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SUMMARY:Igor Klebanov (Princeton U.)
DTSTART:20210325T151500Z
DTEND:20210325T170000Z
DTSTAMP:20260423T040216Z
UID:LIJC/36
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/LIJC/36/">Co
 nfining or Not?</a>\nby Igor Klebanov (Princeton U.) as part of London Int
 egrability Journal Club\n\n\nAbstract\nThe problem of Color Confinement in
  Yang-Mills theory is one of the deepest problems in theoretical physics. 
 There is convincing numerical evidence from Lattice Gauge Theory\, yet the
  proof of Confinement in Asymptotically Free theories has not been found. 
 I will briefly introduce the Confinement problem and review some results o
 n large N theories using the gauge/gravity duality. I will then discuss tw
 o-dimensional SU(N) theory coupled to an adjoint Majorana fermion. I will 
 show that\, when the adjoint mass is sent to zero\, the spectrum retains a
  mass gap but the confinement disappears. Using the Discretized Light-Cone
  Quantization\, I will discuss the spectrum of color singlet states and ex
 hibit certain threshold states. Similar threshold states are also present 
 in a model with a massless adjoint and a massive fundamental fermion. They
  provide new evidence for the lack of confinement. When the adjoint mass i
 s turned on\, the theory becomes confining\, and the spectrum of bound sta
 tes becomes discrete.\n
LOCATION:https://researchseminars.org/talk/LIJC/36/
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