Hadron Hadron Interactions JLab 12 Ge V Presentation

Hadron - Hadron Interactions JLab @ 12 Ge. V Presentation…… y and Lattice QCD --- Martin Savage Color Transparancy --- Jean-Marc Laget November 5, 2004, JLab

Conceptual Point Quark View Hadron View Short-Distance Long-Distance – Where is the interesting physics? P >> Lc or P << Lc

Deep Inelastic Scattering 1/Q << r << 1/ Lc N N, p p r ~ 1/ Lc r >> 1/ Lc

Pionic-DVCS g* g p p p

Y-N Interactions Q Q r. QQ Q y y Q p ~ 1/ r. QQ Rough Estimate QCD p << 1/ Lattice r. QQ Symmetries, Expt, or Lattice QCD Nucleon < N | c 1 Gmn + C 2 Gml Gln vm vn | N >

Y (2 s) Expect : d 1, 2 ~ r. QQ 3 consistent ! Want : c 1, 2 and d 1, 2 Y (1 s) pp Fit to Data

g* N y. N +. . . g g* g* N N ? y N High Energy y Rigour? ? ? y N Psionic-DVCS ? ? Useful? ? ? Rigour? ? ?

g* d LNK g* +. . . g* N g N N K N High Energy L Rigour? ? ? L N K L N Lambda-onic-DVCS ? ? ? Useful? ? ? Rigour? ?

Nuclear Physics and lattice QCD LHPC JLab MIT University of Maryland University of Washington Lawrence Berkeley Laboratory University of New Hampshire University of Barcelona

Topics that are or can or should be tackled today with Lattice QCD Nucleon and p Properties … n MN , m. N , g. A , qm. . n , as functions of mq , a , V The NN Systems … A n d(s) , L 1, . . Hyperon Properties and Systems… n ML , L Np , L N. . V(R) between Mesons and Baryons with one Q : DD Yp Yp , YN YN , YY YY

Maiani-Testa: End of the Innocence, pp Scattering GNN (s)Eucl GNN (s)Mink Away from Kinematic Thresholds at infinite Volume d (s) ? pp = pp CP-PACS

NN-Scattering Quenched Data (Fukugita et al, 1995) , Latt = 204 A Lattice Measurement of at this mp would fix counterterms : D 2 M –dependence nuclear properties – Little is q known……. . this is all !!!