The production of charged pions in minimum bias p+C interactions is studied using a sample of 377000 inelastic events obtained with the NA49 detector at the CERN SPS at 158 GeV/c beam momentum. The ...data cover a phase space area ranging from 0 to 1.8 GeV/c in transverse momentum and from -0.1 to 0.5 in Feynman xF. Inclusive invariant cross sections are given on a grid of 270 bins per charge, thus offering for the first time a dense coverage of the projectile hemisphere and of the cross-over region into the target fragmentation zone.
New results on the production of charged pions in p+p interactions are presented. The data come from a sample of 4.8 million inelastic events obtained with the NA49 detector at the CERN SPS at 158 ...GeV/c beam momentum. Pions are identified by energy loss measurement in a large TPC tracking system which covers a major fraction of the production phase space. Inclusive invariant cross sections are given on a grid of nearly 300 bins per charge over intervals from 0 to 2 GeV/c in transverse momentum and from 0 to 0.85 in Feynman x. The results are compared to existing data in overlapping energy ranges.
The Eleventh International Foamy Virus Conference took place on 9-10 June 2016 at the Institut Pasteur, Paris, France. The meeting reviewed progress on foamy virus (FV) research, as well as related ...current topics in retrovirology. FVs are complex retroviruses that are widespread in several animal species. Several research topics on these viruses are relevant to human health: cross-species transmission and viral emergence, vectors for gene therapy, development of antiretroviral drugs, retroviral evolution and its influence on the human genome. In this article, we review the conference presentations on these viruses and highlight the major questions to be answered.
Results from NA49 Höhne, C.
Nuclear physics. A,
08/2006, Letnik:
774
Journal Article
Recenzirano
Odprti dostop
An overview of results from the CERN experiment NA49 is presented with emphasis on most recent measurements. NA49 has systematically studied the dependence of hadron production on energy and system ...size or centrality. At top-SPS energy the detailed investigation of hadron production, now also extending to elliptic flow of Λ-baryons and to identified particle yields at high
p
t
, shows that the created matter behaves in a similar manner as at RHIC energies. In the lower SPS energy range a distinct structure is observed in the energy dependence of the rate of strangeness production and in the slopes of
p
t
-spectra suggesting the onset of the creation of a deconfined phase of matter.
Measurements of the level of atomic hydrogen in a 13.56 MHz r.f. plasma were obtained during the deposition of diamond-like carbon (DLC) films. Two techniques were used, firstly multiphoton laser ...induced fluorescence (MPLIF), and secondly a novel combination of Langmuir probe and emission spectroscopy. In the latter technique the data obtained from electron energy distribution functions (EEDFs) and hydrogen emission line intensities were combined using a computer modelling technique to give the atomic hydrogen concentration. This system can potentially be used as a portable atomic hydrogen probe. The results were compared with those obtained using the MPLIF technique which was calibrated using a hydrogen transfer standard. The transfer standard was calibrated by titration. The two techniques were used to measure atomic hydrogen, initially in a hydrogen plasma and subsequently in acetylene-hydrogen containing plasmas during the deposition of DLC films. In conjunction with these measurements, in situ ellipsometry was used to obtain the film thickness, refractive indices and extinction coefficients. A correlation was obtained relating the concentration of atomic hydrogen with the in situ ellipsometry data for films with refractive index between 1.6 and 2.1 (at 675 nm).
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