International Journal of Modern Physics A

In this article, we present a detailed study of the masses of all gauge bosons, as well as explaining recent experimental data regarding the W-boson mass presented by the CDF collaboration and even possible changes that these data can bring to experimental measurements of the masses of Z-boson mass in the context of the Minimal Supersymmetric $\mathrm{\text{SU}}{(3)}_C\otimes \mathrm{\text{SU}}{(3)}_L\otimes \mathrm{\text{U}}{(1)}_N$ Model. We also intend to show a phenomenological analysis of possible mixtures of gauge bosons in this model. We will show that our numerical predictions for the masses of the physical gauge bosons are within the current experimental limits.

This study focuses on precisely calculating analytical critical points for rotating regular Anti-de Sitter (AdS) black holes, examining scenarios with and without external dark field contributions. Importantly, it represents the first attempt to compute critical points for this specific class of rotating black holes. Our primary focus is on investigating the impact resulting from variations in the charge of nonlinear electrodynamics on the critical phenomena of rotating regular AdS black holes, while also incorporating the influence of quintessence field contributions. The analytical investigation is concentrated on the horizon radius, employing two distinct approaches to simplify the complexity and length of the calculations. Furthermore, our examination extends to deciphering the intricate relationship between dark energy and critical phenomena. This involves visually portraying a range of critical behaviors and detailing a recent discovery regarding how the intensity of quintessence affects phase transitions. The shift in these transitions conforms to either a concave or convex function, a characteristic dependent on the sign of quintessence intensity.

The multiplicity dependence of the production of the charm mesons in pp collisions at $\sqrt{s}=7$TeV and 13TeV as measured by ALICE experiment has been investigated using Pythia 8 event generator by studying the effect of various processes at partonic level such as the effect of different modes of color reconnections and rope hadronization. The relative yields ($\mathrm{\text{Yield}}∕〈\mathrm{\text{Yield}}〉$) of D-mesons and $J∕\psi$ as a function of relative charged particle multiplicity for various transverse momentum ($p_{\text{T}}$) ranges as measured by the ALICE experiment are in reasonable agreement with the estimations of Pythia 8 model within the framework of microscopic processes. The relative yields of B mesons for various $p_{\text{T}}$ intervals ($1<p_{\text{T}}<20$GeV/c) have also been predicted in pp collisions at $\sqrt{s}=7$TeV and $\sqrt{s}=13$TeV.

In this work, the angular distribution of atmospheric cosmic muons is studied using PYTHIA8 simulations, comparing it to the experimental data. The standalone code in PYTHIA8 consists of an atmosphere of only nitrogen molecules. Here, the standalone code has been augmented adding oxygen molecules with a relative abundance of 78:22 (Nitrogen:Oxygen) to resemble a more realistic atmosphere. The vertical flux intensity ($I_{\mu }(\theta )$) of cosmic muons varies with zenith angle as a function of ${\text{cos}}^n\theta$, where $\theta$ is the zenith angle and n is the exponent term. The vertical flux intensity of cosmic muons has been characterized as a function of zenith angle ($\theta$), momentum (p) and energy (E). Simulations are compared to the experimental results found in the literature and to the measurements performed at the surface laboratories of SINP (Kolkata) and JUSL (Jadugoda) at two different latitudes and altitudes in May 2024. The integrated vertical muon flux ($I_{\mu }(0)$) and the exponent term (n) are extracted by fitting each experimental dataset. The simulated vertical flux intensity ($I_{\mu }(\theta )$) as a function of the zenith angle ($\theta$) of cosmic muons shows a good level of agreement with the spectral shape of our experimental data as well as with that from literature. This study highlights the relevance of PYHTIA8 in the context of air-shower simulations, improving its predictive power by incorporating a more realistic atmospheric model.

In this work, the Ginzburg–Landau theory is represented on a symplectic manifold with a phase space content. The order parameter is defined by a quasi-probability amplitude, which gives rise to a quasi-probability distribution function, i.e. a Wigner-type function. The starting point is the thermal group representation of Euclidean symmetries and gauge symmetry. Well-known basic results on the behavior of a superconductor are re-derived, providing the consistency of representation. The critical superconducting current density is determined and its usual behavior is inferred. The negativity factor associated with the quasi-distribution function is analyzed, providing information about the nonclassicality nature of the superconductor state in the region closest to the edge of the superconducting material.

LHCb data on $B^0\to J∕\psi {\pi }^{+}{\pi }^{-}$, $B_s^0\to J∕\psi {\pi }^{+}{\pi }^{-}$ and $B_s^0\to J∕\psi K^{+}{K}^{-}$ are fitted in a coupled-channel analysis jointly with data on radiative $J∕\psi$ decays, $\pi \pi$ elastic scattering and further data sets. Branching ratios for $B_{(s)}^0\to J∕\psi f_0,f_2$ are determined and compared to those from radiative $J∕\psi$ decays. Above 1500MeV, only little intensity is observed in $B_{(s)}^0\to J∕\psi f_0,f_2$ decays. In radiative $J∕\psi$ decays, the intensities are strong and peak at 1865MeV in the scalar wave and at 2210MeV in the tensor wave. This pattern is interpreted as further support for the glueball interpretation of $G_0(1865)$ and of $G_2(2210)$.

In this paper, we explore the Casimir effect of a rough membrane within the framework of theories that break Lorentz symmetry. We consider two constant aether vectors: one time-like and other space-like, simultaneously. We employ an appropriate change of coordinates such that the membrane assumes a completely flat border and the remaining terms associated with the roughness are considered as part of the potential. Quantum fluctuations are induced by a scalar quantum field subject to Dirichlet boundary conditions. The spectrum is obtained through perturbation theory and regularized using the $\zeta$-function method. We provide an explicit example of a membrane with periodic boundaries. The presence of aether vectors has a significant impact on the dominant term of the Casimir effect, while roughness only affects the secondary terms. Additionally, we examine the finite-temperature case.