One-loop $W_LW_L$ and $Z_LZ_L$ scattering from the electroweak Chiral Lagrangian with a light Higgs-like scalar - INSPIRE

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One-loop $W_LW_L$ and $Z_LZ_L$ scattering from the electroweak Chiral Lagrangian with a light Higgs-like scalar

Rafael L. Delgado
(
- Madrid U.
)
,
Antonio Dobado
(
- Madrid U.
)
,
Felipe J. Llanes-Estrada
(
- Madrid U.
)

Nov 23, 2013

31 pages

Published in:

JHEP 02 (2014) 121

Published: 2014

e-Print:

1311.5993 [hep-ph]

DOI:

10.1007/JHEP02(2014)121

View in:

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Abstract: (arXiv)

By including the recently discovered Higgs-like scalar

\varphi

in the Electroweak Chiral Lagrangian, and using the Equivalence Theorem, we carry out the complete one-loop computation of the elastic scattering amplitude for the longitudinal components of the gauge bosons

V=W, Z

at high energy. We also compute

\varphi\varphi \rightarrow \varphi\varphi

and the inelastic process

VV\rightarrow \varphi\varphi

, and identify the counterterms needed to cancel the divergences, namely the well known

a_4

and

a_5

chiral parameters plus three additional ones only superficially treated in the literature because of their dimension 8. Finally we compute all the partial waves and discuss the limitations of the one-loop computation due to only approximate unitarity.

Note:

28 pages, 19 plots, 9 Feynman-diagram sets This version revised and accepted in JHEP

Beyond Standard Model
Chiral Lagrangians
Spontaneous Symmetry Breaking
Scattering Amplitudes
effective Lagrangian: chiral
electroweak interaction
equivalence theorem
W: longitudinal
W W: scattering
Z0: longitudinal

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