Pub Date : 2026-10-01DOI: 10.1016/j.ppnp.2026.104274
Huey-Wen Lin,Wei Wang,Yong Zhao
{"title":"Recent advances in transverse-momentum-dependent distributions in lattice QCD","authors":"Huey-Wen Lin,Wei Wang,Yong Zhao","doi":"10.1016/j.ppnp.2026.104274","DOIUrl":"https://doi.org/10.1016/j.ppnp.2026.104274","url":null,"abstract":"","PeriodicalId":412,"journal":{"name":"Progress in Particle and Nuclear Physics","volume":"11 1","pages":"104274"},"PeriodicalIF":9.6,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149208811","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}
Pub Date : 2026-09-01Epub Date: 2026-08-25DOI: 10.1016/j.ppnp.2026.104264
Bo-Wen Xiao, Yuxiang Zhao, Jian Zhou
The Electron–Ion Collider in China (EicC), a cutting-edge facility under development, aims to unveil the internal structure of nucleons and nuclei by leveraging collisions of high-intensity polarized electrons and ions (polarized protons, polarized deuterons, polarized 3He, and unpolarized heavy ions up to Uranium) at center-of-mass energies of 15–20 GeV and luminosity of (2–4) cm−2s−1. Its primary physics objectives include 3D tomography of nucleon spin and momentum structure, fundamental questions regarding the origin of nucleon mass, partonic structure of nuclei and parton interactions with the nuclear environment, and exploration of exotic hadronic states. In this paper, we review the physics potential of the EicC and highlight its unique capabilities for advancing precision nucleon structure studies by combining its specialized kinematic coverage and high luminosity. Since traditional topics like 3D nucleon structure have already been well-covered by several extensive reviews, we have deliberately dedicated significant space to recent progress in nucleon mass decomposition, nucleon energy-energy correlation, quantum information, and artificial intelligence applications in high-energy nuclear physics, which have been emerging rapidly and attracted a tremendous amount of attention in the community.
{"title":"Physics of the Electron–Ion Collider in China","authors":"Bo-Wen Xiao, Yuxiang Zhao, Jian Zhou","doi":"10.1016/j.ppnp.2026.104264","DOIUrl":"10.1016/j.ppnp.2026.104264","url":null,"abstract":"<div><div>The Electron–Ion Collider in China (EicC), a cutting-edge facility under development, aims to unveil the internal structure of nucleons and nuclei by leveraging collisions of high-intensity polarized electrons and ions (polarized protons, polarized deuterons, polarized <sup>3</sup>He, and unpolarized heavy ions up to Uranium) at center-of-mass energies of 15–20 GeV and luminosity of (2–4)<span><math><mrow><mo>×</mo><mn>1</mn><msup><mrow><mn>0</mn></mrow><mrow><mn>33</mn></mrow></msup></mrow></math></span> cm<sup>−2</sup>s<sup>−1</sup>. Its primary physics objectives include 3D tomography of nucleon spin and momentum structure, fundamental questions regarding the origin of nucleon mass, partonic structure of nuclei and parton interactions with the nuclear environment, and exploration of exotic hadronic states. In this paper, we review the physics potential of the EicC and highlight its unique capabilities for advancing precision nucleon structure studies by combining its specialized kinematic coverage and high luminosity. Since traditional topics like 3D nucleon structure have already been well-covered by several extensive reviews, we have deliberately dedicated significant space to recent progress in nucleon mass decomposition, nucleon energy-energy correlation, quantum information, and artificial intelligence applications in high-energy nuclear physics, which have been emerging rapidly and attracted a tremendous amount of attention in the community.</div></div>","PeriodicalId":412,"journal":{"name":"Progress in Particle and Nuclear Physics","volume":"151 ","pages":"Article 104264"},"PeriodicalIF":15.9,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148852772","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}
Pub Date : 2026-07-01Epub Date: 2026-06-17DOI: 10.1016/j.ppnp.2026.104251
Danilo Gambacurta, Marcella Grasso
In this review, we discuss the most recent developments and applications of the Subtracted Second RPA (SSRPA), an extension of the Second RPA (SRPA), which overcomes its pathological issues encountered within the Energy Density Functional theory. After recalling the formal properties of the SRPA and SSRPA, the anomalous behavior of SRPA is shown and discussed by presenting several applications with different kinds of nuclear interactions. The most recent pathology-free SSRPA studies are then presented both for charge-conserving and charge-exchange nuclear excitations. The comparison with experimental data is presented to assess and quantify the improvement introduced by the SSRPA with respect to the RPA and SRPA. The impact of beyond-mean-field correlations induced in SSRPA is also qualitatively estimated in connection with the modeling of the nuclear equation of state. We conclude by discussing the future perspectives of the SSRPA, focusing on its potential connections with some current experimental challenges and outlining necessary theoretical extensions and numerical developments.
