5 research outputs found
Conformal Symmetry and the Three Point Function for the Gravitational Axial Anomaly
This work presents a first study of a radiative calculation for the
gravitational axial anomaly in the massless Abelian Higgs model. The two loop
contribution to the anomalous correlation function of one axial current and two
energy-momentum tensors, , is computed
at an order that involves only internal matter fields. Conformal properties of
massless field theories are used in order to perform the Feynman diagram
calculations in the coordinate space representation. The two loop contribution
is found not to vanish, due to the presence of two independent tensor
structures in the anomalous correlator.Comment: 34 pages, 5 figures, RevTex, Minor changes, Final version for Phys.
Rev.
Predictions of SUSY Masses in the Minimal SUSY GUT
The MSSM distinguishes itself from other GUT's by a successful prediction of
many unrelated phenomena with a minimum number of parameters. Among them: a)
Unification of the couplings constants; b)Unification of the masses; c) Proton
decay; d) Electroweak symmetry breaking. A combined fit of the free parameters
in the MSSM to these low energy constraints shows that the MSSM model can
satisfy these constraints simultaneously. From the fitted parameters the masses
of the as yet unobserved superpartners of the SM particles are predicted. The
2nd order QCD coupling constant is required to be between 0.108 and 0.132. It
is shown that a top mass of GeV, as suggested recently by the CDF
Collaboration, constrains the mixing angle between the Higgs doublets in the
MSSM to: 1.2<\tb<5.5 at the 90% C.L.. The most probable value corresponds to
\tb = 1.56, which leads to a stop mass below the top mass. In this case the
stop production in collisions would contribute to the top signature.
This could be an explanation for the large effective cross section
observed by CDF.Comment: latex + eps fig IEKP-KA/94-0