arXiv - PHYS - High Energy Physics - Phenomenology最新文献_第4页

Neutrino Model in Left-Right Symmetric Linear Seesaw Augmented with $A_4$ Modular Group 用 $A_4$ 模块组增强的左右对称线性视锯中微子模型

arXiv - PHYS - High Energy Physics - Phenomenology Pub Date : 2024-09-16 DOI: arxiv-2409.10195

Raktima Kalita, Mahadev Patgiri

引用次数: 0

Primordial black hole from domain wall fluctuations 来自域壁波动的原始黑洞

arXiv - PHYS - High Energy Physics - Phenomenology Pub Date : 2024-09-16 DOI: arxiv-2409.09986

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

引用次数: 0

The higher $χ_{cJ}(nP)$, $h_c(nP)$ states and the role of the gluon-exchange potential 更高的 $χ_{cJ}(nP)$、$h_c(nP)$ 状态和胶子交换势的作用

arXiv - PHYS - High Energy Physics - Phenomenology Pub Date : 2024-09-16 DOI: arxiv-2409.10761

A. M. Badalian

{"title":"The higher $χ_{cJ}(nP)$, $h_c(nP)$ states and the role of the gluon-exchange potential","authors":"A. M. Badalian","doi":"arxiv-2409.10761","DOIUrl":"https://doi.org/arxiv-2409.10761","url":null,"abstract":"The masses, the fine-structure splitting, and two-photon decay widths of the\u0000higher $nP$-charmonium states are calculated in the relativistic string model,\u0000reduced to the spinless Salpeter equation, where the static potential has no\u0000fitting parameters and the $c-$quark mass has the physical value. The resulting\u0000masses of $h_c(3P)$, $chi_{c1}(3P)$, $chi_{c0}(4P)$, $chi_{c0}(5P)$,\u0000$chi_{c1}(5P)$ are obtained in a good agreement with the experimental masses\u0000of the LHCb resonances: $h_c(4300)$, $chi_{c1}(4274)$, $X(4500)$, $X(4700)$,\u0000$X(4685)$. To test sensitivity of results to a chosen gluon-exchange (GE)\u0000potential, three types of $V_{ge}(r)$ are considered. In first case the\u0000non-screened GE potential with large vector coupling at asymptotic,\u0000$alpha_{rm V}(rm asym.)=0.635$, and the $c$-quark mass $m_c=1.430$ GeV are\u0000taken; in second case a screened $V_{ge}$ and $m_c=1.385$ are investigated, and\u0000in third case the GE potential is totally suppressed, $V_{ge}=0$, and\u0000$m_c=1.32$ GeV. The agreement with experiment is reached only if the same\u0000(universal) flattened confining potential, introduced in the analysis of the\u0000radial Regge trajectories of light mesons, is used. The unobserved $6P,0^+$\u0000resonance with the mass $cong 4.81$ GeV, near $J/psiphi(1680)$ threshold, is\u0000predicted. Our analysis shows that the screening of the GE potential is\u0000possible but weakly affects the physical results obtained. The calculated\u0000two-photon decay widths weakly differ in the three cases but may become an\u0000important factor, which distinguishes $cbar c$ and four-quark states.","PeriodicalId":501067,"journal":{"name":"arXiv - PHYS - High Energy Physics - Phenomenology","volume":"8 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142258811","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

What we can learn from the angular differential rates (only) in semileptonic $B to D^* ell ν_ell$ decays 我们能从半轻子 $B to D^* ell ν_ell$ 衰变的角差率（仅）中学到什么

arXiv - PHYS - High Energy Physics - Phenomenology Pub Date : 2024-09-16 DOI: arxiv-2409.10492

G. Martinelli, S. Simula, L. Vittorio

引用次数: 0

Imprints of Dark Photons on Gravitational Wave Polarizations 暗光子对引力波偏振的影响

arXiv - PHYS - High Energy Physics - Phenomenology Pub Date : 2024-09-16 DOI: arxiv-2409.10471

Kimihiro Nomura, Jiro Soda, Kazushige Ueda, Ziwei Wang

引用次数: 0

Hunting Primordial Black Hole Dark Matter in Lyman-$α$ Forest 在莱曼-$α$森林中猎取原始黑洞暗物质

arXiv - PHYS - High Energy Physics - Phenomenology Pub Date : 2024-09-16 DOI: arxiv-2409.10617

