1 / 5

Do we really need EIC/ELIC ? EIC meeting, MIT, April 2007

Do we really need EIC/ELIC ? EIC meeting, MIT, April 2007. E.C. Aschenauer. Really nasty questions. Why is HERA turned off if this physics is so interesting new injector was only 100MEuro only 151 people from 32 Inst. signed is that big enough of an community

gary
Download Presentation

Do we really need EIC/ELIC ? EIC meeting, MIT, April 2007

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Do we really need EIC/ELIC ? EIC meeting, MIT, April 2007 E.C. Aschenauer

  2. Really nasty questions • Why is HERA turned off if this physics is so interesting • new injector was only 100MEuro • only 151 people from 32 Inst. signed is that big enough of an community • Is a precision machine worth a 1000M$ • Is there any discovery potential • What is left after HERA, COMPASS and QCD@LHC • Why not lining up with LHeC are measuring polarized quantities really so important • If there is money only for one project in the next 10 years, would you be willing to give up on of the other, RHIC-2, polarized 500GeV pp, 12GeV E.C. Aschenauer

  3. Nasty Questions • Why will EIC keep it’s promise to measure DG(x) if Rhic and Compass have not yet been successful • Why should extrapolating from EIC to LHC be better than extrapolating from HERA to LHC • If the program can start only after 12GeV construction is finished still interesting • What is the real interest from non-American groups • Is there enough machine expert person-power to do R&D for EIC/ELIC and 12GeV upgrade as well as RHIC-2 • The HERA-II Lumi-upgrade was quite a struggle, why will 2ns bunch spacing not cause the same problems E.C. Aschenauer

  4. Questions • Physics: • Fragmentation: why is analyzing the Babar and Belle data not good enough • why should anybody be excited about a stamp collection measurement of structure functions, like transversity and friends • will we ever be able to correlate sivers really with Lq or Lg • DG(x) you measure is not what you needto get Lg • Why is measuring Jq and Jg not enough. Is it really needed to separate all the individual contributions to the helicity sum rule • Is there really a concept to get GPDs from all the exclusive measurements E.C. Aschenauer

  5. Questions • Detector / Accelerator: • You will be systematic limited; what is the strategy to improve the nucleon polarization measurement • what is the indication that you will be able to build a detector to measure the very low angle scattered electron • is a detector for (semi-)inclusive and exclusive physics compatible • how big is fraction of pile-up events • Which Luminosity is really needed and achievable for $’s what is the driving physics • Why are polarized electrons and positrons needed • Why you need He-3 if you have polarized p and d E.C. Aschenauer

More Related