{"title":"Recent applications of the subtracted second RPA method","authors":"Danilo Gambacurta, Marcella Grasso","doi":"10.1016/j.ppnp.2026.104251","DOIUrl":"10.1016/j.ppnp.2026.104251","url":null,"abstract":"<div><div>In this review, we discuss the most recent developments and applications of the Subtracted Second RPA (SSRPA), an extension of the Second RPA (SRPA), which overcomes its pathological issues encountered within the Energy Density Functional theory. After recalling the formal properties of the SRPA and SSRPA, the anomalous behavior of SRPA is shown and discussed by presenting several applications with different kinds of nuclear interactions. The most recent pathology-free SSRPA studies are then presented both for charge-conserving and charge-exchange nuclear excitations. The comparison with experimental data is presented to assess and quantify the improvement introduced by the SSRPA with respect to the RPA and SRPA. The impact of beyond-mean-field correlations induced in SSRPA is also qualitatively estimated in connection with the modeling of the nuclear equation of state. We conclude by discussing the future perspectives of the SSRPA, focusing on its potential connections with some current experimental challenges and outlining necessary theoretical extensions and numerical developments.</div></div>","PeriodicalId":412,"journal":{"name":"Progress in Particle and Nuclear Physics","volume":"150 ","pages":"Article 104251"},"PeriodicalIF":15.9,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148311725","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}
Pub Date : 2026-07-01Epub Date: 2026-06-17DOI: 10.1016/j.ppnp.2026.104252
Terry Mart, Jovan Alfian Djaja, Daniel S. Carman
<div><div>Studies of the electromagnetic production of strange quarks began in the 1950s as something of a curiosity that puzzled experimentalists and theorists alike. Eventually, a nascent understanding of these processes began to take shape through the first pioneering experiments dedicated to explore photo- and electroproduction that were carried out in the period from the 1950s to the 1980s. As the datasets increased, concomitant advances in theoretical models were realized. However, these initial studies also made clear that more precise data was essential to continue to move forward. A paradigm shift occurred in the 1990s with the development of second-generation facilities at ELSA, MAMI, SPring-8, and JLab. High-intensity, high duty-factor accelerators, coupled with novel detector systems and advances in computing and readout electronics, brought nuclear physics experiments forward by orders of magnitude in counting statistics compared to the first-generation efforts. This was an utter boon to strangeness physics investigations, and to date, more than 50 dedicated experiments in kaon photo- and electroproduction have been completed at facilities around the world, leading to a host of experimental observables that have enabled significant advances in the exploration of strongly interacting systems that decay via <span><math><mrow><mi>s</mi><mover><mrow><mi>s</mi></mrow><mrow><mo>̄</mo></mrow></mover></mrow></math></span> quark pair creation. These data have proven to be an essential complementary pathway to study the spectrum and structure of the excited states of the nucleon, and the search for missing and exotic baryon configurations. As well, investigations in these channels are requisite for exploring hypernuclear production as a probe of the <span><math><mrow><mi>Y</mi><mi>N</mi></mrow></math></span> interaction and for studies of the electromagnetic form factors of strange mesons. This review was designed to provide the first-ever in-depth overview of both the experimental and theoretical progress in the field of the electromagnetic production of strangeness. This work looks back over 70 years of past developments, discusses ongoing work and near-term plans, and details future possibilities being considered for third-generation facilities. Extensive lists of the available datasets and theoretical models are provided, together with a comprehensive supporting bibliography of the field. Throughout this work, the primary impacts of these explorations are highlighted, along with connections to a wide range of related phenomenological applications. An important goal of this review is to provide a complete, (reasonably) self-contained guide into this field prepared at a level that is relevant for both new and seasoned scientists, whether experimentalists, phenomenologists, or theorists, to better understand what has been accomplished by so many dedicated folks—each building on what has come before—and to appreciate the exciting future potent
