Pub Date : 2025-02-01DOI: 10.1016/j.nuclphysb.2025.116807
Marek Olechowski
Multibrane 5-dimensional models with a warped extra spatial dimension compactified on an orbifold are investigated. The Goldberger-Wise field, with appropriate bulk and brane potentials, is utilized to fix the brane positions. However, not all configurations with fixed brane positions are stable. Stability against small scalar perturbations of the metric and the Goldberger-Wise field was so far analyzed only for 2-brane models. Generalization of such analysis for multibrane models is the main subject of the present work. Stability of brane configurations is closely related to the spectrum of radions: namely, the existence of any tachyonic radion indicates instability, while models with positive squared masses for all radions are stable. The necessary and sufficient conditions for each of these possibilities are derived for multibrane models and constitute the main result of this paper. Additionally, some properties of radions, particularly their relation to distances between and along branes, are discussed.
{"title":"Stability of multibrane models","authors":"Marek Olechowski","doi":"10.1016/j.nuclphysb.2025.116807","DOIUrl":"10.1016/j.nuclphysb.2025.116807","url":null,"abstract":"<div><div>Multibrane 5-dimensional models with a warped extra spatial dimension compactified on an <span><math><msup><mrow><mi>S</mi></mrow><mrow><mn>1</mn></mrow></msup><mo>/</mo><msub><mrow><mi>Z</mi></mrow><mrow><mn>2</mn></mrow></msub></math></span> orbifold are investigated. The Goldberger-Wise field, with appropriate bulk and brane potentials, is utilized to fix the brane positions. However, not all configurations with fixed brane positions are stable. Stability against small scalar perturbations of the metric and the Goldberger-Wise field was so far analyzed only for 2-brane models. Generalization of such analysis for multibrane models is the main subject of the present work. Stability of brane configurations is closely related to the spectrum of radions: namely, the existence of any tachyonic radion indicates instability, while models with positive squared masses for all radions are stable. The necessary and sufficient conditions for each of these possibilities are derived for multibrane models and constitute the main result of this paper. Additionally, some properties of radions, particularly their relation to distances between and along branes, are discussed.</div></div>","PeriodicalId":54712,"journal":{"name":"Nuclear Physics B","volume":"1011 ","pages":"Article 116807"},"PeriodicalIF":2.5,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143176951","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}
In this work, we are interested in how spinning effects influence the electronic properties of the graphene wormhole. For this purpose, we have described the graphene by wormhole background based on the model developed by González and his co-workers. By applying a coordinate transformation in the metric of the graphene wormhole, we can introduce rotating effects. In the continuum limit, by solving the massless Dirac equation in the context of a rotating wormhole background, we obtain the Landau levels for the rotating graphene wormhole. We still have exposed the analogy between the graphene wormhole and fermions on the Gödel-type spacetime.
{"title":"Rotation effects on the graphene wormhole energy levels","authors":"G.Q. Garcia , P.J. Porfírio , C. Furtado , D.C. Moreira","doi":"10.1016/j.nuclphysb.2025.116793","DOIUrl":"10.1016/j.nuclphysb.2025.116793","url":null,"abstract":"<div><div>In this work, we are interested in how spinning effects influence the electronic properties of the graphene wormhole. For this purpose, we have described the graphene by wormhole background based on the model developed by González and his co-workers. By applying a coordinate transformation in the metric of the graphene wormhole, we can introduce rotating effects. In the continuum limit, by solving the massless Dirac equation in the context of a rotating wormhole background, we obtain the Landau levels for the rotating graphene wormhole. We still have exposed the analogy between the graphene wormhole and fermions on the Gödel-type spacetime.</div></div>","PeriodicalId":54712,"journal":{"name":"Nuclear Physics B","volume":"1011 ","pages":"Article 116793"},"PeriodicalIF":2.5,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143176915","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}
Pub Date : 2025-02-01DOI: 10.1016/j.nuclphysb.2025.116791
Iqra Ibrar, M. Sharif
This study analyzes the physical features of a gravastar within the gravity framework, where is the non-metricity scalar and is the trace of the energy-momentum tensor. Gravastars present a viable alternative to black holes, featuring a central de Sitter core, a surrounding thin shell and a dynamic layer in the Schwarzschild exterior that separates these two regions. Using the Finch-Skea metric, the necessary field equations for the core and shell are derived, while the Israel junction conditions maintain a seamless connection between the inner and outer regions. This work extensively explores crucial aspects such as energy distribution, proper length, energy conditions, entropy and the equation of state parameter. The model's stability is studied through the effective potential, redshift, causality conditions and adiabatic index. Our results highlight the essential role of modified gravity in maintaining the structural viability and stability of gravastars.
