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1. Functioning of the verb’s reflexive voice in the modern Udmurt language

Author: Ksenia G. Kostina
Subjects: udmurt language, udmurt grammar, finno-ugric languages, verb, category of voice, reflexive voice, Philology. Linguistics, P1-1091
Abstract: Introduction. Any language’s verb system has many resources for denoting various actions of people. The relations of the action or state of the subject to its object are determined by the grammatical category of the voice, represented in the Udmurt language by the pairs of causative – non-causative, reflexive – non-reflexive forms of voices. The article considers the functioning of the verb’s reflexive voice in the modern Udmurt language, including the etymology of the voice’s affix, the grammatical meanings of reflexive verbs. Materials and Methods. The main material of the research is based on the Udmurt-Russian Dictionary (2008) and the texts of Udmurt writers included into the National Corpus of the Udmurt Language. The article used a set of such research methods as descriptive, continuous sampling, contextual analysis, taking into account the situational conditioning of the verb voice. On specific examples, the use of these methods makes it possible to consider the structure, dynamics and features of the functioning of the reflexive voice of the verb in the Udmurt language. Results and Discussion. As a result of the research, for the first time, among the reflexive voice’s groups we include verbs of passive voice. The reason of it is the low probability of using passive constructions in colloquial speech. The frequent cases of using passive meanings of verbs in the literature and in the press are defined by the calcified translation of foreign-language constructions. Conclusion. The grammatical structure of the Udmurt language is represented by two binary voice’s forms: reflexive/non-reflexive voice and causative/non-causative voice. Specific indicators of reflexive voice are affixes -ськ(ы)-/-ск(ы), -иськ(ы)-/-üськ(ы)-. From the point of view of semantic content, five semantic groups of returnable pledges are distinguished: reflexive, medial, reciprocal, impersonal, passive. The proposed classification is determined by the specifics of the relations between the subject and the object of action.
Published: 2021
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2. Functional dairy products enriched with plant ingredients

Author: Stanislav A. Sukhikh, Lidiia A. Astakhova, Yuliya V. Golubcova, Andrey A. Lukin, Elizaveta A. Prosekova, Irina S. Milent`eva, Natalia G. Kostina, and Aleksandr N. Rasshchepkin
Subjects: Milk drinks, plant extracts, functional ingredients, biologically active substances, Food processing and manufacture, TP368-456
Abstract: Milk and dairy products are staple foods in the diet of all social groups. Plant additives are of multifunctional use in the dairy industry. Wild plants are a source of vitamins, minerals, and other biologically active substances. Due to these compounds, they improve digestion, cardiovascular activity, and emotional state. This review describes the latest trends in creating functional milk drinks enriched with plant components. They include drinks based on whole milk and cream, dairy by-products (whey, buttermilk), as well as fermented milk drinks with probiotic cultures (kefir, drinking yogurt). We found that aqueous extracts were most commonly introduced into milk raw materials. Fruits and berries were dried and added to milk raw materials in the powder form. Special attention was paid to ‘hairy roots’ as a promising technology for producing various functional foods. In addition to being economically viable, this technology can help us expand the range of plant materials with endangered species. Functional milk-based drinks enriched with plant extracts can improve the immune system and be used as part of supportive therapy. They are also suitable for daily use to replenish the balance of essential nutrients. These properties make their production a promising direction in the dairy industry.
Published: 2019
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3. History of study of the grammatical category of the voice in the Udmurt linguistics

Author: K. G. Kostina and N. V Kondratyeva
Subjects: Linguistics and Language, History, History and Philosophy of Science, Anthropology, Grammatical category, Psychology, Language and Linguistics, Linguistics
Abstract: Introduction: the article is devoted to the study of the concepts of voice’s issues in Udmurt linguistics. The author traces the history and development of the voice forms of verbal units. Objective: to systematize and summarize the historical process of formation and universalization of scientific research in the field of study of the category of the voice of the Udmurt language. Research materials: the empirical basis of the study was the variety of approaches to the study of the voice category in the scientific research of linguists of different eras. Results and novelty of the research: based on the peculiarities of the development of methodological principles and attitudes in the study of the voice forms of the Udmurt verb, it is proposed to distinguish three stages of the study: a) the first stage (from the second half of the XVIII century to 1851) is characterized by the definition of terminology for the voice forms and their grammatical expression. The second stage (from 1851 to 1957) is characterized by a closer attention to the semantic aspect of language phenomena and to the development of terminology in the Udmurt language. A deep scientific understanding of the voice forms of the Udmurt verb began at the third stage (from 1957 to the present). During this period the structural-semantic principle dominates in the study of the considered grammatical category, providing for equal attention to the structure and semantics of a verbal unit. The scientific novelty of the work lies in the first experience of description of history and current state of the study of the question of voice in Udmurt linguistics, which opens up new prospects for the study of subject-object relations in the speech activity of a native speaker
Published: 2021
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4. Сationic carboxamide derivatives of tricyclic heteroaromatic compounds: synthesis and preliminary evaluation of antiproliferative activity

Author: I. V. Alexeeva, N. A. Lysenko, V. V. Negrutska, V. G. Kostina, and Igor Dubey
Subjects: chemistry.chemical_classification, chemistry, 010405 organic chemistry, medicine.drug_class, Stereochemistry, medicine, Carboxamide, 010402 general chemistry, 01 natural sciences, 0104 chemical sciences, Tricyclic
Abstract: This research was aimed at the synthesis and study of biological activity of the carboxamides of tricyclic heteroaromatic systems, acridone, phenazine and thioxanthone, containing the aliphatic and aromatic cationic substituents at amide fragment. These heterocyclic cores are DNA intercalating agents, whereas the introduction of cationic groups provides additional ionic interactions of the ligands with their biological targets, such as DNA and enzymatic complexes of the system of nucleic acids biosynthesis. A convenient way of the introduction of such groups is a modification of heterocyclic carboxamides. A small library of new cationic amide derivatives of acridone-4-, phenazine-1- and thioxanthone-4-carboxylic acids was obtained. They were synthesized in 37-81% yield by mild and selective quaternization of the nitrogen atoms at N,N-dimethylaminoalkyl (alkyl = ethyl, propyl) and pyridylmethyl fragments of the neutral N-functionalized carboxamides with methyl iodide. Tricyclic heteroaromatic cores were not affected. Convenient protocol for the synthesis of thioxanthone-4-carboxylic acid (TCA) based on the reaction of 2-mercaptobenzoic and 2-iodobenzoic acids followed by cyclization of the intermediate was developed (yield 79%). A series of new N-functionalized neutral amides of TCA, the precursors of corresponding cationic carboxamide, were also obtained via the reaction of acyl chloride with amines. Preliminary in vitro testing of four compounds as potential antitumor agents in U87MG tumor cell culture (human malignant glioma) demonstrated their significant antiproliferative activity at low micromolar concentrations, with growth inhibition values GI50 in the range 1.7-11 µM. These results suggest that cationic carboxamides of tricyclic heteroaromatic systems are promising scaffolds for the design of new antitumor drugs.
Published: 2020
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5. The effect of low-temperature processing of semi-finished potatoes on the ascorbic acid content

Author: R Z Grigorieva, N G Kostina, T V Podlegaeva, and D V Shalimova
Abstract: In Russia, only 2% of grown potatoes are processed, while in Western countries this figure exceeds 50%. In the food industry the use of potatoes in processed form (various semifinished products) has a number of advantages as compared to fresh potatoes. It is established that the range of processed potato products is expanding every year, however, one of the most popular types of semi-finished products from potatoes are those subjected to low-temperature processing. In this regard, the change in the content of ascorbic acid in semi-finished potato products during freezing and storage was studied. After examining the chemical composition of five varieties of potatoes grown in the Kemerovo region the “Rikeya” variety was selected. Freezing of the potatoes was carried out at temperatures of -24ºC and -40ºC with natural, as well as forced convection with an air velocity of 1.25 and 2.5 m/s. The resulting frozen semifinished products were stored for 25 days at temperatures of -12ºC, -18ºC, -24ºC. It was found that the temperature of freezing and storage, as well as air velocity during freezing, significantly affect the preservation of vitamin C in semi-finished potatoes. The determining factor contributing to the preservation of the processed potatoes’ quality is the temperature regimes of freezing and storage – the smaller the difference of these temperatures, the less the loss of ascorbic acid.
Published: 2022
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6. Telomerase inhibition by new di- and trisubstituted acridine derivatives

Author: N. A. Lysenko, I. V. Saraieva, I. Ya. Dubey, I. V. Alexeeva, V. G. Kostina, and V. V. Negrutska
Subjects: Telomerase inhibition, QH301-705.5, 010405 organic chemistry, Chemistry, Stereochemistry, Short Communications, Acridine derivatives, QH426-470, 010402 general chemistry, 01 natural sciences, acridines, General Biochemistry, Genetics and Molecular Biology, TRAP, 0104 chemical sciences, telomerase inhibitors, Genetics, quadruplex DNA, Biology (General)
Abstract: Aim. To study a series of new acridine derivatives containing two basic fragments able to bind to quadruplex DNA at C-4 and C-9 positions as potential telomerase inhibitors. Methods. TRAP assay was used to determine the activity of compounds in vitro. Results. A number of acridines inhibiting the enzyme at micromolar concentrations were found, with IC₅₀ = 2.6 µM for the most active compound. Conclusions. The introduction of a highly basic N,N-dimethylaminoalkyl group at the C-9 position of the acridine core results in a strong increase of biological activity of compounds, and a 5-methyl substituent further enhances it. Мета. Дослідити серію нових похідних акридину, що містять у положеннях С-4 і С-9 два основні фрагменти, здатні зв’я-зу-ва-ти-ся з квадруплексною ДНК, як потенційних інгібіторів теломерази. Методи. Для визначення активності сполук in vitro вико-ристано метод TRAP. Результати. Виявлено ряд акридинів, що інгібують фермент у низьких мікромолярних концентраціях, для найактивнішого з яких ІС₅₀ = 2.6 мкМ. Висновки. При введенні високоосновної N,N-диметиламіноалкільної групи в положення С-9 акридинового ядра біологічна активність сполук різко зростає, а 5-метильний замісник додатково збільшує її. Цель. Изучить серию новых производных акридина, содержащих в положениях С-4 и С-9 два основных фрагмента, способных связываться с квадруплексной ДНК, как потенциальных ингибиторов теломеразы. Методы. Для определения активности веществ in vitro использован метод TRAP. Результаты. Обнаружен ряд акридинов, ингибирующих фермент в низких микромоляных концентрациях, для самого активного из которых ІС₅₀ = 2.6 мкM. Выводы. При введении высокоосновной N,N-диметиламиноадкильной группы в положении С-9 акридинового ядра биологическая активность соединений резко возрастает, а 5-метильный заместитель дополнительно увеличивает ее.
Published: 2016
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7. Innovative Resource Dynamics in Pedagogical Higher Educational Institution

Author: E. A. Martynova, E. N. Chekushkina, E. N. Rodina, and R. G. Kostina
Subjects: Resource (biology), Knowledge management, 010308 nuclear & particles physics, business.industry, General Arts and Humanities, 05 social sciences, 050109 social psychology, Educational institution, 01 natural sciences, Dynamics (music), 0103 physical sciences, 0501 psychology and cognitive sciences, Sociology, business
Published: 2016
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8. Evaluation of antibacterial and antiviral activity of N-arylamides of 9-methyl and 9-methoxyphenazine-1-carboxylic acids – inhibitors of the phage T7 model transctiption

Author: O. M. Deriabin, L. G. Palchykovska, S. L. Rybalko, M. M. Babkina, S. P. Samijlenko, V. G. Kostina, Dmytro M. Hovorun, O. V. Vasylchenko, O. A. Tarasov, M. O. Platonov, and D. B. Starosyla
Subjects: antibacterial activity, Chemistry, model system of the DNA-dependent RNA-polymerase of phage T7, QH301-705.5, N-arylamides 9-substituted PCA, antiviral activity, Genetics, Biology (General), QH426-470, Antibacterial activity, Combinatorial chemistry, General Biochemistry, Genetics and Molecular Biology
Abstract: Aim. Search for compounds with antibacterial and antiviral properties among N-arylamides of 9-substituted phenazine-1-carboxylic acids (PCA), inhibitors of the RNA synthesis. Methods. Influence of N-aryl-amides on the RNA synthesis was tested in vitro in the model system of the DNA-dependent RNA polymerase of phage T7 (T7 RNAP). Antimicrobial activities of the N-arylamides against bacteria Erysipelothrix rhusiopathiae VR-2 var. IVM, Klebsiella spp. and Escherichia coli ATCC25922 were investigated by the method of two-fold dilution in a liquid medium. Antiviral effects against Bovine Viral Diarrhea Virus (BVDV) and cytotoxicity of the N-arylamides were evaluated using Madin-Darby bovine kidney (MDBK) cells. Results. Twenty N-arylamides appeared to be efficacious inhibitors of the RNA synthesis at concent- rations of 0.48–61 µМ. The compound 16 proved to be the most effective inhibitor of T7 RNAP with the IC50 value being 0.48 µМ. Fourteen N-arylamides demonstrated antibacterial properties against gram positive and gram negative bacteria at the 0.1–10 µg/ml concentrations. A number of the N-arylamides revealed a multiplicity of their antimicrobial actions: 7 compounds against two bacteria and two compounds, 2 and 3, against three bacteria investigated. N-arylamides 16 and 26 showed high inhibitory activity as to BVDV with the IC50 values 0.43 and 0.88 µg/ml and SI values 160 and 10 correspondingly. Conclusions. The obtained data evidence that the most likely targets of the N-arylamides 9-substituted PCA in bacteria and viruses are their RNA synthesizing complexes.
Published: 2012

