V. Vasiliev

Publications (11)11 Total impact

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  Available from: Luis Serra

  Article: Probing new physics models of neutrinoless double beta decay with SuperNEMO

  R. Arnold, C. Augier, J. Baker, A. S. Barabash, A. Basharina-Freshville, M. Bongrand, V. Brudanin, A. J. Caffrey, S. Cebrián, A. Chapon, [......], V. Tretyak, V. I. Tretyak, V. I. Umatov, I. A. Vanyushin, R. Vasiliev, V. Vasiliev, V. Vorobel, D. Waters, N. Yahlali, A. Žukauskas
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  ABSTRACT: The possibility to probe new physics scenarios of light Majorana neutrino exchange and right-handed currents at the planned next generation neutrinoless double β decay experiment SuperNEMO is discussed. Its ability to study different isotopes and track the outgoing electrons provides the means to discriminate different underlying mechanisms for the neutrinoless double β decay by measuring the decay half-life and the electron angular and energy distributions.
  European Physical Journal C 04/2012; 70(4):927-943. · 3.63 Impact Factor
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  Available from: Vera Eduardovna Kovalenko

  Article: Measurement of the ββ decay half-life of 130Te with the NEMO-3 detector.

  R Arnold, C Augier, J Baker, A S Barabash, A Basharina-Freshville, S Blondel, M Bongrand, G Broudin-Bay, V Brudanin, A J Caffrey, [......], V Timkin, S Torre, V I Tretyak, V Umatov, L Vála, I Vanyushin, V Vasiliev, V Vorobel, Ts Vylov, A Zukauskas
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  ABSTRACT: We report results from the NEMO-3 experiment based on an exposure of 1275 days with 661 g of (130)Te in the form of enriched and natural tellurium foils. The ββ decay rate of (130)Te is found to be greater than zero with a significance of 7.7 standard deviations and the half-life is measured to be T(½)(2ν) = [7.0 ± 0.9(stat) ± 1.1(syst)] × 10(20) yr. This represents the most precise measurement of this half-life yet published and the first real-time observation of this decay.
  Physical Review Letters 08/2011; 107(6):062504. · 7.37 Impact Factor
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  Available from: Abdellatif Nachab

  Article: Measurement of the Double Beta Decay Half-life of 130Te with the NEMO-3 Detector

  R Arnold, C. Augier, J. Baker, A. S. Barabash, A. Basharina-Freshville, S. Blondel, M. Bongrand, G. Broudin-Bay, V. Brudanin, A. J. Caffrey, [......], V. Timkin, S Torre, V. I. Tretyak, V. Umatov, L. Vála, I. Vanyushin, V. Vasiliev, V. Vorobel, T. Vylov, A. Zukauskas
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  ABSTRACT: This Letter reports results from the NEMO-3 experiment based on an exposure of 1275 days with 661g of 130Te in the form of enriched and natural tellurium foils. The double beta decay rate of 130Te is found to be greater than zero with a significance of 7.7 standard deviations and the half-life is measured to be T1/2 = (7.0 +/- 0.9(stat) +/- 1.1(syst)) x 10^{20} yr. This represents the most precise measurement of this half-life yet published and the first real-time observation of this decay.
  04/2011;
• Article: Measurement of the Double Beta Decay Half-life of 130Te with the NEMO-3 Detector

  R. Arnold, C. Augier, J. Baker, A. S. Barabash, A. Basharina-Freshville, S. Blondel, M. Bongrand, G. Broudin-Bay, V. Brudanin, A. J. Caffrey, [......], V. Timkin, S. Torre, V. I. Tretyak, V. Umatov, L. Vála, I. Vanyushin, V. Vasiliev, V. Vorobel, T. Vylov, A. Zukauskas
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  ABSTRACT: This Letter reports results from the NEMO-3 experiment based on an exposure of 1275 days with 661g of 130Te in the form of enriched and natural tellurium foils. The double beta decay rate of 130Te is found to be greater than zero with a significance of 7.7 standard deviations and the half-life is measured to be T1/2 = (7.0 +/- 0.9(stat) +/- 1.1(syst)) x 10^20 yr. This represents the most precise measurement of this half-life yet published and the first real-time observation of this decay.
  04/2011; 4:128-131.
• Source

  Available from: Abdellatif Nachab

  Article: Measurement of the two neutrino double beta decay half-life of Zr-96 with the NEMO-3 detector

