Elliptic flow from two- and four-particle correlations in Au + Au collisions at sqrt(sNN) = 130 GeV
C. Adler et al., Phys. Rev. C 66, 034904 (2002)
Fig.2 : Correlation between the event
plane angles
Errors are statistical
| nch/nmax |
correlation between the event plane angles determined from pairs of subevents partitioned randomly (circles) |
correlation between the event plane angles determined from pairs of subevents partitioned by pseudorapidity (squares) |
correlation between the event plane angles determined from pairs of subevents partitioned by charge (crosses) |
| 0.06 |
0.1122 +- 0.0028 |
0.0936 +- 0.0033 |
0.1183 +- 0.0033 |
| 0.17 |
0.2851 +- 0.0037 |
0.2544 +- 0.0045 |
0.2940 +- 0.0044 |
| 0.25 |
0.3835 +- 0.0040 |
0.3555 +- 0.0048 |
0.3924 +- 0.0047 |
| 0.36 |
0.4212 +- 0.0044 |
0.4024 +- 0.0053 |
0.4315 +- 0.0052 |
| 0.47 |
0.4027 +- 0.0046 |
0.4007 +- 0.0055 |
0.4350 +- 0.0054 |
| 0.58 |
0.3524 +- 0.0052 |
0.3560 +- 0.0061 |
0.3919 +- 0.0060 |
| 0.70 |
0.2603 +- 0.0060 |
0.2941 +- 0.0069 |
0.3132 +- 0.0069 |
| 0.84 |
0.1564 +- 0.0058 |
0.1787 +- 0.0064 |
0.1985 +- 0.0064 |
Fig. 3. The event plane resolution for full events as a function of centrality
Errors are statistical
| nch/nmax |
The event plane resolution for full events, using randomly partitioned subevents with with pt weight (circles) |
The event plane resolution for full events, using randomly partitioned subevents without pt weight (triangles) |
| 0.06 |
0.457 +- 0.005 |
0.405 +- 0.007 |
| 0.17 |
0.687 +- 0.004 |
0.600 +- 0.006 |
| 0.25 |
0.769 +- 0.003 |
0.690 +- 0.005 |
| 0.36 |
0.795 +- 0.003 |
0.726 +- 0.005 |
| 0.47 |
0.783 +- 0.002 |
0.727 +- 0.005 |
| 0.58 |
0.746 +- 0.004 |
0.680 +- 0.006 |
| 0.70 |
0.662 +- 0.006 |
0.604 +- 0.009 |
| 0.84 |
0.531 +- 0.009 |
0.465 +- 0.012 |
Fig. 4. Elliptic flow from event plane method as a function of centrality
Errors are statistical
| nch/nmax |
Elliptic flow signal v2 from study of the correlation between particle pairs consisting of randomly chosen particles (circles) |
Elliptic flow signal v2 from study of the correlation between particle pairs consisting of opposite sign of charge (crosses) |
Elliptic flow signal v2 from study of the correlation between particle pairs consisting of the same sign of charge (triangles) |
Elliptic flow signal v2 from study of the correlation between particle pairs consisting of opposite sign of pseudorapidity (squares) |
| 0.06 |
0.0690 +- 0.0011 |
0.0712 +- 0.0014 |
0.0671 +- 0.0013 |
0.0746 +- 0.0016 |
| 0.17 |
0.0677 +- 0.0006 |
0.0720 +- 0.0007 |
0.0665 +- 0.0007 |
0.0705 +- 0.0008 |
| 0.25 |
0.0648 +- 0.0004 |
0.0692 +- 0.0006 |
0.0643 +- 0.0005 |
0.0663 +- 0.0006 |
| 0.36 |
0.0590 +- 0.0004 |
0.0625 +- 0.0005 |
0.0593 +- 0.0005 |
0.0599 +- 0.0005 |
| 0.47 |
0.0503 +- 0.0004 |
0.0541 +- 0.0005 |
0.0493 +- 0.0005 |
0.0513 +- 0.0004 |
| 0.58 |
0.0406 +- 0.0004 |
0.0448 +- 0.0005 |
