Physics Letters B最新文献

Retuning radio astronomy for axion dark matter with neutron stars

IF 4.3 2区物理与天体物理

Physics Letters B Pub Date : 2025-02-17 DOI: 10.1016/j.physletb.2025.139328

Javier De Miguel

引用次数: 0

Finding interaction mechanism between exotic molecule and conventional hadron

IF 4.3 2区物理与天体物理

Physics Letters B Pub Date : 2025-02-17 DOI: 10.1016/j.physletb.2025.139329

Ri-Qing Qian , Fu-Lai Wang , Xiang Liu

引用次数: 0

Probing the curvature of the cosmos from quantum entanglement due to gravity

IF 4.3 2区物理与天体物理

Physics Letters B Pub Date : 2025-02-15 DOI: 10.1016/j.physletb.2025.139309

Suddhasattwa Brahma , Abhinove N. Seenivasan

引用次数: 0

Emergence of magnetic dipole band in 88Sr due to novel stretched coupling scheme

IF 4.3 2区物理与天体物理

Physics Letters B Pub Date : 2025-02-14 DOI: 10.1016/j.physletb.2025.139324

B. Das , Md.S.R. Laskar , R. Palit , S. Rajbanshi , V. Malik , F.S. Babra , S. Chattopadhyay , Biswajit Das , P. Dey , A. Kundu

{"title":"Emergence of magnetic dipole band in 88Sr due to novel stretched coupling scheme","authors":"B. Das , Md.S.R. Laskar , R. Palit , S. Rajbanshi , V. Malik , F.S. Babra , S. Chattopadhyay , Biswajit Das , P. Dey , A. Kundu","doi":"10.1016/j.physletb.2025.139324","DOIUrl":"10.1016/j.physletb.2025.139324","url":null,"abstract":"<div><div>High spin states of <sup>88</sup>Sr have been populated using <sup>13</sup>C + <sup>82</sup>Se reaction. The structure of a negative parity band consisting of six magnetic dipole transitions with energies of 605 - 490 - 311 - 267 - 528 - 974 keV extending up to <span><math><msup><mrow><mi>I</mi></mrow><mrow><mi>π</mi></mrow></msup></math></span> = <span><math><msup><mrow><mn>13</mn></mrow><mrow><mo>−</mo></mrow></msup></math></span> was investigated through lifetimes measurements using Doppler Shift Attenuation Method (<span>dsam</span>). The extracted transition strengths from the measured lifetimes initially increase with spin and then decrease beyond <span><math><msup><mrow><mi>I</mi></mrow><mrow><mi>π</mi></mrow></msup></math></span> = <span><math><msup><mrow><mn>10</mn></mrow><mrow><mo>−</mo></mrow></msup></math></span>. The observed gamma-ray energy behaviour and that of transition rates were explained using a novel stretched coupling scheme. In this geometrical model, an interplay between a particle-particle attractive shears and two particle-hole repulsive shears has been invoked to explain the observed behaviour. This confirms the existence of an attractive shears between two particle blades for the first time in any nuclei.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"862 ","pages":"Article 139324"},"PeriodicalIF":4.3,"publicationDate":"2025-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143429505","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

