Physics Letters B最新文献

Heavy four-quark mesons bcb‾c‾: Scalar particle 重四夸克介子 bcb‾c‾：标量粒子

IF 4.3 2区物理与天体物理

Physics Letters B Pub Date : 2024-09-27 DOI: 10.1016/j.physletb.2024.139042

引用次数: 0

Topological diagram analysis of Bc3‾→B10M decays in the SU(3)F limit and beyond SU(3)F极限及之后[式略]衰变的拓扑图分析

IF 4.3 2区物理与天体物理

Physics Letters B Pub Date : 2024-09-26 DOI: 10.1016/j.physletb.2024.139039

引用次数: 0

Cold darkogenesis: Dark matter and baryon asymmetry in light of the PTA signal 冷暗物质生成：从PTA信号看暗物质和重子不对称性

IF 4.3 2区物理与天体物理

Physics Letters B Pub Date : 2024-09-26 DOI: 10.1016/j.physletb.2024.139045

{"title":"Cold darkogenesis: Dark matter and baryon asymmetry in light of the PTA signal","authors":"","doi":"10.1016/j.physletb.2024.139045","DOIUrl":"10.1016/j.physletb.2024.139045","url":null,"abstract":"<div><div>We build upon the intriguing possibility that the recently reported nano-Hz gravitational wave signal by Pulsar Timing Array (PTA) experiments is sourced by a strong first-order phase transition from a nearly conformal dark sector. The phase transition has to be strongly supercooled to explain the signal amplitude, while the critical temperature has to be in the <span><math><mi>O</mi></math></span>(GeV) range, as dictated by the peak frequency of the gravitational wave spectrum. However, the resulting strong supercooling exponentially dilutes away any pre-existing baryon asymmetry and dark matter, calling for a new paradigm of their productions. We then develop a mechanism of cold darkogenesis that generates a dark asymmetry during the phase transition from the textured dark <span><math><mi>S</mi><mi>U</mi><msub><mrow><mo>(</mo><mn>2</mn><mo>)</mo></mrow><mrow><mi>D</mi></mrow></msub></math></span> Higgs field. This dark asymmetry is transferred to the visible sector via neutron portal interactions, resulting in the observed baryon asymmetry. Furthermore, the mechanism naturally leads to the correct abundance of asymmetric dark matter, with self-interaction of the scale that is of the right order to solve the diversity problem in galactic rotation curves. Collider searches for mono-jets and dark matter direct detection experiments can dictate the viability of the model.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":null,"pages":null},"PeriodicalIF":4.3,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142326617","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

General expressions for on-shell recursion relations for tree-level open string amplitudes 树级开弦振幅的壳上递推关系的一般表达式

