Advances in High Energy Physics最新文献

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Current-Component Independent Transition Form Factors for Semileptonic and Rare D ⟶ π K Decays in the Light-Front Quark Model 光前夸克模型中半光子和稀有D π K衰变的电流分量独立跃迁形式因子
IF 1.7 4区 物理与天体物理
Advances in High Energy Physics Pub Date : 2021-08-24 DOI: 10.1155/2021/4277321
H. Choi
{"title":"Current-Component Independent Transition Form Factors for Semileptonic and Rare \u0000 D\u0000 ⟶\u0000 π\u0000 \u0000 \u0000 K\u0000 \u0000 \u0000 Decays in the Light-Front Quark Model","authors":"H. Choi","doi":"10.1155/2021/4277321","DOIUrl":"https://doi.org/10.1155/2021/4277321","url":null,"abstract":"<jats:p>We investigate the exclusive semileptonic and rare <jats:inline-formula>\u0000 <math xmlns=\"http://www.w3.org/1998/Math/MathML\" id=\"M2\">\u0000 <mi>D</mi>\u0000 <mo>⟶</mo>\u0000 <mi>π</mi>\u0000 <mfenced open=\"(\" close=\")\">\u0000 <mrow>\u0000 <mi>K</mi>\u0000 </mrow>\u0000 </mfenced>\u0000 </math>\u0000 </jats:inline-formula> decays within the standard model together with the light-front quark model (LFQM) constrained by the variational principle for the QCD-motivated effective Hamiltonian. The form factors are obtained in the <jats:inline-formula>\u0000 <math xmlns=\"http://www.w3.org/1998/Math/MathML\" id=\"M3\">\u0000 <msup>\u0000 <mrow>\u0000 <mi>q</mi>\u0000 </mrow>\u0000 <mrow>\u0000 <mo>+</mo>\u0000 </mrow>\u0000 </msup>\u0000 <mo>=</mo>\u0000 <mn>0</mn>\u0000 </math>\u0000 </jats:inline-formula> frame and then analytically continue to the physical timelike region. Together with our recent analysis of the current-component independent form factors <jats:inline-formula>\u0000 <math xmlns=\"http://www.w3.org/1998/Math/MathML\" id=\"M4\">\u0000 <msub>\u0000 <mrow>\u0000 <mi>f</mi>\u0000 </mrow>\u0000 <mrow>\u0000 <mo>±</mo>\u0000 </mrow>\u0000 </msub>\u0000 <mfenced open=\"(\" close=\")\">\u0000 <mrow>\u0000 <msup>\u0000 <mrow>\u0000 <mi>q</mi>\u0000 </mrow>\u0000 <mrow>\u0000 <mn>2</mn>\u0000 </mrow>\u0000 </msup>\u0000 </mrow>\u0000 </mfenced>\u0000 </math>\u0000 </jats:inline-formula> for the semileptonic decays, we present the current-component independent tensor form factor <jats:inline-formula>\u0000 <math xmlns=\"http://www.w3.org/1998/Math/MathML\" id=\"M5\">\u0000 <msub>\u0000 <mrow>\u0000 <mi>f</mi>\u0000 </mrow>\u0000 <mrow>\u0000 <mi>T</mi>\u0000 </mrow>\u0000 </msub>\u0000 <mfenced open=\"(\" close=\")\">\u0000 <mrow>\u0000 <msup>\u0000 <mrow>\u0000 ","PeriodicalId":7498,"journal":{"name":"Advances in High Energy Physics","volume":" ","pages":""},"PeriodicalIF":1.7,"publicationDate":"2021-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42769980","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: 5
Event-by-Event Particle Ratio Fluctuations at LHC Energies 大型强子对撞机能量下的事件-事件粒子比波动
IF 1.7 4区 物理与天体物理
Advances in High Energy Physics Pub Date : 2021-08-11 DOI: 10.1155/2021/6663846
Shaista Khan, B. Ali, A. Chandra, S. Ahmad
{"title":"Event-by-Event Particle Ratio Fluctuations at LHC Energies","authors":"Shaista Khan, B. Ali, A. Chandra, S. Ahmad","doi":"10.1155/2021/6663846","DOIUrl":"https://doi.org/10.1155/2021/6663846","url":null,"abstract":"<jats:p>A Monte Carlo study of identified particle ratio fluctuations at LHC energies is carried out in the framework of HIJING model using the fluctuation variable <jats:inline-formula>\u0000 <math xmlns=\"http://www.w3.org/1998/Math/MathML\" id=\"M1\">\u0000 <msub>\u0000 <mrow>\u0000 <mi>ν</mi>\u0000 </mrow>\u0000 <mrow>\u0000 <mtext>dyn</mtext>\u0000 </mrow>\u0000 </msub>\u0000 </math>\u0000 </jats:inline-formula>. The simulated events for Pb-Pb collisions at <jats:inline-formula>\u0000 <math xmlns=\"http://www.w3.org/1998/Math/MathML\" id=\"M2\">\u0000 <msub>\u0000 <mrow>\u0000 <msqrt>\u0000 <mrow>\u0000 <mi>s</mi>\u0000 </mrow>\u0000 </msqrt>\u0000 </mrow>\u0000 <mrow>\u0000 <mi>N</mi>\u0000 <mi>N</mi>\u0000 </mrow>\u0000 </msub>\u0000 <mo>=</mo>\u0000 <mn>2.76</mn>\u0000 </math>\u0000 </jats:inline-formula> and 5.02 TeV and Xe-Xe collisions at <jats:inline-formula>\u0000 <math xmlns=\"http://www.w3.org/1998/Math/MathML\" id=\"M3\">\u0000 <msub>\u0000 <mrow>\u0000 <msqrt>\u0000 <mrow>\u0000 <mi>s</mi>\u0000 </mrow>\u0000 </msqrt>\u0000 </mrow>\u0000 <mrow>\u0000 <mi>N</mi>\u0000 <mi>N</mi>\u0000 </mrow>\u0000 </msub>\u0000 <mo>=</mo>\u0000 <mn>5.44</mn>\u0000 <mtext> </mtext>\u0000 <mtext>TeV</mtext>\u0000 </math>\u0000 </jats:inline-formula> are analyzed. From this study, it is observed that the values of <jats:inline-formula>\u0000 <math xmlns=\"http://www.w3.org/1998/Math/MathML\" id=\"M4\">\u0000 <mfenced open=\"[\" close=\"]\">\u0000 <mrow>\u0000 <mi>π</mi>\u0000 <mo>,</mo>\u0000 <mi>K</mi>\u0000 </mrow>\u0000 </mfenced>\u0000 </math>\u0000 </jats:inline-formula>, <jats:inline-formula>\u0000 <math xmlns=\"http://www.w3.org/1998/Math/MathML\" id=\"M5\">\u0000 <mfenced open=\"[\" close=\"]\">\u0000 <mrow>\u0000 <mi>p</","PeriodicalId":7498,"journal":{"name":"Advances in High Energy Physics","volume":" ","pages":""},"PeriodicalIF":1.7,"publicationDate":"2021-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42799871","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: 1
Particle Production in Small and Large Systems at High-Energy and High-Density Frontiers 高能高密度前沿小型和大型系统中的粒子产生
IF 1.7 4区 物理与天体物理
Advances in High Energy Physics Pub Date : 2021-08-02 DOI: 10.1155/2021/9792509
Fu-Hu Liu, S. Fakhraddin, R. Sahoo, E. Sarkisyan-Grinbaum, B. K. Singh
{"title":"Particle Production in Small and Large Systems at High-Energy and High-Density Frontiers","authors":"Fu-Hu Liu, S. Fakhraddin, R. Sahoo, E. Sarkisyan-Grinbaum, B. K. Singh","doi":"10.1155/2021/9792509","DOIUrl":"https://doi.org/10.1155/2021/9792509","url":null,"abstract":"<jats:p />","PeriodicalId":7498,"journal":{"name":"Advances in High Energy Physics","volume":" ","pages":""},"PeriodicalIF":1.7,"publicationDate":"2021-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46195210","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
Generalising Holographic Superconductors 广义全息超导体
IF 1.7 4区 物理与天体物理
Advances in High Energy Physics Pub Date : 2021-07-23 DOI: 10.1155/2022/1785050
A. Donini, Víctor Enguita-Vileta, F. Esser, V. Sanz
{"title":"Generalising Holographic Superconductors","authors":"A. Donini, Víctor Enguita-Vileta, F. Esser, V. Sanz","doi":"10.1155/2022/1785050","DOIUrl":"https://doi.org/10.1155/2022/1785050","url":null,"abstract":"In this paper we propose a generalised holographic framework to describe superconductors. We first unify the description of s-, p-, and d-wave superconductors in a way that can be easily promoted to higher spin. Using a semianalytical procedure to compute the superconductor properties, we are able to further generalise the geometric description of the hologram beyond the AdS-Schwarzschild Black Hole paradigm and propose a set of higher-dimensional metrics which exhibit the same universal behaviour. We then apply this generalised description to study the properties of the condensate and the scaling of the critical temperature with the parameters of the higher-dimensional theory, which allows us to reproduce existing results in the literature and extend them to include a possible description of the newly observed f-wave superconducting systems.","PeriodicalId":7498,"journal":{"name":"Advances in High Energy Physics","volume":" ","pages":""},"PeriodicalIF":1.7,"publicationDate":"2021-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47383511","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: 3
Effect of Atomic Number on Plasma Pinch Properties and Radiative Emissions 原子序数对等离子体箍缩特性和辐射发射的影响
IF 1.7 4区 物理与天体物理
Advances in High Energy Physics Pub Date : 2021-07-09 DOI: 10.1155/2021/6611925
W. Sahyouni, Alaa Nassif