9. Dynamics of Switching Waves in a Nanofluid in a Light Field

Author: A Livashvili, G Kostina, V Krishtop, N Kireeva, and P Vinogradova
Subjects: Materials science, Nanofluid, Thermal conductivity, Electrostriction, Thermal, Mechanics, Polarization (waves), Thermal conduction, Thermophoresis, Light field
Abstract: The dynamics of the concentration of nanofluids placed in a light field with a Gaussian intensity profile is studied theoretically. The investigation is based on the analytical and numerical solutions of the system of linearized heat conduction and convectiondiffusion equations. The convection-diffusion equation contains terms that correspond both to the Soret effect and to the transfer of nanoparticles, caused by the action of a light field on them (electrostriction). The dependence of the coefficient of thermal conductivity of the medium on the concentration is taken into account. It is shown that under these conditions single travelling waves appear in the medium, the velocity of which depends not only on the thermal physical parameters of the medium, but also on the polarization of the particles. Conditions under which the stratification of the medium is possible are found.
Published: 2018
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10. New acridone-4-carboxylic acid derivatives as potential inhibitors of Hepatitis C virus infection

Author: Anna Stankiewicz-Drogoń, Larisa G. Palchykovska, Anna M. Boguszewska-Chachulska, V. G. Kostina, I. V. Alexeeva, and A. D. Shved
Subjects: Hepatitis C virus, Clinical Biochemistry, Carboxylic Acids, Pharmaceutical Science, Hepacivirus, Virus Replication, medicine.disease_cause, Antiviral Agents, Biochemistry, Inhibitory Concentration 50, Structure-Activity Relationship, chemistry.chemical_compound, Transcription (biology), Drug Discovery, medicine, RNA Viruses, T7 RNA polymerase, Fluorometry, Enzyme Inhibitors, Molecular Biology, Subgenomic mRNA, chemistry.chemical_classification, biology, Organic Chemistry, Helicase, DNA-Directed RNA Polymerases, Acridone, Enzyme, chemistry, biology.protein, Nucleic acid, Molecular Medicine, RNA Helicases, Acridones, medicine.drug
Abstract: A new class of compounds—acridone derivatives—was tested using the direct fluorometric helicase activity assay to determine the inhibitory properties of the derivatives towards the NS3 helicase of Hepatitis C virus (HCV). The compounds were also tested as putative transcription inhibitors of in vitro transcription based on the DNA-dependent T7 RNA polymerase. Most of the acridone derivatives tested were transcription inhibitors; however, only four of them inhibited the NS3 helicase at low concentrations (IC 50 from 3 μM to 20 μM) and were therefore selected for further studies on the mechanism of inhibition. The acridone derivatives probably act via intercalation into double-stranded nucleic acids but they may also interact directly with viral enzymes. Selected carboxamides were tested in the subgenomic HCV replicon system. Two of the compounds: N -(pyridin-4-yl)-amide and N -(pyridin-2-yl)-amide of acridone-4-carboxylic acid are efficient RNA replication inhibitors with selectivity indexes of 19.4 and 40.5, respectively, proving that the acridone derivatives may be regarded as potential antiviral agents.
Published: 2008
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11. Tricyclic 1,2,4-triazine bearing heterosystem: directed synthesis of new bioactive compounds

Author: V. G. Kostina, L. S. Usenko, L. G. Palchikovs'ka, and I. V. Alexeeva
Subjects: chemistry.chemical_classification, chemistry.chemical_compound, Glycosylation, chemistry, Stereochemistry, Glycoside, General Biochemistry, Genetics and Molecular Biology, Triazine, Tricyclic
Abstract: A new se ries of tricyclic heteroaromatic com pounds was pre pared by cyclization of N2-sub sti tuted-6-bromo-3-oxo(amino)-1,2,4-tri azin-5(4I)-ones with 2-aminobenzothiol. The struc ture of bioactive tricyclic glycosides, ob tained ear lier by the sim pli fied silylic method, was con firmed as well as ex pe di ence and ad e quacy of this method for di rected glycosylation of triazine bear ing tricyclic bases.
Published: 2008
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12. Search for novel antifungal compounds among arylamides of 1,2,4-triazinyl-6-propanecarboxylic acid

Author: M. O. Platonov, L. V. Pavlenko, A. D. Shved, N. A. Lysenko, I. V. Alexeeva, V. G. Kostina, and L. G. Palchikovskaya
Subjects: Antifungal, Chemistry, medicine.drug_class, medicine, Organic chemistry, General Biochemistry, Genetics and Molecular Biology
Published: 2007
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13. 5-Aminosubstituted triazine nucleosides and their furanidylic analogues: synthesis and primary screening on tumor cell models

Author: L. S. Usenko, L. G. Palchikovs'ka, V. G. Kostina, and I. V. Alexeeva
Subjects: chemistry.chemical_compound, Stereochemistry, Chemistry, Tumor cells, General Biochemistry, Genetics and Molecular Biology, Triazine, Primary screening
Published: 2005
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14. New 6-azauracil derivatives – amides of as-triazine carbon acids: their synthesis and antimicrobial activity

Author: L. I. Palchikovskaya, I. V. Alexeeva, M. O. Platonov, V. G. Kostina, L. S. Usenko, S. N. Harchenko, E. V. Baschta, V. A. Malko, and N. A. Lysenko
Subjects: chemistry.chemical_compound, Chemistry, Organic chemistry, chemistry.chemical_element, Antimicrobial, Carbon, General Biochemistry, Genetics and Molecular Biology, Triazine
Published: 2002
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15. A search for the electric dipole moment of the τ-lepton

Author: H. Albrecht, T. Hamacher, R.P. Hofmann, T. Kirchhoff, R. Mankel, A. Nau, S. Nowak, D. Reßing, H. Schröder, H.D. Schulz, M. Walter, R. Wurth, C. Hast, H. Kapitza, H. Kolanoski, A. Kosche, A. Lange, A. Lindner, M. Schieber, T. Siegmund, H. Thurn, D. Töpfer, D. Wegener, C. Frankl, J. Graf, M. Schmidtler, M. Schramm, K.R. Schubert, R. Schwierz, B. Spaan, R. Waldi, K. Reim, H. Wegener, R. Eckmann, H. Kuipers, O. Mai, R. Mundt, T. Oest, R. Reiner, A. Rohde, W. Schmidt-Parzefall, J. Stiewe, S. Werner, K. Ehret, W. Hofmann, A. Hüpper, K.T. Knöpfle, J. Spengler, P. Krieger, D.B. MacFarlane, J.D. Prentice, P.R.B. Saull, K. Tzamariudaki, R.G. Van de Water, T.-S. Yoon, M. Schneider, S. Weseler, M. Bračko, G. Kernel, P. Križan, E. Križnič, G. Medin, T. Podobnik, T. Živko, V. Balagura, S. Barsuk, I. Belyaev, R. Chistov, M. Danilov, V. Eiges, L. Gershtein, Yu. Gershtein, A. Golutvin, O. Igonkina, I. Korolko, G. Kostina, D. Litvintsev, P. Pakhlov, S. Semenov, A. Snizhko, I. Tichomirov, and Yu. Zaitsev
Subjects: Systematic error, Physics, Nuclear and High Energy Physics, Particle physics, Argus, 010308 nuclear & particles physics, FOS: Physical sciences, Observable, 01 natural sciences, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), Dipole, Electric dipole moment, 0103 physical sciences, CP violation, 010306 general physics, computer, Storage ring, Lepton, computer.programming_language
Abstract: Using the ARGUS detector at the e+e- storage ring DORIS II, we have searched for the real and imaginary part of the electric dipole formfactor d_tau of the tau lepton in the production of tau pairs at q^2=100 GeV^2. This is the first direct measurement of this CP violating formfactor. We applied the method of optimised observables which takes into account all available information on the observed tau decay products. No evidence for CP violation was found, and we derive the following results: Re(d_tau)=(1.6+-.9)*10^(-16) ecm and Im(d_tau)=(-0.2+-0.8)*10^(-16) ecm, where statistical and systematic errors have been combined., 8 pages, 5 figures (10 subfigures)
Published: 2000
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16. Study of iodination mechanism of 5'-O-prolecled pyrimidine Hucleosides in Arbuzov reaction conditions

Author: V. G. Kostina, L. S. Usenko, A. S. Shalamay, and V. A. Gladkaya
Subjects: Reaction conditions, chemistry.chemical_compound, Pyrimidine, chemistry, Halogenation, Photochemistry, General Biochemistry, Genetics and Molecular Biology, Mechanism (sociology)
Published: 1998
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17. Evidence for Λc(2593)+ production

Author: D. O. Litvintsev, R. Mundt, C. Frankl, B. Spaan, H. Thurn, Ruslan Chistov, P. Pakhlov, V. Eiges, R. Waldi, R. P. Hofmann, P. R.B. Saull, D. B. MacFarlane, Sebastian Nowak, D. Wegener, J. Spengler, T. Siegmund, A. Snizhko, W. Schmidt-Parzefall, T. Oest, M. Schramm, H. Kapitza, H. Kuipers, A. Nau, I. Korolko, Michael Schneider, Holger Schulz, Peter Krieger, Sergey Semenov, M. Bracko, G. Kernel, Hermann Kolanoski, H. Wegener, S. Weseler, T. Živko, H. Schröder, T. S. Yoon, R. Schwierz, T. Podobnik, G. Medin, O. Igonkina, Klaus R. Schubert, K. T. Knöpfle, Ivan Belyaev, L. Gershtein, Sergey Barsuk, J.D. Prentice, A. Lindner, M. Schieber, C. Hast, Thomas Hamacher, S. Werner, J. Graf, K. Tzamariudaki, D. Töpfer, A. Lange, M. Walter, R. G. Van de Water, O. Mai, A. Rohde, R. Eckmann, Yu. Zaitsev, K. Reim, H. Albrecht, R. Mankel, R. Wurth, T. Kirchhoff, E. Križnič, P. Križan, A. Golutvin, Yu. Gershtein, J. Stiewe, D. Reßing, I. Tichomirov, M. Schmidtler, A. Hüpper, Vladislav Balagura, Mikhail Danilov, A. Kosche, Werner Hofmann, K. Ehret, G. Kostina, and R. Reiner
Subjects: Baryon, Physics, Nuclear and High Energy Physics, Argus, Electron–positron annihilation, Excited state, DESY, Atomic physics, computer, computer.programming_language
Abstract: Using the ARGUS detector at the e+e− storage ring DORIS II at DESY, we have found evidence for the production of the excited charmed baryon state Λc(2593)+ in the channel Λc+π+π−. Its mass was determined to be (2594.6±0.9±0.4) MeV/c2, and the natural width measured to be Γ = (2.9−2.1−1.4+2.9+1.8) MeV. The production cross section times the branching ratios of σ(e+e− → Λc(2593)+X) × Br(Λc(2593)+ → Λc+π+π−) × Br(Λc+ → pK−π+) was measured to be (0.25−0.13+0.24 ±0.13) pb. The fractions of Λc(2593)+ decays proceeding through the Σc0π+ and Σc++π− channels were determined to be 0.29±0.10±0.11 and 0.37±0.12±0.13, respectively.
Published: 1997
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18. Recyclizalion of O2,2'-cyclopyrimidinnucleosicies with the use of haloid derivatives of threevalent phosphor and quasiphosphonic sails

Author: V. G. Kostina, A. S. Shalamay, L. S. Usenko, and V. A. Gladkaya
Subjects: Chemistry, Inorganic chemistry, Phosphor, General Biochemistry, Genetics and Molecular Biology
Published: 1997
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19. Synthesis of 2', 3'-didehydro-2', 3'-dideoxyuridine with following addition of triphenylphosphonium iodides

Author: V. G. Kostina, A. S. Shalamay, and L. S. Vsenko
Subjects: Chemistry, General Biochemistry, Genetics and Molecular Biology
Published: 1996
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20. Two measurements of mixing using kaon tagging

