Antinucleon-nucleon cross section near the threshold region Antinucleon-nucleon cross section near the threshold region Third International Conference on PERSPECTIVES IN HADRONIC PHYSICS 7 - 11 May 2001 Miramare-Trieste, Italy Alessandro Feliciello I.N.F.N. - Sezione di Torino abdus salam international centre for theoretical physics
25
Embed
Antinucleon-nucleon cross section near the threshold regionpersonalpages.to.infn.it/~feliciel/pub/mySlides/Trieste...cross section near the threshold region Third International Conference
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
Antinucleon-nucleoncross section
near the threshold region
Antinucleon-nucleoncross section
near the threshold region
Third International Conference onPERSPECTIVES IN HADRONIC PHYSICS
7 - 11 May 2001Miramare-Trieste, Italy
Alessandro FelicielloI.N.F.N. - Sezione di Torino
abdus salaminternational centre for theoretical physics
2
A. Feliciello
Physics motivations
Anomalies in the NNsystem, near threshold np total cross section
A possible measurementof pp elastic cross sectionat AD the ELAPP project
Outlook
N
p
n
3
A. Feliciello
Physics motivations
historical 60’s: description of ordinary mesons
(π, ρ, …) spectrum (unsuccessful)
QCD 80’s - 90s’: search for multiquark
configurations (exotics, glueballs,hybrids, non qq meson, …)
nuclear physics understanding of nuclear forces:
• G-parity rule (pp ↔ pp and np ↔ np)• several NN bound states or resonances
(NN potential deeper than the NN one)• isospin dependence of the NN interaction
(comparison of pp with np or pn data)• dependence of annihilation strength on
some channels (fit to the scattering andannihilation data)
q
N
pN
p nN
n p
4
A. Feliciello
Experimentalsituation
0
250
500
750
1000
1250
1500
1750
0 100 200 300 4000
250
500
750
1000
1250
1500
1750
0 100 200 300 400
0
250
500
750
1000
1250
1500
1750
0 100 200 300 4000
250
500
750
1000
1250
1500
1750
0 100 200 300 400
5
A. Feliciello
np totalcross section
[Phys. Lett. B 475 (2000) 378][Phys. Lett. B 475 (2000) 378]