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Foreword: particle physics post Glashow Weinberg Salam (GWS) model 前言:粒子物理后Glashow Weinberg Salam (GWS)模型
IF 2 4区 物理与天体物理
Indian Journal of Physics Pub Date : 2023-08-19 DOI: 10.1007/s12648-023-02861-2
Dilip Kumar Ghosh, Sourov Roy
{"title":"Foreword: particle physics post Glashow Weinberg Salam (GWS) model","authors":"Dilip Kumar Ghosh,&nbsp;Sourov Roy","doi":"10.1007/s12648-023-02861-2","DOIUrl":"10.1007/s12648-023-02861-2","url":null,"abstract":"<div><p>In this special edition, we overview the progress and present status of the Glashow-Weinberg-Salam (GWS) theory, widely recognized as the Standard Model (SM) of particle physics, followed by critical reviews of several scenarios that go beyond the SM.</p></div>","PeriodicalId":584,"journal":{"name":"Indian Journal of Physics","volume":"97 11","pages":"3167 - 3169"},"PeriodicalIF":2.0,"publicationDate":"2023-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4743314","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
Effect of free surface boundary condition on reflected waves in a half-space piezoelectric semiconductor medium 半空间压电半导体介质中自由表面边界条件对反射波的影响
IF 2 4区 物理与天体物理
Indian Journal of Physics Pub Date : 2023-08-10 DOI: 10.1007/s12648-023-02697-w
Adnan Jahangir, Ashraf M. Zenkour, Ayesha Kaynat
{"title":"Effect of free surface boundary condition on reflected waves in a half-space piezoelectric semiconductor medium","authors":"Adnan Jahangir,&nbsp;Ashraf M. Zenkour,&nbsp;Ayesha Kaynat","doi":"10.1007/s12648-023-02697-w","DOIUrl":"10.1007/s12648-023-02697-w","url":null,"abstract":"<div><p>The article deals with the response of incident elastic waves striking the interface of the piezoelectric half-space medium. The medium selected is elastic with transversely isotropic properties. The dispersion relation for free surface boundary conditions is obtained by using an analytical technique of time-harmonic wave solution. The theoretical results indicate that the incident wave results in the generation of four reflected waves including the thermal wave. A thermal disturbance that travels through the selected medium is encountered by the concept of the classical theory of thermoelasticity. The theoretical analysis done is represented graphically for a particular medium ZnO. Validations of the computed results have been justified by the conservation of energy flux.</p></div>","PeriodicalId":584,"journal":{"name":"Indian Journal of Physics","volume":"97 12","pages":"3523 - 3530"},"PeriodicalIF":2.0,"publicationDate":"2023-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s12648-023-02697-w.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41081290","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}
引用次数: 0
Supersymmetry: a decade after Higgs discovery 超对称:希格斯粒子发现十年后
IF 2 4区 物理与天体物理
Indian Journal of Physics Pub Date : 2023-07-08 DOI: 10.1007/s12648-023-02812-x
V. Suryanarayana Mummidi, Priyanka Lamba, Sudhir K. Vempati
{"title":"Supersymmetry: a decade after Higgs discovery","authors":"V. Suryanarayana Mummidi,&nbsp;Priyanka Lamba,&nbsp;Sudhir K. Vempati","doi":"10.1007/s12648-023-02812-x","DOIUrl":"10.1007/s12648-023-02812-x","url":null,"abstract":"<div><p>Supersymmetric extensions of the Standard Model have been in vogue for over half a century. They have many interesting theoretical properties like calculability, absence of quadratic divergences, and phenomenologically impactful features like gauge coupling unification, dark matter candidates, signatures at present and future colliders, etc. A defining feature of these models is the calculability of Higgs mass in terms of a few parameters. The discovery of a Higgs particle with a mass of around 125 GeV thus has significant implications. The null results for the searches of superpartners at LHC have also put further constraints. Taken together with direct detection limits on weakly interacting massive particle dark matter, it appears that TeV scale supersymmetry is not realized in Nature, and the theoretical expectations have reached a turning point. The present onslaught from the experiments suggests that supersymmetric models need a more complex particle structure, Lagrangian and breaking patterns to be a natural solution to the hierarchy problem. We review existing models and discuss their feasibility in the current and future experimental programs.</p></div>","PeriodicalId":584,"journal":{"name":"Indian Journal of Physics","volume":"97 11","pages":"3315 - 3326"},"PeriodicalIF":2.0,"publicationDate":"2023-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s12648-023-02812-x.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4342487","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}
