The accuracy of several theories for the thermodynamic properties of the Yukawa hard-sphere chain fluid are studied. In particular, we consider the polymer mean spherical approximation (PMSA), the dimer version of thermodynamic perturbation theory (TPTD), and the statistical associating fluid theory for potentials of variable attractive range (SAFT-VR). Since the original version of SAFT-VR for...

For any given potential, linear response theory tells us the size that the von Weizsäcker coefficient must assume in order to obtain the correct energy in the weak coupling limit. With this necessarily imposed choice, the quality of results is investigated as the coupling is strengthened. From the study of a number of model problems (the harmonic oscillator, the Yukawa well and the Mathieu pote...

The newly developed iterative method based on Green function defined by quadratures along a single trajectory is combined with the variational method to solve the ground state quantum wave function for central potentials. As an example , the method is applied to discuss the ground state solution of Yukawa potential, using Hulthen solution as the trial function.

We consider the Newtonian limit of the theory based on the La-grangian L = R + p k=0 a k R2 k R √ −g. The gravitational potential of a point mass turns out to be a combination of Newtonian and Yukawa terms. For sixth-order gravity (p = 1) the coefficients are calculated explicitly. For general p one gets Φ = m/r

We investigate the approximate l-state solutions of Schrödinger equation for Hulthén plus a class Yukawa potential. In this context, we construct bound-state energy and wavefunction expressed by Gauss hypergeometric function means asymptotic iteration approach in detail.

We discuss the phenomenology of many Higgs doublet model the model where each Higgs doublet couples with each own quark and lepton with relatively big Yukawa coupling constants. Namely, we discuss the discovery potential of the Higgs bosons at LHC and find lower mass limits on nonstandard Higgs bosons from FNAl data. ∗E-mail address: [email protected]

_ By requiring the "bound state" of particle and quantum to have the mass of the particle and be physically indistinguishable from the particle we derive fully covariant and unitary equations for particle particle scattering; these reduce to the Lippmann-Schwinger equation for Yukawa potential scattering in the nonrelativistic kinematic region and provide a new definition of the "nuclear potent...

One of the intriguing achievements of the superstring derived standard–like models in the free fermionic formulation is the possible explanation of the top quark mass hierarchy and the successful prediction of the top quark mass. An important property of the superstring derived standard–like models, which enhances their predictive power, is the existence of three and only three generations in t...

We discuss gauge and Yukawa unification in the context of a supersymmetric model with bilinear R–parity violation. We show that this model allows b− τ Yukawa unification for any value of tanβ while satisfying perturbativity of the couplings. We also find the t − b − τ Yukawa unification easier to achieve than in the MSSM, occurring in a wider high tanβ region. Finaly, we also discuss the compat...

The GRAVITY Collaboration achieved a remarkable detection of the orbital precession S2 star around Galactic Center supermassive black hole, providing yet another proof validity general relativity. departure from Schwarzschild is encoded in parameter ${f}_{\mathrm{SP}}$, which multiplies predicted relativistic precession. This results ${f}_{\mathrm{SP}}=1.10\ifmmode\pm\else\textpm\fi{}0.19$, con...