{"title":"Analyzing gravastar structure with the Finch-Skea metric in extended modified symmetric teleparallel gravity","authors":"Iqra Ibrar, M. Sharif","doi":"10.1016/j.nuclphysb.2025.116791","DOIUrl":"10.1016/j.nuclphysb.2025.116791","url":null,"abstract":"<div><div>This study analyzes the physical features of a gravastar within the <span><math><mi>f</mi><mo>(</mo><mi>Q</mi><mo>,</mo><mi>T</mi><mo>)</mo></math></span> gravity framework, where <span><math><mi>Q</mi></math></span> is the non-metricity scalar and <span><math><mi>T</mi></math></span> is the trace of the energy-momentum tensor. Gravastars present a viable alternative to black holes, featuring a central de Sitter core, a surrounding thin shell and a dynamic layer in the Schwarzschild exterior that separates these two regions. Using the Finch-Skea metric, the necessary field equations for the core and shell are derived, while the Israel junction conditions maintain a seamless connection between the inner and outer regions. This work extensively explores crucial aspects such as energy distribution, proper length, energy conditions, entropy and the equation of state parameter. The model's stability is studied through the effective potential, redshift, causality conditions and adiabatic index. Our results highlight the essential role of modified gravity in maintaining the structural viability and stability of gravastars.</div></div>","PeriodicalId":54712,"journal":{"name":"Nuclear Physics B","volume":"1011 ","pages":"Article 116791"},"PeriodicalIF":2.5,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143176917","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}
Pub Date : 2025-02-01DOI: 10.1016/j.nuclphysb.2025.116801
José Gaite
The critical behavior of three-state statistical models invariant under the full symmetry group and its dependence on space dimension have been a matter of interest and debate. In particular, the phase transition of the 3-state Potts model in three dimensions is believed to be of the first order, without a definitive proof of absence of scale invariance in three-dimensional field theory with symmetry. This scale invariance should appear as a non-trivial fixed point of the renormalization group, which has not been found. Our new search, with the non-perturbative renormalization group, finds such a fixed point, as a bifurcation from the trivial fixed point at the critical space dimension , which extends continuously to . It does not correspond to a second-order phase transition of the 3-state Potts model, but is interesting in its own right. In particular, it shows how the ε-expansion can fail.
