Dear Oscar, Celine and Michael,
Thank you very much for your comprehensive introductions of your
electroweak effective field theories.
I learned more depth about different aspects of your EFT today.
I have a couple of questions looking forward to your further comments.
Q1. What is the appropriate approach to probe gauge couplings
in a consistent way in inclusive diboson, VBS diboson+jj and triboton
production at hadron colliders?
Celine commented that we don't need energy dependence form factor
to preserve unitary for WW production by considering all dimension 6
operators.
However, Michael use VBS WW+jj production as an example to show that we
need to
introduce s^hat dependent form factor in order to preserve unitarity.
The TGC limit derived in inclusive WW might not be compared to the TGC limit
derived in VBS WW+jet neither Triboson production.
Q2. Could Oscar give us a summary of the coupling constants with
necessary form factor for the Dimension 6 and Dimension8 operators?
To my understanding, we only introduce Dimension 8 operators for neutral
gauge couplings.
Q3. It looks to me VBFNLO, MadGraph5 and Oscar's package all implement
the same effective field theory.
Do I understand it correctly that we should be able to reproduce
the same calculations
from each generator?
Q4. In the end, the TGC/QGC operators are linear expansions of the
effective Lagrangian.
Do I expect the production cross-section can be represented as a
quadratic dependent function
of each gauge coupling coefficients?
Sincerely yours,
Shih-Chieh
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