{"title":"Electromagnetic production of kaons on the nucleon","authors":"Terry Mart, Jovan Alfian Djaja, Daniel S. Carman","doi":"10.1016/j.ppnp.2026.104252","DOIUrl":"10.1016/j.ppnp.2026.104252","url":null,"abstract":"<div><div>Studies of the electromagnetic production of strange quarks began in the 1950s as something of a curiosity that puzzled experimentalists and theorists alike. Eventually, a nascent understanding of these processes began to take shape through the first pioneering experiments dedicated to explore photo- and electroproduction that were carried out in the period from the 1950s to the 1980s. As the datasets increased, concomitant advances in theoretical models were realized. However, these initial studies also made clear that more precise data was essential to continue to move forward. A paradigm shift occurred in the 1990s with the development of second-generation facilities at ELSA, MAMI, SPring-8, and JLab. High-intensity, high duty-factor accelerators, coupled with novel detector systems and advances in computing and readout electronics, brought nuclear physics experiments forward by orders of magnitude in counting statistics compared to the first-generation efforts. This was an utter boon to strangeness physics investigations, and to date, more than 50 dedicated experiments in kaon photo- and electroproduction have been completed at facilities around the world, leading to a host of experimental observables that have enabled significant advances in the exploration of strongly interacting systems that decay via <span><math><mrow><mi>s</mi><mover><mrow><mi>s</mi></mrow><mrow><mo>̄</mo></mrow></mover></mrow></math></span> quark pair creation. These data have proven to be an essential complementary pathway to study the spectrum and structure of the excited states of the nucleon, and the search for missing and exotic baryon configurations. As well, investigations in these channels are requisite for exploring hypernuclear production as a probe of the <span><math><mrow><mi>Y</mi><mi>N</mi></mrow></math></span> interaction and for studies of the electromagnetic form factors of strange mesons. This review was designed to provide the first-ever in-depth overview of both the experimental and theoretical progress in the field of the electromagnetic production of strangeness. This work looks back over 70 years of past developments, discusses ongoing work and near-term plans, and details future possibilities being considered for third-generation facilities. Extensive lists of the available datasets and theoretical models are provided, together with a comprehensive supporting bibliography of the field. Throughout this work, the primary impacts of these explorations are highlighted, along with connections to a wide range of related phenomenological applications. An important goal of this review is to provide a complete, (reasonably) self-contained guide into this field prepared at a level that is relevant for both new and seasoned scientists, whether experimentalists, phenomenologists, or theorists, to better understand what has been accomplished by so many dedicated folks—each building on what has come before—and to appreciate the exciting future potent","PeriodicalId":412,"journal":{"name":"Progress in Particle and Nuclear Physics","volume":"150 ","pages":"Article 104252"},"PeriodicalIF":15.9,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148311727","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}
We review the role of the anomalous magnetic moment of the muon as a powerful probe of physics beyond the Standard Model (BSM), taking advantage of the final result of the Fermilab experiment and the recently updated Standard Model value. This review provides both a comprehensive summary of the current status, as well as an accessible entry point for phenomenologists with interests in dark matter, Higgs and electroweak or neutrino and flavour physics in the context of a wide range of BSM scenarios. It begins with a qualitative overview of the field and a collection of key properties and typical results. It then focuses on model-independent, generic formulas and classifies types of BSM scenarios with or without chiral enhancements. A strong emphasis of the review are the connections to a large number of other observables — ranging from the muon mass and the muon–Higgs coupling and related dipole observables to dark matter, neutrino masses and high-energy collider observables. Finally, we survey a number of well-motivated BSM scenarios such as dark photons, axion-like particles, the two-Higgs doublet model, supersymmetric models and models with leptoquarks, vector-like leptons or neutrino mass models. We discuss the impact of the updated Standard Model value for and of complementary constraints, exploring the phenomenology and identifying excluded and viable parameter regions.