{"title":"New renormalization group study of the 3-state Potts model and related statistical models","authors":"José Gaite","doi":"10.1016/j.nuclphysb.2025.116801","DOIUrl":"10.1016/j.nuclphysb.2025.116801","url":null,"abstract":"<div><div>The critical behavior of three-state statistical models invariant under the full symmetry group <span><math><msub><mrow><mi>S</mi></mrow><mrow><mn>3</mn></mrow></msub></math></span> and its dependence on space dimension have been a matter of interest and debate. In particular, the phase transition of the 3-state Potts model in three dimensions is believed to be of the first order, without a definitive proof of absence of scale invariance in three-dimensional field theory with <span><math><msub><mrow><mi>S</mi></mrow><mrow><mn>3</mn></mrow></msub></math></span> symmetry. This scale invariance should appear as a non-trivial fixed point of the renormalization group, which has not been found. Our new search, with the non-perturbative renormalization group, finds such a fixed point, as a bifurcation from the trivial fixed point at the critical space dimension <span><math><mi>d</mi><mo>=</mo><mn>10</mn><mo>/</mo><mn>3</mn></math></span>, which extends continuously to <span><math><mi>d</mi><mo>=</mo><mn>3</mn></math></span>. It does not correspond to a second-order phase transition of the 3-state Potts model, but is interesting in its own right. In particular, it shows how the <em>ε</em>-expansion can fail.</div></div>","PeriodicalId":54712,"journal":{"name":"Nuclear Physics B","volume":"1011 ","pages":"Article 116801"},"PeriodicalIF":2.5,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143176942","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}
Pub Date : 2025-02-01DOI: 10.1016/j.nuclphysb.2025.116792
Daniel Bockisch
We transform the one-loop four-point type I open superstring gluon amplitude to correlation functions on the celestial sphere including both the (non-)orientable planar and non-planar sector. This requires a Mellin transform with respect to the energies of the scattered strings, as well as to integrate over the open-string worldsheet moduli space. After accomplishing the former we obtain celestial string integrands with remaining worldsheet integrals , where β is related to the conformal scaling dimensions of the conformal primary operators under consideration. Employing an alternative approach of performing an -expansion of the open superstring amplitude first and Mellin transforming afterwards, we obtain a fully integrated expression, capturing the pole structure in the β-plane. The same analysis is performed at tree-level yielding similar results. We conclude by solving for specific values of β, consistently reproducing the results of the -expansion ansatz. In all approaches we find that the dependence on reduces to that of a simple overall factor of at loop and at tree level, consistent with previous literature.
{"title":"Celestial string integrands & their expansions","authors":"Daniel Bockisch","doi":"10.1016/j.nuclphysb.2025.116792","DOIUrl":"10.1016/j.nuclphysb.2025.116792","url":null,"abstract":"<div><div>We transform the one-loop four-point type I open superstring gluon amplitude to correlation functions on the celestial sphere including both the (non-)orientable planar and non-planar sector. This requires a Mellin transform with respect to the energies of the scattered strings, as well as to integrate over the open-string worldsheet moduli space. After accomplishing the former we obtain celestial string integrands with remaining worldsheet integrals <span><math><mi>Ψ</mi><mrow><mo>(</mo><mi>β</mi><mo>)</mo></mrow></math></span>, where <em>β</em> is related to the conformal scaling dimensions of the conformal primary operators under consideration. Employing an alternative approach of performing an <span><math><msup><mrow><mi>α</mi></mrow><mrow><mo>′</mo></mrow></msup></math></span>-expansion of the open superstring amplitude first and Mellin transforming afterwards, we obtain a fully integrated expression, capturing the pole structure in the <em>β</em>-plane. The same analysis is performed at tree-level yielding similar results. We conclude by solving <span><math><mi>Ψ</mi><mrow><mo>(</mo><mi>β</mi><mo>)</mo></mrow></math></span> for specific values of <em>β</em>, consistently reproducing the results of the <span><math><msup><mrow><mi>α</mi></mrow><mrow><mo>′</mo></mrow></msup></math></span>-expansion ansatz. In all approaches we find that the dependence on <span><math><msup><mrow><mi>α</mi></mrow><mrow><mo>′</mo></mrow></msup></math></span> reduces to that of a simple overall factor of <span><math><msup><mrow><mo>(</mo><msup><mrow><mi>α</mi></mrow><mrow><mo>′</mo></mrow></msup><mo>)</mo></mrow><mrow><mi>β</mi><mo>−</mo><mn>3</mn></mrow></msup></math></span> at loop and <span><math><msup><mrow><mo>(</mo><msup><mrow><mi>α</mi></mrow><mrow><mo>′</mo></mrow></msup><mo>)</mo></mrow><mrow><mi>β</mi></mrow></msup></math></span> at tree level, consistent with previous literature.</div></div>","PeriodicalId":54712,"journal":{"name":"Nuclear Physics B","volume":"1011 ","pages":"Article 116792"},"PeriodicalIF":2.5,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143176941","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}
Pub Date : 2025-02-01DOI: 10.1016/j.nuclphysb.2024.116788
Christopher T. Hill
We develop a dynamical, Lorentz invariant theory of composite scalars in configuration space consisting of chiral fermions, interacting by the perturbative exchange of a massive “gluon” of coupling and mass (the coloron model). The formalism is inspired by, but goes beyond, old ideas of Yukawa and the Nambu-Jona-Lasinio (NJL) model. It yields a non-pointlike internal wave-function of the bound state, , which satisfies a Schrödinger-Klein-Gordon (SKG) equation with eigenvalue . For super-critical coupling, , we have leading to spontaneous symmetry breaking. The binding of chiral fermions is semiclassical, not loop-level as in NJL. The mass scale is determined by the interaction as in NJL. We mainly focus on the short-distance, large limit, yielding an NJL pointlike interaction, but the bound state internal wave-function, , remains spatially extended and dilutes . This leads to power-law suppression of the induced Yukawa and quartic couplings and requires radically less fine-tuning of a hierarchy than does the NJL model. We include a discussion of loop corrections of the theory. A realistic top condensation model appears possible.
