Annihilation operators associated with unstable vacua in non-equilibrium thermo-field dynamics by K. Yoshida, T. Arimitsu

“…Given is an alternative route to derive the time-dependent annihilation operators within the formalism. …”
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Involvement of hydrogen-vacancy complexes in the baking effect of niobium cavities by B. Visentin, M. F. Barthe, V. Moineau, P. Desgardin

“…For the first time, positron annihilation spectroscopy performed on niobium samples reveals the increase after baking of positrons trapped under the Nb surface. …”
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Annihilation of point defect pairs in freely suspended liquid-crystal films by Amine Missaoui, Kirsten Harth, Peter Salamon, Ralf Stannarius

“…The square-root dependence of the defect separation on the time until annihilation and the asymmetry in propagation velocities of the opponents predicted by theory are confirmed. …”
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Very heavy dark Skyrmions by Rainer Dick

“…At the same time, enhanced annihilation cross sections are necessary for indirect detection of very heavy dark matter components beyond 100 TeV. …”
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Non-steady diffusion and adsorption of organic micropollutants in ion-exchange membranes: effect of the membrane thickness by Malgorzata Roman, Pawel Roman, Rhea Verbeke, Leonardo Gutierrez, Marjolein Vanoppen, Marcel Dickmann, Werner Egger, Ivo Vankelecom, Jan Post, Emile Cornelissen, Karel Keesman, Arne Verliefde

“…For the first time, positron annihilation lifetime spectroscopy was used to study differences in the free volume element radius between anion- and cation-exchange membranes, and between their thicknesses. …”
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Plastic Softening Induced by High-Frequency Vibrations Accompanying Uniaxial Tension in Aluminum by Ziyu Zhao, Jinxing Liu, Amir Siddiq

“…The evolution of the atomic structure reveals that dislocations have enough time to annihilate under a lower tensile strain rate, resulting in strong ups and downs in the strain–stress curves. …”
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A clockwork WIMP by Thomas Hambye, Daniele Teresi, Michel H.G. Tytgat

“…At the same time, pair annihilations are unsuppressed, so that the relic density is set by the usual freeze-out of the DM particle from the thermal bath. …”
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„Kłopoty z opisem rzeczy”, czyli (nie)możliwość 
mimesis w epoce relatywizacji podmiotu by Arent van Nieukerken

“…‘Time past’ and ‘time present’ are one in a process that both redeems and transcends time, without annihilating the moments of which it consists. …”
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