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| 2. |
- Tong, D.M., et al.
(author)
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Kinematic approach to mixed state geometric phase in nonunitary evolution
- 2004
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In: Physical Review Letters. - 0031-9007 .- 1079-7114. ; 93:8, s. 080405-
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Journal article (peer-reviewed)abstract
- A kinematic approach to the geometric phase for mixed quantal states in nonunitary evolution is proposed. This phase is manifestly gauge invariant and can be experimentally tested in interferometry. It leads to well-known results when the evolution is unitary.
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| 3. |
- Langreth, D. C., et al.
(author)
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Comment on "Nonlocal Van Der Waals Density Functional Made Simple”
- 2010
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In: Physical Review Letters. - 1079-7114 .- 0031-9007. ; 104:9
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Journal article (peer-reviewed)abstract
- A Comment on the Letter by Oleg A. Vydrov and Troy Van Voorhis, Phys. Rev. Lett.PRLTAO0031-9007 103, 063004 (2009)10.1103/PhysRevLett.103.063004. The authors of the Letter offer a Reply.
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| 4. |
- Chung, J. -H, et al.
(author)
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Carrier-mediated antiferromagnetic interlayer exchange coupling in diluted magnetic semiconductor multilayers Ga1-xMnxAs/GaAs:Be
- 2008
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In: Physical Review Letters. - 0031-9007 .- 1079-7114. ; 101:23
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Journal article (peer-reviewed)abstract
- We report the antiferromagnetic (AFM) interlayer exchange coupling between Ga0.97Mn0.03As ferromagnetic semiconductor layers separated by Be-doped GaAs spacers. Polarized neutron reflectivity reveals a characteristic splitting at the wave vector corresponding to twice the multilayer period, indicating that the coupling between the ferromagnetic layers is AFM. When the applied field is increased to above the saturation field, this AFM coupling is suppressed. This behavior is not observed when the spacers are undoped, suggesting that the observed AFM coupling is mediated by doped charge carriers. © 2008 The American Physical Society.
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| 5. |
- Rachlew (Källne), Elisabeth, 1944-
(author)
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Ultrashort-Lived Non-Rydberg Doubly Excited Resonances Observed in Molecular Photoionization
- 1996
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In: Physical Review Letters. - : American Institute of Physics (AIP). - 0031-9007 .- 1079-7114. ; 76, s. 4136-4139
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Journal article (peer-reviewed)abstract
- The N2 1sB 2 Xd dispersed fluorescence from photon excited N2 molecules has been measured in the 19–34 eV excitation range, where our theory predicts the existence of non-Rydberg doubly excited resonances which autoionize in the sub-fs regime into the N2 1 B2S1u ionic state. The experimentally deduced vibrational branching ratios sy0 1dysy0 0d revealed five prominent features, four of which could be identified as such doubly excited resonances based on the lowest order of the many-body perturbation theory. [S0031-9007(96)00230-X]
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| 6. |
- Shin, D. Y., et al.
(author)
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Stable multidomain structures formed in the process of magnetization reversal in GaMnAs ferromagnetic semiconductor thin films
- 2007
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In: Physical Review Letters. - 0031-9007 .- 1079-7114. ; 98:4
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Journal article (peer-reviewed)abstract
- The process of magnetization reversal in ferromagnetic Ga(1-x)MnxAs epilayers has been systematically investigated using the planar Hall effect (PHE). Interestingly, we have observed a pronounced asymmetry in the PHE hysteresis when the range of the field scan is restricted to fields below the final magnetization transition. The observed behavior indicates that (a)A multidomain structures are formed as M undergoes a reorientation, (b) the domain landscape formed in this way remains stable even after the magnetic field is switched off, and (c) the reorientation of magnetization directions corresponding to the transition points in PHE takes place separately within each domain. © 2007 The American Physical Society.
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| 7. |
- Aaboud, M, et al.
