Pub Date : 2025-02-17DOI: 10.1016/j.physletb.2025.139328
Javier De Miguel
A model is constructed to predict the emission originating from axion-to-photon conversion in the strongly magnetized ultrarelativistic plasma of neutron stars. The acceleration and multiplicity of the charges are observed to shift the axion-induced spectral feature with respect to previous expectations. The frequency range of interest widens accordingly, and heavier dark matter axions may resonate in magnetospheric splits giving rise to detectable radio signals that could extend into the millimeter band. Ultimately, this work follows an affirmative answer to the question of whether neutron stars can give rise to any detectable high-frequency spectral feature that would allow us to probe axion dark matter of masses up to about a millielectronvolt. SGR 1745–2900 emerges as a particularly promising astrophysical laboratory for probing high-frequency axion dark matter.
{"title":"Retuning radio astronomy for axion dark matter with neutron stars","authors":"Javier De Miguel","doi":"10.1016/j.physletb.2025.139328","DOIUrl":"10.1016/j.physletb.2025.139328","url":null,"abstract":"<div><div>A model is constructed to predict the emission originating from axion-to-photon conversion in the strongly magnetized ultrarelativistic plasma of neutron stars. The acceleration and multiplicity of the charges are observed to shift the axion-induced spectral feature with respect to previous expectations. The frequency range of interest widens accordingly, and heavier dark matter axions may resonate in magnetospheric splits giving rise to detectable radio signals that could extend into the millimeter band. Ultimately, this work follows an affirmative answer to the question of whether neutron stars can give rise to any detectable high-frequency spectral feature that would allow us to probe axion dark matter of masses up to about a millielectronvolt. SGR 1745–2900 emerges as a particularly promising astrophysical laboratory for probing high-frequency axion dark matter.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"862 ","pages":"Article 139328"},"PeriodicalIF":4.3,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143429509","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}
Pub Date : 2025-02-17DOI: 10.1016/j.physletb.2025.139329
Ri-Qing Qian , Fu-Lai Wang , Xiang Liu
An intriguing and important question arises: how do hadronic molecules interact with conventional hadrons? In this work, we propose a novel mechanism to address this issue, focusing on the interactions between hidden-charm molecular pentaquarks () and nucleons (N). By applying this mechanism, we derive the corresponding interaction potentials, enabling the prediction of the bound state properties. Our results indicate the possible existence of bound states—an entirely new form of matter, ripe for exploration in the era of high-precision hadron spectroscopy. Notably, this mechanism extends beyond the systems and can be applied to any hadronic molecules interacting with conventional hadrons, offering the potential for discovering a variety of novel bound states.
{"title":"Finding interaction mechanism between exotic molecule and conventional hadron","authors":"Ri-Qing Qian , Fu-Lai Wang , Xiang Liu","doi":"10.1016/j.physletb.2025.139329","DOIUrl":"10.1016/j.physletb.2025.139329","url":null,"abstract":"<div><div>An intriguing and important question arises: how do hadronic molecules interact with conventional hadrons? In this work, we propose a novel mechanism to address this issue, focusing on the interactions between hidden-charm molecular pentaquarks (<span><math><msub><mrow><mi>P</mi></mrow><mrow><mi>c</mi></mrow></msub></math></span>) and nucleons (<em>N</em>). By applying this mechanism, we derive the corresponding interaction potentials, enabling the prediction of the bound state properties. Our results indicate the possible existence of <span><math><msub><mrow><mi>P</mi></mrow><mrow><mi>c</mi></mrow></msub><mi>N</mi></math></span> bound states—an entirely new form of matter, ripe for exploration in the era of high-precision hadron spectroscopy. Notably, this mechanism extends beyond the <span><math><msub><mrow><mi>P</mi></mrow><mrow><mi>c</mi></mrow></msub><mi>N</mi></math></span> systems and can be applied to any hadronic molecules interacting with conventional hadrons, offering the potential for discovering a variety of novel bound states.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"862 ","pages":"Article 139329"},"PeriodicalIF":4.3,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143437141","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}
Pub Date : 2025-02-15DOI: 10.1016/j.physletb.2025.139309
Suddhasattwa Brahma , Abhinove N. Seenivasan
If gravity is fundamentally quantum, any two quantum particles must get entangled with each other due to their mutual interaction through gravity. This phenomenon, dubbed gravity-mediated entanglement, has led to recent efforts of detecting perturbative quantum gravity in table-top experimental setups. In this paper, we generalize this to imagine two idealized massive oscillators, in their ground state, which get entangled due to gravity in an expanding universe, and find that the curvature of the background spacetime leaves its imprints on the resulting entanglement profile. Thus, detecting gravity-mediated entanglement from cosmological observations will open up an exciting new avenue of measuring the local expansion rate of the cosmos.
{"title":"Probing the curvature of the cosmos from quantum entanglement due to gravity","authors":"Suddhasattwa Brahma , Abhinove N. Seenivasan","doi":"10.1016/j.physletb.2025.139309","DOIUrl":"10.1016/j.physletb.2025.139309","url":null,"abstract":"<div><div>If gravity is fundamentally quantum, any two quantum particles must get entangled with each other due to their mutual interaction through gravity. This phenomenon, dubbed gravity-mediated entanglement, has led to recent efforts of detecting perturbative quantum gravity in table-top experimental setups. In this paper, we generalize this to imagine two idealized massive oscillators, in their ground state, which get entangled due to gravity in an expanding universe, and find that the curvature of the background spacetime leaves its imprints on the resulting entanglement profile. Thus, detecting gravity-mediated entanglement from cosmological observations will open up an exciting new avenue of measuring the local expansion rate of the cosmos.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"862 ","pages":"Article 139309"},"PeriodicalIF":4.3,"publicationDate":"2025-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143437143","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}
Pub Date : 2025-02-14DOI: 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
High spin states of 88Sr have been populated using 13C + 82Se 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 = was investigated through lifetimes measurements using Doppler Shift Attenuation Method (dsam). The extracted transition strengths from the measured lifetimes initially increase with spin and then decrease beyond = . 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.