Author: H. Wegener, R. Schwierz, R. G. Van de Water, T. Podobnik, H. Albrecht, J. Spengler, A. Hüpper, T. S. Yoon, R. Mankel, Klaus R. Schubert, R. Waldi, W. Schmidt-Parzefall, R. Wurth, R. Mundt, O. Igonkina, R. P. Hofmann, H. Kuipers, Yu. Gershtein, J. Stiewe, C. Frankl, Ivan Belyaev, A. Nau, S. Werner, C. Hast, Michael Schneider, D. Reßing, Sergey Semenov, G. Kernel, Hermann Kolanoski, M. Walter, H. Thurn, J. D. Prentice, T. Oest, R. Chistov, I. Tichomirov, A. Lange, Sebastian Nowak, J. Graf, K. Ehret, L. Gershtein, D. Wegener, D. Töpfer, P. Eckstein, O. Mai, I. Korolko, D. O. Litvintsev, M. Schramm, Vladislav Balagura, T. Kirchhoff, V. Eiges, B. Spaan, P. Krieger, M. Schieber, H. Kapitza, P. Pakhlov, G. Kostina, Thomas Hamacher, Axel Lindner, K. Reim, M. Schmidtler, R. Reiner, H. Schröder, Mikhail Danilov, R. Eckmann, Yu. Zaitsev, Holger Schulz, A. Kosche, K. T. Knöpfle, E. Križnič, T. Živko, Werner Hofmann, S. Weseler, D. B. Macfarlane, P. R. B. Saull, P. Križan, A. Golutvin, T. Siegmund, K. Tzamariudaki, and A. Snizhko
Subjects: Nuclear physics, Physics, Nuclear and High Energy Physics, Argus, Branching fraction, Electron–positron annihilation, DESY, Multiplicity (mathematics), computer, Mixing (physics), computer.programming_language
Abstract: Using the ARGUS detector at the e+e− storage ring DORIS II at DESY, we have made two measurements of the mixing parameter χd using kaons as flavour tags. Using D∗+ K± correlations we found χd = 0.20 ± 0.13 ± 0.12 and from the study of (D∗+l−) K± correlations we obtained χd = 0.19 ± 0.07 ± 0.09. The branching ratio for B → D∗+ X has been updated: Br(B → D∗+ X) = (19.6 ± 1.9)%. We have also determined the average multiplicity of charged kaons in B0 decays to be 0.78 ± 0.08.
Published: 1996
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21. Two-photon production of ω pairs

Author: Sebastian Nowak, D. Wegener, Mikhail Danilov, J. Spengler, T. Siegmund, M. Schramm, A. Kosche, R. Mundt, Axel Lindner, K. Ehret, C. Frankl, G. Kernel, R. Chistov, G. Kostina, Ivan Belyaev, R. Reiner, Werner Hofmann, A. Lange, I. Korolko, I. Tichomirov, H. Thurn, T. Oest, W. Schmidt-Parzefall, J. Stiewe, O. Mai, T. S. Yoon, O. Igonkina, D. Reßing, K. T. Knöpfle, J. Graf, V. Eiges, Klaus R. Schubert, H. Kuipers, D. Töpfer, Holger Schulz, P. R. B. Saull, A. Hüpper, H. Wegener, M. Schieber, T. Živko, R. P. Hofmann, T. Podobnik, H. Kapitza, K. Reim, Yu. Gershtein, P. Pakhlov, M. Schmidtler, R. Waldi, S. Weseler, R. G. Van de Water, C. Hast, Michael Schneider, A. Nau, Sergey Semenov, Hermann Kolanoski, Vladislav Balagura, L. Gershtein, Thomas Hamacher, P. Eckstein, R. Schwierz, D. O. Litvintsev, B. Spaan, H. Schröder, M. Walter, S. Werner, Sergey Barsuk, H. Albrecht, R. Mankel, R. Wurth, J. D. Prentice, P. Krieger, T. Kirchhoff, R. Eckmann, Yu. Zaitsev, K. Tzamariudaki, A. Snizhko, E. Križnič, D. B. Macfarlane, P. Križan, and A. Golutvin
Subjects: Physics, Nuclear and High Energy Physics, Cross section (physics), Argus, Two-photon excitation microscopy, Value (computer science), Production (computer science), Maximum likelihood analysis, Atomic physics, computer, Omega, computer.programming_language
Abstract: A maximum likelihood analysis of ARGUS data on two-photon production of π+π+π0π0π−π− is presented. A small fraction of events is due to the production of omega pairs. The γγ → ωω cross section has its maximum value close to threshold.
Published: 1996
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22. Measurement of the semileptonic branching fractions of the D0 meson

Author: I. Korolko, A. Snizhko, R. G. Van de Water, S. Weseler, Yu. Gershtein, J. Stiewe, R. Waldi, P. R. B. Saull, D. Reßing, M. Schieber, Ivan Belyaev, T. Oest, Klaus R. Schubert, A. Lindner, R. Mundt, M. Walter, J. Graf, D. Töpfer, R. Schwierz, C. Frankl, Mikhail Danilov, Michael Schneider, H. Kapitza, Olga Igonkina, M. Schmidtler, H. Wegener, J. Spengler, T. Siegmund, T. Podobnik, D. O. Litvintsev, H. Thurn, Sebastian Nowak, A. Kosche, T. S. Yoon, B. Spaan, G. Kernel, R. Chistov, P. Pakhlov, D. Wegener, V. Eiges, W. Schmidt-Parzefall, Werner Hofmann, I. Tichomirov, Vladislav Balagura, M. Schramm, L. Gershtein, P. Eckstein, Thomas Hamacher, K. Tzamariudaki, H. Kuipers, A. Nau, Sergey Semenov, Holger Schulz, Hermann Kolanoski, K. T. Knöpfle, H. Schröder, K. Reim, T. Živko, A. Hüpper, R. P. Hofmann, R. Eckmann, Yu. Zaitsev, T. Kirchhoff, S. Werner, H. Albrecht, R. Mankel, R. Wurth, Sergey Barsuk, C. Hast, A. Lange, O. Mai, E. Križnič, P. Krieger, J. D. Prentice, D. B. Macfarlane, P. Križan, A. Golutvin, K. Ehret, G. Kostina, and R. Reiner
Subjects: Nuclear physics, Physics, Nuclear and High Energy Physics, Argus, Annihilation, Meson, Branching fraction, Hadron, Analytical chemistry, Branching (polymer chemistry), computer, Particle Physics - Experiment, computer.programming_language
Abstract: Using the ARGUS detector at the e + e − storage ring DORIS II, we have measured the semileptonic branching ratios of the D 0 meson to be Br ( D 0 → e + ν e X ) = (6.9 ± 0.3 ± 0.5) % and Br ( D 0 → μ + ν μ X ) = (6.0 ± 0.7 ± 1.2) %, and the semileptonic branching ratio of the charmed hadron mixture from e + e − annihilation around 10 GeV to be Br ( c → e + ν e X ) = (9.6 ± 0.4 ± 1.1) %.
Published: 1996
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23. A measurement of the electronic widths Γ ee of the ϒ(1S), ϒ(2S), and ϒ(4S) resonances, and of the total decay width Γ of the ϒ(4S)

Author: R. P. Hofmann, S. Werner, P. Pakhlov, Ivan Belyaev, P. R. B. Saull, A. Snizhko, A. Hüpper, Peter Krieger, H. Wegener, T. Kirchhoff, Michael Schneider, Sebastian Nowak, D. Wegener, R. Schwierz, T. Podobnik, J. Spengler, A. Nau, Sergey Semenov, R. G. Van de Water, I. Korolko, H. Kapitza, D. Töpfer, Holger Schulz, C. Hast, T. Siegmund, A. Lindner, A. Lange, Hermann Kolanoski, M. Walter, P. Križan, W. Schmidt-Parzefall, A. Golutvin, G. Kernel, R. Chistov, M. Schmidtler, T. Živko, O. Mai, M. Schramm, R. Mundt, H. Schröder, H. Kuipers, Thomas Hamacher, T. Oest, M. Schieber, L. Gershtein, E. Križnič, H. Albrecht, R. Mankel, R. Wurth, K. Tzamariudaki, H. Thurn, P. Eckstein, Mikhail Danilov, D. O. Litvintsev, Vladislav Balagura, A. Kosche, K. T. Knöpfle, R. Waldi, T. S. Yoon, R. Eckmann, Werner Hofmann, Klaus R. Schubert, I. Tichomirov, Yu. Zaitsev, B. Spaan, W. Funk, J. D. Prentice, K. Reim, C. Frankl, S. Weseler, Yu. Gershtein, J. Stiewe, D. Reßing, Sergey Barsuk, K. Ehret, G. Kostina, R. Reiner, and D. B. MacFarlane
Subjects: Physics, Argus, Physics and Astronomy (miscellaneous), Electron–positron annihilation, Resonance, Elementary particle, DESY, Electron, Nuclear physics, Radiative transfer, Atomic physics, Engineering (miscellaneous), computer, Storage ring, computer.programming_language
Abstract: The partial decay width into electrons, Γ ee , of the ϒ(1S) and ϒ(2S) resonances have been measured with the detector ARGUS at thee+e− storage ring DORISII of DESY. Applying the formula of Kuraev and Fadin for the radiative corrections we find: Γ ee (ϒ(1S))= (1.32±0.04±0.03) keV and Γ ee (ϒ(2S))=(0.52±0.03±0.01) keV. The total decay width of the ϒ(4S) resonance and its partial width into electrons have been determined as well. Fitting the data with a generalized Breit-Wigner function with an energy dependent decay width Γ(s) and a mass shift functionm(s), we obtain the following resonance parameters: Γ(M2)=(10.0±2.8±2.7) MeV, Γ ee =(0.28±0.05±0.01)keV andB ee =(2.77±0.50±0.49)·10−5. We argue that the disagrecment of this result with the world average originates from our more adequate parametrization of the observed ϒ(4S) resonance cross section.
Published: 1995
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24. Measurement of the decay D* s2 + (2573) → D0K+

Author: J. Spengler, K. Ehret, T. Siegmund, S. Weseler, Lnn Tichomirov, Axel Lindner, D. Reßing, Sebastian Nowak, K. Reim, G. Kernel, Holger Schulz, D. Wegener, T. S. Yoon, H. Schröder, A. Lange, T. Kirchhoff, J. Graf, Thomas Hamacher, D. Töpfer, D. B. MacFarlane, W. Schmidt-Parzefall, O. Mai, I. Korolko, E. Križnič, M. Schramm, T. Živko, G. Kostina, M. Schmidtler, R. Waldi, R. P. Hofmann, P. R.B. Saull, Yu. Gershtein, R. Mundt, R. Reiner, K. T. Knöpfle, H. Albrecht, C. Frankl, J.D. Prentice, R. Mankel, R. Wurth, H. Kuipers, M. Schieber, H. Thurn, K. Tzamariudaki, Vladislav Balagura, Mikhail Danilov, I. Bleyaev, K. R. Schubert, H. Kapitza, P. Pakhlov, V. Eiges, Peter Krieger, A. Snizhko, R. Eckmann, P. Križan, A. Golutvin, Yu. Zaitsev, A. Kosche, R. G. Van de Walter, Werner Hofmann, A. Hüpper, L. Gershtein, C. Hast, Michael Schneider, Ruslan Chistov, Sergey Barsuk, R. Schwierz, T. Oest, H. Wegener, T. Podobnik, A. Nau, Sergey Semenov, Hermann Kolanoski, P. Eckstein, D. O. Litvintsev, B. Spaan, and M. Walter
Subjects: Nuclear physics, Physics, Cross section (physics), Argus, Physics and Astronomy (miscellaneous), Meson, Branching fraction, Detector, Value (computer science), DESY, computer, Storage ring, computer.programming_language
Abstract: Using the ARGUS detector at the e+e− storage ring DORIS II at DESY we have measured the parameters of a charmed strange meson D* s2 + (2573) decaying into D0K+. The mass of this state was found to be (2574.5±3.3±1.6) MeV/c 2. The measured value of its width is (10.4±8.3±3.0) MeV and the product of the production cross section and branching ratio for this channel was determined to be (10.6±4.2 −1.2 +2.3 ) pb.
Published: 1995
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25. A search for the lepton-flavour violating decays τ → eα, τ → μα

Author: Holger Schulz, Sebastian Nowak, D. Wegener, T. Živko, R. Schwierz, M. Schramm, H. Schröder, S. Weseler, P. Pakhlov, H. Wegener, A. Golutvin, P. R. B. Saull, J. Spengler, T. Kirchhoff, A. Hüpper, T. Podobnik, C. Hast, I. Korolko, Ivan Belyaev, Klaus R. Schubert, A. Lange, V. Eiges, M. Walter, R. Mundt, K. Ehret, A. Snizhko, H. Kapitza, O. Mai, C. Frankl, H. Thurn, Michael Schneider, G. Kostina, P. Eckstein, Yu. Gershtein, D. O. Litvintsev, M. Schmidtler, W. Schmidt-Parzefall, T. Oest, O. Igonkina, B. Spaan, R. Reiner, H. Kuipers, A. Nau, Sergey Semenov, R. P. Hofmann, Hermann Kolanoski, R. Eckmann, Yu. Zaitsev, S. Werner, J. Graf, J. Stiewe, Mikhail Danilov, D. Töpfer, D. Reßing, R. G. Van de Water, Vladislav Balagura, R. Waldi, P. Križnič, A. Kosche, K. Tzamariudaki, Thomas Hamacher, Werner Hofmann, I. Tichomirov, T. S. Yoon, G. Kernel, R. Chistov, M. Schieber, K. T. Knöpfle, L. Gershtein, D. B. MacFarlane, K. Reim, H. Albrecht, R. Mankel, R. Wurth, Sergey Barsuk, P. Kreger, J. D. Prentice, T. Siegmund, and A. Lindner
Subjects: Physics, Particle physics, Argus, Physics and Astronomy (miscellaneous), Physics::Instrumentation and Detectors, Electron–positron annihilation, High Energy Physics::Phenomenology, Flavour, DESY, Spectral line, Nuclear physics, High Energy Physics::Experiment, Engineering (miscellaneous), computer, Storage ring, Lepton, computer.programming_language
Abstract: Lepton spectra in τ decays have been studied with the ARGUS detector at thee+e− storage ring DORIS II at DESY using the “pseudo-rest-frame” technique. We have improved upper limits for two-body τ-decays into a lepton and an unobservable particle.
Published: 1995
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26. Measurement of the decay fractions ofD * mesons

