Article
Physics, Nuclear
Chandni Menapara, Ajay Kumar Rai
Summary: This study investigates the properties of Omega with sss quarks using the hypercentral Constituent Quark Model (hCQM) and compares the findings with other approaches and experimental results.
Article
Physics, Nuclear
D. G. Sindhu, Akhilesh Ranjan, Hemwati Nandan
Summary: In recent years, many tetraquark and pentaquark states have been discovered, and some of the interesting ones include X(3872), Zc(3900), X(4430), P-c(+)(4312), and Pc+(4457). The Regge trajectories of these states were studied using the flux tube model of hadrons, considering finite quark masses. The analysis focused on the effect of flux tube length variation on the Regge trajectories, revealing a constant value for string length at a fixed angular momentum. Comparison with other studies and experimental results showed good agreement with our findings.
INTERNATIONAL JOURNAL OF MODERN PHYSICS A
(2023)
Article
Thermodynamics
P. Horak, M. Formanek, T. Fecer, J. Plasek
Summary: This experimental study focuses on the low mass flux of refrigerants R134a, R404A, and R407C in a smooth vertical evaporator tube with an inner diameter of 32 mm. The results indicate that nucleate boiling dominates the heat transfer in the downward-flow refrigerant, and its effectiveness is dependent on the superheated wall of the evaporator tube. The experimentally obtained Nusselt number correlates well with the predicted Nusselt number for mass flux over 10 kg.m(-2).s(-1).
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Physics, Nuclear
Ya Lu, Daniele Binosi, Minghui Ding, Craig D. Roberts, Hui-Yu Xing, Chang Xu
Summary: Accumulating evidence suggests that diquark correlations are important in hadron structure and interactions. Diquark distribution amplitudes are narrower and taller than mesons, influencing momentum distribution. These features could impact baryon distribution functions.
EUROPEAN PHYSICAL JOURNAL A
(2021)
Article
Astronomy & Astrophysics
Adrien Florio, Dmitri E. Kharzeev
Summary: In quantum electrodynamics with charged fermions, a background electric field leads to the chiral anomaly, creating a chirally imbalanced state of fermions through entangled pairs production. The statistical Gibbs entropy associated with these pairs is found to be equal to the entropy of entanglement between right-moving particles and left-moving antiparticles. It is observed that short pulses, such as those from high energy collisions, result in an approximately thermal distribution for the produced particles.
Article
Physics, Particles & Fields
Duojie Jia, Ji-Hai Pan, Cheng-Qun Pang
Summary: A new scheme of state classification is proposed and applied to analyze heavy baryons in P-waves, confirming excited states and predicting trajectories. The results suggest unseen excited states and provide predictions for masses of various baryons, with spin couplings discussed for all considered baryons.
EUROPEAN PHYSICAL JOURNAL C
(2021)
Article
Physics, Nuclear
Chandni Menapara, Ajay Kumar Rai
Summary: The hypercentral Constituent Quark Model (hCQM) is used to determine the resonance masses of hadrons. Corrections are incorporated to improve the spin-order hierarchy. The model includes Coulomb-like and confinement terms, as well as spin-spin interaction terms. The recalculated masses of light and strange baryons are in good agreement with experimental findings and theoretical models.
INTERNATIONAL JOURNAL OF MODERN PHYSICS A
(2023)
Article
Physics, Nuclear
Xue-Chao Feng, Ke-Wei Wei
Summary: This work investigates the mass spectrum of the first radial excitation axial vector meson nonet within the framework of the nonrelativistic constituent quark model and Regge phenomenology. It also explores the strong decay characteristics of these states using the P-3(0) model. The results are compared to values from other phenomenological models and could be useful in the search for 2(3)P(1) meson nonets.
INTERNATIONAL JOURNAL OF MODERN PHYSICS A
(2023)
Article
Thermodynamics
Anand Sundaravel, Suresh Sivan, Santhosh Kumar Deenadayalan
Summary: This paper introduces a new heat transfer correlation based on the heat flux to mass flux ratio for predicting the wall temperature of supercritical water flowing in a bare vertical tube. By using various dimensionless analysis methods and a nonlinear curve fitting approach, a strong correlation for heat transfer was derived. Error analysis was conducted to evaluate and rank various existing correlations along with the new one, proving the best fitting correlation in the process.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2021)
Article
Thermodynamics
Zhaozhi Li, Senlin Wang, Yingjuan Shao, Wenqi Zhong
Summary: This study experimentally investigates the convective heat transfer of supercritical CO2 (sCO2) flowing upward and downward in a 10 mm diameter tube. The effects of heat flux, mass flux, pressure, and flow orientation on heat transfer were examined. The results show that a rising heat flux impairs heat transfer, an increase in mass flux enhances heat transfer, and an increase in pressure harms heat transfer. Downward flow exhibits better heat transfer performance compared to upward flow under the same conditions.
APPLIED THERMAL ENGINEERING
(2023)
Article
Multidisciplinary Sciences
Manuel J. Freire
Summary: This study investigates the use of a metasurface made up of a 2D array of capacitively loaded metallic rings to improve the signal-to-noise ratio and adjust the magnetic near-field radio frequency pattern of MRI surface coils. The increased coupling between the metallic rings in the array leads to an improved signal-to-noise ratio. An efficient algorithm, the discrete model, is used to analyze the input resistance and radiofrequency magnetic field of the metasurface loaded coil, and it is found that the optimal signal-to-noise ratio occurs at frequencies between resonances introduced by the metasurface. Structural parameters of the metasurface are optimized to enhance the signal-to-noise ratio at these frequencies.
SCIENTIFIC REPORTS
(2023)
Article
Robotics
Pengda Mao, Rao Fu, Quan Quan
Summary: This paper presents a novel method for efficiently solving a trajectory planning problem for swarm robotics in cluttered environments. By constructing an optimal virtual tube and introducing a hierarchical approach, the trajectory planning is optimized.
INTERNATIONAL JOURNAL OF ROBOTICS RESEARCH
(2023)
Article
Astronomy & Astrophysics
Tanjib Khan, David Richards, Frank Winter
Summary: This study calculates the low-lying spectra of the positive-parity Delta and N baryons using the generalized variational method, observing hybrid states with gluonic degrees of freedom playing a structural role in the excited baryon spectrum.
Article
Astronomy & Astrophysics
Zhen Zhang, Peng-Cheng Chu, Xiao-Hua Li, He Liu, Xiao-Min Zhang
Summary: The study investigates the properties of strange-quark matter and u-d quark matter using a quark quasiparticle model, including the equation of state, sound velocity, stability region for star matter, maximum mass of quark stars (QSs), and tidal deformability for QSs. Results show that recently discovered heavy compact stars can be well described as QSs within the quasiparticle model.
Article
Physics, Particles & Fields
Peng-Cheng Chu, Yao-Yao Jiang, He Liu, Zhen Zhang, Xiao-Min Zhang, Xiao-Hua Li
Summary: The study shows that thermodynamic properties of asymmetric quark matter, large mass quark stars, and proto-quark stars are significantly influenced by temperature effects within the quasiparticle model. The recently discovered heavy compact stars can be well described as quark stars within the quasiparticle model.
EUROPEAN PHYSICAL JOURNAL C
(2021)