{"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}
Pub Date : 2025-02-14DOI: 10.1016/j.physletb.2025.139326
J.P. Ma , G.P. Zhang
It has been questioned if gluon distributions defined in different representations of are the same. The question has arisen in the connection to the recently proposed resolution of the so-called axial gauge puzzle. We give a proof that gluon distributions defined in the fundamental- and adjoint representations, where gauge links consist of those which are all future-pointing or all past-pointing, are the same. These gauge links are needed to make the distributions gauge invariant. When these links consist of not only future-pointing gauge links but also past-pointing ones, the puzzle appears. We examine the puzzle for distributions at one-loop in the cases with gauge links along time-like-, space-like- and light-cone direction.
{"title":"Parton distributions of gluons in different representations","authors":"J.P. Ma , G.P. Zhang","doi":"10.1016/j.physletb.2025.139326","DOIUrl":"10.1016/j.physletb.2025.139326","url":null,"abstract":"<div><div>It has been questioned if gluon distributions defined in different representations of <span><math><mi>S</mi><mi>U</mi><mo>(</mo><mi>N</mi><mo>)</mo></math></span> are the same. The question has arisen in the connection to the recently proposed resolution of the so-called axial gauge puzzle. We give a proof that gluon distributions defined in the fundamental- and adjoint representations, where gauge links consist of those which are all future-pointing or all past-pointing, are the same. These gauge links are needed to make the distributions gauge invariant. When these links consist of not only future-pointing gauge links but also past-pointing ones, the puzzle appears. We examine the puzzle for distributions at one-loop in the cases with gauge links along time-like-, space-like- and light-cone direction.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"862 ","pages":"Article 139326"},"PeriodicalIF":4.3,"publicationDate":"2025-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143437142","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}
Pub Date : 2025-02-14DOI: 10.1016/j.physletb.2025.139323
Peng Cheng (程鹏) , Zhao-Qian Yao (姚照千) , Daniele Binosi , Craig D. Roberts
Working with the 29 available data on the ratio of proton electric and magnetic form factors, , 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 GeV2. The level of confidence increases to 99.9% on GeV2. Significantly, the likelihood that existing data are consistent with the absence of a zero in the ratio on GeV2 is 1/1-million.
{"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}
Pub Date : 2025-02-13DOI: 10.1016/j.physletb.2025.139320
Giovani Dalla Valle Garcia
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 (), 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.
{"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}
Pub Date : 2025-02-13DOI: 10.1016/j.physletb.2025.139319
Chandra Kumar, S. Nath
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 sd-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 28Si+144Sm, 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 28Si. The results suggest that extracted values are not free from ambiguities, thus necessitating utmost caution while extracting ground state deformation parameters following this method.
{"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}
Pub Date : 2025-02-13DOI: 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
The multinucleon transfer reaction 238U + 248Cm is studied at incident energies = 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 . 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.
{"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}
Pub Date : 2025-02-13DOI: 10.1016/j.physletb.2025.139321
Xiao-Yun Wang , Yuan Gao , Xiang Liu
Focusing on the recent measurements of the scattering processes and reported by BESIII, we offer a dynamical interpretation of the differences in the measured total and differential cross sections for both processes. This discrepancy arises because the u-channel contribution is forbidden for but allowed for . Additionally, we examine the enhancement effect in the forward angle region of the differential cross section for elastic scattering, attributed to the t-channel contribution. This work serves as a test to the scattering mechanism involved in these reactions.
{"title":"Understanding of the BESIII measurement of (anti)hyperon-nucleon scattering","authors":"Xiao-Yun Wang , Yuan Gao , Xiang Liu","doi":"10.1016/j.physletb.2025.139321","DOIUrl":"10.1016/j.physletb.2025.139321","url":null,"abstract":"<div><div>Focusing on the recent measurements of the scattering processes <span><math><mover><mrow><mi>Λ</mi></mrow><mrow><mo>¯</mo></mrow></mover><mi>p</mi><mo>→</mo><mover><mrow><mi>Λ</mi></mrow><mrow><mo>¯</mo></mrow></mover><mi>p</mi></math></span> and <span><math><mi>Λ</mi><mi>p</mi><mo>→</mo><mi>Λ</mi><mi>p</mi></math></span> reported by BESIII, we offer a dynamical interpretation of the differences in the measured total and differential cross sections for both processes. This discrepancy arises because the <em>u</em>-channel contribution is forbidden for <span><math><mover><mrow><mi>Λ</mi></mrow><mrow><mo>¯</mo></mrow></mover><mi>p</mi><mo>→</mo><mover><mrow><mi>Λ</mi></mrow><mrow><mo>¯</mo></mrow></mover><mi>p</mi></math></span> but allowed for <span><math><mi>Λ</mi><mi>p</mi><mo>→</mo><mi>Λ</mi><mi>p</mi></math></span>. Additionally, we examine the enhancement effect in the forward angle region of the differential cross section for <span><math><mover><mrow><mi>Λ</mi></mrow><mrow><mo>¯</mo></mrow></mover><mi>p</mi></math></span> elastic scattering, attributed to the <em>t</em>-channel contribution. This work serves as a test to the scattering mechanism involved in these reactions.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"862 ","pages":"Article 139321"},"PeriodicalIF":4.3,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143429508","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}
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