0.0406 +- 0.0005 |
0.0420 +- 0.0005 |
| 0.70 |
0.0304 +- 0.0005 |
0.0342 +- 0.0005 |
0.0280 +- 0.0005 |
0.0307 +- 0.0005 |
| 0.84 |
0.0197 +- 0.0005 |
0.0232 +- 0.0006 |
0.0162 +- 0.0005 |
0.0202 +- 0.0005 |
Fig. 5. Compare pt weight v2 with unit weight v2
Errors are statistical
| nch/nmax |
v2 versus from the conventional method with pt weight (circles) |
v2 versus from the conventional method with unit weight. |
ratio of statistical error on v2 with pt weighting divided by the same with unit weighting. |
| 0.06 |
0.0690 +- 0.00112 |
0.0687 +- 0.00161 |
0.69 |
| 0.17 |
0.0677 +- 0.00057 |
0.0705 +- 0.00091 |
0.63 |
| 0.25 |
0.0648 +- 0.00043 |
0.0653 +- 0.00065 |
0.66 |
| 0.36 |
0.0590 +- 0.00039 |
0.0604 +- 0.00057 |
0.68 |
| 0.47 |
0.0503 +- 0.00036 |
0.0511 +- 0.00052 |
0.70 |
| 0.58 |
0.0406 +- 0.00038 |
0.0417 +- 0.00056 |
0.67 |
| 0.70 |
0.0304 +- 0.00046 |
0.0323 +- 0.00066 |
0.70 |
| 0.84 |
0.0197 +- 0.00050 |
0.0215 +- 0.00074 |
0.68 |
Fig. 6. Compare event plane method and scalar product method
Errors are statistical
| nch/nmax |
v2 versus from the event plane method (circles) |
v2 versus from the scalar product method (triangles) |
ratio of statistical error on v2 for the scalar product method divided by the same for the event plane method. |
| 0.06 |
0.06822 +- 0.00167 |
0.07287 +- 0.00112 |
0.67 |
| 0.17 |
0.06849 +- 0.00086 |
0.07127 +- 0.00065 |
0.76 |
| 0.25 |
0.06428 +- 0.00061 |
0.06794 +- 0.00050 |
0.81 |
| 0.36 |
0.05886 +- 0.00055 |
0.06153 +- 0.00045 |
0.82 |
| 0.47 |
0.05111 +- 0.00049 |
0.05348 +- 0.00041 |
0.83 |
| 0.58 |
0.04148 +- 0.00051 |
0.04354 +- 0.00041 |
0.80 |
| 0.70 |
0.03177 +- 0.00057 |
0.03312 +- 0.00044 |
0.77 |
| 0.84 |
0.02000 +- 0.00061 |
0.02104 +- 0.00043 |
0.71 |
Fig.8: Elliptic flow as determined from the fits to the q distributions in different centrality bins.
Errors are statistical. pt range for q is 0.1 - 2 GeV/c, eta range for q is -1.3 - 1.3.
The circles are from the standard method with random subevents. For the squares, all the centralities were fit separately. For the triangles, centrality bins 2 to 8 were fit with the same value of the non-flow parameter.
| nch/nmax |
v2 from standard method |
v2 from seperately fitting of q distribution |
v2 from fitting of q distribution with the same nonflow par. |
| 0.06 |
0.0690 +- 0.0011 |
|
|
| 0.17 |
0.0677 +- 0.0006 |
0.0536 +- 0.0025 |
0.0533 +- 0.0006 |
| 0.25 |
0.0648 +- 0.0004 |
0.0534 +- 0.0014 |
0.0558 +- 0.0005 |
| 0.36 |
0.0590 +- 0.0004 |
0.0516 +- 0.0009 |
0.0524 +- 0.0005 |
| 0.47 |
0.0503 +- 0.0004 |
0.0437 +- 0.0010 |
0.0456 +- 0.0005 |
| 0.58 |
0.0406 +- 0.0004 |
0.0357 +- 0.0010 |
0.0351 +- 0.0006 |
| 0.70 |
0.0304 +- 0.0005 |
0.0253 +- 0.0019 |
0.0250 +- 0.0008 |
| 0.84 |
0.0197 +- 0.0005 |
0.0147 +- 0.0045 |
0.0109 +- 0.0015 |
Fig.13: Measured elliptic flow versus centrality for Au + Au collisions at sqrt(sNN) = 130 GeV.
