@misc{10481/63958,
year = {2020},
month = {9},
url = {http://hdl.handle.net/10481/63958},
abstract = {The most salient generic feature of a composite
Higgs boson resides in the nonlinearity of its dynamics,
which arises from degenerate vacua associated with
the pseudo-Nambu–Goldstone (PNGB) nature of the Higgs
boson. It has been shown that the nonlinear Higgs dynamics
is universal in the IR and controlled only by a single parameter
f , the decay constant of the PNGB Higgs. In this work
we perform a fit, for the first time, to Wilson coefficients
of O(p4) operators in the nonlinear Lagrangian using the
golden H→4L decay channel. By utilizing both the “rate”
information in the signal strength and the “shape” information
in the fully differential spectra, we provide limits on the
Goldstone decay constant f , as well as O(p4) Wilson coefficients,
using Run 2 data at the LHC. In rate measurements
alone, the golden channel prefers a negative ξ = v2/ f 2 corresponding
to a non-compact coset structure. Including the
shape information, we identify regions of parameter space
where current LHC constraint on f is still weak, allowing
for ξ   0.5 or ξ   −0.5. We also comment on future sensitivity
at the high-luminosity upgrade of the LHCwhich could
allow for simultaneous fits to multiple Wilson coefficients.},
organization = {United States Department of Energy (DOE)

DE-AC02-06CH11357
DE-SC0010143},
organization = {MINECO (ERDF) 	
FPA 2016-78220-C3-1-P
FPA 2013-47836-C3-2/3-P},
organization = {Juan de la Cierva program},
organization = {Junta de Andalucía

FQM-101},
publisher = {Springer},
title = {A golden probe of nonlinear Higgs dynamics},
doi = {10.1140/epjc/s10052-020-8244-8},
author = {Liu, Da and Low, Ian and Vega Morales, Roberto Omar},
}