The Baksan underground scintillation telescope

Alekseev, E. N.; Alekseeva, L. N.; Bakatanov, V. N.; Boliev, M. M.; Voevodskii, A. V.; Doguzhaev, V. A.; Zakidyshev, V. N.; Kozyarivskii, V.A.; Novoseltsev, Yu. F.; Novosel'Tseva, R. N.; Poddubnyi, V. Ya.; Petkov, V. Ya.; Suvorova, O. V.; Tsyabuk, A. K.; Chudakov, A. E.

doi:10.1134/1.953069

Cited by 51 publications

(49 citation statements)

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“…These approaches are beyond the scope of the present paper and we only point out some papers [27,28,29,30,31,32] dealing with the nonperturbative contributions to the running coupling.…”

mentioning

confidence: 99%

Strong Coupling Constant to Four Loops in the Analytic Approach to QCD

Алексеев

2003

Few-Body Systems

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The QCD analytic running coupling α an which has no nonphysical singularities for all Q 2 > 0 is considered for the initial perturbation theory approximations up to four loop order. The finiteness of the analytic coupling at zero is shown to be a consequence of the asymptotic freedom property of the initial theory. The nonperturbative contributions to the analytic coupling are extracted explicitly. For all Q > Λ they are represented in the form of an expansion in inverse powers of Euclidean momentum squared. The effective method for a precise calculation of the analytic running coupling is developed on the basis of the stated expansion. The energy scale evolution of the analytic running coupling for the one-to fourloop cases is studied and the higher loop stability and low dependence on the quark threshold matching conditions in comparison with the perturbative running coupling were found. Normalizing the analytic running coupling at the scale of the rest mass of the Z boson with the world average value of the strong coupling constant, α an (M 2 Z ) = 0.1181 ± 0.002, one obtains as a result of the energy scale evolution of the analytic running coupling α an (M 2 τ ) = 0.2943−0.0106 that is notably lower than the estimations of the coupling strength available at the scale of the mass of the τ lepton.

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“…These approaches are beyond the scope of the present paper and we only point out some papers [27,28,29,30,31,32] dealing with the nonperturbative contributions to the running coupling.…”

mentioning

confidence: 99%

Strong Coupling Constant to Four Loops in the Analytic Approach to QCD

Алексеев

2003

Few-Body Systems

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“…The BUST [1] is a liquid scintillation detector whose major purpose is the investigation of cosmic ray muons and neutrinos. To shield cosmic ray background, the BUST experiment is located in an excavation under the slope of Mt.…”

Section: Detector and Measurementsmentioning

confidence: 99%

Measuring Muon-Induced Fast Neutrons at the Baksan Underground Scintillation Telescope

Boliev

Dzaparova

Kochkarov

et al. 2017

J. Phys.: Conf. Ser.

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“…This complete work had great impact on resonance parametrizations used in various transport models (GiBUU [15,16] and UrQMD [17]). Since then new experimental data became available in the π − p → π 0 π 0 n channel from the Crystal Ball collaboration (349 611 events at the energy range W = 1213-1527 GeV [18]) and in the π − p → π + π − n channel from the CHAOS collaboration (20 kevents, low energies, W = 1257-1302 GeV, [19]) and from ITEP (40 kevents, high energy W = 2060 GeV [20]). The database for π + π − in the energy range W = 1.3-2.0 GeV remains scarce and often lack differential distributions.…”

Section: World Pion-beam Datamentioning

confidence: 99%

Production and decay of baryonic resonances in pion induced reactions

Przygoda

2016

EPJ Web Conf.

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Abstract. Pion induced reactions give unique opportunities for an unambiguous description of baryonic resonances and their coupling channels. A systematic energy scan and high precision data, in conjunction with a partial wave analysis, allow for the study of the excitation function of the various contributions. A review of available world data unravels strong need for modern facilities delivering measurements with a pion beam. Recently, HADES collaboration collected data in pion-induced reactions on light ( 12 C) and heavy ( 74 W) nuclei at a beam momentum of 1.7 GeV/c dedicated to strangeness production. Probing baryon resonancesOne of the key issues in the research of nature over the years was the investigation of baryon resonances, i.e. short-lived excited states of nucleons. From experimental point of view a resonance manifests as a peak located around a certain energy in differential cross section. Its composite nature is probed in scattering experiments and is characterized not only by the complex pole position of the scattering amplitude but also by the couplings to the various channels and hence decay branching ratios. Particularly the important region of 1-2 GeV is occupied by light-flavoured baryons. Such baryons are built out of three quarks (u, d, s) with possible spin either 1/2 or 3/2. Accounting for orbital motion, a supermutiplet SU (6) ) lies in the fact that missing states can couple weakly to the Nπ channel, which is a predominant source of knowledge about baryon properties. Additional difficulty stems from the fact that resonance spectral functions are usually quite broad and various resonances overlap. This challenge triggered great experimental effort resulting in collection of high precision and quality data in meson photo-and electroproduction [6]. In contrary

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The Baksan underground scintillation telescope

Cited by 51 publications

References 0 publications

Strong Coupling Constant to Four Loops in the Analytic Approach to QCD

Strong Coupling Constant to Four Loops in the Analytic Approach to QCD

Measuring Muon-Induced Fast Neutrons at the Baksan Underground Scintillation Telescope

Production and decay of baryonic resonances in pion induced reactions

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