Starts 13 Apr 2021 11:00
Ends 13 Apr 2021 12:00
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CMSP Seminar (Joint ICTP/SISSA Statistical Physics): Unstable Particles and their Signatures from Generalized Hydrodynamics
Virtual
ABSTRACT
In this talk I will review the main results and ideas of two recent papers [arXiv:2005.11266,arXiv:2103.03735]. In these papers we studied an integrable quantum field theory (IQFT) using the generalized hydrodynamics approach for different initial state configurations (equilibrium, partitioning protocol, gaussian temperature profile). The model we considered has two special features: it allows for the formation of an unstable particle from the scattering of two stables ones, and its scattering matrix breaks parity invariance. By studying typical hydrodynamic quantities such as the effective velocities of stable particles and their densities, we have found that they exhibit unique features that may be interpreted as universal signatures of the formation and decay of unstable particles. These signatures allow us to "visualize" the dynamics of unstable particles in IQFT hence, to give an interesting physical/phenomenological interpretation that is absent when they are merely associated with poles of the scattering matrix.
In this talk I will review the main results and ideas of two recent papers [arXiv:2005.11266,arXiv:2103.03735]. In these papers we studied an integrable quantum field theory (IQFT) using the generalized hydrodynamics approach for different initial state configurations (equilibrium, partitioning protocol, gaussian temperature profile). The model we considered has two special features: it allows for the formation of an unstable particle from the scattering of two stables ones, and its scattering matrix breaks parity invariance. By studying typical hydrodynamic quantities such as the effective velocities of stable particles and their densities, we have found that they exhibit unique features that may be interpreted as universal signatures of the formation and decay of unstable particles. These signatures allow us to "visualize" the dynamics of unstable particles in IQFT hence, to give an interesting physical/phenomenological interpretation that is absent when they are merely associated with poles of the scattering matrix.