{"title":"Effect of Atomic Number on Plasma Pinch Properties and Radiative Emissions","authors":"W. Sahyouni, Alaa Nassif","doi":"10.1155/2021/6611925","DOIUrl":"https://doi.org/10.1155/2021/6611925","url":null,"abstract":"&lt;jats:p&gt;The aim of the research is to examine the dependence of plasma pinch properties and radiation emissions on the atomic number of the operating gas within the dense plasma focus device (NX2) when using hydrogen and argon gases. Simulation was performed with Lee’s code on an NX2 dense plasma focus at a constant gas pressure value (&lt;jats:inline-formula&gt;\u0000 &lt;math xmlns=\"http://www.w3.org/1998/Math/MathML\" id=\"M1\"&gt;\u0000 &lt;msub&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mi&gt;P&lt;/mi&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mn&gt;0&lt;/mn&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;/msub&gt;\u0000 &lt;mo&gt;=&lt;/mo&gt;\u0000 &lt;mn&gt;0.5&lt;/mn&gt;\u0000 &lt;mtext&gt; &lt;/mtext&gt;\u0000 &lt;mtext&gt;torr&lt;/mtext&gt;\u0000 &lt;/math&gt;\u0000 &lt;/jats:inline-formula&gt;). The results showed that the minimum radius of the plasma focus in the case of the hydrogen plasma pinch was 0.30 cm and in the case of the argon plasma pinch 0.17 cm, and this affected the value of the radiation emission as it was &lt;jats:inline-formula&gt;\u0000 &lt;math xmlns=\"http://www.w3.org/1998/Math/MathML\" id=\"M2\"&gt;\u0000 &lt;mn&gt;7.8&lt;/mn&gt;\u0000 &lt;mo&gt;×&lt;/mo&gt;\u0000 &lt;msup&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mn&gt;10&lt;/mn&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mo&gt;−&lt;/mo&gt;\u0000 &lt;mn&gt;6&lt;/mn&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;/msup&gt;\u0000 &lt;mtext&gt; &lt;/mtext&gt;\u0000 &lt;mtext&gt;J&lt;/mtext&gt;\u0000 &lt;/math&gt;\u0000 &lt;/jats:inline-formula&gt; and 11 J for the hydrogen and argon pinch, respectively. The energy of the ion beam released by the breakdown of the plasma pinch was found as &lt;jats:inline-formula&gt;\u0000 &lt;math xmlns=\"http://www.w3.org/1998/Math/MathML\" id=\"M3\"&gt;\u0000 &lt;msub&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mi&gt;E&lt;/mi&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mtext&gt;n&lt;/mtext&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;/msub&gt;\u0000 &lt;mo&gt;=&lt;/mo&gt;\u0000 &lt;mn&gt;23.8&lt;/mn&gt;\u0000 &lt;mtext&gt; &lt;/mtext&gt;\u0000 &lt;mtext&gt;J&lt;/mtext&gt;\u0000 &lt;/math&gt;\u0000 &lt;/jats:inline-formula&gt; in the state of hydrogen and &lt;jats:inline-formula&gt;\u0000 &lt;math xmlns=\"http://www.w3.org/1998/Math/MathML\" id=\"M4\"&gt;\u0000 &lt;msub&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mi&gt;E&lt;/mi&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mtext&gt;n&lt;/mtext&gt;\u0000 &lt;/mrow&gt;\u0000 ","PeriodicalId":7498,"journal":{"name":"Advances in High Energy Physics","volume":" ","pages":""},"PeriodicalIF":1.7,"publicationDate":"2021-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49507139","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: 1
Constraint on the Higgs-Dilaton Potential via Warm Inflation in Two-Time Physics 双时间物理中热暴胀对希格斯-膨胀子势的约束
IF 1.7 4区 物理与天体物理
Advances in High Energy Physics Pub Date : 2021-07-04 DOI: 10.1155/2022/5313952
V. Q. Phong, Ngo Phuc Duc Loc
{"title":"Constraint on the Higgs-Dilaton Potential via Warm Inflation in Two-Time Physics","authors":"V. Q. Phong, Ngo Phuc Duc Loc","doi":"10.1155/2022/5313952","DOIUrl":"https://doi.org/10.1155/2022/5313952","url":null,"abstract":"<jats:p>Within the <jats:inline-formula>\u0000 <math xmlns=\"http://www.w3.org/1998/Math/MathML\" id=\"M1\">\u0000 <mi>S</mi>\u0000 <mi>P</mi>\u0000 <mfenced open=\"(\" close=\")\">\u0000 <mrow>\u0000 <mn>2</mn>\u0000 <mo>,</mo>\u0000 <mi>R</mi>\u0000 </mrow>\u0000 </mfenced>\u0000 </math>\u0000 </jats:inline-formula> symmetry, the two-time model (2T model) has six dimensions with two dimensions of time and the dilaton field that can be identified as inflaton in