N.G. Fadeev
Joint Institute for Nuclear Research
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Featured researches published by N.G. Fadeev.
Physics Letters B | 1985
G. Bari; R. Kopp; G. Bruni; P. Rich-Hennion; W. Lohmann; F.L. Navarria; K.M. Teichert; I. Savin; N.G. Fadeev; S. Nemecek; G. Sultanov; I. Golutvin; V. Kukhtin; M. Cribier; I. Veres; D. Jamnik; A.C. Benvenuti; M.Yu. Kazarinov; Y. Sacquin; P. Reimer; K. Deiters; R. Tirler; P. Todorov; J. Cvach; M. Virchaux; W.D. Nowak; C. Zupancic; U. Meyer-Berkhout; A. Volodko; J. Strachota
Abstract New data is presented on the ratios of structure functions F 2 ( x , Q 2 ) measured in deep inelastic muon scattering with deuterium, nitrogen, and iron targets. The existence of nuclear effects at large Q 2 is confirmed with improved systematic accuracy. The ratio F 2 Fe ( x ) F 2 D 2 ( x ) covers the range 0.20 ⩽ x ⩽ 0.70 and is in agreement with earlier measurements. The ratio F 2 N 2 ( x )/ F 2 D 2 ( x ) is measured over the range 0.08 ⩽ x ⩽ 0.70 and is compatible with unity below x = 0.3.
Physics Letters B | 1987
A.C. Benvenuti; G. Bruni; P. Zavada; P. Rich-Hennion; W. Lohmann; F.L. Navarria; K.M. Teichert; I. Savin; N.G. Fadeev; S. Nemecek; G. Sultanov; I. Golutvin; V. Kukhtin; M. Cribier; I. Veres; D. Jamnik; M.Yu. Kazarinov; P. Reimer; K. Deiters; R. Tirler; P. Todorov; J. Cvach; M. Virchaux; C. Zupancic; U. Meyer-Berkhout; Y. Sacquin; J. Strachota; A. Volodko; D. Bollini; L. Piemontese
Abstract New Results are presented on nuclear effects in deep inelastic muon scattering on deuterium and iron targets at large Q 2 . The ratio F Fe 2 (x) F D 2 2 (x) measured in the kinematic range 0.06⩽ x ⩽0.70, 14GeV 2 ⩽ Q 2 ⩽70 GeV 2 is in good agreement with earlier measurements in the region of x > 0.25. At lower x , the structure function ratio exhibits an enhancement of ≈5%.
Physics Letters B | 1987
A. C. Benvenuti; M. Bozzo; R. Kopp; F.L. Navarria; G. Bruni; P. Rich-Hennion; W. Lohmann; D. Schinzel; K.M. Teichert; I. Savin; N.G. Fadeev; P. Verrecchia; G. Sultanov; I. Golutvin; V.S. Kiselev; D. Jamnik; A. Milsztajn; P. Reimer; R. Tirler; P. Todorov; J. Cvach; M. Virchaux; H. Gennow; C. Zupancic; U. Meyer-Berkhout; Y. Sacquin; J. Strachota; A. Volodko; D. Bollini; L. Piemontese
Abstract We present results from a high statistics study of the nucleon structure function F 2 ( x , Q 2 ) measured in deep inelastic scattering of muons on carbon in the kinematic range 0.25⩽ x ⩽0.80 and Q 2 ⩾25 GeV 2 . The analysis is based on 1.5×10 6 reconstructed events recorded at beam energies of 120, 200 and 280 GeV. R = σ L / σ T is found to be independent of x in the range 0.25⩽ x ⩽0.07 and 40 GeV 2 ⩽ Q 2 ⩽200 GeV 2 with a mean value R =0.015±0.013 ( stat ) ±0.026 (syst.).
Physics Letters B | 1983
A. Argento; A. C. Benvenuti; D. Bollini; T. Camporesi; G. Heiman; L. Monari; F. L. Navarria; M. Bozzo; R. Brun; H. Gennow; M. Goossens; R. Kopp; W.D. Nowak; L. Piemontese; J E Pilcher; D. Schinzel; G. Vesztergombi; D.Yu. Burdin; J. Cvach; N.G. Fadeev; I. Golutvin; Y. Kiryushin; V.S. Kisselev; Matthew Henry Klein; A. Kondor; V.G. Krivokhizhin; V. Kukhtin; I. Savin; G.I. Smirnov; P. Todorov
At the CERN SPS we have measured a deep inelastic μ± cross section asymmetry at momentum transfers Q2 ranging from 15 to 180GeV2. The result is in quantitative agreement with the WS/GIM standard electroweak model and allows to determine the muon neutral current couplings.
Physics Letters B | 1981
D. Bollini; P.L. Frabetti; G. Heiman; L. Monari; F.L. Navarria; A. C. Benvenuti; M. Bozzo; R. Brun; H. Gennow; M. Goossens; R. Kopp; F. Navach; L. Piemontese; J E Pilcher; D. Schinzel; D.Yu. Bardin; J. Cvach; N.G. Fadeev; I. Golutvin; Y. Kiryushin; V.S. Kisselev; Matthew Henry Klein; V.G. Krivokhizhin; V. Kukhtin; W.-D. Nowak; I. Savin; G.I. Smirnov; G. Vestergombi; A. Volodko; J. Žáček
Abstract Deep inelastic scattering cross sections have been measured with the CERN SPS muon beam at incident energies of 120 and 200 GeV. Approximately 100 000 events at each energy are used to obtain the structure function F 2 ( x , Q 2 ) in the kinematic region 0.3 x 2 Q 2 2 .
