Corpus ID: 225103250

$T{\overline T}$ deformations and the width of fundamental particles

  title={\$T\{\overline T\}\$ deformations and the width of fundamental particles},
  author={John L. Cardy and Benjamin Doyon},
  journal={arXiv: High Energy Physics - Theory},
  • J. Cardy, B. Doyon
  • Published 29 October 2020
  • Physics
  • arXiv: High Energy Physics - Theory
We provide a simple geometric meaning for deformations of so-called $T{\overline T}$ type in relativistic and non-relativistic systems. Deformations by the cross products of energy and momentum currents in integrable quantum field theories are known to modify the thermodynamic Bethe ansatz equations by a "CDD factor". In turn, CDD factors may be interpreted as additional, fixed shifts incurred in scattering processes: a finite width added to the fundamental particles (or, if negative, to the… Expand
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