The European Physical Journal A最新文献

{"title":"Three-body form factors in the coupled-channels analysis of the ({}^{6}textrm{Li}+{}^{9}textrm{Be}) inelastic scattering at (E_{textrm{lab}}=32) MeV","authors":"B. A. Urazbekov,&nbsp;A. Azhibekov,&nbsp;B. K. Mauey,&nbsp;B. S. Baimurzinova","doi":"10.1140/epja/s10050-026-01935-z","DOIUrl":"10.1140/epja/s10050-026-01935-z","url":null,"abstract":"<div><p>The elastic and inelastic scattering of the weakly bound <span>({}^{6}textrm{Li}+{}^{9}textrm{Be})</span> system at the laboratory energy of 32 MeV were studied within the optical model and coupled-channels approaches by taking into account the cluster structure of the interacting nuclei. The semi-microscopic double-folding optical potential was constructed using realistic nuclear matter densities obtained within the three-body cluster models <span>({}^{6}textrm{Li}=alpha +p+n)</span> and <span>({}^{9}textrm{Be}=alpha +alpha +n)</span>. The calculated folding potential was first validated through the analysis of the elastic scattering angular distributions and showed good agreement with the available experimental data. The inelastic scattering corresponding to the excitation of the <span>({}^{9}textrm{Be})</span> nucleus to the 2.43 MeV state was analyzed within the coupled-channels framework, with particular focus on the role of transition form factors. Three different transition form factors were considered and compared: the microscopic form factor calculated within the three-body <span>(alpha +alpha +n)</span> model of <span>({}^{9}textrm{Be})</span>, the form factor obtained as the first derivative of the calculated double-folding potential, and the phenomenological form factor taken as the first derivative of the Woods–Saxon potential. The microscopic three-body and double-folding form factors are demonstrated to be applicable to the description of inelastic scattering, yielding results comparable to those obtained with the phenomenological approach.</p></div>","PeriodicalId":786,"journal":{"name":"The European Physical Journal A","volume":"62 8","pages":""},"PeriodicalIF":3.0,"publicationDate":"2026-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148750696","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Microscopic calculations of the total astrophysical S factors for the 3H(d, n)4He and 3He(d, p)4He fusion reactions","authors":"Alexander S. Solovyev","doi":"10.1140/epja/s10050-026-01916-2","DOIUrl":"10.1140/epja/s10050-026-01916-2","url":null,"abstract":"<div><p>The energy dependences of the total astrophysical <i>S</i> factors for the ³H(<i>d</i>,<i> n</i>)⁴He and ³He(<i>d</i>,<i> p</i>)⁴He fusion reactions are calculated within the microscopic multichannel cluster approach in the oscillator representation. These reactions are of great importance for the big bang nucleosynthesis and controlled thermonuclear fusion. The obtained results are compared to available experimental data. A good agreement is achieved. The low-energy behaviours of the calculated total <i>S</i> factors including their peaks are shown to be governed by the transfer processes via the tensor force in the 3/2⁺ states of the considered five-nucleon systems.