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
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19/9 - 10:40<br />
uantum Group Generalization of the<br />
Heterotic QFT<br />
J.L. Matheus-Valle and Marco A.R. Monteiro<br />
CBPF/CNPq, Rua Dr. Xavier Sigaud, 150<br />
22290 Rio <strong>de</strong> Janeiro, RJ, Brazil<br />
By the use of the generalized Grassmann algebra provi<strong>de</strong>d by Quantum<br />
Groups we introduce a new class of fields in two dimensions which have<br />
<strong>de</strong>formed_ commutation relations. We give the action involving this new<br />
class. of fields and a bosonic scalar field and show that this action has<br />
a symmetry that resembles supersymmetry. We also construct the pathintegral<br />
formalism for this new class of fields and compute the propagator<br />
for them in the context of the q-heterotic-mo<strong>de</strong>l..<br />
19/9 - 10:50<br />
Adolfo P.C. Malbouisson<br />
"Uma prova dlreta da nao-existencla <strong>de</strong>. anomallas em dlmensao. impar"<br />
Com o use <strong>de</strong>-uma tecnica baseada em transformadas<br />
<strong>de</strong>' Mellin, que 1ntroduzlmos anteriormente, slmultaneamente coin<br />
resultados <strong>de</strong> outros autores para. 0 estudo <strong>de</strong> anomalias, a possivel<br />
mostrar diretamente a n&o-existencia <strong>de</strong> uma gran<strong>de</strong> classe <strong>de</strong> anomalias<br />
(incluindo a anomalia axial) em espacoscompactos <strong>de</strong> dimens5o impar.<br />
19/9 - 11A9<br />
POLARIZACAO DO VACUO EM 2+1 DIMENS6ES - Marcelo Mott (Unesp-<br />
campus <strong>de</strong> Guaratinguete) e Arvind Narayan Vaidya (IF/UFRJ)<br />
Nos mostramos que, usando um' espinor a quatro componentes e' uma<br />
representag5o especial 4x4 pars as matrizes gama., as quais.sao compativels coin<br />
a estrutura algebrica do espago-tempo em 3<br />
pars o foton na Eletrodin5mica Quintica.<br />
dimensOes,n5o haver massa gerad.a<br />
- Mostramos tambem que a ac5o efe-v-i'va <strong>de</strong> Euler-Heisenberg para a<br />
EDQ 3 , quando o campo fermiOnico intenage coin o cameo magnetic° externo a uniforme,<br />
n'aci conten o termo <strong>de</strong> Chern-Simon. Para efetuar nossos cilculos noS_uti<br />
lizamos o metodo do tempo prOprio <strong>de</strong>vido a Schwinger.<br />
-39-