ORCID Profile
0000-0003-1839-8152
Current Organisation
Deutsche Elektronen-Synchrotron DESY
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Publisher: American Physical Society (APS)
Date: 25-10-2023
Publisher: American Physical Society (APS)
Date: 14-06-2019
Publisher: Springer Science and Business Media LLC
Date: 08-2018
Publisher: American Physical Society (APS)
Date: 18-01-2019
Publisher: American Physical Society (APS)
Date: 07-02-2019
Publisher: American Physical Society (APS)
Date: 31-08-2017
Publisher: American Physical Society (APS)
Date: 29-01-2019
Publisher: American Physical Society (APS)
Date: 21-02-2023
Publisher: American Physical Society (APS)
Date: 31-10-2023
Publisher: American Physical Society (APS)
Date: 28-05-2019
Publisher: American Physical Society (APS)
Date: 27-11-2017
Publisher: American Physical Society (APS)
Date: 15-11-2018
Publisher: American Physical Society (APS)
Date: 15-10-2019
Publisher: Springer Science and Business Media LLC
Date: 03-2018
Publisher: American Physical Society (APS)
Date: 14-06-2018
Publisher: American Physical Society (APS)
Date: 17-12-2018
Publisher: American Physical Society (APS)
Date: 08-02-2023
Publisher: American Physical Society (APS)
Date: 12-08-2019
Publisher: American Physical Society (APS)
Date: 17-10-2023
Publisher: American Physical Society (APS)
Date: 05-12-2017
Publisher: American Physical Society (APS)
Date: 19-10-2020
Publisher: American Physical Society (APS)
Date: 20-02-2019
Publisher: American Physical Society (APS)
Date: 04-01-2019
Publisher: American Physical Society (APS)
Date: 31-12-2019
Publisher: Springer Science and Business Media LLC
Date: 21-09-2023
Publisher: American Physical Society (APS)
Date: 10-01-2018
Publisher: American Physical Society (APS)
Date: 16-02-2023
Publisher: American Physical Society (APS)
Date: 19-03-2015
Publisher: American Physical Society (APS)
Date: 10-01-2018
Publisher: American Physical Society (APS)
Date: 29-01-2019
Publisher: American Physical Society (APS)
Date: 25-01-2018
Publisher: American Physical Society (APS)
Date: 08-08-2023
Publisher: American Physical Society (APS)
Date: 09-10-2018
Publisher: American Physical Society (APS)
Date: 12-05-2020
Publisher: American Physical Society (APS)
Date: 25-03-2020
Publisher: Springer Science and Business Media LLC
Date: 10-2019
Abstract: We report a new measurement of the e + e − → ϒ( nS ) π + π − ( n = 1 , 2 , 3) cross sections at energies from 10 . 52 to 11 . 02 GeV using data collected with the Belle detector at the KEKB asymmetric-energy e + e − collider. We observe a new structure in the energy dependence of the cross sections if described by a Breit-Wigner function its mass and width are found to be $$ M=\\left(10752.7\\pm {5.9}_{-1.1}^{+0.7}\\right)\\mathrm{MeV}/{c}^2 $$ M = 10752.7 ± 5.9 − 1.1 + 0.7 MeV / c 2 and $$ \\Gamma =\\left({35.5}_{-11.3\\kern0.5em -3.3}^{+17.6+3.9}\\right) $$ Γ = 35.5 − 11.3 − 3.3 + 17.6 + 3.9 MeV, where the first error is statistical and the second is systematic. The global significance of the new structure including systematic uncertainty is 5.2 standard deviations. We also find evidence for the e + e − → ϒ (1 S ) π + π − process at the energy 10 . 52 GeV, which is below the B $$ \\overline{B} $$ B ¯ threshold.
