| 1. |
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| 2. |
- Ambjørn, J., et al.
(författare)
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Langevin simulations of configurations with static charges
- 1985
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Ingår i: Physics Letters B. - 0370-2693. ; 159:4-6, s. 335-340
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Tidskriftsartikel (refereegranskat)abstract
- By using the Langevin equation with complex action it is possible to generate (complex) configurations in the charged sector of gauge theories. We test the algorithm in the case of two-dimensional U(1) gauge theory and are able to measure the string tension with great precision and modest use of computer time for a separation of the charged particles where a conventional Wilson loop would have a value ≈ 10-10.
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| 3. |
- Ambjørn, J., et al.
(författare)
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Observation of a string in three-dimensional SU(2) lattice gauge theory
- 1984
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Ingår i: Physics Letters B. - : Elsevier BV. - 0370-2693. ; 142:5-6, s. 410-414
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Tidskriftsartikel (refereegranskat)abstract
- SU(2) lattice gauge theory in three dimensions is investigated on a 162×32 lattice. We find that R>×T Wilson loops are well described by a simple string theory for β in the (approximate) scaling region.
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| 4. |
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| 5. |
- Axelsson, H., et al.
(författare)
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Candidates for Electron-Neutrino Mass Measurements - the Case of Kr-81
- 1988
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Ingår i: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics. - : Elsevier BV. - 0370-2693. ; 210:1-2, s. 249-252
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Tidskriftsartikel (refereegranskat)abstract
- The nuclear data of the known candidates for neutrino mass determination by resonant electron-capture beta decay are reviewed. New results are presented for the isotope 81Kr, where the transition to the 276 keV state has been found to have QEC=4.7±0.5 keV and a branching ratio of (3.0±0.2)×10−3
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| 6. |
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| 7. |
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| 8. |
- Flensburg, M., et al.
(författare)
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Measurement of Tc in the scaling region of (2+1)-dimensional SU(2) lattice gauge theory
- 1986
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Ingår i: Physics Letters B. - : Elsevier BV. - 0370-2693. ; 175:2, s. 187-191
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Tidskriftsartikel (refereegranskat)abstract
- The deconfinement temperature Tc of (2+1)-dimensional SU(2) gauge theory is measured on lattice sizes varying from 2 × 202 to 6 × 602 and with β in the rate 3-9. Approximative scaling is found for β > 6.5 and Tc/√σ = 0.94 ± 0.03 is obtained. This value is in excellent agreement with (3/π) 1 2, as predicted from the breakdown of SU(2) confinement in terms of an effective scalar string theory.
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| 9. |
- Flensburg, M., et al.
(författare)
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Strings and SU(3) lattice gauge theory
- 1985
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Ingår i: Physics Letters B. - : Elsevier BV. - 0370-2693. ; 153:6, s. 412-416
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Tidskriftsartikel (refereegranskat)abstract
- Recent SU(3) lattice Monte Carlo data (244 and 164) are analyzed in terms of a simple string model. Good agreement is found. Observed similarities between SU(3) and three-dimensional SU(2) indicate that the string theory is indeed an effective one.
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| 10. |
- Hamamoto, Ikuko, et al.
(författare)
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Form-factor of low-lying Kπ=1+ excitations in rare-earth nuclei
- 1987
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Ingår i: Physics Letters B. - : Elsevier BV. - 0370-2693. ; 194:1, s. 6-10
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Tidskriftsartikel (refereegranskat)abstract
- The differential cross section of inelastic electron scattering for the low-lying “collective” Kπ=1+ excitations in rare-earth nuclei is calculated in DWBA by using microscopically calculated transition-densities. In the region of low-momentum transfer (q⪅0.5 fm-1) in which experimental data are available the shape of calcualted cross sections is almost the same for all nuclei and is slightly but systematically different from the observed shape.
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