Parton distributions of gluons in different representations

IF 4.3 2区物理与天体物理

Physics Letters B Pub Date : 2025-02-14 DOI: 10.1016/j.physletb.2025.139326

J.P. Ma , G.P. Zhang

引用次数: 0

Likelihood of a zero in the proton elastic electric form factor

IF 4.3 2区物理与天体物理

Physics Letters B Pub Date : 2025-02-14 DOI: 10.1016/j.physletb.2025.139323

Peng Cheng (程鹏) , Zhao-Qian Yao (姚照千) , Daniele Binosi , Craig D. Roberts

{"title":"Likelihood of a zero in the proton elastic electric form factor","authors":"Peng Cheng (程鹏) , Zhao-Qian Yao (姚照千) , Daniele Binosi , Craig D. Roberts","doi":"10.1016/j.physletb.2025.139323","DOIUrl":"10.1016/j.physletb.2025.139323","url":null,"abstract":"<div><div>Working with the 29 available data on the ratio of proton electric and magnetic form factors, <span><math><msub><mrow><mi>μ</mi></mrow><mrow><mi>p</mi></mrow></msub><msubsup><mrow><mi>G</mi></mrow><mrow><mi>E</mi></mrow><mrow><mi>p</mi></mrow></msubsup><mo>(</mo><msup><mrow><mi>Q</mi></mrow><mrow><mn>2</mn></mrow></msup><mo>)</mo><mo>/</mo><msubsup><mrow><mi>G</mi></mrow><mrow><mi>M</mi></mrow><mrow><mi>p</mi></mrow></msubsup><mo>(</mo><msup><mrow><mi>Q</mi></mrow><mrow><mn>2</mn></mrow></msup><mo>)</mo></math></span>, and independent of any model or theory of strong interactions, we use the Schlessinger point method to objectively address the question of whether the ratio possesses a zero and, if so, its location. Our analysis predicts that, with 50% confidence, the data are consistent with the existence of a zero in the ratio on <span><math><msup><mrow><mi>Q</mi></mrow><mrow><mn>2</mn></mrow></msup><mo>≤</mo><mn>10.37</mn></math></span> GeV<sup>2</sup>. The level of confidence increases to 99.9% on <span><math><msup><mrow><mi>Q</mi></mrow><mrow><mn>2</mn></mrow></msup><mo>≤</mo><mn>13.06</mn></math></span> GeV<sup>2</sup>. Significantly, the likelihood that existing data are consistent with the absence of a zero in the ratio on <span><math><msup><mrow><mi>Q</mi></mrow><mrow><mn>2</mn></mrow></msup><mo>≤</mo><mn>14.49</mn></math></span> GeV<sup>2</sup> is 1/1-million.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"862 ","pages":"Article 139323"},"PeriodicalIF":4.3,"publicationDate":"2025-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143429506","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

A minimalistic model for inelastic dark matter

IF 4.3 2区物理与天体物理

Physics Letters B Pub Date : 2025-02-13 DOI: 10.1016/j.physletb.2025.139320

Giovani Dalla Valle Garcia

{"title":"A minimalistic model for inelastic dark matter","authors":"Giovani Dalla Valle Garcia","doi":"10.1016/j.physletb.2025.139320","DOIUrl":"10.1016/j.physletb.2025.139320","url":null,"abstract":"<div><div>Models of inelastic (or pseudo-Dirac) dark matter commonly introduce a gauge symmetry spontaneously broken by the introduction of a dark sector version of the Higgs mechanism. We find that this ubiquitous introduction of two extra fields, a vector and a complex scalar boson, is indeed unnecessary, with only a mass generating real scalar field being actually required. We consider a simple UV-complete model realizing this minimal setup and study the decays of the excited dark matter state as well as constraints from perturbative unitarity, (in)direct detection and colliders. We find that, in the visible freeze-out scenario (<span><math><mtext>DM</mtext><mspace></mspace><mtext>DM</mtext><mo>↔</mo><mtext>SM</mtext><mspace></mspace><mtext>SM</mtext></math></span>), we still have unconstrained regions of parameter space for dark matter masses ≳100 GeV. Moreover, most of the available regions either present long-lived excited states, which are expected to interfere with the standard cosmological history, or will be probed by future direct detection experiments, such as DARWIN, due to the unavoidable residual elastic interactions. The only regions remaining out of experimental reach present highly fine-tuned parameters.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"862 ","pages":"Article 139320"},"PeriodicalIF":4.3,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143429510","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

On extraction of ground state deformation parameters from quasielastic and fusion excitation functions

