共查询到20条相似文献,搜索用时 0 毫秒
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R. A. Mukhamedshin 《Il Nuovo Cimento C》1996,19(6):1005-1010
Summary Results of the analysis of possible causes of the alignment of energetically distinguished cores of γ-hadron families are
presented. It is shown that the well-known physical factors cannot produce the observed effects. A phenomenological model
based on new Pomeron physics theories and capable of explanation of this phenomenon is proposed.
Paper presented at the Special Session on very high-energy cosmic-ray interactions (superfamilies) of the XXIV International
Cosmic-Ray Conference, Rome, August 28–September 8, 1995. 相似文献
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S. Wycech 《Physics of Particles and Nuclei》2010,41(7):1132-1134
The search for nuclear states of $
\bar K
$
\bar K
mesons poses interesting problems for the nuclear and low energy hadron physics: the behavior of tightly bound nuclear systems
with strongly correlated impurities, the new kind of binding mechanisms and the extension of effective low energy theories
to the strange sector. These problems are briefly presented and a method of variational calculation of the binding energies
is discussed. 相似文献
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V.I. Sharov S.A. Zaporozhets B.P. Adiasevich N.G. Anischenko V.G. Antonenko L.S. Azhgirey V.D. Bartenev N.A. Bazhanov N.A. Blinov N.S. Borisov 《The European Physical Journal C - Particles and Fields》2000,13(2):255-265
New results of the neutron-proton spin-dependent total cross section difference at the neutron beam kinetic energies 1.59, 1.79 and 2.20 GeV are presented. Measurements were performed at the Synchrophasotron
of the Laboratory of High Energies of the Joint Institute for Nuclear Research in Dubna. A quasi-monochromatic neutron beam
was produced by break-up of extracted polarized deuterons. Neutrons were transmitted through a large polarized proton target.
Measurements were performed either with a parallel or an antiparallel beam and target polarizations, both oriented along the
beam momentum. The results at the two higher energies were measured with two opposite beam and target polarization directions.
Only one target polarization direction was available at 1.59 GeV. The present measurements agree well with existing data.
A fast decrease of the values with increasing energy above 1.1 GeV was confirmed. The new results are also compared with model predictions and with
phase shift analysis fits. The quantities for isosinglet state I=0, deduced from the measured values and known data, are given.
Received: 19 August 1999 / Published online: 3 February 2000 相似文献
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N. Tazimi M. Monemzadeh M. R. Hadizadeh 《International Journal of Theoretical Physics》2012,51(9):2871-2877
Quark masses are of great prominence in high-energy physics. In this paper, we have studied the heavy meson systems via solving the Lippmann-Schwinger equation by using the Martin potential for heavy quark masses. We have also attempted to use Martin potential to find an acceptable mass spectrum for heavy quarkonia. We obtained this spectrum via minimal phenomenological model (Melles in Phys. Rev. D. 62:074019, 2000). 相似文献
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《The European Physical Journal C - Particles and Fields》2004,37(1):79-90
New accurate results of the neutron-proton spin-dependent total cross section difference
at the neutron beam kinetic energies 1.39, 1.69, 1.89 and 1.99 GeV are presented. Measurements were carried out in 2001 at the Synchrophasotron of the Veksler and Baldin Laboratory of High Energies of the Joint Institute for Nuclear Research. A quasi-monochromatic neutron beam was produced by break-up of extracted polarized deuterons. The deuteron (and hence neutron) polarization direction was flipped every accelerator burst. The vertical neutron polarization direction was rotated onto the neutron beam direction and longitudinally (L) polarized neutrons were transmitted through a large proton L-polarized target. The target polarization vector was inverted after 1-2 days of measurements. The data were recorded for four different combinations of the beam and target parallel and antiparallel polarization directions at each energy. A fast decrease of
with increasing energy above 1.1 GeV was confirmed. The structure in the
energy dependence around 1.8 GeV, first observed from our previous data, seems to be well pronounced. The new results are also compared with model predictions and with phase shift analysis fits. The
quantities for isosinglet state I = 0, deduced from the measured
values and the known
data, are also given. The results were completed by the measurements of unpolarized total cross sections
at 1.3, 1.4 and 1.5 GeV and
C) at 1.4 and 1.5 GeV. These data were obtained using the same apparatus and high intensity unpolarized deuteron beams were extracted either from the Synchrophasotron, or from the Nuclotron.Received: 13 May 2004, Published online: 12 August 2004G.D. Stoletov: Deceased 相似文献
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《Zeitschrift für Physik B Condensed Matter》1997,103(3-4):383-390
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Omar Mustafa S. Habib Mazharimousavi 《International Journal of Theoretical Physics》2009,48(1):183-193
Non-Hermitian but
-symmetrized spherically-separable Dirac and Schr?dinger Hamiltonians are considered. It is observed that the descendant Hamiltonians
H
r
, H
θ
, and H
φ
play essential roles and offer some “user-feriendly” options as to which one (or ones) of them is (or are) non-Hermitian.
Considering a
-symmetrized H
φ
, we have shown that the conventional Dirac (relativistic) and Schr?dinger (non-relativistic) energy eigenvalues are recoverable.
We have also witnessed an unavoidable change in the azimuthal part of the general wavefunction. Moreover, setting a possible
interaction V(θ)≠0 in the descendant Hamiltonian H
θ
would manifest a change in the angular θ-dependent part of the general solution too. Whilst some
-symmetrized H
φ
Hamiltonians are considered, a recipe to keep the regular magnetic quantum number m, as defined in the regular traditional Hermitian settings, is suggested. Hamiltonians possess properties similar to the
-symmetric ones (here the non-Hermitian
-symmetric Hamiltonians) are nicknamed as pseudo-
-symmetric. 相似文献
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Jan Paseka 《International Journal of Theoretical Physics》2011,50(4):1198-1205
We show that an η
+-pseudo-Hermitian operator for some metric operator η
+ of a quantum system described by a Hilbert space H{\mathcal{H}} yields an isomorphism between the partially ordered commutative group of linear maps on H{\mathcal{H}} and the partially ordered commutative group of linear maps on Hr+{\mathcal{H}}_{\rho_{+}}. The same applies to the generalized effect algebras of positive operators and to the effect algebras of c-bounded positive operators on the respective Hilbert spaces H{\mathcal{H}} and Hr+{\mathcal{H}}_{\rho_{+}}. Hence, from the standpoint of (generalized) effect algebra theory both representations of our quantum system coincide. 相似文献
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The de Sitter solution to the positive cosmological Einstein field equation has been viewed as a one-sheeted hyperboloid embedded
in a five dimensional Minkowski space. To find Lagrangian equation of supersymmetry-group in the de Sitter space, the different
spinor field’s quantization have been demonstrated. In this work, the first quantization of spin
field in the time-space de Sitter universe with ambient space notation has been done. 相似文献
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Jian-Yuan Cheng 《International Journal of Theoretical Physics》2011,50(1):228-232
Parity-time (PT)(\mathcal {P}\mathcal {T}) symmetric Klein-Gordon oscillator is presented using PT\mathcal {P}\mathcal {T}-symmetric minimal substitution. It is shown that wave equation is exactly solvable, and energy spectrum is the same as that
of Hermitian Klein-Gordon oscillator presented by Bruce and Minning. Landau problem of PT\mathcal {P}\mathcal {T}-symmetric Klein-Gordon oscillator is discussed. 相似文献