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SUMMARY:A lattice study of spin interactions between heavy quarks in the q
 uark gluon plasma.
DTSTART:20260924T090000Z
DTEND:20260924T100000Z
DTSTAMP:20261024T130400Z
UID:indico-event-9448@scitalks.tifr.res.in
DESCRIPTION:Speakers: Swagatam Tah (IMSC)\n\nI will talk about the extract
 ion of the spin-dependent relativistic correction to the non-perturbative 
 potential between a heavy quark-antiquark pair in the quark gluon plasma u
 sing lattice techniques. We first analytically derive the spin-dependent p
 otential in terms of Wilson-line correlators with color-magnetic field ins
 ertions and show that it contains an imaginary part in the hard-thermal lo
 op approximation. Next\, we calculate the same in quenched QCD on a lattic
 e with a spatial extent $N_s=68$ and temporal size $N_\\tau=16\, 20$ respe
 ctively\, deep in the deconfined phase at a temperature 470 MeV. After per
 forming a continuum estimate and subsequent renormalization\, the physical
  spin-dependent potential thus obtained allows us to reconstruct the spect
 ral functions for different quarkonium states. We observe that spin-depen
 dent interactions enhance the thermal decay widths more so in the vector 
 compared to pseudo-scalar states\, manifestly more pronounced in the char
 monium rather than bottomonium states.\n\nhttps://scitalks.tifr.res.in/ev
 ent/9448/
LOCATION:A304 and on Zoom
URL:https://scitalks.tifr.res.in/event/9448/
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