1 / 8

dihadron correlation from Bowen Xiao

dihadron correlation from Bowen Xiao. ep, eAu 30x100 GeV and (5x100 GeV) Q 2 : 10,4,1 GeV 2 Trigger/Associate p T : 2/1 GeV/c and 4/2 GeV/c y=0.7 (virtual photon takes 70% of the electron energy) z 1 ,z 2 : two pions take about 30% of photon longitudinal momentum. 30x100 GeV: ep vs eAu.

talia
Download Presentation

dihadron correlation from Bowen Xiao

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. dihadron correlation from Bowen Xiao • ep, eAu 30x100 GeV and (5x100 GeV) • Q2: 10,4,1 GeV2 • Trigger/Associate pT: 2/1 GeV/c and 4/2 GeV/c • y=0.7 (virtual photon takes 70% of the electron energy) • z1,z2: two pions take about 30% of photon longitudinal momentum

  2. 30x100 GeV: ep vs eAu Q2 =1 GeV2 Q2 =4 GeV2 Q2 =10 GeV2

  3. 30x100 GeV ep eAu Q2 :10,4,1 GeV2 Q2 :10,4,1 GeV2

  4. 30x100 GeV eAu pT cut: Trigger/Associate=4/2 GeV/c pT cut: Trigger/Associate=2/1 GeV/c

  5. Summary I • Q2=1 GeV2, pT cut 2, 1 GeV:  Suppression factor between p and A (peak to peak) is 2.1. • Q2=4 GeV2, pT cut 2, 1 GeV:  Suppression factor between p and A (peak to peak) is 1.9. • Q2=10 GeV2, pT cut 2, 1 GeV; Suppression factor between p and A (peak to peak) is 1.8. • Proton correlation at different Q2:1,4, 10 GeV2, pT cut 2, 1 GeV. The proton correlation changes very slowly with different values of Q2. • Nucleus correlation at different Q2: 1,4, 10 GeV2, pT cut 2, 1 GeV. The correlation in eA collisions changes faster than ep. In general, the correlation increases with higher Q2. • This is the reason that Suppression factor between proton and A decreases with Q^2.

  6. 30x100 GeV eAu with pT cut 4/2 GeV • ep shows similar feature

  7. 5x100 GeV

  8. Summary II • Q2=1 GeV2, pT cut 4, 2 GeV;  Suppression factor between p and A (peak to peak) is 1.4. (Q2=4 or 10 GeV2 plots are almost the same.) • There is very little change to the plot if I change Q2 to 4 and 10 GeV2. I believe this is due to large pT cut. 4GeV cut seems too high as compared to saturation momentum which is about 1-2 GeV. • Nucleus correlation, different Q2: 1,4, 10 GeV2, pT cut 4, 2 GeV. The correlation in eA collisions increases very slowly with Q2 due to large pT cut. The same thing happens for the proton curves. • Curves for EIC phase-I: • at 5(e) x 100(p/A) GeV with Q2 at 1 GeV^2 • trigger: pt > 2GeV/c, associate: 1 < pt  < 2 GeV/c (suppression factor from p to A is about 1.5) • There is less suppression from proton to nucleus if we compare to the case which the energy of the electron is 30 GeV (which is 2.1) • The feature is okay, but the detail may not be right. This is because at low energy, the x of the probed gluon is not very small. In this situation, the model that we are using now may not be applicable.

More Related