</p></div>","PeriodicalId":786,"journal":{"name":"The European Physical Journal A","volume":"62 8","pages":""},"PeriodicalIF":3.0,"publicationDate":"2026-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148750633","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Proton pickup and stripping in the (^{48}{textrm{Ca}} + {}^{197}{textrm{Au}}) reaction at 400 MeV","authors":"S. M. Lukyanov,&nbsp;A. K. Azhibekov,&nbsp;V. A. Maslov,&nbsp;A. Yeginbay,&nbsp;H. M. Devaraja,&nbsp;D. Aznabayev,&nbsp;D. Berikov,&nbsp;B. A. Duisebayev,&nbsp;T. Issatayev,&nbsp;K. Mendibayev,&nbsp;K. D. Molotorenko,&nbsp;Yu. E. Penionzhkevich,&nbsp;B. M. Sadykov,&nbsp;A. V. Shakhov,&nbsp;S. S. Stukalov,&nbsp;A. Temirzhanov,&nbsp;T. K. Zholdybayev,&nbsp;E. V. Mardyban,&nbsp;A. Rahmatinejad,&nbsp;T. M. Shneidman","doi":"10.1140/epja/s10050-026-01933-1","DOIUrl":"10.1140/epja/s10050-026-01933-1","url":null,"abstract":"<div><p>Proton pickup and stripping reactions induced by <span>(^{48}{textrm{Ca}})</span> projectiles on a <span>(^{197}{textrm{Au}})</span> target have been investigated at a bombarding energy of 400 MeV. Projectile-like fragments were identified through measurements of their nuclear charge, angular distributions, and kinetic energy spectra. Cross sections were determined for reaction products with <span>(Z = 12{-}28.)</span> The measured energy and angular distributions reveal the coexistence of predominantly quasi-elastic-like (QE-like) and deep-inelastic-collision-like (DIC-like) components. Comparison with GRAZING and dinuclear system (DNS) calculations shows that the QE-like component is reasonably reproduced within the semiclassical GRAZING approach, while the broader charge distributions associated with the DIC-like dissipative component are described within the dinuclear system model.</p></div>","PeriodicalId":786,"journal":{"name":"The European Physical Journal A","volume":"62 8","pages":""},"PeriodicalIF":3.0,"publicationDate":"2026-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148750697","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Electro- and photoproduction of muon pairs with (mu )CLAS12: double deeply virtual compton scattering, timelike compton scattering, and (J/psi ) production","authors":"J. S. Alvarado,&nbsp;N. Baltzell,&nbsp;M. Bondi,&nbsp;P. Chatagnon,&nbsp;R. De Vita,&nbsp;M. Hoballah,&nbsp;V. Kubarovsky,&nbsp;R. Paremuzyan,&nbsp;S. Stepanyan,&nbsp;P. Achenbach,&nbsp;M. Arratia,&nbsp;M. Battaglieri,&nbsp;V. Bertone,&nbsp;A. Bianconi,&nbsp;M. E. Boglione,&nbsp;F. Bossù,&nbsp;G. Bracco,&nbsp;F. Bzeih,&nbsp;S. Bueltmann,&nbsp;V. Burkert,&nbsp;D. S. Carman,&nbsp;T. Cao,&nbsp;M. Carpinelli,&nbsp;E. Cisbani,&nbsp;G. Ciullo,&nbsp;E. Cline,&nbsp;M. Contalbrigo,&nbsp;A. D’Angelo,&nbsp;N. Dashyan,&nbsp;S. Diehl,&nbsp;M. Defurne,&nbsp;L. El Fassi,&nbsp;L. Elouadrhiri,&nbsp;M. Farooq,&nbsp;E. Ferrand,&nbsp;A. Filippi,&nbsp;M. Filippini,&nbsp;C. Fogler,&nbsp;G. Foti,&nbsp;S. Frantzen,&nbsp;A. Fulci,&nbsp;K. Gates,&nbsp;D. I. Glazier,&nbsp;K. Gnanvo,&nbsp;S. Grazzi,&nbsp;M. Hattawy,&nbsp;F. Hauenstein,&nbsp;H. S. Jo,&nbsp;M. Kerr,&nbsp;A. Kripko,&nbsp;L. Lanza,&nbsp;P. Lenisa,&nbsp;X. Li,&nbsp;N. Liyanage,&nbsp;R. M. Marinaro III,&nbsp;V. Martínez-Fernández,&nbsp;D. Martiryan,&nbsp;V. Mascagna,&nbsp;M. D. McCaughan,&nbsp;B. McKinnon,&nbsp;C. Mezrag,&nbsp;R. Milner,&nbsp;M. Mirazita,&nbsp;P. Musico,&nbsp;T. Nagorna,&nbsp;P. Nadel-Turonski,&nbsp;H. Nguyen,&nbsp;S. Niccolai,&nbsp;M. Osipenko,&nbsp;L. Pappalardo,&nbsp;C. Paudel,&nbsp;N. Pilleux,&nbsp;A. Pilloni,&nbsp;B. Pire,&nbsp;S. Plavully,&nbsp;L. Polizzi,&nbsp;R. Perrino,&nbsp;B. Raydo,&nbsp;M. Ripani,&nbsp;M. Ronayette,&nbsp;S. Schadmand,&nbsp;A. Schmidt,&nbsp;Y. G. Sharabian,&nbsp;E. Sidoretti,&nbsp;M. Spreafico,&nbsp;I. I. Strakovsky,&nbsp;P. Sznajder,&nbsp;R. Tyson,&nbsp;M. Taiuti,&nbsp;M. Ungaro,&nbsp;G. Urciuoli,&nbsp;S. Vallarino,&nbsp;L. Venturelli,&nbsp;T. Vittorini,&nbsp;E. Voutier,&nbsp;A. Vossen,&nbsp;J. Wagner,&nbsp;Y. Wang,&nbsp;X. Wei,&nbsp;N. Wuerfel,&nbsp;Z. Zhao","doi":"10.1140/epja/s10050-026-01909-1","DOIUrl":"10.1140/epja/s10050-026-01909-1","url":null,"abstract":"<div><p>The