  J. Argyriades, R Arnold, C. Augier, J. Baker, A. S. Barabash, A. Basharina-Freshville, M. Bongrand, G. Broudin-Bay, V. Brudanin, A. J. Caffrey, [......], G. Szklarz, J Thomas, V. Timkin, V. I. Tretyak, V. Umatov, L. Vala, I. Vanyushin, V. Vasiliev, V. Vorobel, Ts. Vylov
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  ABSTRACT: Using 9.4 g of Zr-96 and 1221 days of data from the NEMO-3 detector corresponding to 0.031 kg yr, the obtained 2vbb decay half-life measurement is [2.35 +/- 0.14(stat) +/- 0.16(syst)] x 10^19 yr. Different characteristics of the final state electrons have been studied, such as the energy sum, individual electron energy, and angular distribution. The 2v nuclear matrix element is extracted using the measured 2vbb half-life and is 0.049 +/- 0.002. Constraints on 0vbb decay have also been set. Comment: Published in Nucl.Phys.A (10 pages, 10 figures)
  06/2009;
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  Available from: Abdellatif Nachab

  Article: Measurement of double beta decay of 100Mo to excited states in the NEMO 3 experiment

  R Arnold, C. Augier, J. Baker, A. S. Barabash, M. Bongrand, G. Broudin, V. Brudanin, A. J. Caffrey, V. Egorov, A.I. Etienvre, [......], G. Szklarz, J Thomas, V. Timkin, V. Tretyak, V. Umatov, L. V'ala, I. Vanyushin, V. Vasiliev, V. Vorobel, Ts. Vylov
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  ABSTRACT: The double beta decay of 100Mo to the 0^+_1 and 2^+_1 excited states of 100Ru is studied using the NEMO 3 data. After the analysis of 8024 h of data the half-life for the two-neutrino double beta decay of 100Mo to the excited 0^+_1 state is measured to be T^(2nu)_1/2 = [5.7^{+1.3}_{-0.9}(stat)+/-0.8(syst)]x 10^20 y. The signal-to-background ratio is equal to 3. Information about energy and angular distributions of emitted electrons is also obtained. No evidence for neutrinoless double beta decay to the excited 0^+_1 state has been found. The corresponding half-life limit is T^(0nu)_1/2(0^+ --> 0^+_1) > 8.9 x 10^22 y (at 90% C.L.). The search for the double beta decay to the 2^+_1 excited state has allowed the determination of limits on the half-life for the two neutrino mode T^(2nu)_1/2(0^+ --> 2^+_1) > 1.1 x 10^21 y (at 90% C.L.) and for the neutrinoless mode T^(0nu)_1/2(0^+ --> 2^+_1) > 1.6 x 10^23 y (at 90% C.L.).
  10/2006;
• Article: Measurement of the double-β decay half-life of 150Nd and search for neutrinoless decay modes with the NEMO-3 detector

  J. Argyriades, R. Arnold, C. Augier, J. Baker, A. S. Barabash, A. Basharina-Freshville, M. Bongrand, G. Broudin, V. Brudanin, A. J. Caffrey, [......], G. Szklarz, J. Thomas, V. Timkin, V. Tretyak, V. Umatov, L. Vála, I. Vanyushin, V. Vasiliev, V. Vorobel, Ts. Vylov
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  ABSTRACT: The half-life for double-β decay of 150Nd has been measured by the NEMO-3 experiment at the Modane Underground Laboratory. Using 924.7 days of data recorded with 36.55 g of 150Nd, we measured the half-life for 2νββ decay to be T1/22ν=(9.11-0.22+0.25(stat.)±0.63(syst.))×1018 yr. The observed limit on the half-life for neutrinoless double-β decay is found to be T1/20ν>1.8×1022 yr at 90% confidence level. This translates into a limit on the effective Majorana neutrino mass of 〈mν〉<4.0-6.3 eV if the nuclear deformation is taken into account. We also set limits on models involving Majoron emission, right-handed currents, and transitions to excited states.
  Phys. Rev. C. 80(3).
• Article: Measurement of the two neutrino double beta decay half-life of Zr-96 with the NEMO-3 detector