(author)
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Search for a Structure in the Bs0 π± Invariant Mass Spectrum with the ATLAS Experiment
- 2018
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In: Physical Review Letters. - : AMER PHYSICAL SOC. - 1079-7114 .- 0031-9007. ; 120:20
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Journal article (peer-reviewed)abstract
- A search for the narrow structure, X(5568), reported by the D0 Collaboration in the decay sequence X→Bs0π±, Bs0→J/ψφ, is presented. The analysis is based on a data sample recorded with the ATLAS detector at the LHC corresponding to 4.9 fb-1 of pp collisions at 7 TeV and 19.5 fb-1 at 8 TeV. No significant signal was found. Upper limits on the number of signal events, with properties corresponding to those reported by D0, and on the X production rate relative to Bs0 mesons, ρX, were determined at 95% confidence level. The results are N(X)
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| 8. |
- Aaboud, M, et al.
(author)
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Search for Dark Matter Produced in Association with a Higgs Boson Decaying to b b Using 36 fb-1 of pp Collisions at s =13 TeV with the ATLAS Detector
- 2017
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In: Physical Review Letters. - 1079-7114 .- 0031-9007. ; 119:18
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Journal article (peer-reviewed)abstract
- Several extensions of the standard model predict associated production of dark-matter particles with a Higgs boson. Such processes are searched for in final states with missing transverse momentum and a Higgs boson decaying to a bb pair with the ATLAS detector using 36.1 fb-1 of pp collisions at a center-of-mass energy of 13 TeV at the LHC. The observed data are in agreement with the standard model predictions and limits are placed on the associated production of dark-matter particles and a Higgs boson. © 2017 CERN, for the ATLAS Collaboration. Published by the American Physical Society.
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| 9. |
- Aad, G, et al.
(author)
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Azimuthal Angle Correlations of Muons Produced via Heavy-Flavor Decays in 5.02 TeV Pb+Pb and pp Collisions with the ATLAS Detector
- 2024
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In: Physical Review Letters. - 0031-9007. ; 132:20
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Journal article (peer-reviewed)abstract
- Angular correlations between heavy quarks provide a unique probe of the quark-gluon plasma created in ultrarelativistic heavy-ion collisions. Results are presented of a measurement of the azimuthal angle correlations between muons originating from semileptonic decays of heavy quarks produced in 5.02 TeV Formula Presented and Formula Presented collisions at the LHC. The muons are measured with transverse momenta and pseudorapidities satisfying Formula Presented and Formula Presented, respectively. The distributions of azimuthal angle separation Formula Presented for muon pairs having pseudorapidity separation Formula Presented, are measured in different Formula Presented centrality intervals and compared to the same distribution measured in Formula Presented collisions at the same center-of-mass energy. Results are presented separately for muon pairs with opposite-sign charges, same-sign charges, and all pairs. A clear peak is observed in all Formula Presented distributions at Formula Presented, consistent with the parent heavy-quark pairs being produced via hard-scattering processes. The widths of that peak, characterized using Cauchy-Lorentz fits to the Formula Presented distributions, are found to not vary significantly as a function of Formula Presented collision centrality and are similar for Formula Presented and Formula Presented collisions. This observation will provide important constraints on theoretical descriptions of heavy-quark interactions with the quark-gluon plasma. © 2024 CERN, for the ATLAS Collaboration.
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| 10. |
- Aad, G., et al.
(author)
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Combined Measurement of the Higgs Boson Mass from the H → γγ and H → ZZ* → 4ℓ Decay Channels with the ATLAS Detector Using √s=7, 8, and 13 TeV pp Collision Data
- 2023
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In: Physical Review Letters. - : American Physical Society. - 0031-9007 .- 1079-7114. ; 131:25
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Journal article (peer-reviewed)abstract
- A measurement of the mass of the Higgs boson combining the H→ZZ*→4ℓ and H→γγ decay channels is presented. The result is based on 140 fb−1 of proton-proton collision data collected by the ATLAS detector during LHC run 2 at a center-of-mass energy of 13 TeV combined with the run 1 ATLAS mass measurement, performed at center-of-mass energies of 7 and 8 TeV, yielding a Higgs boson mass of 125.11±0.09(stat)±0.06(syst)=125.11±0.11 GeV. This corresponds to a 0.09% precision achieved on this fundamental parameter of the Standard Model of particle physics.
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