IFIMAR   20926
INSTITUTO DE INVESTIGACIONES FISICAS DE MAR DEL PLATA
artículos
Título:
Constraints on unparticle physics from the gt $\bar{t}$ anomalous coupling.
Autor/es:
O.A. SAMPAYO
Revista:
INTERNATIONAL JOURNAL OF MODERN PHYSICS A
Editorial:
WORLD SCIENTIFIC PUBL CO PTE LTD
Referencias:
Año: 2010 vol. A25 p. 1061 - 1061
ISSN:
0217-751X
Resumen:
We study the impact of unparticle physics to the chromomagnetic dipole moment (CMDM) ofthe top quark. We compute the effect induced by unparticle operators of scalar and vector naturecoupled to fermions on the CMDM. We find that this dipole moment is sensitive to the scaledimensions du of the unparticle and the new couplings of the respective effective operators. Usingthe bounds imposed on the CMDM by low-energy precision and Tevatron measurements we deriveindirect limits on the unparticle parameter space. In particular, we find that the scalar-unparticleoperator contribution fulfills both constraints for most of the unparticle parameter space, whilethe low-energy precision bound on the CMDM excludes a vector-unparticle contribution for lowvalues of respective scale dimension du .
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