A.V. Fedotov
Institute on Taxation and Economic Policy
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Publication
Featured researches published by A.V. Fedotov.
Physics Letters B | 1981
A.E. Asratyan; V.I. Efremenko; A.V. Fedotov; P.A. Goritchev; V.S. Kaftanov; G.K. Kliger; S.P. Krutchinin; M.A. Kubantsev; I.V. Makhlueva; V.I. Shekelian; V.G. Shevchenko; J. P. Berge; D. Bogert; R. Endorf; R. Hanft; J.A. Malko; F.A. Nezrick; R. Orava; V.V. Ammosov; A.G. Denisov; P.F. Ermolov; G.S. Gapienko; V.A. Gapienko; V.I. Klyukhin; V.I. Koreshev; P.V. Pitukhin; V.I. Sirotenko; E.A. Slobodiuk; Z.U. Usubov; V.G. Zaetz
Abstract A search is performed for the antineutrino oscillation process ν μ → ν τ with 15 bubble chamber data. Assuming maximal mixing, we obtain for the neutrino mass difference parameter Δ 16 eV2 the transition probability is found to be less than 0.022 (90% c.1.).
Physics Letters B | 1980
J. P. Berge; D. Bogert; R. Endorf; R. Hanft; J.A. Malko; G.I. Moffatt; F.A. Nezrick; R. Orava; J. Wolfson; V.V. Ammosov; A.G. Denisov; P.F. Ermolov; G.S. Gapienko; V.A. Gapienko; V.I. Klukhin; V.I. Koreshev; P.V. Pitukhin; V.I. Sirotenko; E.A. Slobodyuk; A.A. Volkov; V.I. Efremenko; A.V. Fedotov; P.A. Gorichev; V.S. Kaftanov; G.K. Kliger; V.Z. Kolganov; S.P. Krutchinin; M.A. Kubantsev; I.V. Makhljueva; V.I. Shekeljan
Abstract We investigate the net change in the current fragmentation region in antineutrino-nucleon charged current interactions in the Fermilab 15 ft bubble chamber. Support is presented for the d-quark origin of the forward hadrons in the hadron center-of-mass system. An extrapolation of the net charge to infinite center-of-mass energy is performed giving as a result 〈Q〈 v =− (0.44 ± 0.09) . Combining this result with the result obtained using our v events in the same experiment we obtain the value 0.98 ± 0.15 for the charge difference between the fragmenting quarks in v and v charged current events.
Physics Letters B | 1980
V.V. Ammosov; A.H. Amrakhov; A.G. Denisov; P.F. Ermolov; G.S. Gapienko; V.A. Gapienko; V.I. Klukhin; V.I. Koreshev; P.V. Pitukhin; V.I. Sirotenko; E.A. Slobodyuk; V.G. Zaetz; J. P. Berge; D. Bogert; R. Endorf; R. Hanft; J.A. Malko; G.I. Moffat; F.A. Nezrick; R. Orava; J. Wolfson; V.I. Efremenko; A.V. Fedotov; P.A. Gorichev; V.S. Kaftanov; G.K. Kliger; V.Z. Kolganov; S.P. Krutchinin; M.A. Kubantsev; I.V. Makhljueva
Abstract We have used the ratio between the production rates of K 0 s and π − s in antineutrino-nucleon interactions in the Fermilab 15 ft bubble chamber to measure the size of the SU (3) symmetry violation in the production of quark-antiquark pairs to be 0.27±0.04. This value is significantly larger than the value obtained from a recent ep experiment. There is no apparent dependence of the K 0 π − ratio with W 2 , Q 2 , x b or p T 2 .
Physics Letters B | 1981
V.V. Ammosov; A.G. Denisov; P.F. Ermolov; G.S. Gapienko; V.A. Gapienko; V.I. Klyukhin; V.I. Koreshev; P.V. Pitukhin; V.I. Sirotenko; E.A. Slobodyuk; Z.U. Usubov; V.G. Zaetz; J. P. Berge; D. Bogert; R. Endorf; R. Hanft; J.A. Malko; F.A. Nezrick; R. Orava; V.I. Efremenko; A.V. Fedotov; P.A. Gorichev; V.S. Kaftanov; G.K. Kliger; V.Z. Kolganov; S.P. Krutchinin; M.A. Kubantsev; I.V. Makhlueva; V.I. Shekeljan; V.G. Shevchenko
Abstract The first observation of μ + e + events produced in antineutrino interactions using the Fermilab 15 ft bubble chamber is reported. The relative yield of μ + e + events is (4.8 −3.2 +5.3 ) × 10 −4 of all charged-current events with antineutrino energy greater than 10 GeV. The observed V 0 rate is 1.0 −1.0 +1.2 per μ + e + event. Possible sources of these events are discussed.
Physics Letters B | 1984
A.E. Asratyan; V.I. Efremenko; A.V. Fedotov; P.A. Goritchev; G.K. Kliger; V.Z. Kolganov; S.P. Krutchinin; M.A. Kubantsev; I.V. Makhlueva; V.I. Shekelyan; V.G. Shevchenko; V.V. Ammosov; A.G. Denisov; G.S. Gapienko; V.A. Gapienko; V.I. Klyukhin; V.I. Koreshev; P.V. Pitukhin; V.I. Sirotenko; E.A. Slobodiuk; Z.U. Usubov; V.G. Zaets; J. P. Berge; D. Bogert; R. Hanft; J.A. Malko; F.A. Nezrick; R. Orava
Abstract The total v μ N charged current cross section in the energy interval 10–50 GeV is unfolded from 15 bubble chamber antineutrino data. The method is to isolate the quasielastic events and determine their relative contribution to the overall charged current sample. The scale parameter is found to be (0.29 ± 0.03) × 10−38 cm2 GeV−1. Relevance of the method for neutrino oscillation studies is discussed.
