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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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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-

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