| 1. |
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| 2. |
- Alfs, D., et al.
(författare)
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Drift chamber calibration and particle identification in the P-349 experiment
- 2019
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Ingår i: MESON 2018 - 15th International Workshop on Meson Physics. - : EDP Sciences.
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Konferensbidrag (refereegranskat)abstract
- The goal of the P-349 experiment is to test whether 3.5 GeV/c antiprotons produced in high-energy proton-proton collisions are polarized in view of the preparation of a polarized antiproton beam. In this article, we present the details of the ongoing analysis focused on the drift chambers calibration and particle identification with DIRC.
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| 3. |
- Alfs, D., et al.
(författare)
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Drift Chamber Calibration And Track Reconstruction In The P349 Antiproton Polarization Experiment
- 2017
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Ingår i: Acta Physica Polonica B. - 0587-4254 .- 1509-5770. ; 48:10, s. 1983-1988
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Tidskriftsartikel (refereegranskat)abstract
- The goal of the P349 experiment is to test whether the antiproton production process can be itself a source of antiproton polarization. In this article, we present the motivation and details of the performed measurement. We report on the status of the analysis focusing mainly on calibration of the drift chambers and 3d track reconstruction.
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| 4. |
- Alfs, D., et al.
(författare)
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Status of the analysis for the search of polarization in the antiproton production process
- 2016
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Ingår i: MESON 2016 - 14th International Workshop On Meson Production, Properties And Interaction. - : EDP Sciences.
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Konferensbidrag (refereegranskat)abstract
- The P-349 experiment aims to test whether for antiprotons the production process itself can be a source of polarization in view of the preparation of a polarized antiproton beam. In this article we present the details of performed measurements and report on the status of the ongoing analysis.
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| 5. |
- Grzonka, D., et al.
(författare)
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Polarization analysis of <(p)over bar> produced in pA collisions
- 2019
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Ingår i: MESON 2018 - 15th International Workshop on Meson Physics. - : EDP Sciences.
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Konferensbidrag (refereegranskat)abstract
- A quite simple procedure for the generation of a polarized antiproton beam could be worked out if antiprotons are produced with some polarization. In order to investigate this possibility measurements of the polarization of produced antiprotons have been started at a CERN/PS test beam. The polarization will be determined from the asymmetry of the elastic antiproton scattering at a liquid hydrogen target in the CNI region for which the analyzing power is well known. The data are under analysis and an additional measurement is done in 2018. Details on the experiment and the ongoing data analysis will be given.
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| 6. |
- Grzonka, D., et al.
(författare)
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Search for Polarization Effects in the Antiproton Production Process
- 2015
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Ingår i: Acta Physica Polonica B. - 0587-4254 .- 1509-5770. ; 46:1, s. 191-201
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Tidskriftsartikel (refereegranskat)abstract
- For the production of a polarized antiproton beam, various methods have been suggested including the possibility that antiprotons may be produced polarized which will be checked experimentally. The polarization of antiprotons produced under typical conditions for antiproton beam preparation will be measured at the CERN/PS. If the production process creates some polarization, a polarized antiproton beam could be prepared by a rather simple modification of the antiproton beam facility. The detection setup and the expected experimental conditions are described.
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| 7. |
- Grzonka, D., et al.
(författare)
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Search for polarized antiproton production
- 2019
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Ingår i: Hyperfine Interactions. - : Springer Nature. - 0304-3843 .- 1572-9540. ; 240
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Tidskriftsartikel (refereegranskat)abstract
- The production of antiprotons is studied in view of possible polarization effects as basis for a polarized antiproton beam. If antiprotons are produced with some polarization, a quite simple procedure for the generation of a polarized antiproton beam could be worked out. The experiments are performed at the CERN PS test beam T11 where secondary particles with momenta around 3.5 GeV/c are selected. The polarization analysis is performed by measuring the asymmetry of the elastic (p) over barp-scattering in the Coulomb-nuclear interference region. The detection system includes Cherenkov and tracking detectors for the particle identification and the 3d track reconstruction. Details on the detection system and the status of the analysis are given.
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| 8. |
- Meltzoff, Andrew N., et al.
(författare)
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Eliciting imitation in early infancy
- 2019
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Ingår i: Developmental Science. - : Wiley-Blackwell. - 1363-755X .- 1467-7687. ; 22:2
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)
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| 9. |
- Meltzoff, Andrew N., et al.
(författare)
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Re-examination of Oostenbroek etal. (2016): evidence for neonatal imitation of tongue protrusion
- 2018
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Ingår i: Developmental Science. - : Wiley. - 1363-755X .- 1467-7687. ; 21:4
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Tidskriftsartikel (refereegranskat)abstract
- The meaning, mechanism, and function of imitation in early infancy have been actively discussed since Meltzoff and Moores (1977) report of facial and manual imitation by human neonates. Oostenbroek etal. (2016) claim to challenge the existence of early imitation and to counter all interpretations so far offered. Such claims, if true, would have implications for theories of social-cognitive development. Here we identify 11 flaws in Oostenbroek etal.s experimental design that biased the results toward null effects. We requested and obtained the authors raw data. Contrary to the authors conclusions, new analyses reveal significant tongue-protrusion imitation at all four ages tested (1, 3, 6, and 9 weeks old). We explain how the authors missed this pattern and offer five recommendations for designing future experiments. Infant imitation raises fundamental issues about action representation, social learning, and brain-behavior relations. The debate about the origins and development of imitation reflects its importance to theories of developmental science.
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