Nuclear Physics B最新文献

{"title":"Integrable sigma model with generalized F structure, Yang-Baxter sigma model with generalized complex structure and multi-Yang-Baxter sigma model","authors":"A. Rezaei-Aghdam,&nbsp;A. Taghavi","doi":"10.1016/j.nuclphysb.2024.116671","DOIUrl":"10.1016/j.nuclphysb.2024.116671","url":null,"abstract":"<div><p>We construct an integrable sigma model with a generalized <span><math><mi>F</mi></math></span> structure, which involves a generalized Nijenhuis structure <span><math><mi>J</mi></math></span> satisfying <span><math><msup><mrow><mi>J</mi></mrow><mrow><mn>3</mn></mrow></msup><mo>=</mo><mo>−</mo><mi>J</mi></math></span>. Utilizing the expression of the generalized complex structure on the metric Lie group manifold <em>G</em> in terms of operator relations on its Lie algebra <span><math><mi>g</mi></math></span>, we formulate a Yang-Baxter sigma model with a generalized complex structure. Additionally, we present multi-Yang-Baxter sigma models featuring two and three compatible Nijenhuis structures. Examples for each of these models are provided.</p></div>","PeriodicalId":54712,"journal":{"name":"Nuclear Physics B","volume":"1007 ","pages":"Article 116671"},"PeriodicalIF":2.5,"publicationDate":"2024-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0550321324002372/pdfft?md5=b11fed62dad4d217596d7079c9914fc1&pid=1-s2.0-S0550321324002372-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142151933","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":"Solving the Yang-Baxter, tetrahedron and higher simplex equations using Clifford algebras","authors":"Pramod Padmanabhan ,&nbsp;Vladimir Korepin","doi":"10.1016/j.nuclphysb.2024.116664","DOIUrl":"10.1016/j.nuclphysb.2024.116664","url":null,"abstract":"<div><p>Bethe Ansatz was discovered in 1932. Half a century later its algebraic structure was unearthed: Yang-Baxter equation was discovered, as well as its multidimensional generalizations [tetrahedron equation and <em>d</em>-simplex equations]. Here we describe a universal method to solve these equations using Clifford algebras. The Yang-Baxter equation (<span><math><mi>d</mi><mo>=</mo><mn>2</mn></math></span>), Zamolodchikov's tetrahedron equation (<span><math><mi>d</mi><mo>=</mo><mn>3</mn></math></span>) and the Bazhanov-Stroganov equation (<span><math><mi>d</mi><mo>=</mo><mn>4</mn></math></span>) are special cases. Our solutions form a linear space. This helps us to include spectral parameters. Potential applications are discussed.</p></div>","PeriodicalId":54712,"journal":{"name":"Nuclear Physics B","volume":"1007 ","pages":"Article 116664"},"PeriodicalIF":2.5,"publicationDate":"2024-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S055032132400230X/pdfft?md5=cacf76f9191ead08813e1b3c4b155908&pid=1-s2.0-S055032132400230X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142135887","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":"Single production of vectorlike quarks with charge 5/3 at the 14 TeV LHC","authors":"Yao-Bei Liu,&nbsp;Bo Hu,&nbsp;Chao-Zheng Li","doi":"10.1016/j.nuclphysb.2024.116667","DOIUrl":"10.1016/j.nuclphysb.2024.116667","url":null,"abstract":"<div><p>In a framework of the Standard Model (SM) simply extended by an SU(2) doublet <span><math><mo>(</mo><mi>X</mi><mo>,</mo><mi>T</mi><mo>)</mo></math></span> including a vectorlike <em>X</em>-quark (VLQ-<em>X</em>), with electric charge <span><math><mo>|</mo><msub><mrow><mi>Q</mi></mrow><mrow><mi>X</mi></mrow></msub><mo>|</mo><mo>=</mo><mn>5</mn><mo>/</mo><mn>3</mn></math></span>, we investigate the single production of the VLQ-<em>X</em> induced by the couplings between the VLQ-<em>X</em> with the first and the third generation quarks at the Large Hadron Collider (LHC) operating at <span><math><msqrt><mrow><mi>s</mi></mrow></msqrt><mo>=</mo><mn>14</mn></math></span> TeV. The signal is searched in events including same-sign dileptons (electrons or muons), one <em>b</em>-tagged jet and missing energy, where the <em>X</em> quark is assumed to decay into a top quark and a W boson, both decaying leptonically. After a rapid simulation of signal and background events, the 95% CL exclusion limits and the 5<em>σ</em> discovery reach are respectively obtained at the LHC with an integrated luminosity of 300 and 3000 fb⁻¹, respectively.