648 research outputs found
Technicolor Dark Matter
Dark Matter candidates are natural in Technicolor theories. We introduce a
general framework allowing to predict signals of Technicolor Dark Matter at
colliders and set constraints from earth based experiments such as CDMS and
XENON. We show that the associate production of the composite Higgs can lead to
relevant signals at the Large Hadron Collider.Comment: RevTeX, 4 pages, 6 figures. New figure one with added the projected
data for superCDM
125 GeV Higgs from a not so light Technicolor Scalar
Assuming that the observed Higgs-like resonance at the Large Hadron Collider
is a technicolor isosinglet scalar (the technicolor Higgs), we argue that the
standard model top-induced radiative corrections reduce its dynamical mass
towards the desired experimental value. We then discuss conditions for the
spectrum of technicolor theories to feature a technicolor Higgs with the
phenomenologically required dynamical mass. We use scaling laws coming from
modifying the technicolor matter representation, number of technicolors,
techniflavors as well as the number of doublets gauged under the electroweak
theory. Finally we briefly summarize the potential effects of walking dynamics
on the technicolor Higgs.Comment: ReVTex, 15 pages, 3 figures. Version to match the published on
Constraining Walking and Custodial Technicolor
We show how to constrain the physical spectrum of walking technicolor models
via precision measurements and modified Weinberg sum rules. We also study
models possessing a custodial symmetry for the S parameter at the effective
Lagrangian level - custodial technicolor - and argue that these models cannot
emerge from walking type dynamics. We suggest that it is possible to have a
very light spin-one axial vector boson. However, in the walking dynamics the
associated vector boson is heavy while it is degenerate with the axial in
custodial technicolor.Comment: Two columns, RevTex, 4 pages, 5 eps file
The Technicolor Higgs in the Light of LHC Data
We consider scenarios in which the 125 GeV resonance observed at the Large
Hadron Collider is a Technicolor (TC) isosinglet scalar, the TC Higgs. By
comparison with quantum chromodynamics, we argue that the couplings of the TC
Higgs to the massive weak bosons are very close to the Standard Model (SM)
values. The couplings to photons and gluons are model-dependent, but close to
the SM values in several TC theories. The couplings of the TC Higgs to SM
fermions are due to interactions beyond TC, such as Extended Technicolor: if
such interactions successfully generate mass for the SM fermions, we argue that
the couplings of the latter to the TC Higgs are also SM-like.
We suggest a generic parameterization of the TC Higgs interactions with SM
particles that accommodates a large class of TC models, and we perform a fit of
these parameters to the Higgs LHC data. The fit reveals regions of parameter
space where the form factors are of order unity and consistent with data at the
95% CL, in agreement with expectations in TC theories. This indicates that the
discovered Higgs boson is consistent with the TC Higgs hypothesis for several
TC theories.Comment: 26 pages, 8 figure
Minimal Walking Technicolor: Set Up for Collider Physics
Different theoretical and phenomenological aspects of the Minimal and
Nonminimal Walking Technicolor theories have recently been studied. The goal
here is to make the models ready for collider phenomenology. We do this by
constructing the low energy effective theory containing scalars, pseudoscalars,
vector mesons and other fields predicted by the minimal walking theory. We
construct their self-interactions and interactions with standard model fields.
Using the Weinberg sum rules, opportunely modified to take into account the
walking behavior of the underlying gauge theory, we find interesting relations
for the spin-one spectrum. We derive the electroweak parameters using the newly
constructed effective theory and compare the results with the underlying gauge
theory. Our analysis is sufficiently general such that the resulting model can
be used to represent a generic walking technicolor theory not at odds with
precision data.Comment: 42 pages, 3 figures. RevTex forma
Understanding functional benefits of Isoleucine and Arginine on poultry performance and health.