引用次数: 0
Electro-static properties of GaAs based two-dimensional bilayer systems 基于砷化镓的二维双层体系的静电特性
IF 2 4区 物理与天体物理
Indian Journal of Physics Pub Date : 2023-07-08 DOI: 10.1007/s12648-023-02816-7
Deniz Eksi
{"title":"Electro-static properties of GaAs based two-dimensional bilayer systems","authors":"Deniz Eksi","doi":"10.1007/s12648-023-02816-7","DOIUrl":"10.1007/s12648-023-02816-7","url":null,"abstract":"<div><p>This work investigates electro-static potential and electron density distributions of a bilayer system. In calculations, a self-consistent numerical method is used to solve the three-dimensional Poisson equation. Firstly, an experimental heterostructure is defined to generate the wafer configuration. Secondly, the distance between the two electron gas layers was varied. It is observed that at the tunneling limit of separation (<span>(sim )</span> nm), the spatial distribution of electrons is significantly different. Following step, the effects of the metallic gate defined on the heterostructure and the potential vary applied to this metallic gate on the spatial distribution of electrons were investigated.The calculations represent that the bottom layer is unaffected for the voltage values applied to the metallic gate. At a particular gate voltage value, the top layer is completely depleted. In the locally depleted electron regions in the top layer, the electrons in the corresponding regions in the bottom layer are affected by the gate potential. This study provides significant results and therefore will be leading for current and future studies.</p></div>","PeriodicalId":584,"journal":{"name":"Indian Journal of Physics","volume":"97 10","pages":"2971 - 2975"},"PeriodicalIF":2.0,"publicationDate":"2023-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4346015","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
Glimpses of extra dimension models 额外维度模型的一瞥
IF 2 4区 物理与天体物理
Indian Journal of Physics Pub Date : 2023-07-03 DOI: 10.1007/s12648-023-02780-2
Anindya Datta, Avirup Shaw
{"title":"Glimpses of extra dimension models","authors":"Anindya Datta,&nbsp;Avirup Shaw","doi":"10.1007/s12648-023-02780-2","DOIUrl":"10.1007/s12648-023-02780-2","url":null,"abstract":"<div><p>In this short review, we discuss the salient features of the model and phenomenology of Large, Warped and Universal extra dimensional models. Models of large and warped extra dimension primarily intended to connect two apparently uncorrelated energy scales, namely the electroweak and Planck scale. While the main motivation for Universal Extra Dimension model was to provide a viable candidate for relic particle. Null results from the searches at the LHC for the signal of extra-dimensional models have pushed the lower limits of Kaluza Klein excitation of gravitons/Standard Model particles in the ballpark of few TeV.</p></div>","PeriodicalId":584,"journal":{"name":"Indian Journal of Physics","volume":"97 11","pages":"3351 - 3365"},"PeriodicalIF":2.0,"publicationDate":"2023-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s12648-023-02780-2.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4471575","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}
引用次数: 0
Platinum nitride Pt4N compound: first principles investigations 铂氮化Pt4N化合物:第一性原理研究
IF 2 4区 物理与天体物理
Indian Journal of Physics Pub Date : 2023-07-03 DOI: 10.1007/s12648-023-02634-x
N. Bellahcene, A. Dahani, M. Djermouni, K. Dine, A. Cherifi, A. Zaoui