{"title":"A new-old approach to composite scalars with chiral fermion constituents","authors":"Christopher T. Hill","doi":"10.1016/j.nuclphysb.2024.116788","DOIUrl":"10.1016/j.nuclphysb.2024.116788","url":null,"abstract":"<div><div>We develop a dynamical, Lorentz invariant theory of composite scalars in configuration space consisting of chiral fermions, interacting by the perturbative exchange of a massive “gluon” of coupling <span><math><msub><mrow><mi>g</mi></mrow><mrow><mn>0</mn></mrow></msub></math></span> and mass <span><math><msubsup><mrow><mi>M</mi></mrow><mrow><mn>0</mn></mrow><mrow><mn>2</mn></mrow></msubsup></math></span> (the coloron model). The formalism is inspired by, but goes beyond, old ideas of Yukawa and the Nambu-Jona-Lasinio (NJL) model. It yields a non-pointlike internal wave-function of the bound state, <span><math><mi>ϕ</mi><mo>(</mo><mi>r</mi><mo>)</mo></math></span>, which satisfies a Schrödinger-Klein-Gordon (SKG) equation with eigenvalue <span><math><msup><mrow><mi>μ</mi></mrow><mrow><mn>2</mn></mrow></msup></math></span>. For super-critical coupling, <span><math><msubsup><mrow><mi>g</mi></mrow><mrow><mn>0</mn></mrow><mrow><mn>2</mn></mrow></msubsup><mo>></mo><msubsup><mrow><mi>g</mi></mrow><mrow><mn>0</mn><mi>c</mi></mrow><mrow><mn>2</mn></mrow></msubsup></math></span>, we have <span><math><msup><mrow><mi>μ</mi></mrow><mrow><mn>2</mn></mrow></msup><mo><</mo><mn>0</mn></math></span> leading to spontaneous symmetry breaking. The binding of chiral fermions is semiclassical, <em>not loop-level as in NJL</em>. The mass scale is determined by the interaction as in NJL. We mainly focus on the short-distance, large <span><math><msubsup><mrow><mi>M</mi></mrow><mrow><mn>0</mn></mrow><mrow><mn>2</mn></mrow></msubsup></math></span> limit, yielding an NJL pointlike interaction, but the bound state internal wave-function, <span><math><mi>ϕ</mi><mo>(</mo><mover><mrow><mi>r</mi></mrow><mrow><mo>→</mo></mrow></mover><mo>)</mo></math></span>, remains spatially extended and dilutes <span><math><mi>ϕ</mi><mo>(</mo><mn>0</mn><mo>)</mo></math></span>. This leads to power-law suppression of the induced Yukawa and quartic couplings and requires radically less fine-tuning of a hierarchy than does the NJL model. We include a discussion of loop corrections of the theory. A realistic top condensation model appears possible.</div></div>","PeriodicalId":54712,"journal":{"name":"Nuclear Physics B","volume":"1011 ","pages":"Article 116788"},"PeriodicalIF":2.5,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143177373","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}
Pub Date : 2025-02-01DOI: 10.1016/j.nuclphysb.2025.116804
Jesús Miguel Celestino-Ramírez, O.G. Miranda
We analyze the non-unitary effects in the linear seesaw mechanism using the current constraints and future sensitivity of the charged Lepton Flavor Violation (cLFV) processes. We perform a random scan confronting the non-unitary parameters with the limits to the cLFV processes. We show our results for the normal and inverted ordering of the oscillation data. We also discuss the equivalence of different parametrizations of the non-unitary mixing matrix and show our results in terms of the different parameterizations. We found that the stronger restrictions in the non-unitary parameter space come from rare muon decay searches.