Author: A. Hüpper, T. Siegmund, V. Lubimov, J. D. Prentice, C. Frankl, R. Waldi, D. O. Litvintsev, Sebastian Nowak, D. Wegener, C. Hast, A. Lange, O. Mai, B. Spaan, H. Kapitza, I. Tichomirov, M. Schramm, Ivan Belyaev, G. Kostina, Manfred Paulini, I. Korolko, R. Schwierz, D. B. MacFarlane, P. Križan, Alexander Undrus, A. Golutvin, Mikhail Danilov, D. Töpfer, Michael Schneider, A. Kosche, Yuri Gershtein, A. Droutskoy, Klaus R. Schubert, K. Tzamariudaki, Vladimir Blinov, Peter Krieger, Werner Hofmann, H. Albrecht, R. Mankel, R. Wurth, R. Reiner, A. Snizhko, M. Schieber, R. Mundt, T. S. Yoon, P. Eckstein, Thomas Hamacher, P. R. B. Saull, R. P. Hofmann, H. Thurn, R. Eckmann, Yu. Zaitsev, S. Werner, E. Križnič, S. Chechelnitsky, T. Kirchhoff, R. G. Van de Water, M. Walter, P. Pakhlov, S. Khan, J. Stiewe, K. Ehret, K. T. Knöpfle, D. Reßing, H. Schröder, J. Spengler, G. Kernel, Holger Schulz, T. Živko, V. Zhilich, W. Schmidt-Parzefall, H. Kuipers, A. Nau, Sergey Semenov, Hermann Kolanoski, H. Wegener, T. Podobnik, A. Lindner, C. Ratz, T. Oest, K. Reim, S. Weseler, H. Ehrlichmann, M. Schmidtler, and Vladislav Balagura
Subjects: Physics, Argus, Nuclear magnetic resonance, Physics and Astronomy (miscellaneous), Meson, Electron–positron annihilation, Analytical chemistry, Engineering (miscellaneous), computer, computer.programming_language
Abstract: Using the ARGUS detector at the DORIS II electron-positron storage ring at DESY, we have measured BR(D*+→D0π+)=(68.8±2.4±1.3)%, BR(D*+→D+π0)=(31.2±1.1±0.8)%, BR(D*+→D+γ)
Published: 1995
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27. The first measurement of the Michel parameter η in τ decays

Author: Mikhail Danilov, Ivan Belyaev, G. Kostina, Klaus R. Schubert, T. S. Yoon, R. Schwierz, S. Weseler, A. Nau, Sergey Semenov, D. O. Litvintsev, R. Reiner, A. Kosche, Yuri Gershtein, B. Spaan, Hermann Kolanoski, D. Töpfer, I. Korolko, P. Pakhlov, P. Eckstein, H. Schröder, R. P. Hofmann, P. R.B. Saull, V. Lubimov, T. Siegmund, Werner Hofmann, Sebastian Nowak, D. Wegener, M. Schmidtler, R. G. Van de Water, I. Tichomirov, J. Stiewe, H. Wegener, K. T. Knöpfle, S. Chechelnitsky, R. Mundt, D. Reßing, P. Krieger, K. Ehret, A. Snizhko, C. Hast, H. Thurn, T. Podobnik, J. Spengler, Michael Schneider, E. Križnič, H. Kapitza, A. Hüpper, D. B. MacFarlane, Holger Schulz, K. Reim, J. D. Prentice, R. Waldi, Axel Lindner, T. Živko, A. Droutskoy, G. Kernel, A. Lange, C. Frankl, M. Walter, T. Oest, O. Mai, M. Schieber, R. Eckmann, Thomas Hamacher, Yu. Zaitsev, S. Werner, K. Tzamariudaki, P. Križan, A. Golutvin, W. Schmidt-Parzefall, Vladislav Balagura, H. Kuipers, T. Kirchhoff, H. Albrecht, R. Mankel, and R. Wurth
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Argus, Electron–positron annihilation, Hadron, DESY, Spectral line, Vertex (geometry), Nuclear physics, High Energy Physics::Experiment, computer, Storage ring, computer.programming_language, Lepton
Abstract: Using the ARGUS detector at the e+e - storage ring DORIS II at DESY, we have studied lepton energy spectra in ~- decays. We present a "pseudo-rest-frame" technique in which the second r in the event, decaying into a heavy hadronic system, is used as reference. This method allows for the first measurement of the Michel Parameter 7/in ~- decays. We also determine the Michel Parameter p in 7" --~ e~u decays with a precision comparable to the present world average. The measured values of the parameters p = 0.735 4- 0.036 4- 0.020 and r 1 = 0.03 4- 0.18 4- 0.12 are in good agreement with standard V-A coupling at the ~--~,-W vertex.
Published: 1995
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28. Evidence for W-exchange in charmed baryon decays

Author: S. Werner, D. O. Litvintsev, H. Schröder, Vladislav Balagura, B. Spaan, M. Walter, H. Wegener, Klaus R. Schubert, P. Krieger, T. Podobnik, I. Tichomirov, V. Lubimov, R. Waldi, M. Schieber, R. Mundt, I. Korolko, G. Kostina, H. Albrecht, R. Mankel, R. Wurth, P. R. B. Saull, Sebastian Nowak, D. Wegener, P. Križan, A. Golutvin, P. Eckstein, H. Thurn, Axel Lindner, Thomas Hamacher, S. Weseler, R. Schwierz, R. Reiner, Sally Seidel, H. Kapitza, A. Hüpper, T. Oest, Ivan Belyaev, Holger Schulz, J. D. Prentice, E. Križnič, A. Nau, Sergey Semenov, J. Stiewe, W. Schmidt-Parzefall, A. Snizhko, C. Frankl, R. P. Hofmann, S. Chechelnitsky, Hermann Kolanoski, K. Ehret, M. Schmidtler, H. Kuipers, C. E. K. Charlesworth, D. Töpfer, K. T. Knöpfle, T. Živko, T. Kirchhoff, D. B. Macfarlane, Mikhail Danilov, U. Becker, A. Droutskoy, D. Reßing, P. Pakhlov, T. Siegmund, J. Spengler, A. Kosche, A. Lange, G. Kernel, P. Eckmanm, K. Reim, O. Mai, Werner Hofmann, C. Hast, Michael Schneider, Yu. Zaitsev, Yu. Gershtein, T. S. Yoon, R. G. Van de Water, and K. Tzamariudaki
Subjects: Nuclear physics, Physics, Baryon, Nuclear and High Energy Physics, Argus, Particle physics, Branching fraction, Electron–positron annihilation, Mass spectrum, DESY, computer, computer.programming_language
Abstract: Using the detector ARGUS at the e+e− storage ring DORIS II at DESY, we have observed the decays Λc+ → Ξ−K+π+ and Λc+ → Ξ∗0K+ and obtained evidence for the decay Ξc0 → ΛKs0. All three of these decays are of interest as they provide information about W-exchange processes. The products of cross sections and branching ratios for Λc+ → Ξ−K+π+ and Λc+ → Ξ∗0K+ are (1.7±0.3±0.3) pb and (0.6±0.2±0.1) pb, respectively, which implies that (35±17) % of the Ξ−K+π+ final state is generated through a two-body decay via intermediate W-exchange. The product of production cross section and branching ratio for Ξc0 → Λ Ks0 is (2.1 ± 1.0 ± 0.6) pb.
Published: 1995
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29. Measurement of the polarization in the decay

Author: A. Snizhko, Holger Schulz, W. Schmidt-Parzefall, H. Kapitza, T. Živko, Ivan Belyaev, K. Tzamariudaki, H. Kuipers, R. Mundt, D. Töpfer, Yu. Gershtein, S. Weseler, R. G. Van de Water, Mikhail Danilov, L. Gershtein, H. Thurn, J. Stiewe, M. Schieber, Sebastian Nowak, T. Siegmund, R. Waldi, A. Droutskoy, D. Wegener, I. Korolko, E. Križnič, A. Kosche, G. Kostina, P. Pakhlov, M. Schramm, A. Lange, T. Kirchhoff, D. B. Macfarlane, Werner Hofmann, A. Hüpper, K. Reim, H. Wegener, T. Podobnik, R. Reiner, O. Mai, Vladislav Balagura, T. S. Yoon, K. T. Knöpfle, Axel Lindner, S. Barsuk, C. Hast, Michael Schneider, R. Chistov, I. Tichomirov, Klaus R. Schubert, D. Reβing, A. Nau, Sergey Semenov, H. Albrecht, R. Mankel, Hermann Kolanoski, J. Spengler, R. Wurth, T. Oest, P. R. B. Saull, P. Križan, A. Golutvin, M. Schmidtler, G. Kernel, Thomas Hamacher, K. Ehret, R. Schwierz, D. O. Litvintsev, B. Spaan, P. Eckstein, H. Schröder, M. Walter, R. P. Hofmann, P. Krieger, J. D. Prentice, C. Frankl, S. Werner, R. Eckmann, and Yu. Zaitsev
Subjects: Nuclear physics, Physics, Nuclear and High Energy Physics, Argus, Particle physics, Electron–positron annihilation, CP violation, Polarization (waves), computer, Storage ring, computer.programming_language
Abstract: Polarization in the exclusive decay B → J/ψK ∗ was measured using the ARGUS detector at the e+e− storage ring DORIS II. The ratio of the transverse to the total decay width was found to be ΓT/Γ = 0.03±0.16±0.15. This measurement demonstrates that the B 0 → J/ψK ∗0 decay channel can be effectively used for CP violation studies.
Published: 1994
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30. Measurement of the absolute branching fractions for D0 decays into

Author: Sebastian Nowak, D. Wegener, M. Walter, R. Schwierz, V. Lubimov, E. Gershtein, M. Schieber, M. Schmidtler, T. Oest, W. Schmidt-Parzefall, I. Korolko, G. Kernel, Klaus R. Schubert, R. Eckmann, Yu. Zaitsev, H. Schröder, H. Kuipers, H. Wegener, C. Hast, S. Werner, T. Kirchhoff, R. G. Van de Water, T. Podobnik, A. Lange, S. Barsuk, G. Kostina, A. Lindner, R. Waldi, T. Siegmund, D. O. Litvintsev, O. Mai, Michael Schneider, Vladislav Balagura, Mikhail Danilov, John D. Spengler, T. S. Yoon, B. Spaan, Thomas Hamacher, H. Albrecht, R. Reiner, R. Mankel, R. Wurth, P. Pakhlov, K. T. Knöpfle, P. R. B. Saull, H. Kapitza, P. Eckstein, K. Ehret, R. P. Hofmann, M. Schram, Ivan Belyaev, A. Kosche, D. Töpfer, A. Droutskoy, Werner Hofmann, I. Tichomirov, Holger Schulz, A. Nau, Sergey Semenov, Hermann Kolanoski, A. Hüpper, T. Živko, K. Tzamariudaki, R. Mundt, A. Snizhko, H. Thurn, J. Stiewe, D. Reβing, K. Reim, Yu. Gershtein, S. Weseler, P. Krieger, J. D. Prentice, C. Frankl, E. Križnič, D. B. Macfarlane, P. Križan, and A. Golutvin
Subjects: Physics, Nuclear physics, Nuclear and High Energy Physics, Argus, Crystallography, Angular distribution, Meson, Electron–positron annihilation, Branching (polymer chemistry), computer, computer.programming_language
Abstract: Using the ARGUS detector at the e+ e− storage ring DORIS II we have measured the absolute branching ratios of the D0 meson, Br(D0→K− π+)=(3.41±0.12±0.28)%, Br(D0→K− π+ π+ π−)=(6.80± 0.27±0.57)%, and Br (D 0 → K 0 π + π − )=(5.03±0.39±0.49)% .
Published: 1994
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31. Determination of the structure of τ decays in the reaction and a precision measurement of the τ-neutrino helicity