{"title":"The muon magnetic moment and physics beyond the standard model","authors":"Peter Athron , Kilian Möhling , Dominik Stöckinger , Hyejung Stöckinger-Kim","doi":"10.1016/j.ppnp.2025.104225","DOIUrl":"10.1016/j.ppnp.2025.104225","url":null,"abstract":"<div><div>We review the role of the anomalous magnetic moment of the muon <span><math><msub><mrow><mi>a</mi></mrow><mrow><mi>μ</mi></mrow></msub></math></span> as a powerful probe of physics beyond the Standard Model (BSM), taking advantage of the final result of the Fermilab <span><math><mrow><mi>g</mi><mo>−</mo><mn>2</mn></mrow></math></span> experiment and the recently updated Standard Model value. This review provides both a comprehensive summary of the current status, as well as an accessible entry point for phenomenologists with interests in dark matter, Higgs and electroweak or neutrino and flavour physics in the context of a wide range of BSM scenarios. It begins with a qualitative overview of the field and a collection of key properties and typical results. It then focuses on model-independent, generic formulas and classifies types of BSM scenarios with or without chiral enhancements. A strong emphasis of the review are the connections to a large number of other observables — ranging from the muon mass and the muon–Higgs coupling and related dipole observables to dark matter, neutrino masses and high-energy collider observables. Finally, we survey a number of well-motivated BSM scenarios such as dark photons, axion-like particles, the two-Higgs doublet model, supersymmetric models and models with leptoquarks, vector-like leptons or neutrino mass models. We discuss the impact of the updated Standard Model value for <span><math><msub><mrow><mi>a</mi></mrow><mrow><mi>μ</mi></mrow></msub></math></span> and of complementary constraints, exploring the phenomenology and identifying excluded and viable parameter regions.</div></div>","PeriodicalId":412,"journal":{"name":"Progress in Particle and Nuclear Physics","volume":"148 ","pages":"Article 104225"},"PeriodicalIF":17.9,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145962509","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}
Pub Date : 2026-03-01Epub Date: 2026-02-24DOI: 10.1016/j.ppnp.2026.104234
Munshi G. Mustafa , Aritra Bandyopadhyay , Chowdhury Aminul Islam
This review has explored the fundamental principles of thermal field theory in the context of a background magnetic field, highlighting its theoretical framework and some of its applications to the thermo-magnetic QCD plasma generated in heavy-ion collisions. Our discussion has been limited to equilibrium systems for clarity and conciseness. We analysed bulk thermodynamic characteristics including the phase diagram as well as real-time observables, shedding light on the behaviour and dynamics of the thermo-magnetic QCD medium relevant to heavy-ion physics.
{"title":"Thermal field theory in the presence of a background magnetic field and its application to QCD","authors":"Munshi G. Mustafa , Aritra Bandyopadhyay , Chowdhury Aminul Islam","doi":"10.1016/j.ppnp.2026.104234","DOIUrl":"10.1016/j.ppnp.2026.104234","url":null,"abstract":"<div><div>This review has explored the fundamental principles of thermal field theory in the context of a background magnetic field, highlighting its theoretical framework and some of its applications to the thermo-magnetic QCD plasma generated in heavy-ion collisions. Our discussion has been limited to equilibrium systems for clarity and conciseness. We analysed bulk thermodynamic characteristics including the phase diagram as well as real-time observables, shedding light on the behaviour and dynamics of the thermo-magnetic QCD medium relevant to heavy-ion physics.</div></div>","PeriodicalId":412,"journal":{"name":"Progress in Particle and Nuclear Physics","volume":"148 ","pages":"Article 104234"},"PeriodicalIF":17.9,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147278573","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}
Pub Date : 2026-03-01Epub Date: 2026-05-05DOI: 10.1016/j.ppnp.2026.104243
Th.A. Rijken , Y. Yamamoto , M.M. Nagels
