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Titolo:
Skyrmion-anti-Skyrmion annihilation with omega mesons - art. no. 054020
Autore:
Halasz, MA; Amado, RD;
Indirizzi:
Univ Penn, Dept Phys & Astron, Philadelphia, PA 19104 USA Univ Penn Philadelphia PA USA 19104 & Astron, Philadelphia, PA 19104 USA
Titolo Testata:
PHYSICAL REVIEW D
fascicolo: 5, volume: 6305, anno: 2001,
pagine: 4020 -
SICI:
0556-2821(20010301)6305:5<4020:SAWOM->2.0.ZU;2-A
Fonte:
ISI
Lingua:
ENG
Soggetto:
NUCLEON-ANTINUCLEON INTERACTION; N(N)OVER-BAR ANNIHILATION; VECTOR-MESONS; MODEL; DIMENSIONS; SCATTERING; DYNAMICS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
--discip_EC--
Citazioni:
21
Recensione:
Indirizzi per estratti:
Indirizzo: Halasz, MA Univ Penn, Dept Phys & Astron, Philadelphia, PA 19104 USA Univ Penn Philadelphia PA USA 19104 Philadelphia, PA 19104 USA
Citazione:
M.A. Halasz e R.D. Amado, "Skyrmion-anti-Skyrmion annihilation with omega mesons - art. no. 054020", PHYS REV D, 6305(5), 2001, pp. 4020

Abstract

We study numerically the annihilation of an omega -stabilized Skyrmion andan anti-Skyrmion in three spatial dimensions. To our knowledge this is thefirst successful simulation of Skyrmion-anti-Skyrmion annihilation which follows through to the point where the energy is carried by outgoing meson waves. We encounter instabilities similar to those encountered is earlier calculations, but in our case these are not fatal and we are able to simulatethrough this process with a global energy loss of less than 8% and to identify robust features of the final radiation pattern. The system passes through a singular configuration at the time of half-annihilation. This is followed by the onset of fast oscillations which are superimposed on the smoother process which leads to the appearance of outgoing waves peaked at roughly 45 degrees to the incident direction. We investigate the two prominent features of this process: the proliferation of small, fast oscillations and the singular intermediate configuration. We find that our equations of motion allow fur a regime in which the amplitude of certain small perturbations increases exponentially. This regime is similar but not identical to the situation pointed out earlier regarding the original Skyrme model. We argue that the singularity may be seen as the result of a pinch effect similar to that encountered in plasmas.

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Documento generato il 07/04/20 alle ore 21:45:39