CEBAF Large Acceptance Spectrometer for operation at 12 GeV (CLAS12) at the Thomas Jefferson National Accelerator Facility has played a central role in advancing the understanding of nucleon and nuclear structure. As increasingly precise data become available, new physics opportunities emerge that extend beyond the current capabilities of CLAS12. In this article, a program to explore the quark and gluon structure of the nucleon through di-muon electro- and photoproduction is presented. Its primary focus is the measurement of beam-spin asymmetries in Double Deeply Virtual Compton Scattering, <span>(ep rightarrow e^prime mu ^+ mu ^-p^prime )</span>. By independently varying the incoming and outgoing photon virtualities and momentum transfer, the DDVCS measurement provides access to the Generalized Parton Distributions over their full three-dimensional phase space, extending beyond the kinematic constraints of Deeply Virtual Compton Scattering and Timelike Compton Scattering. In addition, the large acceptance and high luminosity of the <span>(mu )</span>CLAS12 experiment will enable precision measurements of near-threshold <span>(J/psi )</span> production and high-statistics studies of Timelike Compton Scattering.</p></div>","PeriodicalId":786,"journal":{"name":"The European Physical Journal A","volume":"62 8","pages":""},"PeriodicalIF":3.0,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148628562","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Average number of prompt neutrons in the spontaneous fission of (^{260})Rf","authors":"A. V. Isaev,&nbsp;R. S. Mukhin,&nbsp;A. V. Andreev,&nbsp;A. Rahmatinejad,&nbsp;T. M. Shneidman,&nbsp;H. M. Devaraja,&nbsp;M. A. Bychkov,&nbsp;M. L. Chelnokov,&nbsp;V. I. Chepigin,&nbsp;V. D. Danilkin,&nbsp;I. N. Izosimov,&nbsp;D. E. Katrasev,&nbsp;A. A. Kuznetsova,&nbsp;O. N. Malyshev,&nbsp;A. G. Popeko,&nbsp;Yu. A. Popov,&nbsp;B. Sailaubekov,&nbsp;E. A. Sokol,&nbsp;E. Teymurov,&nbsp;M. S. Tezekbayeva,&nbsp;I. I. Ulanova,&nbsp;A. I. Svirikhin","doi":"10.1140/epja/s10050-026-01926-0","DOIUrl":"10.1140/epja/s10050-026-01926-0","url":null,"abstract":"<div><p>An experimental study of <span>(^{260})</span>Rf produced in the complete fusion reaction <span>(^{238})</span>U + <span>(^{26})</span>Mg was performed using the SHELS velocity filter. The prompt neutron multiplicity in the spontaneous fission of <span>(^{260})</span>Rf was measured for the first time, yielding an average value <span>(bar{nu }(^{260}text {Rf}) = 4.88 pm 0.24)</span>. The half-life was measured as <span>(T_{1/2}(^{260}text {Rf}) = 16.8^{+5.5}_{-3.8})</span> ms (95% confidence limit).</p></div>","PeriodicalId":786,"journal":{"name":"The European Physical Journal A","volume":"62 7","pages":""},"PeriodicalIF":3.0,"publicationDate":"2026-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148614745","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Neutron-rich nuclei and neutron skins from chiral low-resolution interactions","authors":"P. Arthuis,&nbsp;K. Hebeler,&nbsp;A. Schwenk","doi":"10.1140/epja/s10050-026-01905-5","DOIUrl":"10.1140/epja/s10050-026-01905-5","url":null,"abstract":"<div><p>Neutron-rich nuclei provide important insights to nuclear forces and to the nuclear equation of state. Advances in <i>ab