9,446 research outputs found
Production of doubly heavy baryons via Higgs boson decays
We systematically analyzed the production of semi-inclusive doubly heavy
baryons (, and ) for the process through four main Higgs decay
channels within the framework of non-relativistic QCD. The contributions from
the intermediate diquark states, ,
, , , and , have been taken into consideration.
The differential distributions and three main sources of the theoretical
uncertainties have been discussed. At the High Luminosity Large Hadron
Collider, there will be about 0.43 events of ,
6.32 events of and 0.28 events of
produced per year. There are fewer events produced at the Circular Electron
Positron Collider and the International Linear Collider, about events of , events of and
events of in operation.Comment: 15 pages, 3 figures, 7 table
One-loop renormalization of the electroweak chiral Lagrangian with a light Higgs
We consider the general chiral effective action which parametrizes the
nonlinear realization of the spontaneous breaking of the electroweak symmetry
with a light Higgs, and compute the one-loop ultraviolet divergences coming
from Higgs and electroweak Goldstone fluctuations using the background field
method. The renormalization of the divergences is carried out through operators
of next-to-leading order in the chiral counting, i.e. of O(p^4). Being of the
same order in power counting, the logarithmic corrections linked to these
divergences can be as important as the tree-level contributions from the O(p^4)
operators, and must be accounted for in the phenomenological analysis of
experimental data. Deviations in the O(p^2) (leading-order) couplings with
respect to the Standard Model values, e.g., in the h->WW coupling, would
generate contributions from the 1-loop chiral logarithms computed in this work
to a vast variety of observables, which do not have a counterpart in the
conventional electroweak effective theory with a linearly transforming Higgs
complex doublet.Comment: 6 page
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