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"Electromagnetism"
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Describes the core concepts of electromagnetism and their many applications in everyday life, from watching television to using a computer, and suggests related activities.
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Unitarity implications of Formula omitted and Formula omitted models with Lorentz invariance violation in Formula omitted
We studied two different models that included Lorentz Invariance Violation coupling in the scattering processes of [Formula omitted]. We found that using the model with the dual electromagnetic tensor [Formula omitted] resulted in violations of unitarity in both vector and axial scenarios. On the other hand, using the model with nonminimal coupling with [Formula omitted] preserved unitarity in both vector and axial cases. As a result, this could have significant implications, given that the nonminimal coupling model with the dual electromagnetic tensor [Formula omitted] appeared to be potentially superior to the electromagnetic tensor [Formula omitted]. Therefore, we believe that these findings could provide a valuable guide for further exploration into the study of CPT and Lorentz breaking phenomena, with significant implications that are certainly nontrivial.
Journal Article
Next-to-leading-order time-like rho electromagnetic form factors in$${k_{\\textrm{T}}}$$factorization
We calculate the time-like$$\\rho $$ρ electromagnetic (EM) form factor in the$$k_T$$k T factorization formalism by including the next-to-leading-order (NLO) corrections of the leading-twist and sub-leading twist contributions. It’s observed that the NLO correction to the magnitude of the LO leading-twist form factor is lower than$$30\\%$$30 % at large invariant mass squared$$Q^2 > 30 \\,\\text {GeV}^2$$Q 2 > 30 GeV 2 . It is found that the$$\\rho $$ρ meson EM form factor is dominated by twist-3 contribution instead of by twist-2 one because of the end-point enhancement. The theoretical predictions of the moduli of three helicity amplitudes and total cross section are analyzed at$$\\sqrt{s}=10.58$$s = 10.58 GeV, which are consistent with measurements from BABAR Collaboration.
Journal Article
Relativistic effects in the strong and electromagnetic decays of the$${D^}$$meson
In this paper, we solve the complete Salpeter equation and use the obtained relativistic wave function to calculate the strong and radiative electromagnetic decays of the$${D^*}$$D ∗ meson. We obtain the results$$\\Gamma (D^{*}(2007)^{0}\\rightarrow D^{0}\\pi ^{0})=34.6~\\textrm{keV}$$Γ ( D ∗ ( 2007 ) 0 → D 0 π 0 ) = 34.6 keV and$$\\Gamma (D^{*}(2007)^{0}\\rightarrow D^{0}\\gamma )=19.4~\\textrm{keV}$$Γ ( D ∗ ( 2007 ) 0 → D 0 γ ) = 19.4 keV , and the estimated full width is$$\\Gamma (D^{*}(2007)^{0})=54.0~\\textrm{keV}$$Γ ( D ∗ ( 2007 ) 0 ) = 54.0 keV . The focus of this study is on the relativistic corrections. In our method, the wave function of the D meson is not a pure S -wave, but includes both a non-relativistic S -wave and a relativistic P -wave, while the wave function of the$$D^*$$D ∗ meson includes a non-relativistic S -wave as well as both relativistic P -wave and D -wave. Therefore, in this case, the decay$${D^{*}\\rightarrow {D}\\gamma }$$D ∗ → D γ is not a non-relativistic M 1 transition, but rather an$$M1+E2+M3+E4$$M 1 + E 2 + M 3 + E 4 decay. We find that in a strong decay$$D^{*}\\rightarrow {D}{\\pi }$$D ∗ → D π , the non-relativistic contribution is dominant, while in an electromagnetic decay$${D^{*}\\rightarrow {D}\\gamma }$$D ∗ → D γ , the relativistic correction is dominant.
Journal Article
Femtosecond laser-treated SiO.sub.2 nanocomposites for EMI shielding and preserved optical transparency
This study advances glass nanocomposite research by achieving exceptional Electromagnetic Interference (EMI) shielding while maintaining optical transparency. We employ femtosecond laser engraving and thermal vapor deposition to create precise periodic line patterns on fused quartz glass, which serve as a framework for the controlled deposition of silver (Ag) and gold (Au) nanoparticles through laser-ablated micro-channels. These nanocomposites effectively balance EMI shielding and optical transmittance, making them suitable for applications in electronics, aerospace, and telecommunications. Femtosecond laser ablation allows for meticulous glass surface modification. Using an XY motorized translation stage guided by a photoresist, we form line patterns with spacings of 200, 400, and 600 µ-meter, resulting in Shielding Effectiveness (SE) in the range of 10-37 dB. Notably, despite substantial modification, the glass nanocomposites retain optical transmittance comparable to clear glass, enhancing their utility in applications where visual clarity is essential, such as windows, displays, and security infrastructure. By integrating femtosecond laser ablation with controlled thermal deposition, we produce multifunctional glass nanocomposites that offer promising EMI shielding and optical transparency, paving the way for advanced materials in industries where both properties are critical.
Journal Article
Analysis of the Formula omitted molecular pentaquark state by its electromagnetic properties
We are systematically studying the electromagnetic characteristics of multiquark systems to shed light on their internal structure, whose nature and quantum numbers are controversial. In this study, we investigate the magnetic dipole, electric quadrupole, and magnetic octupole moments of the [Formula omitted] state within the context of the QCD light-cone sum rule. During this analysis, we posit that the [Formula omitted] state assumes a molecular structure with quantum numbers [Formula omitted]. The extracted outcomes are given as [Formula omitted], [Formula omitted], and [Formula omitted]. The findings of this study, when considered alongside other pertinent characteristics, may assist in elucidating the nature of this controversial phenomenon.
Journal Article