initio</i> methods combined with new opportunities with rare isotope beams enable unique explorations of their properties based on nuclear forces applicable over the entire nuclear chart. In this paper, we develop novel chiral low-resolution interactions that accurately describe bulk properties from <span>(^{16})</span>O to <span>(^{208})</span>Pb. With these, we investigate density distributions and neutron skins of neutron-rich nuclei. Our results show that neutron skins are narrowly predicted over all nuclei with interesting sensitivities for the most extreme, experimentally unexplored cases.</p></div>","PeriodicalId":786,"journal":{"name":"The European Physical Journal A","volume":"62 7","pages":""},"PeriodicalIF":3.0,"publicationDate":"2026-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epja/s10050-026-01905-5.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148628720","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

{"title":"Pressure-dependent detector effects in beam-based neutron lifetime measurements","authors":"Ashish M. Desai","doi":"10.1140/epja/s10050-026-01929-x","DOIUrl":"10.1140/epja/s10050-026-01929-x","url":null,"abstract":"<div><p>The discrepancy between neutron lifetime measurements obtained using the beam and bottle methods remains an unresolved problem in experimental neutron physics. The recent J-PARC experiment addresses this issue using a beam-based approach by detecting beta decay electrons instead of protons, thereby introducing a different set of systematic uncertainties. Although the reported value is closer to that obtained from bottle measurements than from traditional beam experiments, the data exhibit relatively large <span>(chi ^2)</span> values and a noticeable dependence of the measured neutron lifetime on gas pressure. In this work, we investigate the role of pressure-dependent detector response and background contributions in neutron lifetime measurements. We show that even small pressure-dependent variations can lead to significant shifts in the extracted neutron lifetime. These effects can lead to the large <span>(chi ^2)</span> values obtained when assuming a constant lifetime. Independent estimates of the pressure coefficient, based on statistical considerations and detector physics, yield values of the same order of magnitude. These results demonstrate that pressure-dependent detector effects provide a plausible explanation for the observed variations in gas-based beam neutron lifetime measurements, such as those performed at J-PARC.</p></div>","PeriodicalId":786,"journal":{"name":"The European Physical Journal A","volume":"62 7","pages":""},"PeriodicalIF":3.0,"publicationDate":"2026-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148614849","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Energy and centrality dependence of thermodynamical observables from multiplicity in (mathrm Pb!+!Pb) and (mathrm Au!+!Au) collisions","authors":"Francisco Reyes Rodríguez,&nbsp;Eleazar Cuautle","doi":"10.1140/epja/s10050-026-01922-4","DOIUrl":"10.1140/epja/s10050-026-01922-4","url":null,"abstract":"<div><p>Using a statistical model, we analyze published multiplicity distributions for identified hadrons produced in heavy ion collisions in the energy range from 2.7 to 200 <span>(textrm{GeV})</span>. Our analysis enables the prediction of the multiplicity distributions for multi-strangeness hadrons that have not yet been measured in lower-energy experiments. Furthermore, we obtain freeze-out parameters, including temperature, baryon chemical and strangeness potentials, the strangeness suppression factor, and the system radius, as functions of centrality and collision energy. Additionally, we computed and discussed the Skewness and its behavior at lower collision energies, highlighting the importance of the freeze-out parameters in determining the liquid–gas phase transition in nuclear matter.