scholarly journals Multiplicity distribution of electron-positron pairs created by strong external fields

1992 ◽  
Vol 46 (1) ◽  
pp. 261-269 ◽  
Author(s):  
Christoph Best ◽  
Walter Greiner ◽  
Gerhard Soff
Keyword(s):  
Multiplicity Distribution ◽  
External Fields ◽  
Electron Positron

OSCILLATORY MOMENTS IN LEE-YANG ZEROS AND LHC PREDICTIONS

2009 ◽  
Vol 24 (18n19) ◽  
pp. 3447-3454 ◽  
Author(s):  
A. DEWANTO ◽  
A. H. CHAN ◽  
Z. H. LIM ◽  
C. H. OH
Keyword(s):  
Experimental Data ◽  
Quantum Chromodynamics ◽  
Generating Function ◽  
Multiplicity Distribution ◽  
High Energy ◽  
Energy Collision ◽  
Oscillatory Behaviour ◽  
High Energy Collision ◽  
Electron Positron ◽  
Scattering Events

We study the moments of multiplicty distribution and its relation to the Lee-Yang zeros of the generating function in electron-positron and hadron-hadron high energy collision. Our work shows that GMD moments can reproduce the oscillatory behaviour as shown in the experimental data and predicted by quantum chromodynamics at preasymptotic energy, while it can also be used to distinguish electron-positron (e+e-) multiplicity data from hadron-hadron (pp and [Formula: see text]) multiplicity. Furthermore, there seems to be a link between the development of shoulder structure in the multiplicity distribution and the development of ear structure in the Lee-Yang zeros. We predict that these structures is going to be very obvious at 14 TeV. We argue that the development of these structures indicates an ongoing transition from quark-dominated soft scattering events to gluon-dominated semihard scattering events.

ANISOTROPIC PRESSURES IN VERY DENSE MAGNETIZED MATTER

2008 ◽  
Vol 17 (11) ◽  
pp. 2107-2123 ◽  
Author(s):  
A. PÉREZ MARTÍNEZ ◽  
H. PÉREZ ROJAS ◽  
H. J. MOSQUERA CUESTA
Keyword(s):  
Symmetry Breaking ◽  
Strange Quark ◽  
Dense Matter ◽  
External Fields ◽  
Conservation Of Energy ◽  
Transverse Pressure ◽  
Electron Positron ◽  
Energy And Momentum ◽  
Anisotropic Pressures

The problem of anisotropic pressures arising from the spatial symmetry breaking introduced by an external magnetic field in quantum systems is discussed. The role of the conservation of energy and momentum of external fields as well as of systems providing boundary conditions in quantum statistics is considered. The vanishing of the average transverse momentum for an electron–positron system in its Landau ground state, i.e. the vanishing of its transverse pressure, is shown. The situation for the neutron case and strange quark matter (SQM) in β equilibrium is briefly discussed. Thermodynamical relations in external fields as well as the form of the stress tensor in a quantum relativistic medium are obtained. The ferromagnetic symmetry breaking is briefly discussed for very dense matter. It is concluded that stable matter cannot exist for fields greater than B = 1018 G.

scholarly journals Equilibrium electric current of massive electrons with anomalous magnetic moments induced by a magnetic field and the electroweak interaction with matter

2018 ◽  
Vol 33 (26) ◽  
pp. 1850154 ◽  
Author(s):  
Maxim Dvornikov
Keyword(s):  
Magnetic Field ◽  
Exact Solution ◽  
External Magnetic Field ◽  
Electric Current ◽  
Magnetic Moments ◽  
Electroweak Interaction ◽  
External Fields ◽  
Electron Positron ◽  
Electrons And Positrons ◽  
A Current

We study the possibility of the existence of the electric current, formed by massive electrons and positrons, flowing along an external magnetic field. The charged fermions are supposed to have nonzero anomalous magnetic moments and electroweakly interact with background matter. The expression for the current is obtained on the basis of the exact solution of the Dirac equation in the corresponding external fields. We demonstrate that, in the state of equilibrium, such a current is vanishing for any characteristics of the electron–positron plasma as well as the external fields. Our results are compared with the recent findings of other authors.

Electromagnetic decay of Monopole–Antimonopole pair

2018 ◽  
Vol 33 (12) ◽  
pp. 1850068 ◽  
Author(s):  
Giorgio Calucci
Keyword(s):  
Multiplicity Distribution ◽  
Electromagnetic Decay ◽  
Angular Correlations ◽  
Electron Positron ◽  
Perturbative Treatment

A Monopole–Antimonopole pair could annihilate producing a photon shower: Some aspects of the shower like the multiplicity distribution and angular correlations are investigated within a model suitable for processes with high multiplicities and therefore difficult to deal with standard perturbative treatment. The possible production of electron–positron pairs is also considered.

Multifractal Crossover in the Multiplicative Processes

Fractals ◽  
1997 ◽  
Vol 05 (04) ◽  
pp. 661-663
Author(s):  
A. Bershadskii
Keyword(s):  
Experimental Data ◽  
Multiplicity Distribution ◽  
Effective Capacity ◽  
Recent Experimental Data ◽  
Space Filling ◽  
High Energies ◽  
Capacity Dimension ◽  
Electron Positron Annihilation ◽  
Electron Positron ◽  
Multiplicative Processes

It is shown, using multifractal data on space-filling bearings, that there exists a multifractal crossover to an effective 'capacity' dimension in some multiplicative processes. This result is then used to interpret recent experimental data on multifractal structure of multiplicity distribution in electron-positron annihilation at high energies.

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