we have the pleasure to invite you to the Particle Theory Seminar on Tuesday,
October 4 at 12:15, which will be given by
Kayman Jhosef Carvalho Gonçalves (Campinas University)
“Spin alignment of vector mesons as a probe of spin hydrodynamics and freeze-out“
Abstract: We argue that a detailed analysis of the spin alignment of vector mesons can serve as a probe of some aspects of spin dynamics in the vortical fluid for which there have been quite a few theoretical developments but relatively little phenomenology: The degree of relaxation between vorticity and parton spin polarization, and the degree of coherence of the hadron wavefunction at freeze-out. We show, using a coalescence model, that local spin density and vorticity impact the hadron wavefunction in different ways, and this is much more straightforward to disentangle for a vector meson than for a spin 1/2 baryon. We comment on the relevance of this issue for the current lack of consistency between experimental data on Lambda polarization and K*, phi spin alignment. Based on https://arxiv.org/abs/2104.12941
The seminar will be in a hybrid mode, local people are invited to meet in the seminar room D-2-02.