</p></div>","PeriodicalId":786,"journal":{"name":"The European Physical Journal A","volume":"62 7","pages":""},"PeriodicalIF":3.0,"publicationDate":"2026-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epja/s10050-026-01922-4.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148615057","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

{"title":"Polarized target nuclear magnetic resonance measurements with deep neural networks","authors":"D. Seay,&nbsp;I. P. Fernando,&nbsp;D. Keller","doi":"10.1140/epja/s10050-026-01937-x","DOIUrl":"10.1140/epja/s10050-026-01937-x","url":null,"abstract":"<div><p>Continuous-wave Nuclear Magnetic Resonance (CW-NMR) operated in constant-current mode has served as a foundational technique for polarization measurement in solid-state dynamically polarized targets within nuclear and high-energy physics experiments for several decades, and it remains an essential tool. Conventional Q-meter-based phase-sensitive detection is critical for precise real-time determination of target polarization during scattering runs. However, the accuracy and reliability of these measurements are frequently compromised by elevated noise levels, baseline drift, and systematic uncertainties arising from signal isolation and fitting, ultimately degrading the overall experimental figure of merit. In this work, we report the first successful application of neural network architectures to continuous-wave NMR polarization metrology. By leveraging advanced machine learning techniques for signal extraction and denoising, we achieve a substantial reduction of fitting uncertainties under a variety of realistic simulated and experimental conditions. These improvements translate directly into more robust real-time (online) polarization monitoring and higher precision in subsequent offline analysis. By reducing analysis-induced uncertainty, the resulting methodology can improve the effective figure of merit for scattering experiments employing dynamically polarized targets and provides a new toolset for NMR-based polarimetry in high-energy and nuclear physics.</p></div>","PeriodicalId":786,"journal":{"name":"The European Physical Journal A","volume":"62 7","pages":""},"PeriodicalIF":3.0,"publicationDate":"2026-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epja/s10050-026-01937-x.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148615056","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

{"title":"The NUMEN project: NUclear Matrix Elements for Neutrinoless double beta decay (2nd edition)","authors":"F. Cappuzzello,&nbsp;C. Agodi,&nbsp;D. Calvo,&nbsp;D. Carbone,&nbsp;M. Cavallaro,&nbsp;M. Colonna,&nbsp;M. Giovannini,&nbsp;R. Linares,&nbsp;J. R. B. Oliveira,&nbsp;L. Pandola,&nbsp;D. Pierroutsakou,&nbsp;A. D. Russo,&nbsp;E. Santopinto,&nbsp;V. Soukeras,&nbsp;A. Spatafora,&nbsp;D. Torresi,&nbsp;S. Tudisco,&nbsp;L. Acosta,&nbsp;N. Added,&nbsp;V. A. P. de Aguiar,&nbsp;P. Amador-Valenzuela,&nbsp;A. Anastasio,&nbsp;N. Auerbach,&nbsp;L. H. Avanzi,&nbsp;Y. Ayyad,&nbsp;R. Babu,&nbsp;J. I. Bellone,&nbsp;R. Bijker,&nbsp;A. Boiano,&nbsp;I. Boztosun,&nbsp;S. Brasolin,&nbsp;G. A. Brischetto,&nbsp;C. Cabo