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XIII Encontro Nacional de Física de Partículas e Campos.pdf

XIII Encontro Nacional de Física de Partículas e Campos.pdf

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18/9 - 10 :1 0<br />

SOBRE A HIPOTESE DE UM TERMO DE WESS-ZUMINO GENERALIZADO<br />

Alvaro <strong>de</strong> Souza Dutra - UNESP/Campus <strong>de</strong> Guaratingueta- ,DFO<br />

Seguindo um procedimento analogo ao <strong>de</strong> Harada. e. Tsutsui,<br />

propomos a introducIo <strong>de</strong>-um termo <strong>de</strong> Wess-Zumino generalizado.. Em<br />

seguida discutimos as conseq06nclas fisicas da introducIo- <strong>de</strong>. tal<br />

termo. Isto 6 feito atraves do estudo <strong>de</strong> dois exemplos, os mo<strong>de</strong>los<br />

<strong>de</strong> Schwinger vetorial e quiral. A caracteristica mais marcante que.<br />

surge <strong>de</strong>sta hiplobtese 6 o aparecimento <strong>de</strong> excitag6es massivas<br />

<strong>de</strong>pen<strong>de</strong>ntes do calibre. Ao se se fixar convenientemente o calibre,<br />

recuperamos o resultado esperado no caso vetorial, e nos <strong>de</strong>paramos<br />

com uma inesperada fixacIo do valor da massa do boson <strong>de</strong> calibre<br />

no caso quiral.<br />

18/9 - 10:25<br />

SOME NEW EXAMPLES OF SELF-DUAL VORTEX-LIRE CONFIGURATIONS' IN PLANAR GAUGE<br />

THEORIES.<br />

M. E. X. Guimaraes , CBPF-DCP; J.A. Helayel-Neto, CBPF-DCP e UCP-ICEN;<br />

A. William Smith, CBPF-DCP e ICTP-Trieste.<br />

One consi<strong>de</strong>rs 3-dimensional gauge_mo<strong>de</strong>ls,characterised by the presence of a<br />

a Maxwell and a statistical vector potential. The coupling to scalar matter is<br />

analysed, the spectrum after spontaneous symmetry breaking is found out and<br />

conditions on the parameters are imposed so that the Bogomol'nyi-type lower<br />

bound is saturated and self-dual vortices appear as static solutions.<br />

18/9 - 10:40<br />

ESTUDO DO ESPECTRO DE MODELOS DE GAUGE PLANARES COM TERMOS<br />

DE MAXWELL E CHERN-SIMONS'.<br />

O.M.Del Cima, C.B.P.F.-DCP -<br />

Consi<strong>de</strong>ram-se alguns mo<strong>de</strong>los com campos vetoriais <strong>de</strong> materia e <strong>de</strong> gauge com<br />

ossivel relevancia para as teorias <strong>de</strong> gauge supercondutoras <strong>de</strong> Dorey-Mavromatos<br />

Analisam- se os propagadores e <strong>de</strong>terminam-se as condicoes sobre os parametros<br />

ara que o espectro seja livre <strong>de</strong> modos nao-fisicos.<br />

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