850 research outputs found
Flavor Structure of the Nucleon Sea
We review the current status and future prospects on the subject of flavor
structure of the nucleon sea. The flavor structure of the nucleon sea provides
unique information on the non-perturbative aspects of strong interactions
allowing stringent tests of various models on the partonic structures of the
nucleons as well as lattice QCD calculations. The scope of this review covers
the unpolarized, polarized, and the transverse-momentum dependent sea-quark
distributions of the nucleons. While the main focus of this review is on the
physics motivation and recent progress on the subject of the nucleon sea, we
also discuss future prospects of addressing some outstanding issues on the
flavor structure of the nucleon sea.Comment: 61 pages and 36 figures; published versio
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Working Hours Reduction and Endogenous Growth
This paper formulates an endogenous growth model and uses it to inquire into the long-run impact of work-sharing arrangements on economic growth. We show that the styles of wage contract, namely salary-style and hourly-style contracts, are a key factor in determining the long-run growth effects of working time reduction. If the labor market is overwhelmingly salaried arrangement, then the extent of wage flexibility is relatively low; as a consequence, a policy of reducing working hours will deteriorate economic growth. On the contrary, if hourly pay predominates, then the wage system tends to increase the degree of wage flexibility. Thus, a cut in working time may favor the economy’s growth rate.Working hours reduction, Endogenous growth
Interpretation of Angular Distributions of -boson Production at Colliders
High precision data of dilepton angular distributions in
production were reported recently by the CMS Collaboration covering a broad
range of the dilepton transverse momentum, , up to GeV.
Pronounced dependencies of the and parameters,
characterizing the and angular distributions, were
found. Violation of the Lam-Tung relation was also clearly observed. We show
that the dependence of allows a determination of the relative
contributions of the annihilation versus the Compton process.
The violation of the Lam-Tung relation is attributed to the presence of a
non-zero component of the axis in the direction normal to the
"hadron plane" formed by the colliding hadrons. The magnitude of the violation
of the Lam-Tung relation is shown to reflect the amount of this
`non-coplanarity". The observed dependencies of and from
the CMS and the earlier CDF data can be well described using this approach.Comment: 5 pages, 3 figure
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