</p></div>","PeriodicalId":54712,"journal":{"name":"Nuclear Physics B","volume":"1007 ","pages":"Article 116667"},"PeriodicalIF":2.5,"publicationDate":"2024-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0550321324002335/pdfft?md5=9e2d0bb1363543f72f3c6413ffbe2408&pid=1-s2.0-S0550321324002335-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142129908","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":"Renormalon-based resummation of Bjorken polarised sum rule in holomorphic QCD","authors":"César Ayala ,&nbsp;Camilo Castro-Arriaza ,&nbsp;Gorazd Cvetič","doi":"10.1016/j.nuclphysb.2024.116668","DOIUrl":"10.1016/j.nuclphysb.2024.116668","url":null,"abstract":"&lt;div&gt;&lt;p&gt;Approximate knowledge of the renormalon structure of the Bjorken polarised sum rule (BSR) &lt;span&gt;&lt;math&gt;&lt;msubsup&gt;&lt;mrow&gt;&lt;mover&gt;&lt;mrow&gt;&lt;mi&gt;Γ&lt;/mi&gt;&lt;/mrow&gt;&lt;mo&gt;‾&lt;/mo&gt;&lt;/mover&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;1&lt;/mn&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mi&gt;p&lt;/mi&gt;&lt;mo&gt;−&lt;/mo&gt;&lt;mi&gt;n&lt;/mi&gt;&lt;/mrow&gt;&lt;/msubsup&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;msup&gt;&lt;mrow&gt;&lt;mi&gt;Q&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;/mrow&gt;&lt;/msup&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;/math&gt;&lt;/span&gt; leads to the corresponding BSR characteristic function that allows us to evaluate the leading-twist part of BSR. In our previous work &lt;span&gt;&lt;span&gt;[1]&lt;/span&gt;&lt;/span&gt;, this evaluation (resummation) was performed using perturbative QCD (pQCD) coupling &lt;span&gt;&lt;math&gt;&lt;mi&gt;a&lt;/mi&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;msup&gt;&lt;mrow&gt;&lt;mi&gt;Q&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;/mrow&gt;&lt;/msup&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;mo&gt;≡&lt;/mo&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mi&gt;α&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mi&gt;s&lt;/mi&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;msup&gt;&lt;mrow&gt;&lt;mi&gt;Q&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;/mrow&gt;&lt;/msup&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;mo&gt;/&lt;/mo&gt;&lt;mi&gt;π&lt;/mi&gt;&lt;/math&gt;&lt;/span&gt; in specific renormalisation schemes. In the present paper, we continue this work, by using instead holomorphic couplings [&lt;span&gt;&lt;math&gt;&lt;mi&gt;a&lt;/mi&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;msup&gt;&lt;mrow&gt;&lt;mi&gt;Q&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;/mrow&gt;&lt;/msup&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;mo&gt;↦&lt;/mo&gt;&lt;mi&gt;A&lt;/mi&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;msup&gt;&lt;mrow&gt;&lt;mi&gt;Q&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;/mrow&gt;&lt;/msup&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;/math&gt;&lt;/span&gt;] that have no Landau singularities and thus require, in contrast to the pQCD case, no regularisation of the resummation formula. The &lt;span&gt;&lt;math&gt;&lt;mi&gt;D&lt;/mi&gt;&lt;mo&gt;=&lt;/mo&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;/math&gt;&lt;/span&gt; and &lt;span&gt;&lt;math&gt;&lt;mi&gt;D&lt;/mi&gt;&lt;mo&gt;=&lt;/mo&gt;&lt;mn&gt;4&lt;/mn&gt;&lt;/math&gt;&lt;/span&gt; terms are included in the Operator Product Expansion (OPE) of inelastic BSR, and fits are performed to the available experimental data in a specific interval &lt;span&gt;&lt;math&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;msubsup&gt;&lt;mrow&gt;&lt;mi&gt;Q&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mi&gt;min&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;/mrow&gt;&lt;/msubsup&gt;&lt;mo&gt;,&lt;/mo&gt;&lt;msubsup&gt;&lt;mrow&gt;&lt;mi&gt;Q&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mi&gt;max&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;/mrow&gt;&lt;/msubsup&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;/math&gt;&lt;/span&gt; where &lt;span&gt;&lt;math&gt;&lt;msubsup&gt;&lt;mrow&gt;&lt;mi&gt;Q&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mi&gt;max&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;/mrow&gt;&lt;/msubsup&gt;&lt;mo&gt;=&lt;/mo&gt;&lt;mn&gt;4.74&lt;/mn&gt;&lt;mspace&gt;&lt;/mspace&gt;&lt;msup&gt;&lt;mrow&gt;&lt;mi&gt;GeV&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;/mrow&gt;&lt;/msup&gt;&lt;/math&gt;&lt;/span&gt;. We needed relatively high &lt;span&gt;&lt;math&gt;&lt;msubsup&gt;&lt;mrow&gt;&lt;mi&gt;Q&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mi&gt;min&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;/mrow&gt;&lt;/msubsup&gt;&lt;mo&gt;≈&lt;/mo&gt;&lt;mn&gt;1.7&lt;/mn&gt;&lt;mspace&gt;&lt;/mspace&gt;&lt;msup&gt;&lt;mrow&gt;&lt;mi&gt;GeV&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;/mrow&gt;&lt;/msup&gt;&lt;/math&gt;&lt;/span&gt; in the pQCD case since the pQCD coupling &lt;span&gt;&lt;math&gt;&lt;mi&gt;a&lt;/mi&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;msup&gt;&lt;mrow&gt;&lt;mi&gt;Q&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;/mrow&gt;&lt;/msup&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;/math&gt;&lt;/span&gt; has Landau singularities at &lt;span&gt;&lt;math&gt;&lt;msup&gt;&lt;mrow&gt;&lt;mi&gt;Q&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;/mrow&gt;&lt;/msup&gt;&lt;mo&gt;≲&lt;/mo&gt;&lt;mn&gt;1&lt;/mn&gt;&lt;mspace&gt;&lt;/mspace&gt;&lt;msup&gt;&lt;mrow&gt;&lt;mi&gt;GeV&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;/mrow&gt;&lt;/msup&gt;&lt;/math&gt;&lt;/span&gt;. Now, when holomorphic (AQCD) couplings &lt;span&gt;&lt;math&gt;&lt;mi&gt;A&lt;/mi&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;msup&gt;&lt;mrow&gt;&lt;mi&gt;Q&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;/mrow&gt;&lt;/msup&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;/math&gt;&lt;/span&gt; are used, no such problems occur: for the 3&lt;em&gt;δ&lt;/em&gt;AQCD and 2&lt;em&gt;δ&lt;/em&gt;AQCD variants the preferred values are &lt;span&gt;&lt;math&gt;&lt;msubsup&gt;&lt;mrow&gt;&lt;mi","PeriodicalId":54712,"journal":{"name":"Nuclear Physics B","volume":"1007 ","pages":"Article 116668"},"PeriodicalIF":2.5,"publicationDate":"2024-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0550321324002347/pdfft?md5=842e663826ba637998a3b3b4e949dc52&pid=1-s2.0-S0550321324002347-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142129903","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":"Analysis of the hidden-charm-hidden-strange tetraquark mass spectrum via the QCD sum rules","authors":"Zhi-Gang Wang","doi":"10.1016/j.nuclphysb.2024.116661","DOIUrl":"10.1016/j.nuclphysb.2024.116661","url":null,"abstract":"<div><p>In the present work, we construct the diquark-antidiquark type four-quark currents to investigate the mass spectrum of the ground state hidden-charm-hidden-strange tetraquark states with the quantum numbers <span><math><msup><mrow><mi>J</mi></mrow><mrow><mi>P</mi><mi>C</mi></mrow></msup><mo>=</mo><msup><mrow><mn>0</mn></mrow><mrow><mo>+</mo><mo>+</mo></mrow></msup></math></span>, <span><math><msup><mrow><mn>1</mn></mrow><mrow><mo>+</mo><mo>−</mo></mrow></msup></math></span>, <span><math><msup><mrow><mn>1</mn></mrow><mrow><mo>+</mo><mo>+</mo></mrow></msup></math></span> and <span><math><msup><mrow><mn>2</mn></mrow><mrow><mo>+</mo><mo>+</mo></mrow></msup></math></span> via the traditional QCD sum rules in a comprehensive way. We update old calculations, perform new calculations and analysis in a rigorous way, and take account of the net light-flavor <span><math><mi>S</mi><mi>U</mi><mo>(</mo><mn>3</mn><mo>)</mo></math></span> breaking effects in a consistent way. And we make more reasonable identifications for the <span><math><mi>X</mi><mo>(</mo><mn>3960</mn><mo>)</mo></math></span>, <span><math><mi>X</mi><mo>(</mo><mn>4140</mn><mo>)</mo></math></span>, <span><math><mi>X</mi><mo>(</mo><mn>4274</mn><mo>)</mo></math></span>, <span><math><mi>X</mi><mo>(</mo><mn>4500</mn><mo>)</mo></math></span>, <span><math><mi>X</mi><mo>(</mo><mn>4685</mn><mo>)</mo></math></span> and <span><math><mi>X</mi><mo>(</mo><mn>4700</mn><mo>)</mo></math></span> and supersede some old identifications. Furthermore, we consider our previous theoretical predictions, and make reasonable/suitable identifications of the new LHCb states <span><math><msub><mrow><mi>h</mi></mrow><mrow><mi>c</mi></mrow></msub><mo>(</mo><mn>4000</mn><mo>)</mo></math></span> and <span><math><msub><mrow><mi>χ</mi></mrow><mrow><mi>c</mi><mn>1</mn></mrow></msub><mo>(</mo><mn>4010</mn><mo>)</mo></math></span>.