AN IDEA TO BROADEN THE EIC SCIENCE

PROGRAM

E.C. Aschenauer&

M. Stratmann

arXiv: 1212.1701 & 1108.1713

EIC User Meeting 20142 E.C. Aschenauer

CAN WE UNDERSTAND HADRONIZATION AT AN EIC? Physics deliverable in the EIC-WP:

Quark hadronization: By measuring pion and D0 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

Hard Scattering Process

X

q(x1)

g(x2)

EIC User Meeting 20143 E.C. Aschenauer

CAN WE UNDERSTAND HADRONIZATION AT AN EIC?

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, Q2, pt, z detector design foresee wide h coverage (-5 to 5) with

PIDcan study correlations between current and target FF

regioncan we see a pt (kt), z ordering as predicted by string

models how to access kt 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

EIC User Meeting 20144 E.C. Aschenauer

CAN WE UNDERSTAND HADRONIZATION AT AN EIC?

ep and eA particle correlations for rare high multiplicity events can we see effects as v2

n like in pp and p(d)A

Dpmjet eADpmjet epPythia ep

-5<eta<5, all final states will put strong constrains on

theoretical models IS vs. FS effects

EIC User Meeting 20145 E.C. Aschenauer

CAN WE UNDERSTAND HADRONIZATION AT AN EIC?

the most challenging goal: search for exotics go from ep/eA to gp/gA collider

o follow HALL-D idea: spin-1 beam and polarisation can make a difference

o follow ILC g-g collider idea produce g-beam through Compton back scattering

EIC will give access to the charm sector and high mass stateso test universality of states, see Belle & LHCb for Z(4430)

adding more general questions on hadronization tothe EIC physics portfolio will broaden the possibilities

to gain new insights in QCD

Varenna, July 20116

PROBING NUCLEON STRUCTURE THROUGH QCD

E.C. Aschenauer

EM interaction Photon

o Sensitive to electric charge2

o Insensitive to color charge Strong interaction

Gluono Sensitive to color chargeo Insensitive to flavor

Weak interaction Weak Boson

o Sensitive to weak charge ~ flavoro Insensitive to color

Only having high precision datafrom all 3 probes

will give the opportunityto understand the full dimension of QCD

and separate interaction dependent effects from true universal features of nuclear matter