<div><h3>Background:</h3><div>The Nijmegen extended-soft-core (ESC) models treat in a unified way, using broken flavor SU(3) symmetry, the low- and intermediate-energy interactions of nucleon–nucleon (NN), hyperon–nucleon (YN), and hyperon–hyperon/nucleon (YY/<span><math><mi>Ξ</mi></math></span>N) systems with strangeness S=0,-1,-2,-3,-4 respectively. The potentials consist of local and non-local potentials due to (i) One-boson exchanges (OBE), which are the members of nonets of pseudoscalar-, vector-, scalar-, and axial-vector mesons, (ii) Two pseudoscalar exchange (TPS), (iii) Meson-Pair-exchange (MPE) and (iv) Diffractive exchanges. Both the OBE- and Pair-vertices are regulated by Gaussian form factors producing potentials with a soft behavior near the origin. Broken SU(3) symmetry serves to connect the NN, YN and YY channels. In particular, the meson–baryon coupling constants are calculated via SU(3) using the coupling constants of the NN-analysis as input. The assignment of the cut-off masses for the BBM-vertices is dependent on the SU(3)-classification of the exchanged mesons for OBE, and a similar scheme for MPE.</div></div><div><h3>Purpose:</h3><div>The NN,YN,YY results presented are those from ESC16, which is the latest version of the ESC-potential model for Baryon–Baryon (BB) scattering. The two body BB-potentials are also applied to the hyperonic many-body systems. Next to the standard ingredients of the ESC-models, in the ESC16 version a contribution of the short range repulsion due to the quark Pauli-principle in the BB-channels has been included systematically for the first time.</div></div><div><h3>Methods:</h3><div>In this review the (new) derivation of the potentials is based on the formulation of relativistic quantum field theory (RQFT) as developed by Kadyshevsky. Here, in contrast to the usual Feynman formulation, the particles in the Kadyshevsky graphs remain on-mass-shell also in the intermediate states. This implies that Gaussian form factors, a characteristic of the soft-core models, are well-defined and can be handled easily in the Kadyshevsky formalism. Furthermore, pair-suppression can be handled phenomenological by introducing factors at the vertices without conflict with relativistic invariance.</div><div>Major novel ingredients with respect to the former versions ESC04–ESC08 is the inclusion of (i) short-range Odderon-potentials corresponding to the odd numbers of gluon-exchanges next to the Pomeron-potentials representing the even number of gluon-exchanges, (ii) short range repulsion in all NN, YN and YY channels due to Pauli-forbidden six-quark cluster <span><math><msup><mrow><mrow><mo>(</mo><mn>0</mn><mi>s</mi><mo>)</mo></mrow></mrow><mrow><mn>6</mn></mrow></msup></math></span>-configurations. Further new elements are (a) the extension of the <span><math><mrow><msup><mrow><mi>J</mi></mrow><mrow><mi>P</mi><mi>C</mi></mrow></msup><mo>=</mo><msup><mrow><mn>1</mn></mrow><mrow><mo>+</mo><mo>+</mo></mrow></msup></mrow><
{"title":"Extended soft-core baryon–baryon interactions","authors":"Th.A. Rijken , Y. Yamamoto , M.M. Nagels","doi":"10.1016/j.ppnp.2026.104243","DOIUrl":"10.1016/j.ppnp.2026.104243","url":null,"abstract":"<div><h3>Background:</h3><div>The Nijmegen extended-soft-core (ESC) models treat in a unified way, using broken flavor SU(3) symmetry, the low- and intermediate-energy interactions of nucleon–nucleon (NN), hyperon–nucleon (YN), and hyperon–hyperon/nucleon (YY/<span><math><mi>Ξ</mi></math></span>N) systems with strangeness S=0,-1,-2,-3,-4 respectively. The potentials consist of local and non-local potentials due to (i) One-boson exchanges (OBE), which are the members of nonets of pseudoscalar-, vector-, scalar-, and axial-vector mesons, (ii) Two pseudoscalar exchange (TPS), (iii) Meson-Pair-exchange (MPE) and (iv) Diffractive exchanges. Both the OBE- and Pair-vertices are regulated by Gaussian form factors producing potentials with a soft behavior near the origin. Broken SU(3) symmetry serves to connect the NN, YN and YY channels. In particular, the meson–baryon coupling constants are calculated via SU(3) using the coupling constants of the NN-analysis as input. The assignment of the cut-off masses for the BBM-vertices is dependent on the SU(3)-classification of the exchanged mesons for OBE, and a similar scheme for MPE.</div></div><div><h3>Purpose:</h3><div>The NN,YN,YY results presented are those from ESC16, which is the latest version of the ESC-potential model for Baryon–Baryon (BB) scattering. The two body BB-potentials are also applied to the hyperonic many-body systems. Next to the standard ingredients of the ESC-models, in the ESC16 version a contribution of the short range repulsion due to the quark Pauli-principle in the BB-channels has been included systematically for the first time.</div></div><div><h3>Methods:</h3><div>In this review the (new) derivation of the potentials is based on the formulation of relativistic quantum field theory (RQFT) as developed by Kadyshevsky. Here, in contrast to the usual Feynman formulation, the particles in the Kadyshevsky graphs remain on-mass-shell also in the intermediate states. This implies that Gaussian form factors, a characteristic of the soft-core models, are well-defined and can be handled easily in the Kadyshevsky formalism. Furthermore, pair-suppression can be handled phenomenological by introducing factors at the vertices without conflict with relativistic invariance.