  J. Argyriades, R Arnold, C. Augier, J. Baker, A. S. Barabash, A. Basharina-Freshville, M. Bongrand, G. Broudin-Bay, V. Brudanin, A. J. Caffrey, [......], G. Szklarz, J Thomas, V. Timkin, V. I. Tretyak, V. Umatov, L. Vála, I. Vanyushin, V. Vasiliev, V. Vorobel, Ts. Vylov
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  ABSTRACT: Using 9.4 g of 96Zr isotope and 1221 days of data from the NEMO-3 detector corresponding to 0.031 kg y, the obtained 2νββ decay half-life measurement is View the MathML source. Different characteristics of the final state electrons have been studied, such as the energy sum, individual electron energy, and angular distribution. The 2ν nuclear matrix element is extracted using the measured 2νββ half-life and is M2ν=0.049±0.002. Constraints on 0νββ decay have also been set.
  Nuclear Physics A.
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  Available from: Abdellatif Nachab

  Article: Measurement of the double-β decay half-life of 150Nd and search for neutrinoless decay modes with the NEMO-3 detector

  J. Argyriades, R Arnold, C. Augier, J. Baker, A. S. Barabash, A. Basharina-Freshville, M. Bongrand, G. Broudin, V. Brudanin, A. J. Caffrey, [......], G. Szklarz, J Thomas, V. Timkin, V. Tretyak, V. Umatov, L. Vala, I. Vanyushin, V. Vasiliev, V. Vorobel, Ts. Vylov
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  ABSTRACT: The half-life for double-β decay of 150Nd has been measured by the NEMO-3 experiment at the Modane Underground Laboratory. Using 924.7 days of data recorded with 36.55 g of 150Nd, we measured the half-life for 2νββ decay to be T 2ν 1/2 = (9.11+0.25 −0.22(stat.) ± 0.63(syst.)) × 1018 yr. The observed limit on the half-life for neutrinoless double-β decay is found to be T 0ν 1/2 > 1.8 × 1022 yr at 90% confidence level. This translates into a limit on the effective Majorana neutrino mass of (mν ) < 4.0–6.3 eV if the nuclear deformation is taken into account. We also set limits on models involving Majoron emission, right-handed currents, and transitions to excited states.
  Physical Review C.
• Source

  Available from: Abdellatif Nachab

  Article: Measurement of double beta decay of 100Mo to excited states in the NEMO 3 experiment

  R. Arnold, C. Augier, J. Baker, A.S. Barabash, M. Bongrand, G. Broudin, V. Brudanin, A.J. Caffrey, V. Egorov, A.I. Etienvre, [......], G. Szklarz, J. Thomas, V. Timkin, V. Tretyak, V. Umatov, L. Vála, I. Vanyushin, V. Vasiliev, V. Vorobel, Ts. Vylov
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  ABSTRACT: The double beta decay of 100Mo to the and excited states of 100Ru is studied using the NEMO 3 data. After the analysis of 8024 h of data the half-life for the two-neutrino double beta decay of 100Mo to the excited state is measured to be . The signal-to-background ratio is equal to 3. Information about energy and angular distributions of emitted electrons is also obtained. No evidence for neutrinoless double beta decay to the excited state has been found. The corresponding half-life limit is (at 90% C.L.).The search for the double beta decay to the excited state has allowed the determination of limits on the half-life for the two neutrino mode (at 90% C.L.) and for the neutrinoless mode (at 90% C.L.).
  Nuclear Physics A.
• Article: Measurement of the two neutrino double beta decay half-life of Zr-96 with the NEMO-3 detector

  J. Argyriades, R. Arnold, C. Augier, J. Baker, A.S. Barabash, A. Basharina-Freshville, M. Bongrand, G. Broudin-Bay, V. Brudanin, A.J. Caffrey, [......], G. Szklarz, J. Thomas, V. Timkin, V.I. Tretyak, V. Umatov, L. Vála, I. Vanyushin, V. Vasiliev, V. Vorobel, Ts. Vylov
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  ABSTRACT: Using 9.4 g of 96Zr isotope and 1221 days of data from the NEMO-3 detector corresponding to 0.031 kg y, the obtained 2νββ decay half-life measurement is . Different characteristics of the final state electrons have been studied, such as the energy sum, individual electron energy, and angular distribution. The 2ν nuclear matrix element is extracted using the measured 2νββ half-life and is M2ν=0.049±0.002. Constraints on 0νββ decay have also been set.
  Nuclear Physics A.