539 research outputs found
The voluntary intake and digestibility of combinations of cereal crop residues and legume hay for sheep
Examines the effects of supplementing diets based on common Ethiopian crop residues (teff, wheat and oat straws and maize stover) with different proportions of hay made from a common local clover, Triofolium tembense
Biotechnical options
Discusses biological options available for improvement in the productivity of pastoral systems, particularly referring to problems arising from aridity and under-nutrition, and problems of particular systems such as mortality of young stock, bush encroachment, epidemic diseases and management systems
Effect of diet restriction on work performance and weight loss of local Zebu and Friesian X Boran crossbred oxen
Reports results of an experiment conducted to determine the effect of diet restriction on work performance and body weight in crossbred and local oxen worked as singles in farmers' fields around Debre Zeit, Ethiopia, during the normal cultivation season
The effect of supplementing cereal straws with urea, trifolium hay and noug meal on feed intake and liveweight gain of growing crossbred heifers
Compares the effects of noug meal, Trifolium tembense hay and urea, fed in different combinations as supplements to wheat or teff straws, on feed intake and growth rate of crossbred heifers
Productivity and profitability of cattle stall-fed for beef on smallholder farms in Malawi
Presents the results of biological and financial analyses performed on the productivity and profitability of cattle stall-fed for beef on smallholder farms in Malawi
FastJet user manual
FastJet is a C++ package that provides a broad range of jet finding and
analysis tools. It includes efficient native implementations of all widely used
2-to-1 sequential recombination jet algorithms for pp and e+e- collisions, as
well as access to 3rd party jet algorithms through a plugin mechanism,
including all currently used cone algorithms. FastJet also provides means to
facilitate the manipulation of jet substructure, including some common boosted
heavy-object taggers, as well as tools for estimation of pileup and
underlying-event noise levels, determination of jet areas and subtraction or
suppression of noise in jets.Comment: 69 pages. FastJet 3 is available from http://fastjet.fr
How well can the LHC distinguish between the SM light Higgs scenario, a composite Higgs and the Higgsless case using VV scattering channels?
A complete parton level analysis of ll + four jets l = e,mu and 3lv + two
jets production at the LHC is presented, including all processes at order
\ordEW, \ordQCD and \ordQCDsq when appropriate. The infinite Higgs mass
scenario, which is considered as a benchmark for strong scattering theories and
is the limiting case for composite Higgs models, and one example of a model
incorporating a Strongly Interacting Light Higgs are confronted with the
Standard Model light Higgs predictions. This analysis is combined with the
results in the lv + four jets channel presented in a previous paper, in order
to determine whether a composite Higgs signal can be detected as an excess of
events in boson--boson scattering.Comment: Introduced some representative Feynman diagrams. Rearranged section
4. Typos fixed. Published in JHE
Structure of Fat Jets at the Tevatron and Beyond
Boosted resonances is a highly probable and enthusiastic scenario in any
process probing the electroweak scale. Such objects when decaying into jets can
easily blend with the cornucopia of jets from hard relative light QCD states.
We review jet observables and algorithms that can contribute to the
identification of highly boosted heavy jets and the possible searches that can
make use of such substructure information. We also review previous studies by
CDF on boosted jets and its measurements on specific jet shapes.Comment: invited review for a special "Top and flavour physics in the LHC era"
issue of The European Physical Journal C, we invite comments regarding
contents of the review; v2 added references and institutional preprint
number
Towards Jetography
As the LHC prepares to start taking data, this review is intended to provide
a QCD theorist's understanding and views on jet finding at hadron colliders,
including recent developments. My hope is that it will serve both as a primer
for the newcomer to jets and as a quick reference for those with some
experience of the subject. It is devoted to the questions of how one defines
jets, how jets relate to partons, and to the emerging subject of how best to
use jets at the LHC.Comment: 95 pages, 28 figures, an extended version of lectures given at the
CTEQ/MCNET school, Debrecen, Hungary, August 2008; v2 includes additional
discussion in several places, as well as other clarifications and additional
references
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