</p></div>","PeriodicalId":54712,"journal":{"name":"Nuclear Physics B","volume":"1007 ","pages":"Article 116661"},"PeriodicalIF":2.5,"publicationDate":"2024-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S055032132400227X/pdfft?md5=f9daa39e36cacb33804a8ae1d5bb3ffd&pid=1-s2.0-S055032132400227X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142151951","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":"Minimal type-I Dirac seesaw and leptogenesis under A4 modular invariance","authors":"Labh Singh ,&nbsp;Monal Kashav ,&nbsp;Surender Verma","doi":"10.1016/j.nuclphysb.2024.116666","DOIUrl":"10.1016/j.nuclphysb.2024.116666","url":null,"abstract":"<div><p>We present a Dirac mass model based on <span><math><msub><mrow><mi>A</mi></mrow><mrow><mn>4</mn></mrow></msub></math></span> modular symmetry within Type-I seesaw framework. This extension of Standard Model requires three right-handed neutrinos and three heavy Dirac fermions superfields, all singlet under <span><math><mi>S</mi><mi>U</mi><msub><mrow><mo>(</mo><mn>2</mn><mo>)</mo></mrow><mrow><mi>L</mi></mrow></msub></math></span> symmetry. The scalar sector is extended by the inclusion of a <span><math><mi>S</mi><mi>U</mi><msub><mrow><mo>(</mo><mn>2</mn><mo>)</mo></mrow><mrow><mi>L</mi></mrow></msub></math></span> singlet superfield, <em>χ</em>. Here, the modular symmetry plays a crucial role as the Yukawa couplings acquire modular forms, which are expressed in terms of Dedekind eta function <span><math><mi>η</mi><mo>(</mo><mi>τ</mi><mo>)</mo></math></span>. Therefore, the Yukawa couplings follow transformations akin to other matter fields, thereby obviating the necessity of additional flavon fields. The acquisition of <em>vev</em> by complex modulus <em>τ</em> leads to the breaking of <span><math><msub><mrow><mi>A</mi></mrow><mrow><mn>4</mn></mrow></msub></math></span> modular symmetry. We have obtained predictions on neutrino oscillation parameters, for example, the normal hierarchy for the neutrino mass spectrum. Furthermore, we find that heavy Dirac fermions, in our model, can decay to produce observed baryon asymmetry of the Universe through Dirac leptogenesis.</p></div>","PeriodicalId":54712,"journal":{"name":"Nuclear Physics B","volume":"1007 ","pages":"Article 116666"},"PeriodicalIF":2.5,"publicationDate":"2024-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0550321324002323/pdfft?md5=cde8b6196aa22e8df5a2c85eed084c8a&pid=1-s2.0-S0550321324002323-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142122013","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":"Magnetization without spin: Effective Lagrangian of itinerant electrons","authors":"Kenzo Ishikawa","doi":"10.1016/j.nuclphysb.2024.116663","DOIUrl":"10.1016/j.nuclphysb.2024.116663","url":null,"abstract":"<div><p>In this paper, an effective Lagrangian of an itinerant electron system of finite density at a finite magnetic field is obtained. It includes a Chern-Simons term of electromagnetic potentials of lower-scale dimensions compared to those studied before. This term has an origin in the many-body wave function and a unique topological property that is independent of a spin degree of freedom. The coupling strength is proportional to <span><math><mfrac><mrow><mi>ρ</mi></mrow><mrow><mi>e</mi><mi>B</mi></mrow></mfrac></math></span>, which is singular at <span><math><mi>B</mi><mo>=</mo><mn>0</mn></math></span> for a constant charge density. The effective Lagrangian at a finite <em>B</em> represents the physical effects at <span><math><mi>B</mi><mo>≠</mo><mn>0</mn></math></span> properly. A universal shift of the magnetic field known as the Slater-Pauling curve is obtained from the effective Lagrangian.