1 / 16

Elastic pp scattering, A N and r 5

Elastic pp scattering, A N and r 5. Mostly stuff shown in the previous pp2pp/STAR meetings A little bit about the cross-angle corrections (in angle vs in coordinates). Kin Yip Collider-Accelerator Department Brookhaven National Lab. Nov. 15, 2011, STAR Collaboration Meeting.

xuxa
Download Presentation

Elastic pp scattering, A N and r 5

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. Elastic pp scattering, AN and r5 • Mostly stuff shown in the previous pp2pp/STAR meetings • A little bit about the cross-angle corrections (in angle vs in coordinates) Kin Yip Collider-Accelerator Department Brookhaven National Lab. Nov. 15, 2011, STAR Collaboration Meeting

  2. Before cross-angle corrections Obviously, no fiducial cuts and hotspot cuts applied in both cases. After cross-angle corrections for the East ( -100 rad, 60 rad) All these plots are for all runs. Kin Yip

  3. Before Before After After Kin Yip

  4. After cross-angle corrections • With fiducial and hotspot cuts Kin Yip

  5. Before the crossing angle corrections were applied

  6. Before cross-angle corrections

  7. After cross-angle corrections (-100 rad, 60 rad) Kin Yip

  8. After cross-angle corrections (-100 rad, 60 rad) Kin Yip

  9. Kin Yip • I’ve used Steve’s Sep. 29 transport, Igor’s latest correction and the crossing angle corrections (including hotspot/fiducial cuts). • Systematic errors:  (0.03 rad.) and instead of t/t ~10% for all –t bins, I’ve read off the t/t values from JH’s Sept. 21’s talk : • Systematic errors include those of beam divergence & offset, geometry and Leff. • Re(r5) = 0.00124  0.00255 Im(r5) = 0.00751  0.04124 • Compared with when t/t ~10% (and no error in ) : Re(r5) = 0.00124  0.00312 Im(r5) = 0.00719  0.04834

  10. Kin Yip • After all corrections/cuts previously mentioned

  11. 2009 3  2 1 2003 Kin Yip

  12. After cross-angle corrections ( -100 rad, 60 rad) -100 rad & 60 rad are in fact from the asymmetries in coordinate space: -2.5 mm (x) and 1.5 mm (y). Divided by Leff if (Leff = 25), you get those -100 rad & 60 rad . After cross-angle corrections ( -2.5mm, 1.5 mm) All these plots are for all runs. Obviously, no fiducial cuts and hotspot cuts applied in both cases. Looks identical. Kin Yip

  13. Before After cross-angle corrections ( -2.5mm, 1.5 mm) All these plots are for all runs. Obviously, no fiducial cuts and hotspot cuts applied in both cases. Kin Yip

  14. After cross-angle corrections in coordinates ( -2.5 mm, 1.5 mm ) Differed by ~0.005 mradians or 5 radians. Kin Yip

  15. After cross-angle corrections in coordinates ( -2.5 mm, 1.5 mm ) Kin Yip

  16. After cross-angle corrections in coordinates ( -2.5 mm, 1.5 mm ) • Though most Leff is ~25, but for the vertical pot in y, Leff is more like 22.9. • 1.5mm / 22.9 ~ 65.5, rather than ~60 -radians. • I can similarly estimate the effect if we include x0/y0 corrections … • I didn’t do the fiducial/hotspot cuts in this case of using coordinates (as cross-angle corrections or whatever you call) as people are still discussing various options/methods and it takes quite a bit of time to do. Kin Yip

More Related