REMINDER - High Energy Physics Seminar THIS WEEK (Kelian Häring)

[HECAP - Margherita Di Giovannantonio]

*_HIGH ENERGY PHYSICS SEMINARS_*
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*Thursday, 6*th*March* 2025, at *16:00* - *Luigi Stasi Seminar Room **- 
https://indico.ictp.it/event/10942/ <https://indico.ictp.it/event/10942/>*
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Kelian Häring (Amsterdam University)


*“From Data to the Analytic S-Matrix**"*
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_Abstract_
In this talk, I will present a novel strategy to fit experimental data 
focusing on pi-pi scattering. The fit strategy requires using S-matrix 
Bootstrap and non-convex optimization methods. Using this procedure, we 
numerically constructed a full-fledged scattering amplitude that fits 
the data and contains the known QCD spectrum up to 1.4 GeV. 
Surprisingly, Bootstrap predicts an additional tetraquark state, not yet 
observed, and that is being investigated in the decay of the B+ -> pi+ 
p+ pi- at LHCb.

This talk is based on https://arxiv.org/abs/2410.23333.


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*To join via Zoom:*
https://zoom.us/j/98965732714

Meeting ID: 989 6573 2714
Passcode : 779419