a warm inflation scenario with potential of the form <jats:inline-formula>\u0000 <math xmlns=\"http://www.w3.org/1998/Math/MathML\" id=\"M2\">\u0000 <mo>~</mo>\u0000 <msup>\u0000 <mrow>\u0000 <mi>ϕ</mi>\u0000 </mrow>\u0000 <mrow>\u0000 <mn>4</mn>\u0000 </mrow>\u0000 </msup>\u0000 </math>\u0000 </jats:inline-formula>. From that consideration, we derive the range of parameters for the Higgs-Dilaton potential, the coupling constant between Higgs and Dilaton (<jats:inline-formula>\u0000 <math xmlns=\"http://www.w3.org/1998/Math/MathML\" id=\"M3\">\u0000 <mi>α</mi>\u0000 </math>\u0000 </jats:inline-formula>) is larger than 0.0053 and the mass of Dilaton is smaller than <jats:inline-formula>\u0000 <math xmlns=\"http://www.w3.org/1998/Math/MathML\" id=\"M4\">\u0000 <mn>1</mn>\u0000 <msup>\u0000 <mrow>\u0000 <mn>0</mn>\u0000 </mrow>\u0000 <mrow>\u0000 <mo>−</mo>\u0000 <mn>7</mn>\u0000 </mrow>\u0000 </msup>\u0000 </math>\u0000 </jats:inline-formula> GeV. Therefore, the 2T model indirectly suggests that extra dimension can also be a source of inflation.</jats:p>","PeriodicalId":7498,"journal":{"name":"Advances in High Energy Physics","volume":" ","pages":""},"PeriodicalIF":1.7,"publicationDate":"2021-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45857306","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: 1
Exact Solutions to the Nonlinear Schrödinger Equation with Time-Dependent Coefficients 非线性时变系数Schrödinger方程的精确解
IF 1.7 4区 物理与天体物理
Advances in High Energy Physics Pub Date : 2021-06-15 DOI: 10.1155/2021/6694980
Xin-Lei Mai, Wei Li, S. Dong
{"title":"Exact Solutions to the Nonlinear Schrödinger Equation with Time-Dependent Coefficients","authors":"Xin-Lei Mai, Wei Li, S. Dong","doi":"10.1155/2021/6694980","DOIUrl":"https://doi.org/10.1155/2021/6694980","url":null,"abstract":"In this paper, a trial function method is employed to find exact solutions to the nonlinear Schrodinger equations with high-order time-dependent coefficients. This system might be used to describe the propagation of ultrashort optical pulses in nonlinear optical fibers, with self-steepening and self-frequency shift effects. The new general solutions are found for the general case including the Jacobi elliptic function solutions, solitary wave solutions, and rational function solutions which are presented in comparison with the previous ones obtained by Triki and Wazwaz, who only studied the special case .","PeriodicalId":7498,"journal":{"name":"Advances in High Energy Physics","volume":" ","pages":"1-17"},"PeriodicalIF":1.7,"publicationDate":"2021-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49629315","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: 2
Amended FRW Metric and Rényi Dark Energy Model 修正的FRW度量和r<s:1>暗能量模型
IF 1.7 4区 物理与天体物理
Advances in High Energy Physics Pub Date : 2021-06-15 DOI: 10.1155/2021/9704909
Sarfraz Ali, Sabir Iqbal, K. Khan, H. Moradi
{"title":"Amended FRW Metric and Rényi Dark Energy Model","authors":"Sarfraz Ali, Sabir Iqbal, K. Khan, H. Moradi","doi":"10.1155/2021/9704909","DOIUrl":"https://doi.org/10.1155/2021/9704909","url":null,"abstract":"This article is devoted to exploring the Rényi holographic dark energy model in the theory of Chern-Simons modified gravity. We studied the deceleration parameter, equation of state, and cosmological plane considering the Amended FRW modal. Modified field equations of -gravity theory gave two independent solutions. In the first case, this model provided the transitional change from deceleration to acceleration compatible with collected observational data. However, it supported a decelerating phase of expansion only in the second case. It was noted that the Equation of State advocated the dominance era under the influence of dark energy in the first case and the second predicted the influence of \u0000 \u0000 Λ\u0000 \u0000 CDM. In both cases, \u0000 \u0000 ω\u0000 <\u0000 0\u0000 ,\u0000 \u0000 \u0000 ω\u0000 \u0000 \u0000 ′\u0000 \u0000 \u0000 <\u0000 0\u0000 \u0000 voted that the universe is in a freezing region and its cosmic expansion is more rapidly accelerated in the background of Chern-Simons modified gravity.","PeriodicalId":7498,"journal":{"name":"Advances in High Energy Physics","volume":"135 47","pages":""},"PeriodicalIF":1.7,"publicationDate":"2021-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41247610","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: 1