Physics Letters B | 1984
A. Argento; A. C. Benvenuti; D. Bollini; G. Bruni; T. Camporesi; G. Heiman; L. Monari; F. L. Navarria; M. Bozzo; K. Deiters; H. Gennow; M. Goossens; W.D. Nowak; L. Piemontese; A. Staude; D.Yu. Bardin; J. Cvach; N.G. Fadeev; I. Golutvin; Y. Kiryushin; V.S. Kisselev; Matthew Henry Klein; A. Kondor; V.G. Krivokhizhin; V. Kukhtin; I. Savin; G.I. Smirnov; J. Strachota; G. Sultanov; P. Todorov
Abstract The interference structure function xG 3 ( x ) has been measured for the first time scattering positive and negative muons of opposite helicity off a carbon target. The x dependence observed for Q 2 between 40 and 180 (GeV/c 2 ) is in good agreement with predictions of the quark-parton model. The measured ratio 2( a u Q u + a d Q d )/( Q u 2 + Q d 2 = 1.87 ± 0.25 (stat.) ± 0.24 (syst.) is consistent with the hypothesis of fractional quark charges and determines the sign of Q u − Q d to be positive.
Physics Letters B | 1985
A. C. Benvenuti; D. Bollini; G. Bruni; T. Camporesi; G. Heiman; L. Monari; F.L. Navarria; A. Argento; M. Bozzo; H. Gennow; M. Goosens; W.D. Nowak; L. Piemontese; G. Vesztergombi; R. Voss; S.P. Baranov; D.Yu. Bardin; N.G. Fadeev; N. Gagunashvili; I. Golutvin; V.F. Grushin; A.A. Komar; V.G. Krivokhizhin; V. Kukhtin; I. Savin; A.A. Shikanyan; G.I. Smirnov; J. Strachota; E.V. Telyukov; A. Volodko
Abstract In deep inelastic interactions of 200 GeV muons with a carbon target, we have found 17 events of the type μ ± N→ μ ± μ ∓ μ ∓ X (“wrong-sign” dimuons). We derive upper limits of 1.2% (90% CL) on D 0 - D 0 transitions (mixing) or, alternatively, of 9 pb (90% CL) cross section for B B pair production as possible sources of such events.
Physics Letters B | 1972
V.K. Birulev; N.G. Fadeev; L.B. Golovanov; I. Golutvin; N.N. Govorun; T.S. Grigalashivili; B. Guskov; I.M. Ivanchenko; V. Kukhtin; G. Kish; V.G. Krivokhizhin; M. F. Likhachev; A.L. Lyubimov; V.L. Mazarsky; A.A. Mitin; E. Nagy; V. D. Peshekhonov; Yu.I. Salomatin; I. Savin; L. V. Silvestrov; V.E. Simonov; D. Smolin; G.G. Takhtamyshev; P. Todorov; L. Urban; G. Vestergombi; A.S. Vovenko; Y. Zanevsky
Abstract The measurements of the transmission regeneration amplitude on hydrogen in the momentum region of 14–42 GeV/c indicate that in accordance with the Pomeranchuk theorem its magnitude |ƒ° − ƒ °|/k decreases as energy increases and its phase is approximately constant and equal to arg (ƒ° − ƒ °) = (−118 ± 13)° .
European Physical Journal C | 1985
R. Kopp; A. Argento; A. C. Benvenuti; D. Bollini; G. Bruni; T. Camporesi; M. Cribier; J. Cvach; N.G. Fadeev; J. Feltesse; I. Golutvin; M. Goossens; G. Heiman; D. Jamnik; Y. Kiryushin; V.S. Kisselev; Matthew Henry Klein; V.G. Krivokhizhin; V. Kukhtin; W. Lohmann; U. Meyer-Berkhout; A. Milsztajn; L. Monari; Francesco Navarria; W.D. Nowak; A. Ouraou; L. Piemontese; P. Rich-Hennion; Y. Sacquin; I. Savin
The energy-loss spectrum of high energy muons after traversal of a 10 meter iron degrader has been measured with an accuracy of better than 1%. Data taken at energies between 50 and 120 GeV are in agreement with predictions from a Monte Carlo program based on the most recent theoretical descriptions of all relevant processes. The stopping power calculated by this program deviates up to several percent from earlier calculations.
Physics Letters B | 1982
N.G. Fadeev; I. Savin; V.V. Sanadze; N.B. Skachkov
Abstract The values of the moments of the structure function F μ N 2 ( x , Q 2 ) measured by the BCDMS collaboration at CERN in the interval of Q 2 =30–110 GeV 2 are analysed by means of the perturbative QCD singlet formula. The value of Λ giving the best description of the data is found to be Λ MS≅70MeV.