{"title":"Charged lepton-flavor violating constraints to non-unitarity in the Linear Seesaw scheme","authors":"Jesús Miguel Celestino-Ramírez, O.G. Miranda","doi":"10.1016/j.nuclphysb.2025.116804","DOIUrl":"10.1016/j.nuclphysb.2025.116804","url":null,"abstract":"<div><div>We analyze the non-unitary effects in the linear seesaw mechanism using the current constraints and future sensitivity of the charged Lepton Flavor Violation (cLFV) processes. We perform a random scan confronting the non-unitary parameters with the limits to the cLFV processes. We show our results for the normal and inverted ordering of the oscillation data. We also discuss the equivalence of different parametrizations of the non-unitary mixing matrix and show our results in terms of the different parameterizations. We found that the stronger restrictions in the non-unitary parameter space come from rare muon decay searches.</div></div>","PeriodicalId":54712,"journal":{"name":"Nuclear Physics B","volume":"1011 ","pages":"Article 116804"},"PeriodicalIF":2.5,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143176952","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}
Pub Date : 2025-02-01DOI: 10.1016/j.nuclphysb.2025.116805
Allan John Gerrard , Kohei Motegi , Kazumitsu Sakai
We introduce and investigate a class of partition functions which is an extension of the one introduced by Foda-Manabe. We characterize the partition functions by a nested version of Izergin-Korepin analysis, and determine the explicit forms, for each of the rational, trigonometric and elliptic versions. The resulting multisymmetric functions can be regarded as extensions of the rational, trigonometric and elliptic weight functions.
{"title":"Higher rank elliptic partition functions and multisymmetric elliptic functions","authors":"Allan John Gerrard , Kohei Motegi , Kazumitsu Sakai","doi":"10.1016/j.nuclphysb.2025.116805","DOIUrl":"10.1016/j.nuclphysb.2025.116805","url":null,"abstract":"<div><div>We introduce and investigate a class of <span><math><msub><mrow><mi>gl</mi></mrow><mrow><mi>M</mi><mo>+</mo><mn>1</mn></mrow></msub></math></span> partition functions which is an extension of the one introduced by Foda-Manabe. We characterize the partition functions by a nested version of Izergin-Korepin analysis, and determine the explicit forms, for each of the rational, trigonometric and elliptic versions. The resulting multisymmetric functions can be regarded as extensions of the rational, trigonometric and elliptic weight functions.</div></div>","PeriodicalId":54712,"journal":{"name":"Nuclear Physics B","volume":"1011 ","pages":"Article 116805"},"PeriodicalIF":2.5,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143177375","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}
Pub Date : 2025-02-01DOI: 10.1016/j.nuclphysb.2024.116786
The measurement of ϒ(1S), ϒ(2S), and ϒ(3S) yields as a function of the charged-particle multiplicity density, , using the ALICE experiment at the LHC, is reported in pp collisions at 13 TeV. The ϒ meson yields are measured at forward rapidity () in the dimuon decay channel, whereas the charged-particle multiplicity is defined at central rapidity (). Both quantities are divided by their average value in minimum bias events to compute the self-normalized quantities. The increase of the self-normalized ϒ(1S), ϒ(2S), and ϒ(3S) yields is found to be compatible with a linear scaling with the self-normalized , within the uncertainties. The self-normalized yield ratios of excited-to-ground ϒ states are compatible with unity within uncertainties. Similarly, the measured double ratio of the self-normalized ϒ(1S) to the self-normalized J/ψ yields, both measured at forward rapidity, is compatible with unity for self-normalized charged-particle multiplicities beyond one. The measurements are compared with theoretical predictions incorporating initial or final state effects.