Strangeness Enhancement at LHC Energies Using the Thermal Model and EPOSLHC Event Generator 利用热模型和EPOSLHC事件发生器增强LHC能量的奇异性
IF 1.7 4区 物理与天体物理
Advances in High Energy Physics Pub Date : 2021-05-29 DOI: 10.1155/2021/2489232
M. Hanafy, Omnia S. A. Qandil, A. Shalaby
{"title":"Strangeness Enhancement at LHC Energies Using the Thermal Model and EPOSLHC Event Generator","authors":"M. Hanafy, Omnia S. A. Qandil, A. Shalaby","doi":"10.1155/2021/2489232","DOIUrl":"https://doi.org/10.1155/2021/2489232","url":null,"abstract":"The strangeness enhancement signature of QGP formation at LHC energies is carefully tackled in the present study. Based on HRG, the particle ratios of mainly strange and multistrange particles are studied at energies from lower \u0000 \u0000 \u0000 \u0000 s\u0000 \u0000 \u0000 ~\u0000 0.001\u0000 \u0000 up to 13 TeV. The strangeness enhancement clearly appeared at more high energies, and the ratios are confronted to the available experimental data. The particle ratios are also studied using the Cosmic Ray Monte Carlo (CRMC) interface model with its two different event generators, namely, EPOS 1.99 and EPOSlhc, which show a good agreement with the model calculations at the whole range of the energy. We utilize them to produce some particles ratios. EPOS 1.99 is used to estimate particle ratios at lower energies from AGS up to the Relativistic Heavy Ion Collider (RHIC) while EPOSlhc is used at LHC energies. The production of kaons and lambda particles is studied in terms of the mean multiplicity in p-p collisions at energies ranging from 4 to 26 GeV. We find that both HRG model and the used event generators, EPOS 1.99 and EPOSlhc, can describe the particle ratios very well. Additionally, the freeze-out parameters are estimated for different collision systems, such as p-p and Pb-Pb, at LHC energies using both models.","PeriodicalId":7498,"journal":{"name":"Advances in High Energy Physics","volume":" ","pages":""},"PeriodicalIF":1.7,"publicationDate":"2021-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41349609","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
Residual Gauge Invariance in a Massive Lorentz-Violating Extension of QED QED的大规模洛伦兹违反扩展中的剩余规范不变性
IF 1.7 4区 物理与天体物理
Advances in High Energy Physics Pub Date : 2021-05-28 DOI: 10.1155/2022/7396078
B. Marques, A. Scarpelli, J. Felipe, L. Brito
{"title":"Residual Gauge Invariance in a Massive Lorentz-Violating Extension of QED","authors":"B. Marques, A. Scarpelli, J. Felipe, L. Brito","doi":"10.1155/2022/7396078","DOIUrl":"https://doi.org/10.1155/2022/7396078","url":null,"abstract":"We reassess an alternative CPT-odd electrodynamics obtained from a Palatini-like procedure. Starting from a more general situation, we analyze the physical consistency of the model for different values of the parameter introduced in the mass tensor. We show that there is a residual gauge invariance in the model if the local transformation is taken to vary only in the direction of the Lorentz-breaking vector. This residual gauge invariance can be extended to all models whose only source of gauge symmetry breaking is such a mass term.","PeriodicalId":7498,"journal":{"name":"Advances in High Energy Physics","volume":" ","pages":""},"PeriodicalIF":1.7,"publicationDate":"2021-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49651412","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: 2
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