International Journal of Modern Physics a最新文献_第3页

Gauge coupling unification in a minimal non-supersymmetric E6 GUT 最小非超对称 E6 GUT 中的量子耦合统一

IF 1.6 4区物理与天体物理

International Journal of Modern Physics a Pub Date : 2024-03-16 DOI: 10.1142/s0217751x24500180

Chandini Dash, Snigdha Mishra, Sudhanwa Patra, Purushottam Sahu

{"title":"Gauge coupling unification in a minimal non-supersymmetric E6 GUT","authors":"Chandini Dash, Snigdha Mishra, Sudhanwa Patra, Purushottam Sahu","doi":"10.1142/s0217751x24500180","DOIUrl":"https://doi.org/10.1142/s0217751x24500180","url":null,"abstract":"We consider a minimal renormalizable non-supersymmetric <math altimg=\"eq-00002.gif\" display=\"inline\" overflow=\"scroll\"><msub><mrow><mi>E</mi></mrow><mrow><mn>6</mn></mrow></msub></math> Grand Unified Theory using fundamental representation 27 for fermions and scalars. The scalar with adjoint representation 78 is also taken for direct breaking of <math altimg=\"eq-00003.gif\" display=\"inline\" overflow=\"scroll\"><msub><mrow><mi>E</mi></mrow><mrow><mn>6</mn></mrow></msub></math> to SM. The proposed model, guided by TeV-scale vector-like fermions and scalar leptoquark, offers successful gauge unification even in the absence of any intermediate symmetry. Embedded with threshold corrections, it is shown to be compatible with the present experimental limit on proton decay lifetime. The unique feature of the model shows that the GUT threshold corrections to the unification mass is controlled by superheavy gauge bosons only, thereby minimizing the uncertainty of the GUT predictions. The scalar leptoquark and vector-like fermions residing in 27 representation can explain flavor physics anomalies like <math altimg=\"eq-00004.gif\" display=\"inline\" overflow=\"scroll\"><msub><mrow><mi>R</mi></mrow><mrow><msup><mrow><mi>D</mi></mrow><mrow><mo stretchy=\"false\">(</mo><mo>∗</mo><mo stretchy=\"false\">)</mo></mrow></msup></mrow></msub></math> as reported by the LHCb collaboration and the muon anomalous magnetic moment reported by the recent muon <math altimg=\"eq-00005.gif\" display=\"inline\" overflow=\"scroll\"><mi>g</mi><mo>−</mo><mn>2</mn></math> experiment at Fermilab. The model can also predict a sub-eV scale neutrino at one-loop level via exchange of W and Z gauge bosons through MRIS mechanism.","PeriodicalId":50309,"journal":{"name":"International Journal of Modern Physics a","volume":"69 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140151508","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}

引用次数: 0

On the fractional quark–antiquark confinement and symplectic quantum mechanics 关于分数夸克-反夸克约束和交映量子力学

IF 1.6 4区物理与天体物理

International Journal of Modern Physics a Pub Date : 2024-03-12 DOI: 10.1142/s0217751x24500118

M. Abu-Shady, R. R. Luz, G. X. A. Petronilo, A. E. Santana, R. G. G. Amorim

{"title":"On the fractional quark–antiquark confinement and symplectic quantum mechanics","authors":"M. Abu-Shady, R. R. Luz, G. X. A. Petronilo, A. E. Santana, R. G. G. Amorim","doi":"10.1142/s0217751x24500118","DOIUrl":"https://doi.org/10.1142/s0217751x24500118","url":null,"abstract":"Using the formalism of generalized fractional derivatives, a two-dimensional nonrelativistic meson system is studied. The mesons are interacting by a Cornell potential. The system is formulated in the domain of the symplectic quantum mechanics by means of the generalized fractional Nikiforov–Uvarov method. The corresponding Wigner function and the energy eigenvalues are then derived. The effect of fractional parameters <math altimg=\"eq-00001.gif\" display=\"inline\" overflow=\"scroll\"><mi>α</mi></math> and <math altimg=\"eq-00002.gif\" display=\"inline\" overflow=\"scroll\"><mi>β</mi></math> with the ground state solution is analyzed through the Wigner function for the charm–anticharm, bottom–antibottom and <math altimg=\"eq-00003.gif\" display=\"inline\" overflow=\"scroll\"><mi>b</mi><mover accent=\"true\"><mrow><mi>c</mi></mrow><mo accent=\"true\">¯</mo></mover></math> mesons. One of the fundamental achievements of such Cornell model is the determination of heavy quarkonia mass spectra. We have computed these masses and the present results are in agreement with the experimental data, improving previous theoretical results.","PeriodicalId":50309,"journal":{"name":"International Journal of Modern Physics a","volume":"73 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140106119","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}

引用次数: 0

On the Axion Electrodynamics in a two-dimensional slab and the Casimir effect 关于二维板中的轴心电动力学和卡西米尔效应

IF 1.6 4区物理与天体物理

International Journal of Modern Physics a Pub Date : 2024-03-12 DOI: 10.1142/s0217751x24500040

