Results 41 to 50 of about 1,551 (72)

Bound states of scalar particles in the presence of a short range potential

, 2005
We analyze the behavior of the energy spectrum of the Klein-Gordon equation in the presence of a truncated hyperbolic tangent potential. From our analysis we obtain that, for some values of the potential there is embedding of the bound states into the ...
Fleischer W., Fulling S. A., Khalilov V. R., Khalilov V. R., LUIS A. GONZÁLEZ-DÍAZ, Popov V. S., Rafelski J., VICTOR M. VILLALBA   +7 more
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Spectral bounds for the Hellmann potential

, 2001
The method of potential envelopes is used to analyse the bound state spectrum of the Schroedinger Hamiltonian H=-\Delta+V(r), where the Hellmann potential is given by V(r) = -A/r + Be^{-Cr}/r, A and C are positive, and B can be positive or negative.
Adamowski, Adamowski, Alekseev, Alekseev, Bebnarek, Buttner, Callaway, Callaway, Duarte, Dutt, Gombas, Gryaznov, Gryaznov, Hall, Hall, Hall, Hellmann, Hellmann, Hellmann, Hellmann, Hellmann, Hellmann, Iafrate, Kwato Njock, McGinn, Pollmann, Qutaibeh D. Katatbeh, Reed, Richard L. Hall, Varshni   +29 more
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Missing solution in a Cornell potential

, 2013
Missing bound-state solutions for fermions in the background of a Cornell potential consisting of a mixed scalar-vector-pseudoscalar coupling is examined.
Castro, L. B., de Castro, A. S.
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Quantization of bosonic fields with two mass and spin states

, 2008
We investigate bosonic fields possessing two mass and spin states. The density matrix in the first order formalism is obtained. The quantization of fields in the first order formulation is performed and propagators are found.Comment: 9 ...
Ahieser A. I., Buchbinder I. L., Kruglov S. I., Kruglov S. I., S. I. KRUGLOV   +4 more
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Neutron charge radius and the Dirac equation

, 1999
We consider the Dirac equation for a finite-size neutron in an external electric field. We explicitly incorporate Dirac-Pauli form factors into the Dirac equation.
A. I. L’vov, D. R. Yennie, H. A. Bethe, H. Leeb, J. Bernabeu, J. Byrne, J. L. Friar, K. W. McVoy, L. Koester, L. L. Foldy, M. Bawin, M. Bawin, M. Bawin, M. D. Scadron, R. G. Sachs, S. A. Coon, S. Kopecky, S. R. de Groot, V. M. Shekhter, Yu. A. Alexandrov, Yu. A. Alexandrov, Yu. A. Alexandrov   +21 more
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Relativistic Comparison Theorems

, 2010
Comparison theorems are established for the Dirac and Klein--Gordon equations. We suppose that V^{(1)}(r) and V^{(2)}(r) are two real attractive central potentials in d dimensions that support discrete Dirac eigenvalues E^{(1)}_{k_d\nu} and E^{(2)}_{k_d ...
A. Messiah, Richard L. Hall, W. Greiner
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Dirac equation exact solutions for generalized asymmetrical Hartmann potentials

, 2006
In this work we solve the Dirac equation by constructing the exact bound state solutions for a mixing of vector and scalar generalized Hartmann potentials. This is done provided the vector potential is equal to or minus the scalar potential. The cases of
A. de Souza Dutra, Abramowitz, Alhaidari, Alhaidari, Alhaidari, Chen, Chen, Chen, Chen, Chen, de Castro, de Souza Dutra, de Souza Dutra, Flessas, Flügge, Hartmann, Hautot, Landau, M. Hott, Morse, Ushveridze, Vaidya   +21 more
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Multi-population Black Hole Algorithm for the problem of data clustering. [PDF]

PLoS One, 2023
Salih SQ, Alsewari AA, Wahab HA, Mohammed MKA, Rashid TA, Das D, Basurra SS.   +6 more
europepmc   +1 more source

Seroprevalence and associated factors of HIV and Hepatitis C in Brazilian high-security prisons: A state-wide epidemiological study. [PDF]

PLoS One, 2021
Defante Ferreto LE, Guedes S, Braz Pauli F, Soligo Rovani S, Aní Caovilla Follador F, Paula Vieira A, Himovski Torres R, Colares Coelho H, Welter Wendt G.   +8 more
europepmc   +1 more source

The comparison of the 3-fluid dynamic model with experimental data

, 2015
The method of comparison of theoretical predictions with experimental data had been developed.This method allows estimate the quality of theory. Published theoretical data of the three-fluid dynamic (3FD) model applied to the experimental data from heavy-
Kizka, V. A.
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