</div><div>Major novel ingredients with respect to the former versions ESC04–ESC08 is the inclusion of (i) short-range Odderon-potentials corresponding to the odd numbers of gluon-exchanges next to the Pomeron-potentials representing the even number of gluon-exchanges, (ii) short range repulsion in all NN, YN and YY channels due to Pauli-forbidden six-quark cluster <span><math><msup><mrow><mrow><mo>(</mo><mn>0</mn><mi>s</mi><mo>)</mo></mrow></mrow><mrow><mn>6</mn></mrow></msup></math></span>-configurations. Further new elements are (a) the extension of the <span><math><mrow><msup><mrow><mi>J</mi></mrow><mrow><mi>P</mi><mi>C</mi></mrow></msup><mo>=</mo><msup><mrow><mn>1</mn></mrow><mrow><mo>+</mo><mo>+</mo></mrow></msup></mrow><","PeriodicalId":412,"journal":{"name":"Progress in Particle and Nuclear Physics","volume":"149 ","pages":"Article 104243"},"PeriodicalIF":17.9,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147850615","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}
Pub Date : 2026-03-01Epub Date: 2026-03-19DOI: 10.1016/j.ppnp.2026.104242
Johann Haidenbauer , Ulf-G. Meißner , Andreas Nogga
Hypernuclei are bound states of neutrons, protons and one or two hyperons, thus extending the nuclear landscape to a third dimension. They also encode information about the baryon–baryon and three-baryon interactions. Here, we review recent work on chiral effective field theory for two- and three-baryon interactions and their application in nuclei based on ab initio methods. These include the Faddeev–Yakubovsky equations, the no-core–shell-model (NCSM) and nuclear lattice effective field theory (NLEFT). Besides of providing an overview of the formalisms explicit results for the separation energies of light hypernuclei are provided. Two-body and three-body forces are included consistently, in line with the underlying power counting. Calculations of hypernuclei within the NCSM, performed up to A=7 so far, suggest that agreement with the experimental binding energies can be achieved once appropriate three-body forces are taken into account. Similar conclusions are drawn from the study based on NLEFT, where even hypernuclei up to A=16 can be computed. Additionally, applications of ab initio approaches in calculations of and hypernuclei are discussed and possible candidates for the lightest systems that could be bound are identified, namely He and H.
{"title":"Ab initio description of hypernuclei","authors":"Johann Haidenbauer , Ulf-G. Meißner , Andreas Nogga","doi":"10.1016/j.ppnp.2026.104242","DOIUrl":"10.1016/j.ppnp.2026.104242","url":null,"abstract":"<div><div>Hypernuclei are bound states of neutrons, protons and one or two hyperons, thus extending the nuclear landscape to a third dimension. They also encode information about the baryon–baryon and three-baryon interactions. Here, we review recent work on chiral effective field theory for two- and three-baryon interactions and their application in nuclei based on <em>ab initio</em> methods. These include the Faddeev–Yakubovsky equations, the no-core–shell-model (NCSM) and nuclear lattice effective field theory (NLEFT). Besides of providing an overview of the formalisms explicit results for the separation energies of light <span><math><mi>Λ</mi></math></span> hypernuclei are provided. Two-body and three-body forces are included consistently, in line with the underlying power counting. Calculations of <span><math><mi>Λ</mi></math></span> hypernuclei within the NCSM, performed up to A=7 so far, suggest that agreement with the experimental binding energies can be achieved once appropriate three-body forces are taken into account. Similar conclusions are drawn from the study based on NLEFT, where even hypernuclei up to A=16 can be computed. Additionally, applications of <em>ab initio</em> approaches in calculations of <span><math><mrow><mi>Λ</mi><mi>Λ</mi></mrow></math></span> and <span><math><mi>Ξ</mi></math></span> hypernuclei are discussed and possible candidates for the lightest systems that could be bound are identified, namely <span><math><msubsup><mrow></mrow><mrow><mi>Λ</mi><mi>Λ</mi></mrow><mrow><mspace></mspace><mspace></mspace><mn>5</mn></mrow></msubsup></math></span>He and <span><math><msubsup><mrow></mrow><mrow><mi>Ξ</mi></mrow><mrow><mn>4</mn></mrow></msubsup></math></span>H.</div></div>","PeriodicalId":412,"journal":{"name":"Progress in Particle and Nuclear Physics","volume":"149 ","pages":"Article 104242"},"PeriodicalIF":17.9,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147495534","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}