Poultry industry is rapidly moving towards utilizing the best ingredients to precisely feed the birds for better performance, welfare, health, and profitability. One of the practices that evolved over time with research is better optimization of amino acid utilization in the diets thus changing the crude protein landscape. Historically, if we compare the modern diets to diets from 1980, significant changes are visible in the use of unbound or crystalline amino acids leading to reduced levels of CP and reduced unutilized nitrogen in the diets. Multiple feed-grade amino acids are available in a cost-effective manner in poultry diets. Multiple research has been conducted over 80 years to better understand the optimal requirement of lower limiting amino acids in poultry, formulation with digestible amino acid values, and ideal amino acid formulation to achieve precision feeding of nutrients. Those findings enabled the nutritionist to incorporate crystalline amino acids, remove CP minimum, and crystalline amino acid maximum in the diets to lower the feed cost, reduce CP, reduce excess nitrogen in hindgut and improve the health of the birds and improve litter quality (Kidd 2000; Maia et al., 2021). A 1960 diet would only contain the Methionine as synthetic amino acid, whereas the 2023 diet would contain up to 5/6 limiting amino acids in USA-based broiler diets. The 4th, 5th and 6th limiting amino acids in USA-based poultry diets are usually Valine (Val), Isoleucine (Ile) and Arginine (Arg) depending on the ingredients used. With almost 90% of the industry using the 4th limiting amino acid, there is a need to understand the optimal requirement of 5th and 6th limiting amino acids for performance and other biological functionality. With Ile and Arg being the 5th and 6th limiting amino acid in most broiler, turkey, and layer diets, this article will discuss the importance of Ile and Arg in birds and the effect on performance and health
Understanding functional benefits of Isoleucine and Arginine on poultry performance and health.
Poultry industry is rapidly moving towards utilizing the best ingredients to precisely feed the birds for better performance, welfare, health, and profitability. One of the practices that evolved over time with research is better optimization of amino acid utilization in the diets thus changing the crude protein landscape. Historically, if we compare the modern diets to diets from 1980, significant changes are visible in the use of unbound or crystalline amino acids leading to reduced levels of CP and reduced unutilized nitrogen in the diets. Multiple feed-grade amino acids are available in a cost-effective manner in poultry diets. Multiple research has been conducted over 80 years to better understand the optimal requirement of lower limiting amino acids in poultry, formulation with digestible amino acid values, and ideal amino acid formulation to achieve precision feeding of nutrients. Those findings enabled the nutritionist to incorporate crystalline amino acids, remove CP minimum, and crystalline amino acid maximum in the diets to lower the feed cost, reduce CP, reduce excess nitrogen in hindgut and improve the health of the birds and improve litter quality (Kidd 2000; Maia et al., 2021). A 1960 diet would only contain the Methionine as synthetic amino acid, whereas the 2023 diet would contain up to 5/6 limiting amino acids in USA-based broiler diets. The 4th, 5th and 6th limiting amino acids in USA-based poultry diets are usually Valine (Val), Isoleucine (Ile) and Arginine (Arg) depending on the ingredients used. With almost 90% of the industry using the 4th limiting amino acid, there is a need to understand the optimal requirement of 5th and 6th limiting amino acids for performance and other biological functionality. With Ile and Arg being the 5th and 6th limiting amino acid in most broiler, turkey, and layer diets, this article will discuss the importance of Ile and Arg in birds and the effect on performance and health
Bordetella Holmesii: An Unusual Cause of Endogenous Endophthalmitis in a Patient With Sickle Cell Disease
Purpose:
This case report describes a rare organism causing endogenous endophthalmitis in a patient with sickle cell disease.
Methods:
A case report was conducted.
Results:
A 41-year-old man with sickle cell disease presented with acute onset of blurry vision of the right eye. His visual acuity was counting fingers in the right eye and 20/20 in the left eye. He had ophthalmic findings of hypopyon and vitritis in the right eye, consistent with endophthalmitis. He was treated with intravitreal and systemic antibiotics. Vitreous cultures grew Bordetella holmesii. His visual acuity at follow-up visits improved to 20/40 in the setting of improved vitritis.
Conclusions:
This is the first case describing B holmesii, a rare causative organism of endogenous endophthalmitis, in a patient with sickle cell disease. More studies are needed to improve the early detection and treatment of this unusual organism
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