798 research outputs found
Nuclear targets as a powerful tool in selecting resonant states
No full textIl comportamento delle onde 0-S e 1+S è stato analizzato, studiando la produzione coerente su nucleo di sistemiπ − π − π +. L’esperienza ha avuto luogo all’acceleratore di Serpukov, a 25 e 40 GeV di energia incidente, utilizzando nove diversi bersagli nucleari. L’assorbimento nella materia nucleare dei sistemi mesonici prodotti nel nucleo favorisce i contributi risonanti rispetto al fondo non risonante. In tal modo è stato possibile analizzare la risonanza A1 con un fondo risonante molto ridotto e ottenere evidenza di due nuovi stati risonanti 0-S, che possono essere interpretati come la prima e la seconda eccitazione radiale del pione.The 0-S and 1+S waves have been analysed studying the coherent production ofπ − π − π + states at 25 and 40 GeV/c with nine different nuclear targets. The absorption in nuclear matter of the meson systems, produced within the nucleus, helps in disentangling the resonant states from the nonresonant background. It was so possible to analyse the A1 resonance with a reduced Deck background and to obtain evidence of two new 0-S resonant states, which can be interpreted as the first and the second radial excitations of the pion
Pacs, Sapiehas and the tsar's envoy Vasily Tyapkin: outstanding details
No full textThe article raises the question of the reports of the first Russian resident in the Polish-Lithuanian Commonwealth as an informative source on the history of Lithuania and Belarus, offering new questions in the study of the past of two powerful Lithuanian families. The political preferences and course of action of Krzysztof Zygmunt Pac, the Chancellor of the Grand Duchy of Lithuania, are being clarified, which in most cases acted in the interests of the leader of the “French” party, Jan III Sobieski (70-ies of the 17th century). In addition, an attempt is being made to recreate one of the symbols of the Chancellor's power – an inkwell made of gold and silver. The author also tries to find out when Wysokie Litewskie became the residence of the Grand Treasurer of Lithuania Benedykt Paweł Sapieha, ascertain that the aristocrat stayed in palace in 1677, before its reconstruction was completed. Finally, we analyze the symbolism of the salute at the feast of the Lithuanian Hetman Michał Pac, which included various benevolent symbols. Key words: archival documents, permanent diplomatic mission, Polish-Lithuanian-Russian relations, XVII century
Дослідження наукової спадщини М. С. Бокаріуса — обов’язок працівників наукової установи, що носить його ім’я
Get PDFA significant part of the scientific heritage of M. S. Bokarius, including reports, overviews, and reviews of the works of leading forensic medical examiners and lawyers from around the world has no bibliographic description and has not been put into scientific circulation. Throughout the pages of "Archives of Criminology and Forensic Medicine" and the Ukrainian-language journal: "Issues of Criminalistics and Forensic Science", the scientist reviewed more than 80 research papers. The peculiarity of the Editorial Board of Bokarius "Archives…" was that a significant number of reviews, overviews, etc., was published by the edition.
Mykolai Serhiiovych is an author of more than 70 full-fledged analytical reports; and another 10 in the journal: "Issues of Criminalistics and Forensic Science". The scientist reviewed not only articles, textbooks, monographs by domestic authors, but also research papers of many foreign forensic scientists and criminologists from all over Europe, the USA, Japan, and countries of South America. Reports of scientific articles were reproduced in the journal in French, German and English, Italian and Spanish. All this became possible due to the fact that Mykolai Serhiiovych himself was a gifted linguist and spoke 17 foreign languages.