</p></div>","PeriodicalId":54712,"journal":{"name":"Nuclear Physics B","volume":"1007 ","pages":"Article 116663"},"PeriodicalIF":2.5,"publicationDate":"2024-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0550321324002293/pdfft?md5=29e112f1de1b1ce3b311b8bcfaabb079&pid=1-s2.0-S0550321324002293-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142121742","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":"Symmetries of modified Dirac operators in supergravity flux backgrounds","authors":"Ümit Ertem","doi":"10.1016/j.nuclphysb.2024.116665","DOIUrl":"10.1016/j.nuclphysb.2024.116665","url":null,"abstract":"<div><p>Modifications of Dirac operators in supergravity flux backgrounds are considered. Modified spin curvature operators and squares of modified Dirac operators corresponding to Schrödinger-Lichnerowicz-like formulas are obtained for different types of flux modifications. Symmetry operators of modified massless and massive Dirac equations are found in terms of modified Killing-Yano and modified conformal Killing-Yano forms. Extra constraints for symmetry operators in terms of different types of fluxes and modified Killing-Yano forms are determined.</p></div>","PeriodicalId":54712,"journal":{"name":"Nuclear Physics B","volume":"1007 ","pages":"Article 116665"},"PeriodicalIF":2.5,"publicationDate":"2024-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0550321324002311/pdfft?md5=93cf759d668d5e66a734d952c018dd5d&pid=1-s2.0-S0550321324002311-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142098803","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":"Hybrid branes from split kinks","authors":"D. Bazeia ,&nbsp;A.S. Lobão ,&nbsp;M.A. Marques","doi":"10.1016/j.nuclphysb.2024.116662","DOIUrl":"10.1016/j.nuclphysb.2024.116662","url":null,"abstract":"<div><p>In this work, we investigate braneworld models generated by scalar fields in which one field has a split kink profile, in which a kink separates into two kinklike configurations. Our analysis covers models with two and three fields, examining the behavior of the most important quantities associated with the brane, such as the warp factor and the stability of the corresponding gravity sector. The results show that the brane is stable and supports a hybrid character, behaving as a thin and thick configuration.</p></div>","PeriodicalId":54712,"journal":{"name":"Nuclear Physics B","volume":"1007 ","pages":"Article 116662"},"PeriodicalIF":2.5,"publicationDate":"2024-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0550321324002281/pdfft?md5=c57a0d82b228337eb4f136935d48c3c9&pid=1-s2.0-S0550321324002281-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142087565","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":"Stability and phase transition of black holes in Einstein-Maxwell-dilaton gravity","authors":"K. Ghaderi ,&nbsp;Anirudh Pradhan ,&nbsp;A. Mahmoodzadeh","doi":"10.1016/j.nuclphysb.2024.116660","DOIUrl":"10.1016/j.nuclphysb.2024.116660","url":null,"abstract":"<div><p>In this research, we study black hole stability and phase transition in Einstein-Maxwell-dilaton (EMD) gravity. A dilaton field is non-minimally related to the Maxwell field in the EMD gravity and is an intriguing alternative for General Relativity. By using the thermodynamic laws of the black holes, temperature, entropy, heat capacity, pressure, critical points and Gibbs free energy of charged static dilaton black holes in EMD gravity were all thoroughly explored and effects of dilaton constant on these quantities are studied and the results are compared with Schwarzschild, Reissner-Nordström, and Gibbons-Maeda-Garfinkle-Horowitz-Strominger (GMGHS) black holes. In other cases, the system has stable and unstable areas. Since the heat capacity is discontinuous, the system experiences a phase transition, and Van der Waals-like phase transitions occur between the small and large black holes. It has been observed that the heat capacity for the GMGHS and Schwarzschild black holes is always negative, making these systems unstable.</p></div>","PeriodicalId":54712,"journal":{"name":"Nuclear Physics B","volume":"1006 ","pages":"Article 116660"},"PeriodicalIF":2.5,"publicationDate":"2024-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0550321324002268/pdfft?md5=d9085f0080a428327bf8855395ebd3e1&pid=1-s2.0-S0550321324002268-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142084287","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}