Bound states and resonance states of the plasma-embedded tdμ and ddμ molecular ions

2008 ◽  
Vol 48 (2) ◽  
pp. 157-165 ◽  
Author(s):  
S. Kar ◽  
Y. K. Ho
Keyword(s):  
Bound States ◽  
Molecular Ions ◽  
Resonance States

scholarly journals The Genuine Resonance of Full-Charm Tetraquarks

Universe ◽  
2021 ◽  
Vol 7 (5) ◽  
pp. 155
Author(s):  
Xiaoyun Chen
Keyword(s):  
Quark Model ◽  
Bound States ◽  
Expansion Method ◽  
Chiral Quark Model ◽  
Stabilization Method ◽  
Scaling Method ◽  
Resonance States ◽  
Gaussian Expansion Method ◽  
Color Structure ◽  
Quantum Numbers

In this work, the genuine resonance states of full-charm tetraquark systems with quantum numbers JPC=0++,1+−,2++ are searched in a nonrelativistic chiral quark model with the help of the Gaussian Expansion Method. In this calculation, two structures, meson-meson and diquark–antidiquark, as well as their mixing with all possible color-spin configurations, are considered. The results show that no bound states can be formed. However, resonances are possible because of the color structure. The genuine resonances are identified by the stabilization method (real scaling method). Several resonances for the full-charm system are proposed, and some of them are reasonable candidates for the full-charm states recently reported by LHCb.

NON-ADIABATIC COUPLED REARRANGEMENT CHANNEL CALCULATION OF ENERGY FOR MUONIC MOLECULE ttμ IN THE HYPER-SPHERICAL APPROACH

2006 ◽  
Vol 15 (01) ◽  
pp. 247-254
Author(s):  
M. MAHDAVI
Keyword(s):  
Binding Energy ◽  
Ground State ◽  
Bound States ◽  
Adiabatic Approximation ◽  
Spherical Surface ◽  
Molecular Ions ◽  
Adiabatic Expansion ◽  
Muonic Molecule ◽  
Channel Calculation ◽  
Three Body

The hyper-spherical adiabatic expansion is a representation for the investigation of the muonic three-body bound states. In this research, we have used the method of hyper-spherical "surface" functions for the muonic molecule, tritium-tritium-muon. Through this approach, the binding energy of the ground state and the lowest eigenpotentials for the muonic molecular ions are calculated in the extreme adiabatic approximation. The results obtained are close to the calculation of other researchers.

CONSTRUCTION OF METASTABLE STATES IN QUANTUM ELECTRODYNAMICS

2004 ◽  
Vol 16 (01) ◽  
pp. 1-28 ◽  
Author(s):  
MATTHIAS MÜCK
Keyword(s):  
Quantum Electrodynamics ◽  
Remainder Term ◽  
Bound States ◽  
Golden Rule ◽  
Metastable States ◽  
Time Interval ◽  
Resonance States ◽  
Fermi's Golden Rule ◽  
The One ◽  
Fermi’S Golden Rule

In this paper, we construct metastable states of atoms interacting with the quantized radiation field. These states emerge from the excited bound states of the non-interacting system. We prove that these states obey an exponential time-decay law. In detail, we show that their decay is given by an exponential function in time, predicted by Fermi's Golden Rule, plus a small remainder term. The latter is proportional to the (4+β)th power of the coupling constant and decays algebraically in time. As a result, though it is small, it dominates the decay for large times. A central point of the paper is that our remainder term is significantly smaller than the one previously obtained in [1] and as a result we are able to show that the time interval during which the Fermi's Golden Rule can be observed is significantly longer that the time interval obtained in [1]. This improvement is achieved by incorporating a part of the complex dilatation resonance states into our construction of the metastable states rather than using the unperturbed eigenstates (the excited bound states of the non-interacting system). Thus, the connection to resonance states allows us to introduce metastable states which qualify better in the description of unstable excited states of the interacting system.

CALCULATION OF BINDING ENERGY FOR THE CHARGE-NONSYMMETRIC MUONIC MOLECULES IN THE HYPER-SPHERICAL APPROACH

2005 ◽  
Vol 20 (02) ◽  
pp. 145-153 ◽  
Author(s):  
M. R. ESKANDARI ◽  
M. MAHDAVI
Keyword(s):  
Binding Energy ◽  
Ground State ◽  
Bound States ◽  
Adiabatic Approximation ◽  
Spherical Surface ◽  
Molecular Ions ◽  
Adiabatic Expansion ◽  
Three Body

The hyper-spherical adiabatic expansion is a representation for the investigation of the muonic three-body bound states. In this research we have used the method of hyper-spherical "surface" functions for charge-nonsymmetric muonic molecules (isotopes of helium-deuterium-muon). Through this approach, the binding energy of the ground state and the lowest eigenpotentials for the muonic molecular ions are calculated in extreme adiabatic approximation. The obtained results are close to other's calculation.

Zum Mechanismus der Spaltfragment-induzierten Desorption / About the Mechanism of Fission-Fragment Induced Desorption

1977 ◽  
Vol 32 (10) ◽  
pp. 1084-1092 ◽  
Author(s):  
Franz R. Krueger
Keyword(s):  
Surface Potential ◽  
Mass Spectroscopy ◽  
Fission Fragment ◽  
Bound States ◽  
Electron Plasma ◽  
Molecular Ions ◽  
Time Dependent ◽  
Thermally Activated ◽  
Fission Fragments ◽  
Secondary Ion

The desorption of even big molecular ions after the passage of fission fragments is described by a short-lived collective perturbation of the surface potential, which is primarily caused by an excitation of the electron plasma. In secondary ion mass spectroscopy and laser induced desorption similar perturbations occur. These processes can be described microscopically as emission of thermally activated ions out of bound states by the time-dependent perturbation, and macroscopically as a temporary lowering of the electrochemical surface potential

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