Theory of bound states of charged particles in resonance media

1981 ◽  
Vol 49 (2) ◽  
pp. 1035-1038 ◽  
Author(s):  
�. A. Manykin ◽  
M. I. Ozhovan ◽  
P. P. Polu�ktov
Keyword(s):  
Bound States ◽  
Charged Particles

scholarly journals On the abundance of primordial bound states of superheavy magnetic monopoles

2014 ◽  
Vol 29 (18) ◽  
pp. 1450100
Author(s):  
Dmitry R. Gulevich
Keyword(s):  
Cosmic Rays ◽  
Bound States ◽  
Charged Particles ◽  
Magnetic Monopoles ◽  
Final Concentration ◽  
Ultrahigh Energy ◽  
Cosmic Inflation ◽  
Electron Positron ◽  
Ultrahigh Energy Cosmic Rays

It has been suggested that superheavy charged particles might have been born in primordial bound pairs at the end of cosmic inflation. Such pairs have been proposed as a source of ultrahigh energy cosmic rays (UHECR). We show that primordial bound pairs of magnetic monopoles larger than 10-9 cm quickly thermalise due to the interaction with primordial electron–positron plasma and any such initial primordial concentration is washed out. The final concentration will therefore be defined by their equilibrium abundance.

scholarly journals Neutral baryonic systems with strangeness

2020 ◽  
Vol 29 (01) ◽  
pp. 1930009
Author(s):  
H. Garcilazo ◽  
A. Valcarce ◽  
J. Vijande
Keyword(s):  
Bound States ◽  
Current Knowledge ◽  
Charged Particles ◽  
Quasibound State ◽  
Stable States ◽  
Broad Agreement ◽  
The Status

We review the status as regards to the existence of three- and four-body bound states made of neutrons and [Formula: see text] hyperons. For interesting cases, the coupling to neutral baryonic systems made of charged particles of different strangeness has been addressed. There are strong arguments showing that the [Formula: see text] system has no bound states. [Formula: see text] strong stable states are not favored by our current knowledge of the strangeness [Formula: see text] and [Formula: see text] baryon–baryon interactions. However, a possible [Formula: see text] quasibound state decaying to [Formula: see text] might exist in nature. Similarly, there is a broad agreement about the nonexistence of [Formula: see text] bound states. However, the coupling to [Formula: see text] states opens the door to a resonance above the [Formula: see text] threshold.

Aharonov–Bohm effect for bound states on spin-0 scalar charged particles in a rotating cosmic string space–time with Coulomb potentials

2020 ◽  
Vol 35 (20) ◽  
pp. 2050101
Author(s):  
Faizuddin Ahmed
Keyword(s):  
Cosmic String ◽  
Quantum Dynamics ◽  
Bound States ◽  
Relativistic Quantum ◽  
Charged Particles ◽  
Topological Defects ◽  
Space Time ◽  
Vector Potentials ◽  
Bohm Effect ◽  
Aharonov Bohm

In this paper, we study the relativistic quantum dynamics of spin-0 scalar charged particles with a magnetic quantum flux produced by topological defects in a rotating cosmic string space–time. We solve the Klein–Gordon equation subject to Coulomb-type scalar and vector potentials in the considered framework and obtain the energy eigenvalues and eigenfunctions and analyze the analogue effect to Aharonov–Bohm effect for bound states.

Catalyzed Big-Bang nucleosynthesis

2008 ◽  
Vol 86 (4) ◽  
pp. 611-616
Author(s):  
M Pospelov
Keyword(s):  
Particle Physics ◽  
Bound States ◽  
Charged Particles ◽  
Big Bang ◽  
Number Density ◽  
Electroweak Scale ◽  
Big Bang Nucleosynthesis ◽  
Elemental Abundances ◽  
Subsequent Decay ◽  
Standard Channel

We point out that the existence of metastable, τ >103 s, negatively charged electroweak-scale particles (X–) alters the predictions for lithium and other primordial elemental abundances for A > 4 via the formation of bound states with nuclei during Big-Bang nucleosynthesis (BBN). In particular, we show that the bound states of X– with helium, formed at temperatures of about T = 108 K, lead to the catalytic enhancement of 6Li production, which is eight orders of magnitude more efficient than the standard channel. In particle physics models, where subsequent decay of X– does not lead to large nonthermal BBN effects, this directly translates to the level of sensitivity to the number density of long-lived X– particles (τ > 105 s) relative to entropy of nX – / s [Formula: see text] 3 × 10–17, which is one of the most stringent probes of electroweak scale remnants known to date. It is also argued that unstable charged particles with lifetime of order ~2000 s may naturally lead to the depletion of 7Li by a factor of two, making it consistent with observationally determined abundances. PACS No.: 98.80.Ft

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