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1.
S. Albeverio S. N. Lakaev J. I. Abdullaev 《Functional Analysis and Its Applications》2002,36(3):212-216
A Hamiltonian describing four bosons that move on a lattice and interact by means of pair zero-range attractive potentials is considered. A stronger version of the Hunziker–Van Vinter–Zhislin theorem on the essential spectrum is established. It is proved that the set of eigenvalues lying to the left of the essential spectrum is finite for any interaction energy of two bosons and is empty if this energy is sufficiently small. 相似文献
2.
S. N. Lakaev 《Theoretical and Mathematical Physics》1992,91(1):362-372
The existence of bound states and resonances of the Hamiltonian of a system ofN different quantum lattice particles with nonvanishingN-particle short-range interaction is proved. The dependence of the bound states and the resonances on the coupling constant and the quasimomentum is studied.Samarkand State University. Translated from Teoreticheskaya i Matematicheskaya Fizika, Vol. 91, No. 1, pp. 51–65, April, 1992. 相似文献
3.
4.
S. V. Golovkin A. P. Kozhevnikov V. P. Kubarovsky A. I. Kulyavtzev V. F. Kurshetsov A. I. Kushnirenko L. G. Landsberg V. V. Molchanov V. A. Mukhin V. I. Solyanik D. V. Vavilov V. A. Victorov M. Ya. Balatz G. V. Dzubenko A. D. Kamenskii G. K. Kliger V. Z. Kolganov V. S. Lakaev G. S. Lomkatzi A. P. Nilov V. T. Smolyankin V. E. Vishnyakov 《Zeitschrift fur Physik C Particles and Fields》1995,68(4):585-594
In the experiments at the SPHINX facility in 70 GeV proton beam of the IHEP accelerator the coherent diffractive production reactions on carbon nucleip+C [(1385)0
K
++C andp+C[0
K
+]+C were investigated. The evidences for new baryon states were obtained in the study of hyperon-kaon effective mass spectra in these two reactions:X (2050) with massM=(2052±6) MeV and width =(35
–35
+22
) MeV inM[(1385)0
K
+] andX(2000) withM=1999±6 MeV and =91±17 MeV inM[0
K
+]. The unusual features of these massive states (small enough decay widths, anomalously large branching ratios for decays with strange particles emission) make them very serious candidates for cryptoexotic pentaquark baryons with hidden strangeness. 相似文献
5.
A model operator similar to the energy operator of a system with a nonconserved number of particles is studied. The essential spectrum of the operator is described, and under some natural conditions on the parameters it is shown that there are infinitely many eigenvalues lying below the bottom of the essential spectrum. 相似文献
6.
For a three-particle operator on a lattice, we study the properties of its spectrum that depend on pairwise interactions and are determined by a parameter characterizing the intensity of interaction. 相似文献
7.
Zh. I. Abullaev I. A. Ikromov S. N. Lakaev 《Theoretical and Mathematical Physics》1995,103(1):390-397
The existence of resonances and embedded eigenvalues of a multidimensional generalized Friedrichs model is studied. The existence of a Friedrichs model with a given number of eigenvalues located within the continuous spectrum is proved. The existence of resonances is shown, and the widths of these resonances are calculated.Translated from Teoreticheskaya i Matematicheskaya Fizika, Vol. 103, No. 1, pp. 54–62, April, 1995. 相似文献
8.
Theoretical and Mathematical Physics - For a wide class of two-particle Schrödinger operators H(k) = H0(k) + V, k ∈ $$\mathbb{T}^d$$, corresponding to a two-fermion system on a... 相似文献
9.
We consider the Hamiltonian , describing the motion of one quantum particle on a three-dimensional lattice in an external field. We investigate the number
of eigenvalues and their arrangement depending on the value of the interaction energy for μ ≥ 0 and λ ≥ 0.
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Translated from Teoreticheskaya i Matematicheskaya Fizika, Vol. 158, No. 3, pp. 425–443, March, 2009. 相似文献
10.
S. N. Lakaev 《Journal of Mathematical Sciences》1989,45(6):1540-1563
The spectrum and the resonance of the generalized Friedrichs model are studied. The existence of the wave operators and of the scattering operator is established. The structure of the resonances, the connection between resonances and eigenvalues, and the singularities of the scattering matrix are investigated.Translated from Trudy Seminara imeni I. G. Petrovskogo, No. 11, pp. 210–238, 1986. 相似文献