E. I. Bunyatova
Joint Institute for Nuclear Research
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Featured researches published by E. I. Bunyatova.
Physics Letters B | 2000
I. G. Alekseev; P. E. Budkovsky; V. P. Kanavets; L. I. Koroleva; B. V. Morozov; V. M. Nesterov; V. V. Ryltsov; D. N. Svirida; A. D. Sulimov; V. V. Zhurkin; Yu. A. Beloglazov; A. I. Kovalev; S. P. Kruglov; D. V. Novinsky; V. A. Shchedrov; V. V. Sumachev; V. Yu. Trautman; N.A. Bazhanov; E. I. Bunyatova
Abstract The ITEP-PNPI Collaboration presents the results of the measurements of the spin rotation parameter A in the elastic scattering of positive and negative pions on protons at Pbeam=1.62 GeV/c. The setup included a longitudinally-polarized proton target with superconductive magnet, multiwire spark chambers and a carbon polarimeter with thick filter. Results are compared with the predictions of partial wave analyses. The experiment was performed at the ITEP proton synchrotron, Moscow.
European Physical Journal A | 2009
I. G. Alekseev; N. A. Bazhanov; Yu. A. Beloglazov; P. E. Budkovsky; E. I. Bunyatova; E. A. Filimonov; V. P. Kanavets; A. I. Kovalev; L. I. Koroleva; B. V. Morozov; V. M. Nesterov; D. V. Novinsky; V. V. Ryltsov; V. A. Shchedrov; A. D. Sulimov; V. V. Sumachev; D. N. Svirida; V. Yu. Trautman; L. S. Zolin
The asymmetry parameter P was measured for the elastic pion-proton scattering in the very backward angular region of
European Physical Journal C | 2006
I. G. Alekseev; N. A. Bazhanov; P. E. Budkovsky; E. I. Bunyatova; V. P. Kanavets; A. I. Kovalev; L. I. Koroleva; S. P. Kruglov; B. V. Morozov; V. M. Nesterov; D. V. Novinsky; V. V. Ryltsov; V. A. Shchedrov; A. D. Sulimov; V. V. Sumachev; D. N. Svirida; V. Yu. Trautman; V. V. Zhurkin
theta_{{rm CM}}^{}
Proceedings of the 17th International Spin Physics Symposium | 2007
I. G. Alekseev; N. A. Bazhanov; Yu. A. Beloglazov; P. E. Budkovsky; E. I. Bunyatova; E. A. Filimonov; V. P. Kanavets; L. I. Koroleva; A. I. Kovalev; S. P. Kruglov; B. V. Morozov; V. M. Nesterov; D. V. Novinsky; V. V. Ryltsov; V. A. Shchedrov; A. D. Sulimov; V. V. Sumachev; D. N. Svirida; V. Yu. Trautman; V. V. Zhurkin; L. S. Zolin
Nuclear Instruments and Methods in Physics Research | 1984
Yu. F. Kiselev; V.V. Polyakov; A. I. Kovalev; E. I. Bunyatova; N. S. Borisov; V. Yu. Trautman; K. Werner; N. G. Kozlenko
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SIXTH INTERNATIONAL CONFERENCE ON PERSPECTIVES IN HADRONIC PHYSICS | 2008
V. V. Sumachev; Yu. A. Beloglazov; E. A. Filimonov; A. I. Kovalev; N. G. Kozlenko; S. P. Kruglov; A. A. Kulbardis; I. V. Lopatin; D. V. Novinsky; V. A. Shchedrov; V. Yu. Trautman; I. G. Alekseev; P. E. Budkovsky; V. P. Kanavets; L. I. Koroleva; B. V. Morozov; V. M. Nesterov; V. V. Ryltsov; A. D. Sulimov; D. N. Svirida; N. A. Bazhanov; E. I. Bunyatova
150 - 170° at several pion beam energies in the invariant-mass range containing most of the pion-proton resonances. The general goal of the experimental program was to provide new data for partial wave analyses in order to resolve their uncertainties in the baryon resonance region to allow the unambiguous baryon spectrum reconstructions. Until recently the parameter P was not measured in the examined domain that might be explained by the extremely low cross-section. At the same time the predictions of various partial wave analyses are far from agreement in some kinematic areas and specifically those areas were chosen for the measurements where the disagreement is most pronouncing. The experiment was performed at the ITEP U-10 proton synchrotron, Moscow, by the ITEP-PNPI Collaboration in the latest 5 years.