Pub Date : 2026-03-01Epub Date: 2026-01-30DOI: 10.1016/j.ppnp.2026.104233
Kristina D. Launey , Grigor H. Sargsyan , Alexis Mercenne , Jutta E. Escher , Darin C. Mumma
In this review, we discuss recent applications of the ab initio symmetry-adapted no-core shell-model (SA-NCSM) theory for study and prediction of structure and reactions of stable and unstable nuclei from light to medium mass range. We explore structure properties of neutron-rich He, Li, and Mg isotopes, with a focus on nuclear collectivity, clustering, and spectroscopic factors, as well as multi-particle excitations of utmost significance in the proximity of the drip lines. In addition, we present extensions of the SA-NCSM with continuum for determining the microscopic structure of reaction fragments, which enables calculations of reaction cross sections for targets from the lightest He to 40Ca, rooted in first principles. We illustrate this for neutron and proton elastic scattering, deuteron and alpha capture reactions, and alpha knock-out reactions. Furthermore, we discuss microscopic optical potentials with uncertainty quantification, a critical ingredient in many reaction models. We also discuss the impact of alpha clustering on reactions of significance to nuclear astrophysics, as well as on beta decays and beyond-the-standard-model physics.
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The strong interaction, described within the Standard Model of particle physics by quantum chromodynamics (QCD), plays a fundamental role in understanding the structure and the stability of matter. Despite significant advances, the low-energy QCD regime remains poorly understood due to its non-perturbative nature. Kaonic atoms, in which a negatively charged kaon is bound to a nucleus via electromagnetic interaction, offer a unique experimental tool to investigate the strong interactions in the strangeness sector. Their study provides key information on the antikaon–nucleon interaction at threshold energy, essential for refining the relative theoretical models. This work reviews the current status of kaonic atom research, highlighting recent experimental findings and their impact on our understanding of the strong interaction. We discuss the formation processes, the role of X-ray spectroscopy in probing strong-interaction effects, and the latest results from DANE and J-PARC experimental facilities. Future perspectives, including planned experiments aimed at further improving the precision of the measurements and the potentiality of also measuring the high-n transitions as precision probes for quantum electrodynamics (QED) with strangeness, are also reviewed.
{"title":"Light kaonic atoms as probes of fundamental interactions in strange systems","authors":"Catalina Curceanu , Francesco Sgaramella , Massimiliano Bazzi , Tadashi Hashimoto , Mihail Iliescu , Alessandro Scordo , Diana Sirghi , Florin Sirghi","doi":"10.1016/j.ppnp.2026.104226","DOIUrl":"10.1016/j.ppnp.2026.104226","url":null,"abstract":"<div><div>The strong interaction, described within the Standard Model of particle physics by quantum chromodynamics (QCD), plays a fundamental role in understanding the structure and the stability of matter. Despite significant advances, the low-energy QCD regime remains poorly understood due to its non-perturbative nature. Kaonic atoms, in which a negatively charged kaon is bound to a nucleus via electromagnetic interaction, offer a unique experimental tool to investigate the strong interactions in the strangeness sector. Their study provides key information on the antikaon–nucleon interaction at threshold energy, essential for refining the relative theoretical models. This work reviews the current status of kaonic atom research, highlighting recent experimental findings and their impact on our understanding of the strong interaction. We discuss the formation processes, the role of X-ray spectroscopy in probing strong-interaction effects, and the latest results from DA<span><math><mi>Φ</mi></math></span>NE and J-PARC experimental facilities. Future perspectives, including planned experiments aimed at further improving the precision of the measurements and the potentiality of also measuring the high-n transitions as precision probes for quantum electrodynamics (QED) with strangeness, are also reviewed.</div></div>","PeriodicalId":412,"journal":{"name":"Progress in Particle and Nuclear Physics","volume":"147 ","pages":"Article 104226"},"PeriodicalIF":17.9,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145957102","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}
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