{"title":"Platinum nitride Pt4N compound: first principles investigations","authors":"N. Bellahcene,&nbsp;A. Dahani,&nbsp;M. Djermouni,&nbsp;K. Dine,&nbsp;A. Cherifi,&nbsp;A. Zaoui","doi":"10.1007/s12648-023-02634-x","DOIUrl":"10.1007/s12648-023-02634-x","url":null,"abstract":"<div><p>This paper highlights the application of first principle calculations based on density functional theory calculations to study platinum nitride properties of the formula Pt<sub>4</sub>N. It is well known that technological properties of surface layers may be significantly modified by the use of nitrides. In fact, the structural and thermodynamical stabilities of Pt<sub>4</sub>N compound have been established first and the elastic and electronic properties have been investigated second. Between seven crystallographic phases studied, the cubic structure with space group P43m (No. 215) was found to be the most structurally and thermodynamically stable one. The structural parameters, bulk moduli and their first pressure derivatives were determined for all studied structures. Practically, all the studied phases were found to be nonmagnetic; this is due to the fact that the platinum compound is non-magnetic. For the ground-state of Pt<sub>4</sub>N-structure, all crystalline elastic constants (in the equilibrium and under hydrostatic pressure), the Young moduli, as well as homogenized polycrystalline elastic moduli (obtained by different homogenization methods) were predicted. The ground-state structure of the Pt<sub>4</sub>N compound is found mechanically stable and considered to be ductile.</p></div>","PeriodicalId":584,"journal":{"name":"Indian Journal of Physics","volume":"97 10","pages":"2917 - 2926"},"PeriodicalIF":2.0,"publicationDate":"2023-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s12648-023-02634-x.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4124271","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}
引用次数: 0
Dark matter 暗物质
IF 2 4区 物理与天体物理
Indian Journal of Physics Pub Date : 2023-05-31 DOI: 10.1007/s12648-023-02592-4
Bhaskar Dutta
{"title":"Dark matter","authors":"Bhaskar Dutta","doi":"10.1007/s12648-023-02592-4","DOIUrl":"10.1007/s12648-023-02592-4","url":null,"abstract":"<div><p>The origin of dark matter (DM) which forms 27% of the Universe is still a puzzle. Though the existence of DM has been realized in various astronomical observations via gravitational interactions, DM has not been observed yet in any particle physics experiments, e.g., collider, direct and indirect detection of DM, etc. In this review, we discuss the thermal and non-thermal origin of DM in the context of particle physics models. We discuss the constraints on DM from the ongoing collider and direct and indirect detection experiments. We discuss the possibility to use the sub-GeV mass for DM where the origin of this type of DM can be either thermal or non-thermal. The ongoing beam-dump-based neutrino experiments seem to be providing interesting avenues to detect them.</p></div>","PeriodicalId":584,"journal":{"name":"Indian Journal of Physics","volume":"97 11","pages":"3269 - 3285"},"PeriodicalIF":2.0,"publicationDate":"2023-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s12648-023-02592-4.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"5189759","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}
引用次数: 0
Rotational curves decomposition of spiral galaxies using least square non-linear regression 螺旋星系旋转曲线的最小二乘非线性回归分解
IF 2 4区 物理与天体物理
Indian Journal of Physics Pub Date : 2023-05-25 DOI: 10.1007/s12648-023-02655-6
Prateek Boga, Adhitya Shreyas Sripennem, Amaria Navis Bonsi