Physics of Atomic Nuclei | 2005
Yu. A. Beloglazov; A. I. Kovalev; S. P. Kruglov; D. V. Novinsky; V. V. Sumachev; V. Yu. Trautman; E. A. Filimonov; V. A. Shchedrov; I. G. Alekseev; P. E. Budkovsky; V. V. Zhurkin; V. P. Kanavets; L. I. Koroleva; B. V. Morozov; V. M. Nesterov; V. V. Ryltsov; D. N. Svirida; A. D. Sulimov; N. A. Bazhanov; E. I. Bunyatova
Abstract.The ITEP-PNPI collaboration presents new results of the measurements of the spin rotation parameter A in the elastic scattering of negative pions on protons at Pbeam = 1.43 GeV/c. The results are compared to the predictions of several partial wave analyses. The experiment was performed at the ITEP proton synchrotron, Moscow.
arXiv: High Energy Physics - Experiment | 2004
I. G. Alekseev; N. A. Bazhanov; P. E. Budkovsky; E. I. Bunyatova; V. P. Kanavets; A. I. Kovalev; L. I. Koroleva; S. P. Kruglov; B. V. Morozov; V. M. Nesterov; D. V. Novinsky; V. V. Ryltsov; V. A. Shchedrov; A. D. Sulimov; V. V. Sumachev; D. N. Svirida; V. Yu. Trautman; V. V. Zhurkin
Latest results by the ITEP‐PNPI collaboration on the asymmetry in the π+p elastic scattering are presented. The data were obtained for the first time in the region of backward angles with low cross section, where the predictions of the partial wave analyses are not reliable. The results at 1.94 GeV/c are in favor of the older KH80 analysis and show noticeable deviation from the latest FA06 solution by GWU group. At 2.07 GeV/c very low cross section did not allow to achieve good accuracy. Yet the data do not follow any of the PWA predictions and definitely disagree with SP06 analysis.
Physics of Atomic Nuclei | 2004
Yu. A. Beloglazov; A. I. Kovalev; S. P. Kruglov; D. V. Novinsky; V. V. Sumachev; V. Yu. Trautman; V. A. Shchedrov; I. G. Alekseev; P. E. Budkovsky; V. V. Zhurkin; V. P. Kanavets; L. I. Koroleva; B. V. Morozov; V. M. Nesterov; V. V. Ryltsov; D. N. Svirida; A. D. Sulimov; N. A. Bazhanov; E. I. Bunyatova
Abstract A frozen polarised deuteron target based on ethanediol with a high percentage of deuterium is described. Analytical expressions for the NMR spectrum correction for non-linearity of the Q-meter are obtained and a method for the determination of the asymmetry is developed. Experimental results confirm the thermal mixing theory for deuteron and proton spin systems with a dipole-dipole reservoir of electron spins.
SPIN 2002: 15th International Spin Physics Symposium and Workshop on Polarized Electron Sources and Polarimeters | 2003
I. G. Alekseev; P. E. Budkovsky; V. P. Kanavets; L. I. Koroleva; B. V. Morozov; V. M. Nesterov; V. V. Ryltsov; D. N. Svirida; A. D. Sulimov; V. V. Zhurkin; Yu. A. Beloglazov; A. I. Kovalev; S. P. Kruglov; D. V. Novinsky; V. A. Shchedrov; V. V. Sumachev; V. Yu. Trautman; N. A. Bazhanov; E. I. Bunyatova
The existing models of baryons usually predict considerably more resonance (three or more in number) than it was found by investigation of elastic pion‐nucleon scattering. This disagreement invites further investigation of the pion‐nucleon interaction and among other things the measurement of spin rotation parameters A and R in the elastic pion‐nucleon scattering.Recent experiments of the PNPI and PNPI‐ITEP collaborations resolved a part of twofold ambiguities of the existing partial wave analyses (PWA). These results were used in the last PWA of the George Washington University group SP06. The proposal for the additional spin rotation parameters A and R measurement in the resonance region is motivated. Such additional measurements are necessary to resolve remaining twofold ambiguities of the existing PWAs.