IF 4.3 2区物理与天体物理

Physics Letters B Pub Date : 2024-09-24 DOI: 10.1016/j.physletb.2024.139038

引用次数: 0

A coherent microscopic picture for the exotic structure of 11Be 11Be奇异结构的连贯微观图景

IF 4.3 2区物理与天体物理

Physics Letters B Pub Date : 2024-09-23 DOI: 10.1016/j.physletb.2024.139036

{"title":"A coherent microscopic picture for the exotic structure of 11Be","authors":"","doi":"10.1016/j.physletb.2024.139036","DOIUrl":"10.1016/j.physletb.2024.139036","url":null,"abstract":"<div><div>The neutron-rich nucleus <sup>11</sup>Be is one of the most enigmatic exotic nuclei in the periodic table. It exhibits a multitude of unique and intriguing phenomena within a single nucleus, including the halo phenomenon, clustering structure, and parity inversion. A unified description of these exotic properties represents a significant challenge for the nuclear physics field. By employing the axially deformed relativistic Hartree-Fock-Bogoliubov (D-RHFB) model, we have successfully reproduced the parity inversion and the one-neutron halo in <sup>11</sup>Be, and revealed the underlying cluster structure. It is found that the intrusion of the <em>sd</em>-shell, which results in the parity inversion, is coherently connected with the halo and cluster structures. In particular, the <em>s</em>-wave is responsible for the halo formation, and the mixing of <span><math><mn>2</mn><msub><mrow><mi>s</mi></mrow><mrow><mn>1</mn><mo>/</mo><mn>2</mn></mrow></msub></math></span>- and <span><math><mn>1</mn><msub><mrow><mi>d</mi></mrow><mrow><mn>5</mn><mo>/</mo><mn>2</mn></mrow></msub></math></span>-waves enhances the cluster structure. This work elucidates the coherence between the parity inversion and the halo/cluster structures of <sup>11</sup>Be, and addresses the long-standing challenge of providing a unified explanation for the multiple exotic phenomena observed in <sup>11</sup>Be.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":null,"pages":null},"PeriodicalIF":4.3,"publicationDate":"2024-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142319957","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Precise mass measurements of A = 133 isobars with the Canadian Penning Trap: Resolving the Qβ− anomaly at 133Te 利用加拿大潘宁陷阱对 A = 133 等值线进行精确质量测量：解决 133Te 的 Qβ- 异常现象

IF 4.3 2区物理与天体物理

Physics Letters B Pub Date : 2024-09-23 DOI: 10.1016/j.physletb.2024.139037

引用次数: 0

Strong cosmic censorship in de Sitter spacetimes with dark matter 有暗物质的德西特时空中的强宇宙审查

IF 4.3 2区物理与天体物理

Physics Letters B Pub Date : 2024-09-20 DOI: 10.1016/j.physletb.2024.139035

{"title":"Strong cosmic censorship in de Sitter spacetimes with dark matter","authors":"","doi":"10.1016/j.physletb.2024.139035","DOIUrl":"10.1016/j.physletb.2024.139035","url":null,"abstract":"<div><div>After imposing the weak energy condition on dark matter, we find that even in the absence of charge, a spherically symmetric de Sitter black hole with perfect fluid dark matter may still possess a Cauchy horizon. This paper investigates the stability of the Cauchy horizon in such a black hole under perturbations from a massless scalar field. Through numerical calculations of the massless scalar field's quasinormal modes, we discover that in this spacetime, when the black hole approaches extremality, i.e., when the dark-matter parameter <em>b</em> approaches its maximum value <span><math><msub><mrow><mi>b</mi></mrow><mrow><mtext>max</mtext></mrow></msub></math></span>, the Strong Cosmic Censorship (SCC) conjecture may be violated. This is the first instance of classical SCC violation observed in a spherically symmetric, uncharged black hole. Additionally, we explore the region of SCC violation within the parameter space <span><math><mi>Λ</mi><msup><mrow><mi>M</mi></mrow><mrow><mn>2</mn></mrow></msup><mo>−</mo><mi>b</mi><mo>/</mo><msub><mrow><mi>b</mi></mrow><mrow><mtext>max</mtext></mrow></msub></math></span>. Our findings indicate that as the cosmological constant increases, the violation region initially expands and then contracts.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":null,"pages":null},"PeriodicalIF":4.3,"publicationDate":"2024-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0370269324005938/pdfft?md5=b3eaf78f97227f31e303e42123618dca&pid=1-s2.0-S0370269324005938-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142310546","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Energy dependence of heavy-ion initial condition in isobar collisions 等边碰撞中重离子初始条件的能量依赖性

