Physics Letters B最新文献_第9页

Negative radiation pressure in the abelian Higgs model 非等边希格斯模型中的负辐射压力

IF 4.3 2区物理与天体物理

Physics Letters B Pub Date : 2024-08-13 DOI: 10.1016/j.physletb.2024.138954

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T-odd transverse momentum dependent gluon fragmentation functions in a spectator model 旁观者模型中与 T-odd 横向动量相关的胶子碎裂函数

IF 4.3 2区物理与天体物理

Physics Letters B Pub Date : 2024-08-13 DOI: 10.1016/j.physletb.2024.138961

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Determining the CP property of htt¯ coupling via a novel jet substructure observable 通过新型射流子结构观测指标确定htt¯耦合的CP特性

IF 4.3 2区物理与天体物理

Physics Letters B Pub Date : 2024-08-13 DOI: 10.1016/j.physletb.2024.138959

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Generic predictions for primordial perturbations and their implications 原始扰动的一般预测及其影响

IF 4.3 2区物理与天体物理

Physics Letters B Pub Date : 2024-08-13 DOI: 10.1016/j.physletb.2024.138956

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Long-range near-side correlation in e+e− collisions at 183-209 GeV with ALEPH archived data 利用 ALEPH 存档数据研究 183-209 GeV 的 e+e- 碰撞中的长程近侧相关性

IF 4.3 2区物理与天体物理

Physics Letters B Pub Date : 2024-08-12 DOI: 10.1016/j.physletb.2024.138957

{"title":"Long-range near-side correlation in e+e− collisions at 183-209 GeV with ALEPH archived data","authors":"","doi":"10.1016/j.physletb.2024.138957","DOIUrl":"10.1016/j.physletb.2024.138957","url":null,"abstract":"<div>The first measurement of two-particle angular correlations for charged particles with LEP-II data is presented. The study is performed using archived hadronic <math><msup><mrow><mi>e</mi></mrow><mrow><mo>+</mo></mrow></msup><msup><mrow><mi>e</mi></mrow><mrow><mo>−</mo></mrow></msup></math> data collected by ALEPH at center-of-mass energies up to 209 GeV, above the <math><msup><mrow><mi>W</mi></mrow><mrow><mo>+</mo></mrow></msup><msup><mrow><mi>W</mi></mrow><mrow><mo>−</mo></mrow></msup></math> production threshold, which provide access to unprecedented charged-particle multiplicities and more complex color-string configurations if compared to previous measurements at LEP-I energies. An intriguing long-range near-side excess is observed in the correlation function measured with respect to the thrust axis in the highest multiplicity interval (<math><msub><mrow><mi>N</mi></mrow><mrow><mi>trk</mi></mrow></msub><mo>≥</mo><mn>50</mn></math>). Such a structure is not predicted by the Monte-Carlo simulation. The harmonic anisotropy coefficients <math><msub><mrow><mi>v</mi></mrow><mrow><mi>n</mi></mrow></msub></math>, which result from the Fourier expansion of the two-particle correlation functions, were also measured for the first time in <math><msup><mrow><mi>e</mi></mrow><mrow><mo>+</mo></mrow></msup><msup><mrow><mi>e</mi></mrow><mrow><mo>−</mo></mrow></msup></math> data, and compared to pythia 6 predictions and to the results obtained in proton-proton collisions. The results presented in the Letter provide novel experimental constraints on the formation of collective phenomena in point-like <math><msup><mrow><mi>e</mi></mrow><mrow><mo>+</mo></mrow></msup><msup><mrow><mi>e</mi></mrow><mrow><mo>−</mo></mrow></msup></math> collisions.</div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":null,"pages":null},"PeriodicalIF":4.3,"publicationDate":"2024-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S037026932400515X/pdfft?md5=806d1ffc05034ea9702e629cadddbbc8&pid=1-s2.0-S037026932400515X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141985062","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

Coupled channels analysis of 8He+4He scattering and resonant behaviour 8He+4He 散射和共振行为的耦合通道分析

IF 4.3 2区物理与天体物理

Physics Letters B Pub Date : 2024-08-12 DOI: 10.1016/j.physletb.2024.138955

引用次数: 0

Exploring the truth and beauty of theory landscapes with machine learning 用机器学习探索理论景观的真与美

IF 4.3 2区物理与天体物理

Physics Letters B Pub Date : 2024-08-12 DOI: 10.1016/j.physletb.2024.138941

引用次数: 0

Measurement of (anti)alpha production in central Pb–Pb collisions at sNN=5.02 TeV 在 sNN=5.02 TeV 的 Pb-Pb 中心对撞中测量（反）α产生

IF 4.3 2区物理与天体物理

Physics Letters B Pub Date : 2024-08-10 DOI: 10.1016/j.physletb.2024.138943

{"title":"Measurement of (anti)alpha production in central Pb–Pb collisions at sNN=5.02 TeV","authors":"","doi":"10.1016/j.physletb.2024.138943","DOIUrl":"10.1016/j.physletb.2024.138943","url":null,"abstract":"<div>In this letter, measurements of (anti)alpha production in central (0–10%) Pb–Pb collisions at a center-of-mass energy per nucleon–nucleon pair of <math><msqrt><mrow><msub><mrow><mi>s</mi></mrow><mrow><mi>NN</mi></mrow></msub></mrow></msqrt></math> = 5.02 TeV are presented, including the first measurement of an antialpha transverse-momentum spectrum. Owing to its large mass, the production of (anti)alpha is expected to be sensitive to different particle production models. The production yields and transverse-momentum spectra of nuclei are of particular interest because they provide a stringent test of these models. The averaged antialpha and alpha spectrum is compared to the spectra of lighter particles, by including it into a common blast-wave fit capturing the hydrodynamic-like flow of all particles. This fit is indicating that the (anti)alpha also participates in the collective expansion of the medium created in the collision. A blast-wave fit including only protons, (anti)alpha, and other light nuclei results in a similar flow velocity as the fit that includes all particles. A similar flow velocity, but a significantly larger kinetic freeze-out temperature is obtained when only protons and light nuclei are included in the fit. The coalescence parameter <math><msub><mrow><mi>B</mi></mrow><mrow><mn>4</mn></mrow></msub></math> is well described by calculations from a statistical hadronization model but significantly underestimated by calculations assuming nucleus formation via coalescence of nucleons. Similarly, the (anti)alpha-to-proton ratio is well described by the statistical hadronization model. On the other hand, coalescence calculations including approaches with different implementations of the (anti)alpha substructure tend to underestimate the data.</div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":null,"pages":null},"PeriodicalIF":4.3,"publicationDate":"2024-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S037026932400501X/pdfft?md5=56c21ce6f06c6934561d3b68f3d8b3ab&pid=1-s2.0-S037026932400501X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142240572","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

Cotton gravity is not predictive 棉花重力无法预测

IF 4.3 2区物理与天体物理

Physics Letters B Pub Date : 2024-08-09 DOI: 10.1016/j.physletb.2024.138947

引用次数: 0

Corrigendum to “Stellar weak-interaction rates for rp-process waiting-point nuclei from projected shell model” [Phys. Lett. B 848 (2024) 138338] 对 "从投射壳模型看rp过程等待点核的恒星弱相互作用率 "的更正 [Phys. Lett. B 848 (2024) 138338]

IF 4.3 2区物理与天体物理

Physics Letters B Pub Date : 2024-08-09 DOI: 10.1016/j.physletb.2024.138931

引用次数: 0