Iver H. Brevik, Moshe M. Chaichian, Amedeo M. Favitta

引用次数: 0

Cosmological constant as quantum error correction from generalized gauge invariance in double field theory 宇宙常数作为双场理论中广义规整不变性的量子误差修正

IF 1.6 4区物理与天体物理

International Journal of Modern Physics a Pub Date : 2024-03-09 DOI: 10.1142/s0217751x24500155

Andrei T. Patrascu

{"title":"Cosmological constant as quantum error correction from generalized gauge invariance in double field theory","authors":"Andrei T. Patrascu","doi":"10.1142/s0217751x24500155","DOIUrl":"https://doi.org/10.1142/s0217751x24500155","url":null,"abstract":"The holographic principle and its realization as the anti-de Sitter/conformal field theory (AdS/CFT) correspondence leads to the existence of the so-called precursor operators. These are boundary operators that carry nonlocal information regarding events occurring deep inside the bulk and which cannot be causally connected to the boundary. Such nonlocal operators can distinguish nonvacuum-like excitations within the bulk that cannot be observed by any local gauge invariant operators in the boundary. The boundary precursors are expected to become increasingly nonlocal the further the bulk process is from the boundary. Such phenomena are expected to be related to the extended nature of the strings. Standard gauge invariance in the boundary theory equates to quantum error correction which furthermore establishes localization of bulk information. I show that when double field theory quantum error correction prescriptions are considered in the bulk, gauge invariance in the boundary manifests residual effects associated to stringy winding modes. Also, an effect of double field theory quantum error correction is the appearance of positive cosmological constant. The emergence of space–time from the entanglement structure of a dual quantum field theory appears in this context to generalize for de Sitter space–times as well.","PeriodicalId":50309,"journal":{"name":"International Journal of Modern Physics a","volume":"308 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140108173","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}

引用次数: 0

Application of quantum machine learning in a Higgs physics study at the CEPC 量子机器学习在 CEPC 希格斯物理学研究中的应用

IF 1.6 4区物理与天体物理

International Journal of Modern Physics a Pub Date : 2024-03-07 DOI: 10.1142/s0217751x24500076

Abdualazem Fadol, Qiyu Sha, Yaquan Fang, Zhan Li, Sitian Qian, Yuyang Xiao, Yu Zhang, Chen Zhou

{"title":"Application of quantum machine learning in a Higgs physics study at the CEPC","authors":"Abdualazem Fadol, Qiyu Sha, Yaquan Fang, Zhan Li, Sitian Qian, Yuyang Xiao, Yu Zhang, Chen Zhou","doi":"10.1142/s0217751x24500076","DOIUrl":"https://doi.org/10.1142/s0217751x24500076","url":null,"abstract":"Machine learning has blossomed in recent decades and has become essential in many fields. It significantly solved some problems in particle physics — particle reconstruction, event classification, etc. However, it is now time to break the limitation of conventional machine learning with quantum computing. A support-vector machine algorithm with a quantum kernel estimator (QSVM-Kernel) leverages high-dimensional quantum state space to identify a signal from backgrounds. In this study, we have pioneered employing this quantum machine learning algorithm to study the <math altimg=\"eq-00001.gif\" display=\"inline\" overflow=\"scroll\"><msup><mrow><mi>e</mi></mrow><mrow><mo>+</mo></mrow></msup><msup><mrow><mi>e</mi></mrow><mrow><mo>−</mo></mrow></msup><mo>→</mo><mi>Z</mi><mi>H</mi></math> process at the Circular Electron–Positron Collider (CEPC), a proposed Higgs factory to study electroweak symmetry breaking of particle physics. Using 6 qubits on quantum computer simulators, we optimized the QSVM-Kernel algorithm and obtained a classification performance similar to the classical support-vector machine algorithm. Furthermore, we have validated the QSVM-Kernel algorithm using 6-qubits on quantum computer hardware from both IBM and Origin Quantum: the classification performances of both are approaching noiseless quantum computer simulators. In addition, the Origin Quantum hardware results are similar to the IBM Quantum hardware within the uncertainties in our study. Our study shows that state-of-the-art quantum computing technologies could be utilized by particle physics, a branch of fundamental science that relies on big experimental data.","PeriodicalId":50309,"journal":{"name":"International Journal of Modern Physics a","volume":"277 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140044625","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}

引用次数: 0

Top-quark pair production by electron–positron scattering in a linearly polarized laser field 在线性偏振激光场中通过电子-正电子散射产生顶夸克对

IF 1.6 4区物理与天体物理

International Journal of Modern Physics a Pub Date : 2024-03-07 DOI: 10.1142/s0217751x23501877

R. Chahri, S. Mouslih, M. Jakha, B. Manaut, S. Taj

引用次数: 0

Describing the thermal radiation in Au+Au collisions at sNN=200 GeV by an analytic solution of relativistic hydrodynamics 用相对论流体力学的解析解描述 sNN=200 GeV 的 Au+Au 碰撞中的热辐射

