XIII Encontro Nacional de FÃÂsica de PartÃÂculas e Campos.pdf
XIII Encontro Nacional de FÃÂsica de PartÃÂculas e Campos.pdf
XIII Encontro Nacional de FÃÂsica de PartÃÂculas e Campos.pdf
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
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 />
- 5 -