The Article Purpose is a scientific search for new works by the scientist and a fundamental study of 5 issues of the "Archives of Criminology and ForensicMedicine" published in 1926—1927 and 6 issues of the "Issues of Criminalistics and Forensic Science" journal for 1931.Значна частина наукової спадщини М. С. Бокаріуса залишилася поза увагою бібліографів: зокрема, його рецензії на статті, підручники та монографії вітчизняних авторів, а також на праці закордонних судових медиків, криміналістів і юристів (усього понад 80) 2. Особливістю редакційної політики «Архіву кримінології та судової медицини» і журналу «Питання криміналістики та науково-судової експертизи» була значна кількість рецензій, оглядів та ін. Мета статті полягає в науковому пошуку нових праць М. С. Бокаріуса та фундаментальному дослідженні 5 випусків «Архіву кримінології та судової медицини» за 1926—1927 рр. і журналу «Питання криміналістики та науково-судової експертизи» № 1—6 за 1931 р
The total cross-section of (5pi)-nucleon collision
No full textCoherent 5π production on nine nuclear targets has been studied at 40 GeV incident energy at the Serpukhov accelerator (CERN-Serpukhov experiment No. 5). The collision cross section of the 5π system on the nucleon has been determined in the frame of the Kölbig-Margolis-Glauber model; its value, <10 mb, is definitely lower than the (3π)-nucleon cross section at the same energy
Evidence for new resonances in the systems
No full textPartial-wave analysis has been performed on 120 000 - -+ events coherently produced on nuclear targets in a - beam of 40 GeV/c. Evidence has been found for a 0- S resonance at 1.24 GeV with a width 0.36 GeV. The data also suggest the presence of another 0- S resonance of similar width near 1.8 GeV. These observations can be interpreted as radial excitations of the meson
Determination of ǀVcb☐from the semileptonic decay B0 → D*-l+ν
No full textSemileptonic decays B→ D*-l+νX were selected from a sample of 3.1 million hadronic Z decays collected by the DELPHI detector at LEP. A topological search for semileptonic B decays to resonant and non-resonant D*-π+ states was performed and the ratio of the branching fractions: Br(B → D*-l+νX)/Br(B → D*-+νX) + Br(B0 → + D*-l+ν) = 0.19 ± 0.10(stat) ± 0.06(syst) was determined. Taking into account this contribution, the differential decay width of B0 → D*-l+ν was measured as a function of the momentum transfer from the B to the D*- in two separate analyses, using exclusive and inclusive methods of D*- reconstruction. The distributions were fitted over the full momentum transfer range to extract the product of {pipe}Vcb{pipe} times the normalization of the decay form factor F(q2max): F(q2max){pipe}Vcb{pipe} = (35.4 ± 1.9(stat) ± 2.4(syst)) · 10-3. The value of {pipe}Vcb{pipe} was computed using theoretical calculations of F(q2max), giving: {pipe}Vcb{pipe} = (38.9 ± 2.0(stat) ± 2.6(syst) ± 1.7(theory)) · 10-3. The total branching fraction Br(B0 → D*-l+ν) was determined to be: Br(130, D*-l+v) = (5.52 ± 0.17(stat) ± 0.68(syst))%. © Springer-Verlag 1996
Measurement of the (B)over-bar -> D-(*)pi l(nu)over-bar(l) branching fraction
No full textA study of b semileptonic decays into D, D pi(+/-) and D*pi(+/-) final states is presented. The D-0, D+ and D*(+) mesons are exclusively reconstructed in Z decay data recorded from 1992 to 1995 in the DELPHI experiment at LEP. The overall branching fractions are measured to be: BR(b –> D(0)l(-)<(upsilon)over bar>X-l) = (7.04 +/- 0.34(stat) +/- 0.36 (syst.exp) +/- 0.17(BRD))%, BR(b –> D(+)l(-)<(upsilon)over bar>X-l) = (2.72 +/- 0.19(stat) +/- 0.16(syst.exp) +/- 0.18(BRD))%, BR(b –> D*(+)l(-)<(upsilon)over bar>X-l) = (2.75 +/- 0.17(stat) +/- 0.13 (syst.exp) +/- 0.09 (BRD))%, where the D-0 and D+ results include also contributions from D*(0) and D*(+) decays. A fit to the distribution of the pi(+/-) impact parameter to the primary interaction vertex provides a measurement of the b semileptonic branching fractions into the D(0)pi(+/-)X, D(+)pi(+/-)X and D*(+)pi(+/-)X final states. Assuming that single pion decay modes of B mesons dominate, the partial rates for (B) over bar –> D pi l(-)<(upsilon)over bar>(l) and (B) over bar –> D*pi l(-)<(upsilon)over bar>(l) have been obtained, corresponding to a total branching fraction: BR((B) over bar –> D pi l(-)<(upsilon)over bar>(l)) + BR((B) over bar –> D*pi l(-)<(upsilon)over bar>(l)) = (3.40 +/- 0.52 (stat) +/- 0.32 (syst))%. This result agrees well with the observed difference between the total B semileptonic branching fraction and the sum of the (B) over bar –> Dl(-) upsilon(l) and D* l(-)<(upsilon)over bar>(l) branching fractions. (C) 2000 Elsevier Science B.V. All rights reserved
Analysis of the angular distribution in the pion carbon elastic semicoherent scattering at 40-GeV/c
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