Fwd: [seminari-dip] Seminar @ DF - Wed Mar 25 4.00 pm - A. Bressan - The Measurement of the Charged-Pion Polarizability

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Subject: 	[seminari-dip] Seminar @ DF - Wed Mar 25 4.00 pm - A. Bressan 
- The Measurement of the Charged-Pion Polarizability
Date: 	Wed, 18 Mar 2015 10:50:39 +0100
From: 	Erik Vesselli <vesselli at iom.cnr.it>
To: 	destinatari nscosti:;



We are pleased to announce the seminar @ DF UniTs:
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Andrea Bressan

Dipartimento di Fisica, Università degli Studi di Trieste
INFN, Sezione di Trieste

"The Measurement of the Charged-Pion Polarizability within the Broad 
Physics Program of the COMPASS Experiment"

Wednesday March 25 2015 - 4:00 pm
Lecture room A, F building
Dip. di Fisica - via Valerio, 2 – Trieste

ABSTRACT
The COMPASS experiment at CERN reports in a recent Physical Review 
Letter the first precise measurement of the electromagnetic 
polarizability of the charged pion. Pions, exchanged copiously between 
the protons and neutrons in a nucleus, are the lightest particles that 
undergo ─ in the nucleus effectively mediate ─ the strong interaction. 
Their stiffness against deformations, showed by the electromagnetic 
polarizability, is therefore a direct measure of the strong binding 
force between the constituents. This and other very interesting 
non-perturbative QCD effects will be presented and explained, knowing 
that while the Higgs boson accounts for the masses of the fundamental 
particles, the bulk of our mass comes from the binding energy of the 
strong interaction in the low energy regime.

The leaflet can be downloaded here 
<https://app.box.com/s/tsxmcchjs0reejehk8eun4brstw8zs21>

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