Author: I. Tichomirov, A. Lange, Ivan Belyaev, T. Oest, O. Mai, E. Križnič, Vladislav Balagura, S. Weseler, T. Kirchhoff, R. Mundt, Sebastian Nowak, D. Wegener, D. O. Litvintsev, A. Snizhko, H. Thurn, Mikhail Danilov, D. Töpfer, T. S. Yoon, B. Spaan, I. Korolko, J. D. Prentice, Axel Lindner, V. Lubimov, A. Kosche, Yuri Gershtein, J. Stiewe, M. Schramm, S. Werner, P. Pakhlov, H. Wegener, W. Schmidt-Parzefall, M. Schmidtler, D. Reßing, C. Hast, Michael Schneider, D. B. MacFarlane, R. Waldi, T. Podobnik, R. P. Hofmann, P. R.B. Saull, Werner Hofmann, A. Hüpper, Thomas Hamacher, H. Kapitza, M. Walter, P. Krieger, H. Albrecht, R. Mankel, A. Droutskoy, P. Križan, A. Golutvin, R. Wurth, Holger Schulz, C. Frankl, R. Eckmann, Yu. Zaitsev, P. Eckstein, T. Živko, H. Kuipers, R. Schwierz, H. Schröder, T. Siegmund, K. Reim, A. Nau, Sergey Semenov, Hermann Kolanoski, S. Chechelnitsky, K. Ehret, G. Kostina, R. Reiner, M. Schieber, K. Tzamariudaki, R. G. Van de Water, K. R. Schubert, J. Spengler, G. Kernel, and K. T. Knöpfle
Subjects: Physics, Pseudoscalar, Nuclear and High Energy Physics, Particle physics, Absolute value, Neutrino, Helicity, Pseudovector, Standard Model, Spin-½, Lepton
Abstract: Using the ARGUS detector at the DORIS II storage ring we have investigated the Lorentz structure of the electroweak interaction in semi-hadronic τ decays. Spin correlations in the process e + e − → τ + τ − → v τ π + π 0 v τ π − π 0 are exploited for a measurement of the normalized product of the vector ( g V ) and axial vector ( g A ) couplings of the τ lepton, γin AV = 2 Re {g A g V ∗ } (|g V | 2 ) . The correlations are sensitive to the product of the couplings in both τ decays: γ AV 2 = γ AV (τ − → ν τ W − ) AV = −h(v τ )h( v τ ) . The measured value, γ AV 2 = 1.044±0.057±0.060, determines the relative sign of the neutrino helicities. Assuming CP invariance, the absolute value | γ AV | = 1.022±0.028±0.030 was found to be incellent agreement with the Standard Model. The contribution of scalar ( g s ) or pseudoscalar ( g P ) couplings was also investigated. No evidence for a scalar-like coupling was found.
Published: 1994
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32. Determination of the radiative decay width of the η meson

Author: I. Korolko, Klaus R. Schubert, K. Reim, Sebastian Nowak, Mikhail Danilov, A. Hüpper, D. Wegener, A. Kosche, J. Spengler, Werner Hofmann, G. Kostina, R. Mundt, A. Nau, Sergey Semenov, T. Oest, K. Tzamariudaki, H. Albrecht, Thomas Hamacher, Hermann Kolanoski, R. Mankel, R. Wurth, Yu. Gershtein, M. Schramm, S. Werner, R. Reiner, T. S. Yoon, H. Thurn, P. Kržan, A. Snizhko, P. Eckstein, H. Kapitza, H. Wegener, V. Lubimov, S. Weseler, P. Pakhlov, M. Walter, D. O. Litvintsev, D. Reβing, P. Krieger, Ivan Belyaev, T. Podobnik, G. Kernel, B. Spaan, J. Stiewe, J. D. Prentice, R. G. Van de Water, C. Frankl, D. Töpfer, Axel Lindner, Holger Schulz, R. P. Hofmann, C. Hast, Michael Schneider, T. Kirchhoff, S. Chechelnitsky, R. Schwierz, M. Schmidtler, T. Živko, R. Waldi, M. Schieber, K. Ehret, A. Droutskoy, H. Schröder, R. Eckmann, Yu. Zaitsev, K. T. Knöpfle, A. Golutvin, E. Križnič, D. B. Macfarlane, Vladislav Balagura, A. Lange, O. Mai, W. Schmidt-Parzefall, H. Kuipers, P. R. B. Saull, T. Siegmund, and I. Tichomirov
Subjects: Physics, Nuclear physics, Nuclear and High Energy Physics, Argus, Meson, Branching fraction, Radiative decay, Mass spectrum, Value (computer science), Atomic physics, computer, computer.programming_language
Abstract: An analysis of the reaction yy ~ r/c was l~erformed in five different decay channels of the r/c: /~sK+~r ~, K+K-Tr+~ "- , 27r+21r -, ~b~b and 2K+2K -. A value Fry(r/c) = ( 11.3 + 4.2) keV was obtained for the radiative decay width by combining the results from the first four channels. Using our result on the two-photon width we also determined the branching ratio for the decay r/c --~ 2K+2K -.
Published: 1994
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33. Study ofD 0 andD + decays into final states with two or three kaons

Author: C. Hast, P. R. B. Saull, S. Weseler, T. Siegmund, I. Korolko, V. Lubimov, P. Križan, A. Golutvin, R. Schwierz, Klaus R. Schubert, R. Waldi, G. Kostina, A. Lange, O. Mai, M. Schmidtler, E. Križnič, Sebastian Nowak, D. B. MacFarlane, R. Mundt, D. Wegener, I. Tichomirov, R. Chistov, D. O. Litvintsev, H. Wegener, A. Droutskoy, R. Reiner, J. D. Prentice, A. Lindner, A. Snizhko, B. Spaan, C. Frankl, T. Podobnik, H. Thurn, M. Schramm, R. Eckmann, Yu. Zaitsev, K. Reim, Vladislav Balagura, A. Hüpper, P. Pakhlov, Ivan Belyaev, R. P. Hofmann, T. S. Yoon, P. Eckstein, T. Oest, S. Chechelnitsky, D. Töpfer, Peter Krieger, K. Tzamariudaki, Mikhail Danilov, K. Ehret, Holger Schulz, A. Kosche, T. Živko, Werner Hofmann, R. G. Van de Water, John D. Spengler, H. Albrecht, R. Mankel, R. Wurth, T. Kirchhoff, H. Kapitza, K. T. Knöpfle, Thomas Hamacher, A. Nau, Sergey Semenov, Hermann Kolanoski, W. Schmidt-Parzefall, M. Walter, G. Kernel, H. Kuipers, M. Schieber, H. Schröder, Yu. Gershtein, S. Barsuk, Michael Schneider, J. Stiewe, D. Reßing, and S. Werner
Subjects: Physics, Argus, Particle physics, Physics and Astronomy (miscellaneous), Meson, Branching fraction, Model prediction, Elementary particle, Nuclear physics, Field theory (psychology), Quantum field theory, Engineering (miscellaneous), computer, Storage ring, computer.programming_language
Abstract: Using the ARGUS detector at thee+e− storage ring DORIS II, we have studied Cabibbo-suppressedD0 decay modes resulting in theK+K−π+π− final state and two-bodyD0 decay modes with a ϕ meson in the final state. TheBR(D0→KS0KS0π+π− was measured for the first time. We also present a measurement of theD+→KS0KS0K+ branching ratio. The values are compared with other experimental results and model predictions.
Published: 1994
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34. Reconstruction of the decay B− → D10(2414) π−

Author: M. Walter, Holger Schulz, S. Chechelnitsky, H. Wegener, T. Podobnik, Michael Schneider, J. Stiewe, K. T. Knöpfle, K. Ehret, I. Tichomirov, Klaus R. Schubert, M. Schieber, T. Živko, T. Oest, R. Schwierz, G. Kostina, John D. Spengler, V. Lubimov, A. Lindner, H. Albrecht, R. Mankel, Sebastian Nowak, I. Korolko, Mikhail Danilov, R. Mundt, R. P. Hofmann, R. Wurth, D. Wegener, H. Schröder, G. Kernel, K. Reim, A. Kosche, P. Križan, A. Golutvin, H. Thurn, P. R. B. Saull, T. Kirchhoff, Vladislav Balagura, W. Schmidt-Parzefall, Werner Hofmann, A. Hüpper, P. Pakhlov, C. Hast, A. Droutskoy, Yu. Gershtein, T. Siegmund, T. S. Yoon, S. Weseler, K. Tzamariudaki, H. Kuipers, A. Nau, Sergey Semenov, A. Lange, R. Eckmann, Hermann Kolanoski, Yu. Zaitsev, A. Snizhko, D. Reβing, P. Eckstein, D. O. Litvintsev, R. G. Van de Water, B. Spaan, M. Schmidtler, S. Werner, Ivan Belyaev, E. Križnič, D. B. Macfarlane, D. Töpfer, R. Waldi, O. Mai, H. Kapitza, Thomas Hamacher, J. D. Prentice, C. Frankl, R. Reiner, and P. Krieger
Subjects: Physics, Nuclear and High Energy Physics, Argus, Meson, Excited state, Analytical chemistry, Atomic physics, computer, computer.programming_language
Abstract: We present the results of a partial reconstruction of the decay channel B − → D j (∗) π − performed using the ARGUS detector operating at the e+e− storage-ring DORIS II. In the context of this paper, D j (∗)0 is an L = 1 excited charm meson decaying to D ∗+ π − . The measured product of branching ratios is Br(B − → D 1 0 (2414)π − ) · Br Br(D 1 0 → D ∗+ π − ) = (0.17 ± 0.05 ± 0.04)% where the first error is statistical and statistical and the second systematic. No evidence for the decay B − → D 2 ∗0 (2459) π − ) · Br(D 2 ∗0 → D ∗+ π − ) at the 90% confidence level.
Published: 1994
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35. Kaons in flavour taggedB decays

Author: K. T. Knöpfle, V. Lubimov, A. Nau, Sergey Semenov, J. Spengler, G. Kernel, Hermann Kolanoski, H. I. Cronström, J. D. Prentice, M. Schieber, M. Walter, Dave Britton, J. Stiewe, P. M. Patel, Ivan Belyaev, A. Hüpper, D. O. Litvintsev, H. Albrecht, E. Križnič, H. Schröder, P. Pakhlov, Manfred Paulini, R. Wurth, B. Spaan, W. Funk, R. Waldi, D. Reßing, Sebastian Nowak, D. Wegener, R. P. Hofmann, T. S. Yoon, Leif J. Jönsson, S. Werner, Fedor Ratnikov, M. Bittner, K. Tzamariudaki, T. Kirchhoff, Michael Schneider, Peter Krieger, T. Oest, D. B. MacFarlane, C. Hast, D. Töpfer, K. Strahl, Vladislav Balagura, P. Eckstein, M. Seeger, A. Droutskoy, W. Schmidt-Parzefall, H. Wegener, A. Lange, P. R. B. Saull, I. Tichomirov, Thomas Hamacher, Yu. Zaitsev, V. Soloshenko, T. Podobnik, Yu. Gershtein, C. E. K. Charlesworth, A. Snizhko, Holger Schulz, A. Lindner, T. Siegmund, E.R.F. Hyatt, R. G. Van de Water, K. W. Edwards, P. Križan, A. Golutvin, S. Khan, T. Živko, Mikhail Danilov, H. Kapitza, A. Kosche, Werner Hofmann, R. Mundt, H. Thurn, S. Weseler, H. Ehrlichmann, M. Schmidtler, K. Reim, Rainer Mankel, K. R. Schubert, S. Chechelnitsky, K. Ehret, G. Kostina, and R. Reiner
Subjects: Physics, Particle physics, Argus, Physics and Astronomy (miscellaneous), Meson, Electron–positron annihilation, High Energy Physics::Phenomenology, Flavour, Nuclear physics, Angular distribution, High Energy Physics::Experiment, Nuclear Experiment, Engineering (miscellaneous), computer, Storage ring, Lepton, computer.programming_language
Abstract: Using the ARGUS detector at thee+e− storage ring DORIS II, flavour-dependent kaon production inB meson decays has been studied. Using the leptons as flavour tags, it has been possible to separately measure the multiplicities ofK+,K− andKs0 in inclusiveB decays and in semileptonicB decays. The kaon production in semileptonicB decays was further used to estimate the ratio of charmed decays over all decays, and thus also the fraction of charmlessB decays.
Published: 1994
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36. Observation of γγ → φϱ0 and γγ → φω