The circles
show the conventional v2 with estimated systematic uncertainty due to
non-flow, the stars show the 4th-order cumulant v2 from the generating
function, the crosses show the conventional v2 from quarter-events, and
the squares show the 4th-order cumulant v2 from
the four-subevent method. Errors are statistical except that of v2 from the conventional method.
| nch/nmax |
conventional v2 |
conventional v2 from quater events |
4-th order cumulant v2 from the genetating function | 4-th order cumulant v2 from the four-subevent method |
| 0.06 |
0.0690 + 0.0011 - 0.0370 |
0.0615 +- 0.0032 |
0.0516 +- 0.0115 |
|
| 0.17 |
0.0677 + 0.0006 - 0.0101 |
0.0598 +- 0.0026 |
0.0550 +- 0.0028 |
0.0515 + 0.0034 - 0.0043 |
| 0.25 |
0.0648 + 0.0004 - 0.0076 |
0.0638 +- 0.0029 |
0.0530 +- 0.0014 |
0.0547 + 0.0010 - 0.0011 |
| 0.36 |
0.0590 + 0.0004 - 0.0051 |
0.0539 +- 0.0025 |
0.0512 +- 0.0012 |
0.0517 + 0.0008 - 0.0009 |
| 0.47 |
0.0503 + 0.0004 - 0.0044 |
0.0459 +- 0.0025 |
0.0431 +- 0.0010 |
0.0437 + 0.0007 - 0.0008 |
| 0.58 |
0.0406 + 0.0004 - 0.0044 |
0.0318 +- 0.0026 |
0.0347 +- 0.0015 |
0.0327 + 0.0011 - 0.0012 |
| 0.70 |
0.0304 + 0.0005 - 0.0047 |
0.0167 +- 0.0020 |
0.0231 +- 0.0021 |
0.0227 + 0.0016 - 0.0020 |
| 0.84 |
0.0197 + 0.0005 - 0.0050 |
0.0081 +- 0.0039 |
0.0057 +- 0.0146 |
0.0097 + 0.0050 - 0.0097 |
Fig. 14 Reconstructed v2 versus pseudorapidity from the conventional method (circles), from the second-order cumulant method (triangles), and from the fourth-order cumulant method(stars), in eight centrality bins.
pt range for the plot is 0.1 - 8 GeV/c. Errors are statistical.
