1. Status of 2D hadron attenuation paper Z. Akopov for DC_73

2. Motivation/Results In addition to Long paper, performed 2D analysis for Neon, Krypton and Xenon for all charged hadrons separately: Nu, Q2, pt2 and Lc in 3 z-ranges Nu, Q2, pt2 and Lc in 3 z-ranges Z,Q2,pt2 and Lc in 3 nu-ranges Z,Q2,pt2 and Lc in 3 nu-ranges Nu,z,Q2 and Lc in 2 pt2-ranges Nu,z,Q2 and Lc in 2 pt2-ranges 1D Lc dependence 1D Lc dependence

3. Results overview Normally attenuation goes to 1; for proton in heavier targets – different behavior – slope changes. Should be reflected/accounted for in model calculations

4. Results overview Tendency seen for pions, remains for K,p At leading z, little to no broadening

5. Results overview Nu-dependency As opposed to pions, amplification at high pt2 on heavier targets Rescattering, more protons. Models have to explain

6. Results overview When divide in z- ranges, no more scaling for proton! Slopes different

7. Results overview Anti-protons – similar to pions and co.

8. Results overview Different hN x-section for K+/K- and p/anti- p, well reflected Otherwise, for each charge scaling remains.

9. Questions imposed to paper Are we able to explain the features of 2d- dependencies just based on published 1d data? Are we able to explain the features of 2d- dependencies just based on published 1d data? What can be achieved using the 2d-data for all charged hadrons and how useful is that for theory? What can be achieved using the 2d-data for all charged hadrons and how useful is that for theory?

10. Arguments Clear difference between super-ratio for positive/negative hadrons, i.e. kaons and protons Clear difference between super-ratio for positive/negative hadrons, i.e. kaons and protons Lc dependence data for various kinematic ranges, gives solid experimental proof of different production mechanisms of proton as opposed to other hadrons Lc dependence data for various kinematic ranges, gives solid experimental proof of different production mechanisms of proton as opposed to other hadrons Important: such behavior is not possible to predict based on the published data: interpretation of these new data should motivate new approaches to theoretical threatment of hadronization Important: such behavior is not possible to predict based on the published data: interpretation of these new data should motivate new approaches to theoretical threatment of hadronization

11. Conclusion HERMES possesses new set of results that are clearly needed on the market. HERMES possesses new set of results that are clearly needed on the market. Either separate paper to present these results, or an addendum to the Long NA paper. Either separate paper to present these results, or an addendum to the Long NA paper.