Author: H. Wegener, T. Podobnik, V. Lubimov, Sebastian Nowak, I. Korolko, D. Wegener, T. Oest, D. O. Litvintsev, T. Siegmund, C. E.K. Charlesworth, M. Schieber, A. Hüpper, M. Walter, John D. Spengler, D. B. MacFarlane, K. Reim, S. Chechelnitsky, K. Tzamariudaki, Michael Schneider, P. Krieger, B. Spaan, P. Pakhlov, K. Ehret, H. Kapitza, E. Križan, H. Albrecht, R. Mankel, A. Droutskoy, R. Wurth, W. Schmidt-Parzefall, G. Kernel, A. Nau, C. Franki, C. Hast, R. Mundt, Sergey Semenov, Vladislav Balagura, M. Seeger, R. Eckmann, K. W. Edwards, R. Schwierz, A. Lange, H. Schröder, Yu. Zaitsev, S. Werner, T. Kirchhoff, Klaus R. Schubert, Hermann Kolanoski, R. P. Hofmann, P. R.B. Saull, G. Kostina, Thomas Hamacher, H. Thurn, Manfred Paulini, Dave Britton, I. Tichomirov, R. Reiner, P.M. Patel, R. Waldi, R. G. Van de Water, Holger Schulz, S. Khan, T. S. Yoon, E. R.F. Hyatt, A. Lindner, T. Živko, P. Eckstein, Ivan Belyaev, Mikhail Danilov, D. Töpfer, A. Kosche, Yuri Gershtein, A. Snizhko, Werner Hofmann, K. T. Knöpfle, J. D. Prentice, M. Schmidtler, J. Stiewe, D. Reßing, S. Weseler, H. Ehrlichmann, P. Križan, and A. Golutvin
Subjects: Physics, Nuclear physics, Nuclear and High Energy Physics, Particle physics, Argus, Hadron, DESY, computer, Storage ring, computer.programming_language
Abstract: Two-photon production of the hadronic final states K + K − π + π − and K + K − π + π 0 π − has been studied using the ARGUS detector at the e + e − storage ring DORIS II at DESY. The cross sections of the reactions γγ → oϱ 0 and γγ → oω have been measured for the first time. In addition, angular distrubutions have been determined for the reaction γγ → oϱ 0 → K + K − π + π − .
Published: 1994
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37. Observation of polarization effects in Λc+ semileptonic decay

Author: R. Waldi, I. Korolko, C. Hast, S. Weseler, M. Seeger, A. Lange, Mikhail Danilov, Sebastian Nowak, D. Wegener, O. Mai, H. Ehrlichmann, Holger Schulz, A. Kosche, Ivan Belyaev, H. Kapitza, H. Wegener, R. Eckmann, D. Töpfer, Yu. Gershtein, H. Albrecht, Yu. Zaitsev, S. Werner, Klaus R. Schubert, Thomas Hamacher, H. Kuipers, Werner Hofmann, M. Schmidtler, R. Mankel, J. Stiewe, I. Tichomirov, R. Wurth, K. Tzamariudaki, T. Živko, Michael Schneider, T. Podobnik, P. R. B. Saull, P. Krieger, P. Pakhlov, R. P. Hofmann, T. Kirchhoff, V. Lubimov, J. D. Prentice, T. Siegmund, G. Kostina, D. Reβing, K. Reim, C. Frankl, T. Oest, R. Mundt, R. Reiner, A. Hüpper, H. Thurn, A. Snizhko, A. Nau, Sergey Semenov, S. Chechelnitsky, Hermann Kolanoski, K. Ehret, Vladislav Balagura, A. Droutskoy, P. Križan, H. Schröder, A. Golutvin, M. Walter, P. Eckstein, E. Križnič, D. B. Macfarlane, R. Schwierz, D. O. Litvintsev, W. Schnidt-Parzefall, B. Spaan, T. S. Yoon, J. Spengler, G. Kernel, M. Schieber, R. G. Van de Water, A. Lindner, S. Khan, and K. T. Knöpfle
Subjects: Physics, Semileptonic decay, Nuclear and High Energy Physics, Particle physics, Argus, media_common.quotation_subject, Electron–positron annihilation, Elementary particle, Polarization (waves), Asymmetry, Baryon, Nuclear physics, Particle decay, computer, media_common, computer.programming_language
Abstract: Polarization of the Λ daughter baryon from Λc+ → Λl+ vl decay has been measured for the first time using the ARGUS detector at the DORIS II ϵ+ϵ− storage ring. Expressed in terms of the Λc+ semileptonic asymmetry parameter the result is αΛc= −0.91±0.49 for events in the mass region 1.85
Published: 1994
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38. A study of mixing using partial reconstruction

Author: R. Mundt, R. Waldi, H. Thurn, D. B. MacFarlane, C. Hast, M. Seeger, A. Droutskoy, K. Reim, A. Lange, Rainer Mankel, Manfred Paulini, M. Schmidtler, R. P. Hofmann, P. R.B. Saull, S. Werner, K. R. Schubert, S. Chechelnitsky, D. O. Litvintsev, P. Pakhlov, A. Hüpper, B. Spaan, A. Nau, Sergey Semenov, V. Lubimov, T. Siegmund, T. Kirchhoff, Hermann Kolanoski, I. Korolko, Sebastian Nowak, Holger Schulz, S. Weseler, D. Wegener, K. Ehret, T. Živko, T. S. Yoon, K. T. Knöpfle, W. Schmidt-Parzefall, I. Tichomirov, H. Ehrlichmann, A. Snizhko, G. Kostina, J. D. Prentice, Ivan Belyaev, Thomas Hamacher, P. Krieger, Mikhail Danilov, J. Stiewe, R. Reiner, A. Kosche, J. Spengler, D. Töpfer, Yuri Gershtein, D. Reßing, Werner Hofmann, Vladislav Balagura, H. Albrecht, C. E.K. Charlesworth, G. Kernel, R. Wurth, R. Eckmann, Yu. Zaitsev, K. W. Edwards, H. Wegener, M. Schieber, K. Tzamariudaki, P. M. Patel, M. Walter, H. Kapitza, E. Križnič, T. Podobnik, H. Schröder, M. Schnieder, T. Oest, P. Križan, A. Golutvin, R. G. Van de Water, S. Khan, E. R.F. Hyatt, P. Eckstein, Dave Britton, and A. Lindner
Subjects: Physics, Nuclear and High Energy Physics, Meson, Branching fraction, Electron–positron annihilation, Analytical chemistry, B meson, Atomic physics, Lepton
Abstract: Using the ARGUS detector at the e + e − storage ring DORIS II at DESY, we have studied the decay B 0 → D ∗+ l − v by exploiting a partial D ∗+ reconstruction technique. The branching ratio for this mode was thereby determined to be (4.5 ± 0.3 ± 0.4)%. Using the corresponding sample of tagged B 0 mesons, we measured the B 0 B 0 mixing parameter to be r d = 0.194 ± 0.062 ± 0.054, a result only weakly dependent upon the ratio of semileptonic widths for and production rates of B 0 and B + mesons. We have also determined the branching ratio Br ( B 0 → X l − v to be (9.3 ± 1.1 ± 1.5)%. By comparing the results for full and partial D ∗+ reconstuction we found the absolute branching ratios for D 0 → K − π + and D 0 → K − π + π + π − to be (4.5 ± 0.6 ± 0.4)% and (7.9 ± 1.5 ± 0.9)%, respectively.
Published: 1994
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39. Inclusive production ofK *(892),ρ 0, andω(783) mesons in theϒ energy region

Author: R. G. Van de Water, T. S. Yoon, S. Khan, A. Snizhko, C. Hast, W. Schmidt-Parzefall, P. Pakhlov, M. Seeger, A. Lange, I. Korolko, C. E. K. Charlesworth, A. Nau, Sergey Semenov, Hermann Kolanoski, E. Križnič, Sebastian Nowak, D. Wegener, K. Strahl, Vladislav Balagura, I. Tichomirov, S. Weseler, V. Lubimov, P. Križan, A. Golutvin, K. W. Edwards, Michael Schneider, H. Ehrlichmann, Holger Schulz, P. Eckstein, A. Hüpper, T. Oest, D. O. Litvintsev, J. Stiewe, D. Reßing, R. Waldi, H. Wegener, T. Živko, M. Walter, Ivan Belyaev, T. Podobnik, Mikhail Danilov, A. Lindner, B. Spaan, J. D. Prentice, H. Schröder, A. Kosche, Yuri Gershtein, K. Tzamariudaki, E. R.F. Hvatt, D. Töpfer, Peter Krieger, Werner Hofmann, K. Reim, Dave Britton, R. Mundt, H. Thurn, Rainer Mankel, T. Siegmund, M. Schmidtler, Manfred Paulini, P. R. B. Saull, S. Werner, M. Bittner, R. Eckmann, Yu. Zaitsev, D. B. MacFarlane, A. Droutskoy, G. Kostina, R. Reiner, T. Kirchhoff, K. R. Schubert, S. Chechelnitsky, K. Ehret, H. Albrecht, R. Wurth, Thomas Hamacher, V. Soloshenko, H. Kapitza, R. P. Hofmann, K. T. Knöpfle, J. Spengler, G. Kernel, M. Schieber, and P. M. Patel
Subjects: Baryon, Quark, Physics, Particle physics, Physics and Astronomy (miscellaneous), Meson, Electron–positron annihilation, Elementary particle, Vector meson, Engineering (miscellaneous), Pseudoscalar meson, Gluon
Abstract: The production ofK *+(892),K *0(892),ρ 0(770) andω(783) vector mesons inρ 0(770) events as well as in the gluonic Υ(1S) decays andρ 0(770) decays has been studied using the ARGUS detector. Combining these results with data on pseudoscalar meson, ϕ meson and baryon production collected with the same detector allow comprehensive studies of quark and gluon fragmentation. Model independent information ons quark and vector meson suppression (s/u=0.37±0.04,V/(V+P) π=0.21±0.04 andV/(V+P) K =0.34±0.03)) are derived. The data are compared with predictions from the models Jetset 7.3 and UCLA 7.31.
Published: 1994
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40. Investigation of the decays $$\bar B^0 \to D^{* + } \ell ^ - \bar v$$ and $$\bar B \to D^{**} \ell ^ - \bar v$$

Author: T. Siegmund, K. Strahl, Vladislav Balagura, A. Nau, Sergey Semenov, Hermann Kolanoski, P. Pakhlov, P. Križan, S. Werner, C. E. K. Charlesworth, V. Lubimov, A. Golutvin, W. Schmidt-Parzefall, M. Bittner, D. B. MacFarlane, G. Kostina, Mikhail Danilov, C. Hast, J. D. Prentice, A. Lange, P. R. B. Saull, A. Droutskoy, H. Schröder, Manfred Paulini, E.R.F. Hyatt, K. W. Edwards, Yuri Gershtein, R. P. Hofmann, Ivan Belyaev, T. S. Yoon, R. Reiner, Holger Schulz, Peter Krieger, E. Križnič, T. Oest, Werner Hofmann, I. Tichomirov, Michael Schneider, M. Schieber, R. G. Van de Water, R. Waldi, Thomas Hamacher, V. Soloshenko, T. Živko, D. Töpfer, M. Schmidtler, A. Walther, H. Wegener, S. Khan, H. Albrecht, B. Spaan, R. Mundt, W. Funk, T. Podobnik, K. R. Schubert, S. Chechelnitsky, R. Wurth, Yu. Zaitsev, H. Thurn, T. Kirchhoff, K. Tzamariudaki, A. Hüpper, K. Ehret, H. Kapitza, Fedor Ratnikov, R. D. Appuhn, P. Eckstein, S. Weseler, Dave Britton, P. M. Patel, H. Ehrlichmann, J. Spengler, M. Walter, K. Reim, G. Kernel, Rainer Mankel, Sebastian Nowak, D. Wegener, K. T. Knöpfle, J. Stiewe, A. Lindner, D. Reßing, V. Shibaev, and I. V. Gorelov
Subjects: Physics, Argus, Particle physics, Physics and Astronomy (miscellaneous), Meson, Branching fraction, High Energy Physics::Phenomenology, Elementary particle, High Energy Physics::Experiment, Engineering (miscellaneous), computer, Astrophysics::Galaxy Astrophysics, computer.programming_language, Bar (unit)
Abstract: Exclusive semileptonicB decays with aD *+ meson in the final state have been studied using the ARGUS detector at the DORIS II storage ring. The branching ratio for the decay $$\bar B^0 \to D^{* + } \ell ^ - \bar v$$ , where l- is eithere − or μ-, has been measured to be (5.2±0.5±0.6)%. A significant rate for the decay $$\bar B \to D^{**} \ell ^ - \bar v$$ has been observed. From an angular analysis of the cascade $$\bar B^0 \to D^{* + } ( \to D^0 \pi ^ + )\ell ^ - \bar v$$ the forward-backward asymmetryA FB and theD *+ polarization parameter α have been determined to beA FB=0.20±0.08±0.06 and α=1.1±0.4±0.2.
Published: 1993
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41. Observation of a new charmed baryon

