Quarkonium production in high-energy reactions is found to exhibit a behaviour more universal than that expected from velocity scaling. Total rates of quarkonia produced in hadronic interactions as well as Feynmanx and transverse momentum distributions can be described over the full range of accessible energies (15 < ∼ √ s < ∼ 1800GeV) by two-stage processes. The quarkonium production cross sec...

The thirteen species of Phaneropterinae here studied can be arranged in four different groups according to their basic karyological traits. All of them share the same kind of chromosomal sex determining mechanism with X0♂ and XX♀. The X chromosome differs among species and always appears heteropycnotic during prophase I, it is the largest in the set and segregates precociously during anaphase I...

A prospective for the inclusive search of the Standard Model Higgs boson in the decay channel H → γγ is presented with the CMS experiment at the LHC. The analysis relies on a strategy to determine the background characteristics and systematics from data. The strategy is applied to a Monte Model of the QCD background, with full simulation of the detector response. The discrimination between sign...

Mapping the recent expansion history of the universe offers the best hope for uncovering the characteristics of the dark energy believed to be responsible for the acceleration of the expansion. In determining cosmological and dark-energy parameters to the percent level, systematic uncertainties impose a floor on the accuracy more severe than the statistical measurement precision. We delineate t...

Although the c. 10,000 species in the Poaceae places it as the fifth largest flowering plant family, a number of biological features raise it to a unique position. The family has contributed crop species that provide about 80% of the annual global food (FAOSTAT 1999). In fact, four of the top crops that feed the world are cereal crops: wheat, rice, corn, and barley. This economic significance i...

In this paper, we study the effects of instrumental systematics on the reconstruction of the deflection angle power spectrum from weak lensing of Cosmic Microwave Background (CMB) temperature and polarization observations. We consider 7 types of effects which are related to known instrumental systematics: calibration, rotation, pointing, spin-flip, monopole leakage, dipole leakage and quadrupol...

iran contains 36 named endemic reptile species in 17 genera and seven families. the most endemic and speciose family is the gekkonidae, followed by the lacertidae. these two families collectively dominate with 22 species (or 60.1%) of the total endemic herpetofauna. twenty one endemics are known only from a single location or restricted area within a single physiographic region. an analysis of ...

the silversides or sand smelts are found in coastal areas of temperate to tropical seas and in fresh water. there are about 14 genera and 68 species with only one native species in the caspian sea basin, atherina caspia . in this review, the systematics, morphology, distribution, biology, economic importance and conservation of the caspian silverside of iran are described, the species is illust...

Lunar Mg-suite norite 78238 was dated using the Sm–Nd, Rb–Sr, and U–Pb isotopic systems in order to constrain the age of lunar magma ocean solidification and the beginning of Mg-suite magmatism, as well as to provide a direct comparison between the three isotopic systems. The Sm–Nd isotopic system yields a crystallization age for 78238 of 4334 ± 37 Ma and an initial e Nd value of 0.27 ± 0.74. T...