Landeira,&nbsp;N. Cairone,&nbsp;S. Calabrese,&nbsp;L. Campajola,&nbsp;E. N. Cardozo,&nbsp;K. Challa,&nbsp;E. R. Chávez-Lomelí,&nbsp;E. F. Chinaglia,&nbsp;I. Ciraldo,&nbsp;A. Comite,&nbsp;M. Cortesi,&nbsp;K. M. Costa,&nbsp;H. Dapo,&nbsp;C. De Benedictis,&nbsp;G. De Gregorio,&nbsp;F. Delaunay,&nbsp;L. M. Donaldson,&nbsp;F. Dumitrache,&nbsp;C. Ferraresi,&nbsp;J. L. Ferreira,&nbsp;M. Fisichella,&nbsp;D. Gambacurta,&nbsp;E. M. Gandolfo,&nbsp;H. Garcia-Tecocoatzi,&nbsp;A. Gargano,&nbsp;C. Garofalo,&nbsp;R. Gleason,&nbsp;M. A. Guazzelli,&nbsp;A. Hacisalihoglu,&nbsp;A. Huerta Hernandez,&nbsp;V. Izzo,&nbsp;T. C. Khumalo,&nbsp;S. Koulouris,&nbsp;Y. Kucuk,&nbsp;L. La Fauci,&nbsp;J. A. Lay,&nbsp;H. Lenske,&nbsp;C. Lombardo,&nbsp;J. M. López González,&nbsp;J. Lubian,&nbsp;D. J. Marín-Lámbarri,&nbsp;J. Mas-Ruiz,&nbsp;S. A. Masunaga,&nbsp;N. H. Medina,&nbsp;M. Moralles,&nbsp;L. Neri,&nbsp;R. Neveling,&nbsp;M. Pagliero,&nbsp;A. Pakou,&nbsp;K. Palli,&nbsp;A. Pandalone,&nbsp;R. Panero,&nbsp;L. Pappalardo,&nbsp;M. Paterna,&nbsp;L. Pellegri,&nbsp;R. Persiani,&nbsp;H. Petrascu,&nbsp;N. Pietralla,&nbsp;F. Pinna,&nbsp;A. Pitronaci,&nbsp;S. Sandoval,&nbsp;T. M. Santarelli,&nbsp;R. B. B. Santos,&nbsp;D. Sartirana,&nbsp;J. V. Schervenin,&nbsp;O. Sgouros,&nbsp;S. O. Solakci,&nbsp;G. Souliotis,&nbsp;T. L. Thang,&nbsp;B. Urazbekov,&nbsp;C. Valencia,&nbsp;I. Valinotto,&nbsp;A. Vanzanella,&nbsp;R. I. M. Vsevolodovna,&nbsp;A. Yildirim,&nbsp;V. A. B. Zagatto","doi":"10.1140/epja/s10050-026-01911-7","DOIUrl":"10.1140/epja/s10050-026-01911-7","url":null,"abstract":"<div><p>This article presents the main achievements of the NUMEN project, together with an updated and detailed overview of the associated R&amp;D activities and theoretical advances. It essentially represents the second edition of the review article <i>[Eur. Phys. J. A 54 (2018) 72]</i>, with a particular focus on the most significant results obtained in recent years.NUMEN is primarily devoted to the investigation of nuclear double charge exchange (DCE) reactions induced in heavy-ion collisions at beam energies above the Coulomb barrier. These reactions are of great interest for exploring the largely unexplored rank-2 isotensor effects in bound nuclear systems under controlled laboratory conditions.Within this context, NUMEN introduces a promising approach to access the nuclear matrix elements (NMEs) that govern the lifetime of neutrinoless double beta decay (0<span>(nu beta beta )</span>).The article reports detailed aspects of the theoretical framework developed by the NUMEN collaboration to extract the relevant nuclear structure information from measured DCE cross sections. The first experimental measurements carried out at the INFN-LNS laboratory have provided encouraging evidence of the method’s potential to yield quantitative information relevant to 0<span>(nu beta beta )</span>-decay NMEs. Nevertheless, the extremely small values of the DCE cross sections, combined with the stringent resolution requirements, have necessitated a major upgrade of the INFN-LNS infrastructure to achieve luminosities far exceeding those previously attainable. The ongoing upgrade program, carried out within the NUMEN project to meet these demanding requirements, is also discussed in the article.</p></div>","PeriodicalId":786,"journal":{"name":"The European Physical Journal A","volume":"62 7","pages":""},"PeriodicalIF":3.0,"publicationDate":"2026-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148614397","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}