Papers by Olaf Lechtenfeld
Physics Letters B, Apr 1, 2019
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Journal of physics, Jan 28, 2013
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Physics Letters B, Aug 1, 2020
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Physics Letters B, Mar 1, 2019
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Journal of High Energy Physics, Mar 6, 2003
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Nuclear Physics B, Aug 1, 2001
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Nuclear Physics B, Apr 1, 2001
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Journal of High Energy Physics, May 1, 2018
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Journal of High Energy Physics, Oct 1, 2011
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Physics Letters B, Aug 1, 1999
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Physics Letters B, Aug 1, 2000
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Physical review, Aug 20, 2009
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Physics Letters B, Sep 1, 2018
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Nuclear Physics B, 2005
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Nuclear Physics B, Nov 1, 2004
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Physics Letters B
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We construct new models of N=8 superconformal mechanics associated with the off-shell N=8, d=1 su... more We construct new models of N=8 superconformal mechanics associated with the off-shell N=8, d=1 supermultiplets (3,8,5) and (5,8,3). These two multiplets are derived as N=8 Goldstone superfields and correspond to nonlinear realizations of the N=8, d=1 superconformal group OSp(4^*|4) in its supercosets OSp(4^*|4)/U(1)_R x SO(5) and OSp(4^*|4)/SU(2)_R x SO(4), respectively. The irreducibility constraints for these superfields automatically follow from appropriate superconformal covariant conditions on the Cartan superforms. The N=8 superconformal transformations of the superspace coordinates and the Goldstone superfields are explicitly given. Interestingly, each N=8 supermultiplet admits two different off-shell N=4 decompositions, with different N=4 superconformal subgroups SU(1,1|2) and OSp(4^*|2) of OSp(4^*|4) being manifest as superconformal symmetries of the corresponding N=4, d=1 superspaces. We present the actions for all such N=4 splittings of the N=8 multiplets considered.
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Proceedings of RDP online workshop "Recent Advances in Mathematical Physics" — PoS(Regio2020), 2021
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We construct new models of N=8 superconformal mechanics associated with the off-shell N=8, d=1 su... more We construct new models of N=8 superconformal mechanics associated with the off-shell N=8, d=1 supermultiplets (3,8,5) and (5,8,3). These two multiplets are derived as N=8 Goldstone superfields and correspond to nonlinear realizations of the N=8, d=1 superconformal group OSp(4⋆|4) in its supercosets OSp(4 |4) U(1)R⊗SO(5) and OSp(4|4) SU(2)R⊗SO(4) , respectively. The irreducibility constraints for these superfields automatically follow from appropriate superconformal covariant conditions on the Cartan superforms. The N=8 superconformal transformations of the superspace coordinates and the Goldstone superfields are explicitly given. Interestingly, each N=8 supermultiplet admits two different off-shell N=4 decompositions, with different N=4 superconformal subgroups SU(1, 1|2) and OSp(4⋆|2) of OSp(4⋆|4) being manifest as superconformal symmetries of the corresponding N=4, d=1 superspaces. We present the actions for all such N=4 splittings of the N=8 multiplets considered.
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Papers by Olaf Lechtenfeld