{"title":"Rotational curves decomposition of spiral galaxies using least square non-linear regression","authors":"Prateek Boga,&nbsp;Adhitya Shreyas Sripennem,&nbsp;Amaria Navis Bonsi","doi":"10.1007/s12648-023-02655-6","DOIUrl":"10.1007/s12648-023-02655-6","url":null,"abstract":"<div><p>Dark Matter mass distribution is studied in a Cold Dark Matter Universe using Navarro–Frenk–White density profile for Dark Matter (DM) in spiral galaxies. An equation for a complete rotation curve (RC) is obtained by combining the individual RC equations for the bulge, disk and DM halo. The equation is further used for fitting and decomposition of the RCs of 34 spiral galaxies using a Least Square non-linear algorithm in MATLAB. The free parameters’ values are recorded, <span>(chi ^2)</span> values and masses of each component are calculated. 32 of 34 galaxies yield a <span>(chi ^2)</span> value between 1 and 2 validating the algorithm for the purpose of RC decomposition and the exceptions are discussed. We also present the rotational velocity dataset for the bulge, disk and DM halo for all galaxies (https://adhitya-spas.github.io/Database/).</p></div>","PeriodicalId":584,"journal":{"name":"Indian Journal of Physics","volume":"97 9","pages":"2577 - 2590"},"PeriodicalIF":2.0,"publicationDate":"2023-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4979558","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 Higgs Boson and its physics: an overview 希格斯玻色子及其物理学:概述
IF 2 4区 物理与天体物理
Indian Journal of Physics Pub Date : 2023-05-24 DOI: 10.1007/s12648-023-02718-8
Sreerup Raychaudhuri
{"title":"The Higgs Boson and its physics: an overview","authors":"Sreerup Raychaudhuri","doi":"10.1007/s12648-023-02718-8","DOIUrl":"10.1007/s12648-023-02718-8","url":null,"abstract":"<div><p>The Higgs boson plays a central role in the Standard Model, as well as in theories which go beyond it. This article is therefore divided into two parts. The first takes s historical approach and shows how the mass problem entered weak interaction theory from the beginning and how it was solved by invoking the Higgs boson. This is followed by a construction of the Glashow–Salam–Weinberg model, again stressing the role played by the Higgs doublet. This part culminates in the Higgs boson discovery of 2012. The second part first discusses the shortcomings of the Standard Model and then touches upon the major theories which try to improve upon it, mostly with profound consequences on the Higgs sector. This is followed up by short descriptions of a number of popular extensions of the Higgs sector, and culminates in a brief introduction to effective field theory approaches to studying the Higgs sector.</p></div>","PeriodicalId":584,"journal":{"name":"Indian Journal of Physics","volume":"97 11","pages":"3189 - 3224"},"PeriodicalIF":2.0,"publicationDate":"2023-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4948983","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
Comparison of finite element density functional with NWChem results for 18 molecules 18个分子有限元密度泛函与NWChem结果的比较
IF 2 4区 物理与天体物理
Indian Journal of Physics Pub Date : 2023-05-19 DOI: 10.1007/s12648-023-02663-6
Moritz Braun, Kingsley Onyebuchi Obodo
{"title":"Comparison of finite element density functional with NWChem results for 18 molecules","authors":"Moritz Braun,&nbsp;Kingsley Onyebuchi Obodo","doi":"10.1007/s12648-023-02663-6","DOIUrl":"10.1007/s12648-023-02663-6","url":null,"abstract":"<div><p>Making use of the code presented in the previous work by Braun et al. (Eur Phys J B 92:230, 2019), finite element density functional calculations have been performed in Cartesian coordinates using the density functional approach for 18 mostly organic molecules, which are acetic acid, ammonia, benzene, butane, carbon-dioxide, ethane, ethanol, fluorine gas, iso-butane, methane, methanol, nitrogen gas, pentane, propane, urea, and water. The resulting total energies and densities were compared with those obtained using the Gaussian basis set package NWChem (Valiev et al. in Comput Phys Commun 181:1477, 2010) for a number of basis sets. We found very good agreement for the total energies and densities of the considered molecules using the two different approaches. This further highlights the success and usefulness of the finite element approach.</p></div>","PeriodicalId":584,"journal":{"name":"Indian Journal of Physics","volume":"97 10","pages":"2899 - 2902"},"PeriodicalIF":2.0,"publicationDate":"2023-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s12648-023-02663-6.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4762812","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}
引用次数: 0
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