Author: P. Krieger, J. D. Prentice, R. Waldi, K. W. Edwards, K. T. Knöpfle, Ivan Belyaev, A. Hüpper, I. Korolko, E. Križnič, P. R. B. Saull, K. Tzamariudaki, K. Strahl, R. Mundt, Vladislav Balagura, V. Lubimov, B. Spaan, J. Stiewe, H. Thurn, K. R. Schubert, A. Snizhko, T. Siegmund, S. Chechelnitsky, Sebastian Nowak, H. Schröder, S. Werner, D. Wegener, D. Töpfer, D. B. Macfarlane, Dmitry Litvintsev, M. Bittner, K. Reim, Thomas Hamacher, H. Wegener, G. Kernel, Dave Britton, K. Ehret, T. Podobnik, H. Kapitza, Holger Schulz, E.R.F. Hyatt, I. Tichomirov, M. Schieber, W. Schmidt-Parzefall, M. Walter, A. Nau, Rainer Mankel, Sergey Semenov, Manfred Paulini, P. M. Patel, Hermann Kolanoski, S. Weseler, C. Hast, C. E. K. Charlesworth, T. Živko, P. Križan, A. Golutvin, R. Eckmann, Yu. Zaitsev, M. Seeger, R. P. Hofmann, H. Ehrlichmann, A. Lange, G. Kostina, T. Kirchhoff, P. Pakhlov, John D. Spengler, M. Schmidtler, R. Reiner, Yu. Gershtein, A. Lindner, Mikhail Danilov, Michael Schneider, H. Albrecht, R. Wurth, A. Droutskoy, A. Kosche, D. Reβing, Werner Hofmann, T. Oest, P. Eckstein, T. S. Yoon, R. G. Van de Water, and S. Khan
Subjects: Nuclear physics, Physics, Baryon, Nuclear and High Energy Physics, Argus, Branching fraction, Electron–positron annihilation, Elementary particle, Charge (physics), DESY, computer, Storage ring, computer.programming_language
Abstract: Using the ARGUS detector at the e+e− storage ring DORIS II at DESY, we have observed a new charmed baryon state in the channel Λc+π+π−. (All references to a specific charged state also imply the charge conjugate state.) The mass of this state was measured to be (2626.6 ± 0.5 ± 1.5) MeV/c2. The product of the production cross section and branching ratio for this channel was determined to be (11.5 ± 2.5 ± 3.0) pb, and the natural width estimated to be smaller than 3.2 MeV/c2 at 90% CL.
Published: 1993
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42. A determination of two Michel parameters in purely leptonic tau decays

Author: D. Reβing, Yu. Gershtein, V. Lubimov, A. Nau, Sergey Semenov, Hermann Kolanoski, K. Reim, Rainer Mankel, K. T. Knöpfle, H. Schröder, S. Weseler, Dave Britton, T. S. Yoon, J. D. Prentice, K. Strahl, Vladislav Balagura, H. Ehrlichmann, C. Hast, H. Kapitza, M. Seeger, A. Lange, M. Schmidtler, A. Lindner, Michael Schneider, M. Schieber, P. Krieger, E.R.F. Hyatt, M. Walter, Andreas Kirchhoff, Ivan Belyaev, R. Waldi, A. Droutskoy, R. Mundt, P. Eckstein, D. O. Litvintsev, D. Töpfer, B. Spaan, W. Funk, H. Thurn, R. G. Van de Water, Holger Schulz, S. Khan, G. Kernel, P. R. B. Saull, T. Živko, Thomas Hamacher, V. Soloshenko, T. Siegmund, P. Pakhlov, R. P. Hofmann, K. R. Schubert, Manfred Paulini, S. Chechelnitsky, K. Tzamariudaki, K. Ehret, W. Schmidt-Parzefall, G. Kostina, C. E. K. Charlesworth, R. Reiner, H. Wegener, P. M. Patel, I. Tichomirov, R. Eckmann, Yu. Zaitsev, T. Podobnik, S. Werner, M. Bittner, A. Hüpper, Fedor Ratnikov, T. Oest, Mikhail Danilov, A. Kosche, Werner Hofmann, A. Snizhko, John D. Spengler, H. Albrecht, R. Wurth, Sebastian Nowak, D. Wegener, E. Križnič, D. B. Macfarlane, P. Križan, A. Golutvin, K. W. Edwards, and J. Stiewe
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Argus, Muon, Electron–positron annihilation, Elementary particle, Electron, Spectral line, Nuclear physics, Momentum, Michel parameters, computer, computer.programming_language
Abstract: Using the ARGUS detector at the e+e− storage ring DORIS II, we have determined the Michel parameters ϱ and ξ of τ → μν ν and τ → eν ν decays. From a data sample with 333 events/pb around s = 10 GeV , we select 3230 events e + e − → τ + τ − → (μ ± μ μ )( e ǂv v ) and determine ϱ from the e and μ momentum spectra and ξ from the correlations between e and μ momenta. For ϱ we obtain ϱτ→e = 0.79 ± 0.08 ± 0.06 and ϱτ→μ = 0.76 ± 0.08 in accordance with the V - A structure of the decays. The momentum correlations are only sensitive to the product ξτ→eξτ→μ. Setting ξτ→e = ξτ→μ, we obtain |ξτ| = 0.90 ± 0.15 ± 0.10 also in accordance with V - A. The updated decay fractions are B(τ → e v v ) = (17.5 ± 0.3 ± 0.5)% and B(τ → μv v ) = (17.4 ± 0.3 ± 0.5)% .
Published: 1993
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43. A partial wave analysis of the decay D0 → KS0π+π−

Author: R. Mundt, J. Stiewe, D. Reßing, H. Thurn, G. Kostina, K. Reim, V. Shibaev, A. Hüpper, V. Lubimov, Rainer Mankel, R. Reiner, A. Nau, Sergey Semenov, Hermann Kolanoski, Holger Schulz, M. Schmidtler, J. Tamminga, A. Walther, D. B. MacFarlane, Fedor Ratnikov, C. Hast, T. Kirchhoff, W. Schmidt-Parzefall, K. R. Schubert, A. Lange, T. Živko, K. T. Knöpfle, A. Droutskoy, R. G. Van de Water, S. Weseler, I. V. Gorelov, I. Tichomirov, S. Khan, K. Ehret, H. Ehrlichmann, P. Pakhlov, Sebastian Nowak, R. P. Hofmann, D. Wegener, T. S. Yoon, E.R.F. Hyatt, Peter Krieger, Mikhail Danilov, K. W. Edwards, John D. Spengler, Ivan Belyaev, H. Albrecht, Werner Hofmann, R. Wurth, K. Strahl, P. R. B. Saull, Vladislav Balagura, C. E. K. Charlesworth, D. Töpfer, Michael Schneider, T. Siegmund, M. Schieber, Manfred Paulini, H. Kapitza, P. M. Patel, A. Lindner, G. Kernel, H. Wegener, Thomas Hamacher, V. Soloshenko, T. Podobnik, M. Walter, T. Oest, H. Schröder, B. Spaan, W. Funk, R. D. Appuhn, K. Tzamariudaki, P. Križan, A. Golutvin, Dave Britton, E. Križnič, P. Murat, R. Waldi, J. D. Prentice, S. Werner, and Yu. Zaitsev
Subjects: Nuclear physics, Physics, Nuclear and High Energy Physics, Particle decay, Pion, Pair production, Meson, Branching fraction, Partial wave analysis, Excited state, Analytical chemistry, Dalitz plot
Abstract: Using the ARGUS detector at the DORIS-II electron-positron storage ring at DESY, we have investigated the exclusive decay D ∗+ → D 0 π + , D 0 → K S 0 π + π − . From a partial wave analysis of the KS0π+π− system we find that (71.8± 4.2 ± 3.0)% are D 0 → K ∗− π + and (22.7 ± 3.2 ± 0.9)% are D 0 → K 0 ϱ 0 with a relative phase of (−137 ± 7 ± 3)° between the channels. The remaining fraction can be described by several channels involving excited resonances, but not by a three-body phase space decay, thus giving first evidence for D0 decays into K 0 ∗ (1430) − π + , K 0 f 0 (1975), K 0 f 2 (1270) , and K 0 f 0 (1400) .
Published: 1993
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44. Inclusive production of η′ (958) andf o (975) mesons in the υ energy region

Author: V. Lubimov, Mikhail Danilov, W. Schmidt-Parzefall, Ivan Belyaev, H. Wegener, T. Podobnik, H. Albrecht, A. Kosche, J. Stiewe, R. P. Hofmann, R. Wurth, T. Oest, D. Reßing, J. Spengler, J. D. Prentice, D. Töpfer, C. Hast, C. E. K. Charlesworth, M. Seeger, T. S. Yoon, A. Lange, Werner Hofmann, D. B. MacFarlane, A. Lindner, I. Tichomirov, G. Kernel, A. Droutskoy, K. Strahl, Vladislav Balagura, T. Siegmund, H. Kapitza, R. D. Appuhn, M. Walter, G. Kostina, R. Waldi, M. Schieber, Michael Schneider, P. Eckstein, R. G. Van de Water, A. Zimmermann, Yu. Zaitsev, S. Werner, M. Bittner, S. Khan, A. Hüpper, R. Reiner, Yu. Gershtein, Manfred Paulini, P. M. Patel, I. V. Gorelov, P. Pakhlov, A. Walther, T. Kirchhoff, Fedor Ratnikov, E.R.F. Hyatt, Dave Britton, H. Schröder, K. W. Edwards, E. Križnič, Thomas Hamacher, V. Soloshenko, V. Shibaev, B. Spaan, W. Funk, A. Nau, K. T. Knöpfle, Sergey Semenov, Peter Krieger, P. R. B. Saull, K. R. Schubert, S. Chechelnitsky, Hermann Kolanoski, K. Ehret, S. Nowack, P. Križan, A. Golutvin, Holger Schulz, D. Wegener, T. Živko, R. Mundt, M. Schmidtler, H. Thurn, K. Reim, Rainer Mankel, S. Weseler, H. Ehrlichmann, and K. Tzamariudaki
Subjects: Physics, Particle physics, Argus, Annihilation, Physics and Astronomy (miscellaneous), Meson, Octet, Electron–positron annihilation, Nuclear physics, Pseudoscalar, Vector meson, Singlet state, Engineering (miscellaneous), computer, computer.programming_language
Abstract: The inclusive production cross sections of η′ (958) andf o (975) mesons are measured ine + e − annihilation in the nonresonant continuum around $$\sqrt s = 10$$ GeV and in decays of the υ resonances using the ARGUS detector. For η′ (958) mesons, a production ratio of η′ (958)/ηdir=0.35±0.24, with ηdir=η−BR(η′→ηX)·η′, is determined in direct υ(1S) decays, which can be partially explained by the pseudoscalar singlet/octet mixing. Forf o (975) production, we obtain a production ratio off o (975)/p(770)°=0.17±0.030 in direct υ(1S) decays. In its production features, thef o (975) behaves like an ordinary meson, though aK $$\bar K$$ molecule nature cannot be excluded. The substantial production yield of thef o (975) meson demonstrates the important effect of feeddown from mesons beyond the basic multiples on pseudoscalar and vector meson production.
Published: 1993
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45. Inclusive production of charged pions, kaons and protons in υ(4S) decays

Author: P. Pakhlov, Leif J. Jönsson, T. Oest, I. V. Gorelov, Holger Schulz, Sebastian Nowak, P. R. B. Saull, E. Križnič, E.R.F. Hyatt, D. Wegener, M. Schmidtler, Mikhail Danilov, K. W. Edwards, H. Schröder, H. Wegener, T. Živko, Werner Hofmann, A. Hüpper, T. Podobnik, V. Shibaev, Manfred Paulini, H. Kapitza, R. G. Van de Water, C. Hast, R. Mundt, Fedor Ratnikov, K. Strahl, Vladislav Balagura, K. T. Knöpfle, Ivan Belyaev, A. Lindner, M. Reidenbach, J. Stiewe, A. Lange, D. Reßing, V. Lubimov, S. Khan, D. Töpfer, K. Tzamariudaki, H. Thurn, Michael Schneider, P. Murat, S. Weseler, M. Walter, H. Ehrlichmann, P. Križan, A. Golutvin, W. Schmidt-Parzefall, H. I. Cronström, D. B. MacFarlane, R. P. Hofmann, A. Hölscher, R. Waldi, T. Siegmund, T. S. Yoon, A. Droutskoy, A. Nau, Sergey Semenov, K. Reim, Peter Krieger, C. E. K. Charlesworth, Hermann Kolanoski, Sally Seidel, S. Werner, Rainer Mankel, J. D. Prentice, Dave Britton, Yu. Zaitsev, B. Spaan, W. Funk, I. Tichomirov, R. D. Appuhn, Thomas Hamacher, V. Soloshenko, A. Walther, John D. Spengler, H. Albrecht, R. Wurth, T. Kirchhoff, K. R. Schubert, K. Ehret, G. Kostina, R. Reiner, M. Schieber, P. M. Patel, and G. Kernel
Subjects: Physics, Argus, Particle physics, Physics and Astronomy (miscellaneous), Meson, Electron–positron annihilation, Nuclear Theory, Hadron, Particle identification, Momentum, Nuclear physics, Pion, High Energy Physics::Experiment, Nuclear Experiment, Engineering (miscellaneous), computer, Storage ring, computer.programming_language
Abstract: Using the detector ARGUS at thee + e − storage ring DORIS II, we have investigated inclusive momentum spectra of charged pions, kaons, and protons from decays of the υ(4S) meson. The kaon spectra have been measured in two independent ways, by coherently exploiting the detector's particle identification capabilities, and by detecting decays in-flight. The extracted mean multiplicities for charged hadrons are 7.17±0.05±0.14 pions, 1.56±0.03±0.05 kaons and 0.110±0.010±0.007 protons per υ(4S) decay, where pions and protons fromK and Δ decays have been subtracted.
Published: 1993
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46. Observation of semileptonic decay