IF 1.6 4区物理与天体物理

International Journal of Modern Physics a Pub Date : 2024-03-06 DOI: 10.1142/s0217751x24500064

Gábor Kasza

{"title":"Describing the thermal radiation in Au+Au collisions at sNN=200 GeV by an analytic solution of relativistic hydrodynamics","authors":"Gábor Kasza","doi":"10.1142/s0217751x24500064","DOIUrl":"https://doi.org/10.1142/s0217751x24500064","url":null,"abstract":"In high-energy heavy-ion collisions, a nearly perfect fluid, the so-called strongly coupled quark–gluon plasma (QGP), forms. After the short period of thermalization, the evolution of this medium can be described by the laws of relativistic hydrodynamics. The time evolution of the QGP can be understood through direct photon spectra measurements, which are sensitive to the entire period between the thermalization and the freeze-out of the medium. I present a new analytic formula that describes the thermal photon radiation and it is derived from an exact and finite solution of relativistic hydrodynamics with accelerating velocity field. Then I compare my calculations to the most recent nonprompt spectrum of direct photons for <math altimg=\"eq-00003.gif\" display=\"inline\" overflow=\"scroll\"><mstyle><mtext mathvariant=\"normal\">Au</mtext></mstyle><mo>+</mo><mstyle><mtext mathvariant=\"normal\">Au</mtext></mstyle></math> at <math altimg=\"eq-00004.gif\" display=\"inline\" overflow=\"scroll\"><msqrt><mrow><msub><mrow><mi>s</mi></mrow><mrow><mi>N</mi><mi>N</mi></mrow></msub></mrow></msqrt><mo>=</mo><mn>2</mn><mn>0</mn><mn>0</mn></math><math altimg=\"eq-00005.gif\" display=\"inline\" overflow=\"scroll\"><mspace width=\".17em\"></mspace></math>GeV collisions. I have found a convincing agreement between the model and the data, which allows to give an estimate of the initial temperature in the center of the fireball. My results predict hydrodynamic scaling behavior for the thermal photon spectra of high-energy heavy-ion collisions.","PeriodicalId":50309,"journal":{"name":"International Journal of Modern Physics a","volume":"194 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140044752","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}

引用次数: 0

The phase transition of nonminimal Yang–Mills AdS black brane 非极小杨-米尔斯 AdS 黑球的相变

IF 1.6 4区物理与天体物理

International Journal of Modern Physics a Pub Date : 2024-03-06 DOI: 10.1142/s0217751x24500106

Mehdi Sadeghi, Faramaz Rahmani

{"title":"The phase transition of nonminimal Yang–Mills AdS black brane","authors":"Mehdi Sadeghi, Faramaz Rahmani","doi":"10.1142/s0217751x24500106","DOIUrl":"https://doi.org/10.1142/s0217751x24500106","url":null,"abstract":"In this paper, we shall study the phase transition of nonminimal coupling of Einstein–Hilbert gravity and electric field of Yang–Mills type in AdS space–time. We couple the Ricci scalar to the Yang–Mills invariant to obtain a modified theory of gravity. A black brane solution is introduced up to the first order of the term <math altimg=\"eq-00001.gif\" display=\"inline\" overflow=\"scroll\"><mi>R</mi><msubsup><mrow><mi>F</mi></mrow><mrow><mi>μ</mi><mi>α</mi></mrow><mrow><mo stretchy=\"false\">(</mo><mi>a</mi><mo stretchy=\"false\">)</mo></mrow></msubsup><msup><mrow><mi>F</mi></mrow><mrow><mo stretchy=\"false\">(</mo><mi>a</mi><mo stretchy=\"false\">)</mo><mi>μ</mi><mi>α</mi></mrow></msup></math> in this model. Then, the phase transition of this solution will be investigated in canonical ensemble. Our investigation shows that only the second-order phase transition behavior is seen in this model. Also, due to the coupling of the Yang–Mills field and Ricci scalar, there are differences with the phase transitions of the usual minimal models. We shall show that in the absence of nonminimal coupling there is not any phase transition.","PeriodicalId":50309,"journal":{"name":"International Journal of Modern Physics a","volume":"271 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140045107","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}

引用次数: 0

Canonical description of the tachyon kink in general background and Hamiltonian for Dp-brane-anti-Dp-brane system 一般背景下超速子扭结的典型描述和 Dp-带-反 Dp-带系统的哈密顿方程

IF 1.6 4区物理与天体物理

International Journal of Modern Physics a Pub Date : 2024-02-17 DOI: 10.1142/s0217751x24500039

J. Klusoň

引用次数: 0

Singlet scalar dark matter in the noncommutative space–time: A viable hypothesis to explain the gamma-ray excess in the galactic center 非交换时空中的单子标量暗物质：解释银河中心伽马射线过量的可行假说

IF 1.6 4区物理与天体物理

International Journal of Modern Physics a Pub Date : 2024-02-16 DOI: 10.1142/s0217751x23501907

Zahra Rezaei, S. Peyman Zakeri

引用次数: 0