firstname = "Stepan"
lastname = "Sidorov"
email = "sidorovstepan88@gmail.com"
affiliation = "Bogoliubov Laboratory of Theoretical Physics"
city = "Dubna"
country = "Russian Federation"
passportname = ""
birthday = ""
citizenship = ""
passportnumber = ""
passportissued = ""
passportexpire = ""
workplace = ""
workaddress = ""
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talktitle = "Deformed ${\cal N}=4$ supersymmetric mechanics"
section = "A - Particle physics"
talkabstract = "We construct a new type of ${\cal N}{=}4$, $d{=}1$ supersymmetric systems by employing superfields defined on the cosets of the supergroup $SU(2|1)$. The relevant worldline supersymmetry is a deformation of the standard ${\cal N}{=}4, d{=}1$ supersymmetry by a mass parameter $m$. As instructive examples we consider, at the classical and quantum levels, the models associated with the supermultiplets ({\bf 1,4,3}) and ({\bf 2,4,2}) and find out interesting interrelations with some previous works on non-standard $d{=}1$  supersymmetry. In particular,  the $d{=}1$ systems with ``weak supersymmetry'' are naturally reproduced within our  $SU(2|1)$  superfield approach as a subclass of the ({\bf 1,4,3}) models. "
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