Author: P. Murat, Sally Seidel, R. Waldi, S. Weseler, John D. Spengler, A. Lindner, M. Walter, Holger Schulz, H. Albrecht, J. Stiewe, R. Wurth, H. Ehrlichmann, H. I. Cronström, T. Živko, M. Schieber, B. Spaan, W. Funk, A. Nau, Sergey Semenov, T. Kirchhoff, Hermann Kolanoski, R. Mundt, K. T. Knöpfle, Thomas Hamacher, V. Soloshenko, S. Werner, K. Reim, Mikhail Danilov, P. Krieger, H. Thurn, P. Križan, A. Golutvin, P. R. B. Saull, J. D. Prentice, V. Shibaev, A. Hölscher, R. D. Appuhn, Rainer Mankel, R. P. Hofmann, W. Schmidt-Parzefall, M. Schmidtler, C. Hast, E. Križnič, Manfred Paulini, C. E. K. Charlesworth, H. Schröder, D. Reβing, P. Pakhlov, K. W. Edwards, A. Lange, K. R. Schubert, Werner Hofmann, A. Hüpper, D. B. Macfarlane, Dave Britton, T. Siegmund, I. V. Gorelov, Fedor Ratnikov, M. Reidenbach, A. Walther, K. Ehret, P. M. Patel, G. Kernel, I. Tichomirov, G. Kostina, Yu. Zaitsev, R. Reiner, Michael Schneider, K. Strahl, Vladislav Balagura, V. Lubimov, Ivan Belyaev, D. Töpfer, H. Kapitza, Leif J. Jönsson, A. Droutskoy, T. Oest, E.R.F. Hyatt, H. Wegener, T. Podobnik, Sebastian Nowak, D. Wegener, R. G. Van de Water, S. Khan, K. Tzamariudaki, and T. S. Yoon
Subjects: Semileptonic decay, Physics, Nuclear and High Energy Physics, Argus, Physics::Instrumentation and Detectors, Branching fraction, High Energy Physics::Phenomenology, DESY, Nuclear physics, Baryon, High Energy Physics::Experiment, computer, Storage ring, computer.programming_language
Abstract: Observation of the semileptonic decay of the charmed baryon in the decay channel has been made using the ARGUS detector at the e + e − storage ring DORIS II at DESY. The cross section times branching ratio was found to be .
Published: 1993
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47. Search for rareB meson decays intoD s + mesons

Author: Manfred Paulini, Dave Britton, S. Weseler, B. Spaan, W. Funk, R. D. Appuhn, P. Eckstein, H. Ehrlichmann, M. Walter, K. T. Knöpfle, T. S. Yoon, Holger Schulz, A. Walther, G. Kernel, Peter Krieger, G. Kostina, T. Živko, Sebastian Nowak, K. Reim, D. Wegener, R. Waldi, R. G. Van de Water, Yu. Gershtein, Yu. Zaitsev, I. V. Gorelov, T. Siegmund, S. Werner, Rainer Mankel, R. Mundt, H. Schröder, M. Schmidtler, J. D. Prentice, S. Khan, H. Thurn, Mikhail Danilov, K. Strahl, R. Reiner, Vladislav Balagura, I. Tichomirov, T. Oest, M. Bittner, R. P. Hofmann, P. Pakhlov, K. Tzamariudaki, E. Križnič, H. Wegener, M. Schieber, T. Podobnik, D. B. MacFarlane, P. R. B. Saull, Werner Hofmann, K. R. Schubert, A. Droutskoy, S. Chechelnitsky, J. Stiewe, A. Hüpper, V. Shibaev, P. M. Patel, D. Reßing, Fedor Ratnikov, A. Nau, Sergey Semenov, Hermann Kolanoski, K. Ehret, T. Kirchhoff, P. Križan, A. Golutvin, A. Lindner, John D. Spengler, H. Albrecht, R. Wurth, Thomas Hamacher, V. Soloshenko, E.R.F. Hyatt, K. W. Edwards, C. Hast, A. Lange, Ivan Belyaev, Michael Schneider, D. Töpfer, H. Kapitza, W. Schmidt-Parzefall, C. E. K. Charlesworth, and V. Lubimov
Subjects: Quark, Physics, Argus, Particle physics, Annihilation, Physics and Astronomy (miscellaneous), Meson, Electron–positron annihilation, High Energy Physics::Phenomenology, Resonance, Coupling (probability), Nuclear physics, High Energy Physics::Experiment, B meson, Engineering (miscellaneous), computer, computer.programming_language
Abstract: A search has been performed for rareB meson decays intoD − mesons arising fromb→u transitions,W exchange modes,B + annihilation processes, and decays where theD + is not produced via aW→c $$\bar s$$ quark pair coupling, using the ARGUS detector operating on the Ψ(4S) resonance at thee + e − storage ring DORIS II. Upper limits for individual decay modes are obtained. In addition, from a study ofD + l- correlations an upper limit of BR (B→D + l- X) (90% CL) is determined.
Published: 1993
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48. Analysis of the decayτ - →π - π - π + v τ and determination of thea 1(1260) resonance parameters

Author: S. Werner, K. T. Knöpfle, D. B. MacFarlane, A. Droutskoy, M. Bittner, R. Mundt, A. Walther, Sebastian Nowak, Ivan Belyaev, T. S. Yoon, D. Wegener, J. Stiewe, H. Thurn, John D. Spengler, C. Hast, A. Lindner, A. Lange, D. Reßing, T. Siegmund, Yu. Zaitsev, K. R. Schubert, H. Schröder, S. Chechelnitsky, H. Albrecht, D. Töpfer, Holger Schulz, J. D. Prentice, G. Kernel, B. Spaan, W. Funk, R. Wurth, K. Ehret, H. Wegener, A. Nau, V. Shibaev, T. Živko, R. G. Van de Water, Sergey Semenov, Hermann Kolanoski, S. Khan, G. Kostina, T. Podobnik, W. Schmidt-Parzefall, R. P. Hofmann, K. Strahl, Vladislav Balagura, P. Pakhlov, Peter Krieger, K. Reim, H. Kapitza, C. E. K. Charlesworth, Manfred Paulini, E. Križnič, R. Waldi, Michael Schneider, V. Lubimov, T. Kirchhoff, Dave Britton, I. V. Gorelov, Rainer Mankel, E.R.F. Hyatt, M. Schmidtler, K. W. Edwards, R. D. Appuhn, P. R. B. Saull, P. Eckstein, M. Walter, T. Oest, Thomas Hamacher, V. Soloshenko, S. Weseler, H. Ehrlichmann, R. Reimer, K. Tzamariudaki, P. Križan, A. Golutvin, M. Schieber, P. M. Patel, Mikhail Danilov, Yuri Gershtein, Werner Hofmann, A. Hüpper, Fedor Ratnikov, and I. Tichomirov
Subjects: Physics, Argus, Physics and Astronomy (miscellaneous), Branching fraction, Electron–positron annihilation, Hadron, Dalitz plot, Resonance, Elementary particle, Intermediate state, Atomic physics, Engineering (miscellaneous), computer, computer.programming_language
Abstract: Using the ARGUS detector at the DORIS IIe +e− storage ring we have studied the three-pion hadronic final state in the decay τ- → π-π-π+ v τ. From about 7500 events we conclude that the three-pion system is dominated by theJ P=1+ resonancea 1 (1260) decaying preferentially via ρ0π-. Our data restrict a possible ρπ contribution of three-pion states without intermediate resonances to less than 6% at 95% CL. Fitting a model by Isgur et al. to the data yields $$m_{a_1 } = (1.211 \pm 0.007 \pm _{0.0}^{0.050} ) GeV/c^2 $$ and $$\Gamma _{a_1 } = (0.446 \pm 0.0021 \pm _{0.0}^{0.140} ) GeV/c^2 $$ . The second errors reflect the model dependence of the result. This is the currently most significant determination of thea 1 resonance parameters. The ratio ofS- andD-wave amplitudes for the ρ0π- intermediate state of thea 1 − decay at the nominala 1 − mass was found to beD/S=−0.11±0.02. Using thisD/S ratio we update our former measurement of the parity violating asymmetry parameter $$\gamma _{AV} = 2g_A g_V /(g_A^2 + g_V^2 )$$ to 1.25±0.23± 0.08 0.15 . The branching ratio of the decay τ- → π-π-π+ v τ is determined to be Br(τ- → π-π-π+ v τ)=(6.8±0.1±0.5)%.
Published: 1993
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49. Observation of the decay

Author: H. Schröder, P. R. B. Saull, M. Schieber, J. D. Prentice, K. Strahl, Vladislav Balagura, S. Werner, A. Droutskoy, Ivan Belyaev, P. Pakhlov, Mikhail Danilov, T. S. Yoon, G. Kostina, Manfred Paulini, R. P. Hofmann, I. Tichomirov, A. Walther, A. Linder, R. Reiner, V. Shibaev, K. R. Schubert, C. Hast, M. Walter, R. G. Van de Water, K. Reim, Werner Hofmann, K. W. Edwards, T. Siegmund, Dave Britton, H. Wegener, H. I. Cronström, A. Hüpper, A. Lange, D. Töpfer, P. Krieger, S. Khan, Michael Schneider, K. Ehret, Fedor Ratnikov, T. Podobnik, Holger Schulz, P. Murat, E. Križnič, Rainer Mankel, B. Spaan, W. Funk, T. Kirchhoff, M. Schmidtler, Sebastian Nowak, K. Tzamariudaki, W. Schmidt-Parzefall, R. Waldi, D. Wegener, K. T. Knöpfle, T. Živko, H. Kapitza, C. E. K. Charlesworth, I. V. Gorelov, D. B. Macfarlane, R. D. Appuhn, V. Lubinov, R. Mundt, John D. Spengler, G. Kernel, Leif J. Jönsson, P. Križan, A. Golutvin, H. Albrecht, D. Reβing, H. Thurn, P. M. Patel, J. Stiewe, T. Oest, S. Weseler, R. Wurth, E.R.F. Hyatt, Yu. Zaitsev, H. Ehrlichmann, A. Nau, Sergey Semenov, Hermann Kolanoski, Thomas Hamacher, and V. Soloshenko
Subjects: Physics, Nuclear and High Energy Physics, Argus, Meson, Electron–positron annihilation, Analytical chemistry, Value (computer science), DESY, Excited state, Mass spectrum, Atomic physics, computer, Storage ring, computer.programming_language
Abstract: Using the ARGUS detector at the e + e - storage ring using DORIS II at DESY, we have observed a new decay channel for the excited charm-strange meson D s1 (2536) + →D∗ O K + . The production cross section for the D s 1 (2536) + decaying via this channel is measured to be σ ( D s1 (2536) + )· BR (D sl (2536) + →D∗ 0 K + )= 18±4±3 pb at E CM = 10.4 GeV. The mass of the D s 1 (2536) + is found to be 2535.2 ± 0.5±1.5 MeV/ c 2 in agreement with the value obtained from an analysis of the D s1 (2536) + →D∗ + K 0 s decay channel. The natural width is determined to be less than 3.9 MeV/ c 2 at 90%CL.
Published: 1992
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50. A measurement of the tau mass

Author: G. Kernel, M. Schieber, V. Shibaev, S. Semenov, Leif J. Jönsson, V. Lubimov, H. Schröder, D. Wegener, D. Reβing, R. Wurth, C. Hast, J. Stiewe, T. Oest, P. Križan, G. Kostina, K. Reim, A. Lange, T. Kirchhoff, S. Werner, Michael Schneider, A. Droutskoy, H. Albrecht, H. Wegener, E. Križnič, W. Funk, R. P. Hofmann, M. Schmidtler, T. Podobnik, H.D. Schulz, R. Reiner, J. D. Prentice, Sebastian Nowak, A. Walther, M. Danilov, K. Strahl, Vladislav Balagura, Ivan Belyaev, W. Schmidt-Parzefall, R. Mankel, K. T. Knöpfle, K. R. Schubert, C. E. K. Charlesworth, S. Weseler, I. Tichomirov, P. Murat, D. Töpfer, R. Mundt, R. Waldi, K. W. Edwards, R. D. Appuhn, H. Ehrlichmann, H. Thurn, K. Ehret, P. Krieger, R. G. Van de Water, E.R.F. Hyatt, A. Nau, P. M. Patel, A. Golutvin, H. Kapitza, Hermann Kolanoski, S. Khan, Dave Britton, P. Pakhlov, Yu. Zaitsev, J. Spengler, T. S. Yoon, M. Walter, H. I. Cronström, I. Gorelov, T. Živko, Werner Hofmann, A. Hüpper, K. Tzamariudaki, P. R. B. Saull, F. Ratnikov, A. Lindner, T. Siegmund, Manfred Paulini, B. Spaan, Thomas Hamacher, and V. Soloshenko
Subjects: Nuclear physics, Physics, Nuclear and High Energy Physics, Argus, Particle physics, Electron–positron annihilation, Mass spectrum, computer, Storage ring, Lepton, computer.programming_language
Abstract: Using the ARGUS detector at the DORIS II storage ring, a new measurement of the mass of the τ lepton has been obtained. An analysis of the tau pseudomass spectrum for decays of the type τ− → π−π−π+ντ finds mτ = 1776.3±2.4±1.4 MeV/c2. This result also leads to an improvement of the upper limit on the ντ mass to mντ < 31 MeV/c2 at the 95% confidence level.
Published: 1992
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