Akash Kumar Saha, Abhijeet Singh, Priyank Parashari, Ranjan Laha

{"title":"Hunting Primordial Black Hole Dark Matter in Lyman-$α$ Forest","authors":"Akash Kumar Saha, Abhijeet Singh, Priyank Parashari, Ranjan Laha","doi":"arxiv-2409.10617","DOIUrl":"https://doi.org/arxiv-2409.10617","url":null,"abstract":"A very pressing question in contemporary physics is the identity of Dark\u0000Matter (DM), and one that has not been answered affirmatively to any degree so\u0000far. Primordial Black Holes (PBHs) are one of the most well-motivated DM\u0000candidates. Light enough PBHs have been constrained by either the non-detection\u0000of their Hawking radiation itself, or by the non-observation of any measurable\u0000effects of this radiation on astrophysical and cosmological observables. We\u0000constrain the PBH density by their Hawking radiation effect on the\u0000intergalactic medium (IGM) temperature evolution. We use the latest deductions\u0000of IGM temperature from Lyman-$alpha$ forest observations. We put constraints\u0000on the fraction of PBH DM with masses $5 times 10^{15}$ g - $10^{17}$ g\u0000separately for spinning and non-spinning BHs. We derive constraints by dealing\u0000with the heating effects of the astrophysical reionization of the IGM in two\u0000ways. In one way, we completely neglect this heating due to astrophysical\u0000sources, thus giving us weaker constraints, but completely robust to the\u0000reionization history of the universe. In the second way, we utilise some\u0000modelling of the ionization and temperature history, and use it to derive more\u0000stringent constraints. We find that for non-spinning PBHs of mass $10^{16}$ g,\u0000the current measurements can constrain the PBH-density to be $lesssim$ 0.1% of\u0000the total DM. We find that these constraints from the latest Lyman-$alpha$\u0000forest temperature measurements are competitive, and hence provide a new\u0000observable to probe the nature of PBH DM. The systematics affecting\u0000Lyman-$alpha$ forest measurements are different from other constraining\u0000observations, and thus this is a complementary probe.","PeriodicalId":501067,"journal":{"name":"arXiv - PHYS - High Energy Physics - Phenomenology","volume":"10 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142258806","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

Neutron Tagging Can Greatly Reduce Spallation Backgrounds in Super-Kamiokande 中子标记可大大降低超级卡莫康德的溅射背景

arXiv - PHYS - High Energy Physics - Phenomenology Pub Date : 2024-09-16 DOI: arxiv-2409.10611

Obada Nairat, John F. Beacom, Shirley Weishi Li

引用次数: 0

Antistatic-antistatic $bar Q bar Q qq$ potentials for $u$, $d$ and $s$ light quarks from lattice QCD 从格状 QCD 得出的 $u$、$d$ 和 $s$ 轻夸克的抗静电 $bar Q bar Q qq$ 电位

arXiv - PHYS - High Energy Physics - Phenomenology Pub Date : 2024-09-16 DOI: arxiv-2409.10786

Pedro Bicudo, Marina Krstic Marinkovic, Lasse Müller, Marc Wagner

引用次数: 0

A study of pure multi-strange hadrons production in Pb+Pb collisions at LHC energies using HYDJET++ model 利用 HYDJET++ 模型研究大型强子对撞机能量下 Pb+Pb 碰撞中的纯多距强子产生

arXiv - PHYS - High Energy Physics - Phenomenology Pub Date : 2024-09-16 DOI: arxiv-2409.10435

Gauri DeviBanaras Hindu University, Varanasi, India, B. K. SinghBanaras Hindu University, Varanasi, India, Discipline of Natural Sciences, PDPM Indian Institute of Information Technology Design & Manufacturing, Jabalpur, India

{"title":"A study of pure multi-strange hadrons production in Pb+Pb collisions at LHC energies using HYDJET++ model","authors":"Gauri DeviBanaras Hindu University, Varanasi, India, B. K. SinghBanaras Hindu University, Varanasi, India, Discipline of Natural Sciences, PDPM Indian Institute of Information Technology Design & Manufacturing, Jabalpur, India","doi":"arxiv-2409.10435","DOIUrl":"https://doi.org/arxiv-2409.10435","url":null,"abstract":"For the present work, we have used the HYDJET++ model to explore the\u0000production of pure multi-strange hadrons in Pb+Pb collisions at\u0000$sqrt{s_{NN}}$= 2.76 TeV and $sqrt{s_{NN}}$= 5.02 TeV collision energies,\u0000respectively. We have simulated the $p_{T}$-spectra and elliptic flow ($v_{2}$)\u0000of $phi$-meson and $Omega$-baryons comparing our results with ALICE\u0000experimental data and several phenomenological models (HIJING/$Boverline{B}$,\u0000VISHNU, EPOS, AMPT, and Krakow) across various centrality intervals.\u0000Additionally, we have calculated the nuclear modification factors ($R_{AA}$ and\u0000$R_{CP}$), which provide a perception of jet quenching phenomena. Hence, our\u0000findings enable the study of the energy and system dependence of $phi$ and\u0000$Omega$ hadrons production over a wide range of ultra-relativistic collision\u0000energies. We also present the particle ratios ($Omega/phi$,\u0000$overline{Omega}^{+}/Omega^{-}$, $Omega/pi$, and $phi/pi$), offering\u0000insights on the strangeness enhancement and chemical properties of the medium\u0000at both LHC collision energies.","PeriodicalId":501067,"journal":{"name":"arXiv - PHYS - High Energy Physics - Phenomenology","volume":"54 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142258874","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

Constraints on axions from patchy screening of the cosmic microwave background 宇宙微波背景的斑块屏蔽对轴子的制约

arXiv - PHYS - High Energy Physics - Phenomenology Pub Date : 2024-09-16 DOI: arxiv-2409.10514

Samuel Goldstein, Fiona McCarthy, Cristina Mondino, J. Colin Hill, Junwu Huang, Matthew C. Johnson

引用次数: 0