E.C. Aschenauer & M. Stratmann arXiv: &

E.C. Aschenauer EIC User Meeting 2014  Physics deliverable in the EIC-WP: Quark hadronization: By measuring pion and D 0 meson production in both electron+proton and electron+nucleus collisions, the EIC would provide the first measurement of the quark mass dependence of the hadronization along with the response of nuclear matter to a fast moving quark. But what do we really know about hadronization ? individual vs. collective phenomena 2 Hard Scattering Process X q(x 1 ) g(x 2 )

E.C. Aschenauer EIC User Meeting 2014  EIC unique machine to study hadronization  DIS is sensitive to favored and unfavored FFs o can still improve significantly collinear FFs  access to wide kinematic range, x, Q 2, p t, z  detector design foresee wide  coverage (-5 to 5) with PID  can study correlations between current and target FF region  can we see a p t (k t ), z ordering as predicted by string models  how to access k t  talk by M. Baker  Many interesting spin dependent phenomena in FF  IFF, Collins FF, which manifest themselves in hadron correlations and azimuthal distributions  how do they translate from the current to the target fragmentation region 3

E.C. Aschenauer EIC User Meeting 2014  ep and eA particle correlations for rare high multiplicity events  can we see effects as v 2 n like in pp and p(d)A 4 Dpmjet eA Dpmjet ep Pythia ep -5<eta<5, all final states will put strong constrains on theoretical models  IS vs. FS effects

E.C. Aschenauer EIC User Meeting 2014  the most challenging goal: search for exotics  go from ep/eA to  p/  A collider o follow HALL-D idea: spin-1 beam and polarisation can make a difference o follow ILC  collider idea  produce  -beam through Compton back scattering  EIC will give access to the charm sector and high mass states o test universality of states, see Belle & LHCb for Z(4430) 5 adding more general questions on hadronization to the EIC physics portfolio will broaden the possibilities to gain new insights in QCD

E.C. Aschenauer Varenna, July  EM interaction  Photon o Sensitive to electric charge 2 o Insensitive to color charge  Strong interaction  Gluon o Sensitive to color charge o Insensitive to flavor  Weak interaction  Weak Boson o Sensitive to weak charge ~ flavor o Insensitive to color Only having high precision data from all 3 probes will give the opportunity to understand the full dimension of QCD and separate interaction dependent effects from true universal features of nuclear matter