firstname = "Alexei"
lastname = "Yung"
email = "yung@thd.pnpi.spb.ru"
affiliation = "Petersburg Nuclear Physics Institute"
city = "St. Petersburg"
country = "Russia"
passportname = ""
birthday = ""
citizenship = ""
passportnumber = ""
passportissued = ""
passportexpire = ""
workplace = ""
workaddress = ""
visadates = ""
talktitle = "Seiberg’s duality and N=2 SQCD"
section = "A - Particle physics"
talkabstract = "We consider N=2 supersymmetric QCD with gauge group U(N) and $N_f$ flavors of quarks deformed by the mass term $\mu$ for the adjoint matter. At small $\mu$ in the $r$-vacua, where $r$ quarks condense the low energy theory has $U(r)\times U(1)^{N-r}$ gauge group. We consider the so called zero vacua which are present at $r < (N_f-N)$ and show that at large $\mu$ the low energy physics in these vacua can be described in terms of weakly coupled infrared-free $\mu$-dual theory with $U(N_f-N)$ gauge group. In this theory $r$ quarks condense triggering confinement of monopoles. We compare $\mu$-dual theory in zero vacua with Seiberg’s dual and find a perfect match. This match reveals the physical nature of Seiberg’s dual quarks. They turn out to be the ordinary quarks of the original theory rather then monopoles. We also review the phase structure of N=1 QCD at large $\mu$."
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