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Volume 347 - Corfu Summer Institute 2018 "School and Workshops on Elementary Particle Physics and Gravity" (CORFU2018) - Session: Workshop on the Standard Model and Beyond
Anomalies from Non-Perturbative Standard Model Effects
H.B. Nielsen,* C. Froggatt
*corresponding author
Full text: pdf
Published on: 2019 September 19
We interpret anomalies/deviations from the Standard Model as being in fact due to non-
perturbative effects, because the top-yukawa-coupling is after all so large that non-perturbative
effects become important. Most of the anomalies found have the character of signaling violation
of lepton universality (LUV).
There are four lepton universality violating anomalies known at present, which we shall fit with
one overall scale parameter K to order of magnitude accuracy. One can look at the picture that we
have found - due to the rather strong top-yukawa-coupling - as a new sector of strongly interacting
particles analogous to QCD inside the Standard Model!
In addition we treat what is presumably also an anomaly: the experimental value of the direct CP-
violation parameter ε ′ or ε ′ / ε turns out to be a factor 2 or more larger than the Standard Model
prediction. It can also be fitted well by our model. However if we include in our anomaly model
such processes not involving leptons (but only quarks), it seems superficially that we obtain very
large - and phenomenologically unacceptable - anomalies in K 0 K ̄ 0 etc. mixing. To rescue our
model from this falsification, we think of the interacting quarks as provided with clouds (on 1/2
TeV scale) of, in our picture, the strongly interacting Higgs and top-quark particles, and that too
strongly interacting such clouds cannot penetrate into each other. Thereby the interactions and
thus the resulting anomalies are damped. Even with such a crutch for our theory we only barely
manage to avoid an overlarge anomaly in the indirect CP-violation parameter ε . Our modified
model also predicts an anomalous contribution to the K L − K S mass difference of the same order
of magnitude as the experimental value, which is consistent with the (statistically insignificant)
deviation from the Standard Model lattice value.
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