Publisher: American Physical Society (APS)
Date: 19-08-2019
Publisher: American Physical Society (APS)
Date: 21-02-2020
Publisher: American Physical Society (APS)
Date: 21-09-2023
Publisher: Springer Science and Business Media LLC
Date: 03-2021
Abstract: We present measurements of the branching fractions for the decays B → Kμ + μ − and B → Ke + e − , and their ratio ( R K ), using a data s le of 711 fb − 1 that contains 772 × 10 6 $$ B\\overline{B} $$ B B ¯ events. The data were collected at the ϒ(4 S ) resonance with the Belle detector at the KEKB asymmetric-energy e + e − collider. The ratio R K is measured in five bins of dilepton invariant-mass-squared ( q 2 ): q 2 ∈ (0 . 1 , 4 . 0) , (4 . 00 , 8 . 12) , (1 . 0 , 6 . 0), (10 . 2 , 12 . 8) and ( 14 . 18) GeV 2 /c 4 , along with the whole q 2 region. The R K value for q 2 ∈ (1 . 0 , 6 . 0) GeV 2 /c 4 is $$ {1.03}_{-0.24}^{+0.28} $$ 1.03 − 0.24 + 0.28 ± 0 . 01. The first and second uncertainties listed are statistical and systematic, respectively. All results for R K are consistent with Standard Model predictions. We also measure CP -averaged isospin asymmetries in the same q 2 bins. The results are consistent with a null asymmetry, with the largest difference of 2.6 standard deviations occurring for the q 2 ∈ (1 . 0 , 6 . 0) GeV 2 /c 4 bin in the mode with muon final states. The measured differential branching fractions, $$ d\\mathrm{\\mathcal{B}} $$ d ℬ /dq 2 , are consistent with theoretical predictions for charged B decays, while the corresponding values are below the expectations for neutral B decays. We have also searched for lepton-flavor-violating B → Kμ ± e ∓ decays and set 90% confidence-level upper limits on the branching fraction in the range of 10 − 8 for B + → K + μ ± e ∓ , and B 0 → K 0 μ ± e ∓ modes.
Publisher: American Physical Society (APS)
Date: 22-04-2021
Publisher: Elsevier BV
Date: 06-2017
Publisher: American Physical Society (APS)
Date: 06-2021
Publisher: Springer Science and Business Media LLC
Date: 21-06-2023
Abstract: Charged-lepton-flavor-violation is predicted in several new physics scenarios. We update the analysis of τ lepton decays into a light charged lepton ( ℓ = e ± or μ ± ) and a vector meson ( V 0 = ρ 0 , ϕ , ω , K *0 , or $$ \\overline{K} $$ K ¯ *0 ) using 980 fb − 1 of data collected with the Belle detector at the KEKB collider. No significant excess of such signal events is observed, and thus 90% credibility level upper limits are set on the τ → ℓV 0 branching fractions in the range of (1.7–4 . 3) × 10 − 8 . These limits are improved by 30% on average from the previous results.
Publisher: American Physical Society (APS)
Date: 21-03-2016
Publisher: American Physical Society (APS)
Date: 06-08-2018
Publisher: American Physical Society (APS)
Date: 08-07-2020
Publisher: American Physical Society (APS)
Date: 26-03-2020
Publisher: American Physical Society (APS)
Date: 23-03-2021
Publisher: American Physical Society (APS)
Date: 30-11-2018
Publisher: American Physical Society (APS)
Date: 03-10-2018
Publisher: American Physical Society (APS)
Date: 19-07-2019
Publisher: American Physical Society (APS)
Date: 07-07-2023
Publisher: American Physical Society (APS)
Date: 11-09-2019
Publisher: American Physical Society (APS)
Date: 10-07-2019
Publisher: WORLD SCIENTIFIC
Date: 08-2020
Publisher: American Physical Society (APS)
Date: 31-08-2017
Publisher: American Physical Society (APS)
Date: 30-12-2019
Publisher: American Physical Society (APS)
Date: 13-03-2018
Publisher: American Physical Society (APS)
Date: 20-02-2019
Publisher: Springer Science and Business Media LLC
Date: 11-2014
Publisher: Oxford University Press (OUP)
Date: 02-2018
DOI: 10.1093/PTEP/PTY003
Publisher: American Physical Society (APS)
Date: 30-07-2018
Publisher: American Physical Society (APS)
Date: 02-08-2023
Publisher: Springer Science and Business Media LLC
Date: 11-2018
Publisher: American Physical Society (APS)
Date: 15-02-2023
Publisher: American Physical Society (APS)
Date: 18-07-2018
Publisher: American Physical Society (APS)
Date: 03-12-2018
Publisher: American Physical Society (APS)
Date: 14-09-2023
Publisher: Springer Science and Business Media LLC
Date: 05-2020
Publisher: American Physical Society (APS)
Date: 28-12-2018
Publisher: American Physical Society (APS)
Date: 10-07-2019
Publisher: Elsevier BV
Date: 10-2013
No related grants have been discovered for Armine Rostomyan.