IF 4.3 2区物理与天体物理

Physics Letters B Pub Date : 2025-02-13 DOI: 10.1016/j.physletb.2025.139319

Chandra Kumar, S. Nath

{"title":"On extraction of ground state deformation parameters from quasielastic and fusion excitation functions","authors":"Chandra Kumar, S. Nath","doi":"10.1016/j.physletb.2025.139319","DOIUrl":"10.1016/j.physletb.2025.139319","url":null,"abstract":"<div><div>Measurement of back-angle quasielastic scattering around the barrier, in conjunction with coupled-channels calculation, has been reported in recent years to be an effective and sensitive method to determine ground state deformation parameters of nuclei in the <em>sd</em>-shell as well as rare earth regions. Consequently, quasielastic scattering has been proposed to be a promising probe for extraction of ground state deformation parameters of short-lived radioactive nuclei. Theoretical investigations of quasielastic scattering and fusion for the system <sup>28</sup>Si+<sup>144</sup>Sm, within the coupled-channels framework, are reported here. Fusion barrier height distribution is derived from measured fusion excitation function by an analytic method assuming the former to be a multi-Gaussian function. Bayesian analyses are carried out, both for fusion and quasielastic scattering data, to optimally determine quadrupole and hexadecapole deformation parameters of <sup>28</sup>Si. The results suggest that extracted values are not free from ambiguities, thus necessitating utmost caution while extracting ground state deformation parameters following this method.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"862 ","pages":"Article 139319"},"PeriodicalIF":4.3,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143418540","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

Production of actinide isotopes near θlab = 0∘ in multinucleon transfer reaction 238U + 248Cm

IF 4.3 2区物理与天体物理

Physics Letters B Pub Date : 2025-02-13 DOI: 10.1016/j.physletb.2025.139318

Yu Yang , Long Zhu , Zehong Liao , Zepeng Gao , Yueping Fang , Jun Su , Zhong Liu , Dongsheng Hou , Hao Huang , Cheng Li , Fengshou Zhang

{"title":"Production of actinide isotopes near θlab = 0∘ in multinucleon transfer reaction 238U + 248Cm","authors":"Yu Yang , Long Zhu , Zehong Liao , Zepeng Gao , Yueping Fang , Jun Su , Zhong Liu , Dongsheng Hou , Hao Huang , Cheng Li , Fengshou Zhang","doi":"10.1016/j.physletb.2025.139318","DOIUrl":"10.1016/j.physletb.2025.139318","url":null,"abstract":"<div><div>The multinucleon transfer reaction <sup>238</sup>U + <sup>248</sup>Cm is studied at incident energies <span><math><msub><mrow><mi>E</mi></mrow><mrow><mi>c</mi><mo>.</mo><mi>m</mi><mo>.</mo></mrow></msub></math></span> = 898 and 800 MeV using the Isospin-dependent Quantum Molecular Dynamics model. In this work, we investigate the angular distribution of products and their correlations with incident energy, charge distribution fluctuations, and kinetic energy. At 898 MeV, the angular distribution of heavy actinide products peaks near the grazing angle, whereas at 800 MeV, it shifts near <span><math><msup><mrow><mn>0</mn></mrow><mrow><mo>∘</mo></mrow></msup></math></span>. Moreover, at 800 MeV, the proportion of isotopes emitted at forward angles increases with atomic number. These results suggest that current gas-filled recoil separators and velocity filters, which are highly effective for small-angle fusion-evaporation products, could be adapted for low-energy multinucleon transfer reactions. Given the challenges in the separation and identification of transfer products, the results of this study provide valuable guidance for future experimental investigations.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"862 ","pages":"Article 139318"},"PeriodicalIF":4.3,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143418541","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

Understanding of the BESIII measurement of (anti)hyperon-nucleon scattering

IF 4.3 2区物理与天体物理

Physics Letters B Pub Date : 2025-02-13 DOI: 10.1016/j.physletb.2025.139321

Xiao-Yun Wang , Yuan Gao , Xiang Liu

引用次数: 0