IF 4.3 2区物理与天体物理

Physics Letters B Pub Date : 2024-09-20 DOI: 10.1016/j.physletb.2024.139034

{"title":"Energy dependence of heavy-ion initial condition in isobar collisions","authors":"","doi":"10.1016/j.physletb.2024.139034","DOIUrl":"10.1016/j.physletb.2024.139034","url":null,"abstract":"<div><div>Collisions of isobar nuclei, those with the same mass number but different structure parameters, provide a new way to probe the initial condition of the heavy ion collisions. Using transport model simulation of <sup>96</sup>Ru+<sup>96</sup>Ru and <sup>96</sup>Zr+<sup>96</sup>Zr collisions at two energies <span><math><msqrt><mrow><msub><mrow><mi>s</mi></mrow><mrow><mi>NN</mi></mrow></msub></mrow></msqrt><mo>=</mo><mn>0.2</mn></math></span> TeV and 5.02 TeV, where <sup>96</sup>Ru and <sup>96</sup>Zr nuclei have significantly different deformations and radial profiles, we identify sources of eccentricities contributing independently to the final state harmonic flow <span><math><msub><mrow><mi>v</mi></mrow><mrow><mi>n</mi></mrow></msub></math></span>. The efficacy for flow generation differs among these sources, and explains the modest energy dependence of the isobar ratios of <span><math><msub><mrow><mi>v</mi></mrow><mrow><mi>n</mi></mrow></msub></math></span>. Additionally, a significant component of <span><math><msub><mrow><mi>v</mi></mrow><mrow><mi>n</mi></mrow></msub></math></span> is found to be uncorrelated with the eccentricity, but is instead generated dynamically during system evoluation. Experimental measurement of these ratios at the LHC energy and comparison with RHIC energy can provide insight into the collision-energy dependence of the initial condition.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":null,"pages":null},"PeriodicalIF":4.3,"publicationDate":"2024-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0370269324005926/pdfft?md5=f054a4548619ec44dbd2b94a2bd6a613&pid=1-s2.0-S0370269324005926-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142316061","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Neutrino mass model and dark matter with Y = 0 inert triplet scalar 中微子质量模型和含有 Y = 0 惰性三重标量的暗物质

IF 4.3 2区物理与天体物理

Physics Letters B Pub Date : 2024-09-19 DOI: 10.1016/j.physletb.2024.139030

{"title":"Neutrino mass model and dark matter with Y = 0 inert triplet scalar","authors":"","doi":"10.1016/j.physletb.2024.139030","DOIUrl":"10.1016/j.physletb.2024.139030","url":null,"abstract":"<div><div>We study a one-loop induced neutrino mass model with an inert isospin triplet scalar field of <span><math><mi>Y</mi><mo>=</mo><mn>0</mn></math></span> and heavier isospin doublet vector-like leptons and singlet Majorana right-handed fermions. In addition to the neutrino mass matrix, we explain sizable scale of muon anomalous magnetic dipole moment <span><math><msup><mrow><mn>10</mn></mrow><mrow><mo>−</mo><mn>9</mn></mrow></msup></math></span> by introducing a singly-charged boson <span><math><msup><mrow><mi>S</mi></mrow><mrow><mo>±</mo></mrow></msup></math></span>. We show numerical analysis of neutrino oscillation, lepton flavor violations, Z boson decays, and demonstrate our allowed regions in cases of normal and inverted hierarchies. We find the sizable scale of muon anomalous magnetic dipole moment for both cases. Then, we move on to the discussion of dark matter candidates to satisfy the relic density where we have two candidates; fermionic dark matter and bosonic one. And, we classify four cases fermionic dark matter with normal and inverted hierarchies, bosonic one with normal and inverted hierarchies and search for each of the allowed points in the model.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":null,"pages":null},"PeriodicalIF":4.3,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0370269324005884/pdfft?md5=76ab28a8b7b4bcd1ef6315309f36a112&pid=1-s2.0-S0370269324005884-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142310545","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Measurement of J/ψ and ψ(2S) production in p + p and p + d interactions at 120 GeV 在120 GeV的p+p和p+d相互作用中测量J/ψ和ψ(2S)的产生

IF 4.3 2区物理与天体物理

Physics Letters B Pub Date : 2024-09-18 DOI: 10.1016/j.physletb.2024.139032

引用次数: 0