journal":{"name":"arXiv - PHYS - High Energy Physics - Phenomenology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142223497","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

Enhancing Direct Detection of Higgsino Dark Matter 加强希格斯暗物质的直接探测

arXiv - PHYS - High Energy Physics - Phenomenology Pub Date : 2024-09-12 DOI: arxiv-2409.07768

Peter W. Graham, Harikrishnan Ramani, Samuel S. Y. Wong

{"title":"Enhancing Direct Detection of Higgsino Dark Matter","authors":"Peter W. Graham, Harikrishnan Ramani, Samuel S. Y. Wong","doi":"arxiv-2409.07768","DOIUrl":"https://doi.org/arxiv-2409.07768","url":null,"abstract":"While much supersymmetric WIMP parameter space has been ruled out, one\u0000remaining important candidate is Higgsino dark matter. The Higgsino can\u0000naturally realize the ``inelastic dark matter\" scenario, where the scattering\u0000off a nucleus occurs between two nearly-degenerate states, making it invisible\u0000to WIMP direct detection experiments if the splitting is too large to be\u0000excited. It was realized that a ``luminous dark matter\" detection process,\u0000where the Higgsino upscatters in the Earth and subsequently decays into a\u0000photon in a large neutrino detector, offers the best sensitivity to such a\u0000scenario. We consider the possibility of adding a large volume of a heavy\u0000element, such as Pb or U, around the detector. We also consider the presence of\u0000U and Th in the Earth itself, and the effect of an enhanced high-velocity tail\u0000of the dark matter distribution due to the presence of the Large Magellanic\u0000Cloud. These effects can significantly improve the sensitivity of detectors\u0000such as JUNO, SNO+, and Borexino, potentially making it possible in the future\u0000to cover much of the remaining parameter space for this classic SUSY WIMP dark\u0000matter.","PeriodicalId":501067,"journal":{"name":"arXiv - PHYS - High Energy Physics - Phenomenology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142178493","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

Masses of higher excited states of $Ξ_{c}'$ and $Ω_{c}$ baryons Ξ_{c}'$和Ω_{c}$重子高激发态的质量

arXiv - PHYS - High Energy Physics - Phenomenology Pub Date : 2024-09-12 DOI: arxiv-2409.07789

Pooja Jakhad, Juhi Oudichhya, Ajay Kumar Rai

引用次数: 0

Can millicharge be probed at future Super Tau Charm Facility via mono-$π^0$ searches? 在未来的超级头魅力设施中，能否通过单$π^0$搜索探测到毫卡？

arXiv - PHYS - High Energy Physics - Phenomenology Pub Date : 2024-09-12 DOI: arxiv-2409.08129

Yu Zhang

引用次数: 0