Physics Letters B | 1979
J. P. Berge; D. Bogert; R. Hanft; D. Hamilton; G. Harigel; J.A. Malko; G.I. Moffatt; F.A. Nezrick; J. Wolfson; V.V. Ammosov; A.G. Denisov; P.F. Ermolov; G.S. Gapienko; V.A. Gapienko; V.I. Klukhin; V.I. Koreshev; P.V. Pitukhin; V.I. Sirotenko; E.A. Slobodyuk; V.G. Zaetz; V.I. Efremenko; A.V. Fedotov; P.A. Gorichev; V.S. Kaftanov; G.K. Kliger; V.Z. Kolganov; S.P. Krutchinin; M.A. Kubantsev; I.V. Makhljueva; V.I. Shekeljan
Abstract We have searched for candidates for the weak neutral leptonic current reaction ν μ + e − → ν μ + e − in the Fermilab 15 ft bubble chamber filled with a heavy neon-hydrogen mix. Based on zero observed events of this type we find the 90% confidence level upper limit for the rate for this reaction relative to the total antineutrino charged current rate to be 3.9 × 10 −4 and, in the Weinberg-Salam model, sin 2 θ W ⩽ 0.37.
Physics Letters B | 1979
J.P. Berge; D. Bogert; R. Endorf; R. Hanft; D. Hamilton; G. Harigel; J.A. Malko; G.I. Moffatt; F. Nezrick; W. Smart; J. Wolfson; V.V. Ammosov; A.G. Denisov; P.F. Ermolov; G.S. Gapienko; V.A. Gapienko; V.I. Klukhin; V.I. Koreshev; P.V. Pitukhin; V.I. Sirotenko; E.A. Slobodjuk; V.G. Zaetz; V.I. Efremenko; A.V. Fedotov; P.A. Gorichev; V.S. Kaftanov; G.K. Kliger; V.Z. Kolganov; S.P. Krutchinin; M.A. Kubantsev
Abstract A clear observation of μ + e − events produced in an antineutrino heavy neon-hydrogen experiment using the Fermilab 15 ft bubble chamber is reported. The relative production rate, Vee yield, and scaling variable distributions are presented, and the events are interpreted as charmed particle production from ocean quarks.
Physics Letters B | 1979
V.I. Efremenko; A.V. Fedotov; P.A. Gorichev; V.S. Kaftanov; G.K. Kliger; V.Z. Kolganov; S.P. Krutchinin; M.A. Kubantsev; I.V. Makhlyueva; V.I. Shekeljan; V. Schevchenko; J.P. Berge; D. Bogert; R. Hanft; J.A. Malko; G. Harigel; G.I. Moffatt; F. Nezrick; J. Wolfson; V.V. Ammosov; A.G. Denisov; P.F. Ermolov; G.S. Gapienko; V.A. Gapienko; V.I. Klukhin; V.I. Koreshev; P.V. Pitukhin; V.I. Sirotenko; E. Solovodjuk; V.G. Zaetz
Abstract A search for charmed particle production in anti neutrino-nucleon neutral current interactions is reported. The recognition signature used was positron decay of the charmed particle; however all single positron events found can be attributed to known sources. Based upon a possible singal of one event, the 90% confidence level upper limit for the rate of neutral current charmed particle production with subsequent positron decay relative to charged current interactions above the charm threshold is 1.45×10 −3 . Assuming a branching ratio of 0.1, we find the corresponding limit for the right handed u c coupling is 1.9×10 −2 .
Physics Letters B | 1985
A.E. Asratyan; A.V. Fedotov; P.A. Goritchev; S.P. Krutchinin; M.A. Kubantsev; I.V. Makhlueva; V.I. Shekelyan; V.G. Shevchenko; V.V. Ammosov; V.S. Burtovoy; A.G. Denisov; G.S. Gapienko; V.A. Gapienko; V.I. Klyukhin; V.I. Koreshev; P.V. Pitukhin; V.I. Sirotenko; E.A. Slobodyuk; Z.U. Usubov; V.G. Zaetz
Abstract Evidence is reported for F ∗− antineutrino production with the subsequent radiative decay F ∗− → γ F − . We find 143±18 MeV for the F ∗ − F mass difference.
Physics Letters B | 1984
A.E. Asratyan; V.I. Efremenko; A.V. Fedotov; P.A. Goritchev; G.K. Kliger; V.Z. Kolganov; S.P. Krutchinin; M.A. Kubantsev; I.V. Makhlueva; V.I. Shekelyan; V.G. Shevchenko; V.V. Ammosov; A.G. Denisov; G.S. Gapienko; V.A. Gapienko; V.I. Klyukhin; V.I. Koreshev; P.V. Pitukhin; V.I. Sirotenko; E.A. Slobodyuk; Z.U. Usubov; V.G. Zaetz
Abstract The study of neutral strange particle production in antineutrino-induced neutral current interactions is presented. The total multiplicity of neutral strange particles and the K 0 multiplicity in the current fragmentation region ( z >0.3) are used to estimate in two ways the coupling strength of the weak neutral current to the strange quark.