{"title":"Multiplicity dependence of ϒ production at forward rapidity in pp collisions at s=13 TeV","authors":"","doi":"10.1016/j.nuclphysb.2024.116786","DOIUrl":"10.1016/j.nuclphysb.2024.116786","url":null,"abstract":"<div><div>The measurement of ϒ(1S), ϒ(2S), and ϒ(3S) yields as a function of the charged-particle multiplicity density, <span><math><mtext>d</mtext><msub><mrow><mi>N</mi></mrow><mrow><mtext>ch</mtext></mrow></msub><mo>/</mo><mtext>d</mtext><mi>η</mi></math></span>, using the ALICE experiment at the LHC, is reported in pp collisions at <span><math><msqrt><mrow><mi>s</mi></mrow></msqrt><mo>=</mo></math></span> 13 TeV. The ϒ meson yields are measured at forward rapidity (<span><math><mn>2.5</mn><mo><</mo><mi>y</mi><mo><</mo><mn>4</mn></math></span>) in the dimuon decay channel, whereas the charged-particle multiplicity is defined at central rapidity (<span><math><mo>|</mo><mi>η</mi><mo>|</mo><mo><</mo><mn>1</mn></math></span>). Both quantities are divided by their average value in minimum bias events to compute the self-normalized quantities. The increase of the self-normalized ϒ(1S), ϒ(2S), and ϒ(3S) yields is found to be compatible with a linear scaling with the self-normalized <span><math><mtext>d</mtext><msub><mrow><mi>N</mi></mrow><mrow><mtext>ch</mtext></mrow></msub><mo>/</mo><mtext>d</mtext><mi>η</mi></math></span>, within the uncertainties. The self-normalized yield ratios of excited-to-ground ϒ states are compatible with unity within uncertainties. Similarly, the measured double ratio of the self-normalized ϒ(1S) to the self-normalized J/<em>ψ</em> yields, both measured at forward rapidity, is compatible with unity for self-normalized charged-particle multiplicities beyond one. The measurements are compared with theoretical predictions incorporating initial or final state effects.</div></div>","PeriodicalId":54712,"journal":{"name":"Nuclear Physics B","volume":"1011 ","pages":"Article 116786"},"PeriodicalIF":2.5,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143178293","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}
Pub Date : 2025-02-01DOI: 10.1016/j.nuclphysb.2025.116799
Fayez Abu-Ajamieh , Pratik Chattopadhyay , Marco Frasca
We study some phenomenological aspects of Lee-Wick (LW) QED. In particular, we show that LW QED implies charge dequantization and a flavor-dependent LW scale. We study the implications of the Weak Gravity Conjecture (WGC) in LW QED and calculate the modified electric force and potential and use the former to reformulate the WGC in LW QED. We also calculate the photon self-energy and the Uehling potential in LW QED. We show that bounds on milli-charged particles from matter neutrality experiments set stringent limits on the LW scale of fermions and of the photon.
{"title":"Phenomenological aspects of Lee-Wick QED","authors":"Fayez Abu-Ajamieh , Pratik Chattopadhyay , Marco Frasca","doi":"10.1016/j.nuclphysb.2025.116799","DOIUrl":"10.1016/j.nuclphysb.2025.116799","url":null,"abstract":"<div><div>We study some phenomenological aspects of Lee-Wick (LW) QED. In particular, we show that LW QED implies charge dequantization and a flavor-dependent LW scale. We study the implications of the Weak Gravity Conjecture (WGC) in LW QED and calculate the modified electric force and potential and use the former to reformulate the WGC in LW QED. We also calculate the photon self-energy and the Uehling potential in LW QED. We show that bounds on milli-charged particles from matter neutrality experiments set stringent limits on the LW scale of fermions and of the photon.</div></div>","PeriodicalId":54712,"journal":{"name":"Nuclear Physics B","volume":"1011 ","pages":"Article 116799"},"PeriodicalIF":2.5,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143176953","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}
扫码关注我们
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号