| centrality |
pseudorapidity |
v2 from stand event plane method |
v2 from 2nd order cumulant method |
v2 from 4th order cumulant method |
| 53%-77% |
-1.15 |
0.0628 +- 0.0029 |
0.0595 +- 0.0033 |
0.0319 +- 0.0448 |
| -0.90 |
0.0681 +- 0.0027 |
0.0653 +- 0.0030 |
0.0570 +- 0.0375 |
| -0.70 |
0.0661 +- 0.0026 |
0.0661 +- 0.0029 |
0.0424 +- 0.0385 |
| -0.50 |
0.0696 +- 0.0027 |
0.0673 +- 0.0029 |
0.0204 +- 0.0386 |
| -0.30 |
0.0758 +- 0.0027 |
0.0725 +- 0.0030 |
0.0045 +- 0.0396 |
| -0.10 |
0.0825 +- 0.0027 |
0.0788 +- 0.0030 |
0.0920 +- 0.0415 |
| 0.10 |
0.0755 +- 0.0027 |
0.0773 +- 0.0030 |
0.0902 +- 0.0402 |
| 0.30 |
0.0761 +- 0.0027 |
0.0739 +- 0.0030 |
0.0860 +- 0.0383 |
| 0.50 |
0.0731 +- 0.0026 |
0.0735 +- 0.0029 |
0.0635 +- 0.0384 |
| 0.70 |
0.0630 +- 0.0026 |
0.0589 +- 0.0029 |
0.0462 +- 0.0375 |
| 0.90 |
0.0579 +- 0.0028 |
0.0587 +- 0.0030 |
0.0192 +- 0.0380 |
| 1.15 |
0.0536 +- 0.0030 |
0.0541 +- 0.0034 |
0.0830 +- 0.0472 |
| 41%-53% |
-1.15 |
0.0607 +- 0.0017 |
0.0620 +- 0.0020 |
0.0623 +- 0.0106 |
| -0.90 |
0.0652 +- 0.0016 |
0.0684 +- 0.0019 |
0.0630 +- 0.0096 |
| -0.70 |
0.0683 +- 0.0015 |
0.0705 +- 0.0018 |
0.0514 +- 0.0092 |
| -0.50 |
0.0686 +- 0.0015 |
0.0701 +- 0.0018 |
0.0524 +- 0.0093 |
| -0.30 |
0.0698 +- 0.0015 |
0.0743 +- 0.0018 |
0.0654 +- 0.0095 |
| -0.10 |
0.0698 +- 0.0016 |
0.0720 +- 0.0018 |
0.0576 +- 0.0096 |
| 0.10 |
0.0733 +- 0.0016 |
0.0742 +- 0.0018 |
0.0616 +- 0.0096 |
| 0.30 |
0.0731 +- 0.0015 |
0.0768 +- 0.0018 |
0.0585 +- 0.0095 |
| 0.50 |
0.0715 +- 0.0015 |
0.0741 +- 0.0018 |
0.0529 +- 0.0094 |
| 0.70 |
0.0663 +- 0.0015 |
0.0671 +- 0.0018 |
0.0545 +- 0.0092 |
| 0.90 |
0.0621 +- 0.0016 |
0.0643 +- 0.0019 |
0.0403 +- 0.0097 |
| 1.15 |
0.0608 +- 0.0018 |
0.0630 +- 0.0021 |
0.0509 +- 0.0111 |
| 31%-41% |
-1.15 |
0.0586 +- 0.0013 |
0.0607 +- 0.0016 |
0.0430 +- 0.0056 |
| -0.90 |
0.0612 +- 0.0012 |
0.0644 +- 0.0015 |
0.0463 +- 0.0049 |
| -0.70 |
0.0637 +- 0.0012 |
0.0670 +- 0.0014 |
0.0573 +- 0.0046 |
| -0.50 |
0.0660 +- 0.0012 |
0.0694 +- 0.0014 |
0.0505 +- 0.0047 |
| -0.30 |
0.0696 +- 0.0012 |
0.0736 +- 0.0014 |
0.0574 +- 0.0048 |
| -0.10 |
0.0687 +- 0.0012 |
0.0737 +- 0.0014 |
0.0582 +- 0.0048 |
| 0.10 |
0.0685 +- 0.0012 |
0.0720 +- 0.0014 |
0.0563 +- 0.0048 |
| 0.30 |
0.0668 +- 0.0012 |
0.0696 +- 0.0014 |
0.0575 +- 0.0048 |
| 0.50 |
0.0662 +- 0.0012 |
0.0674 +- 0.0014 |
0.0634 +- 0.0047 |
| 0.70 |
0.0638 +- 0.0012 |
0.0661 +- 0.0014 |
0.0552 +- 0.0046 |
| 0.90 |
0.0615 +- 0.0012 |
0.0639 +- 0.0015 |
0.0458 +- 0.0049 |
| 1.15 |
0.0600 +- 0.0014 |
0.0622 +- 0.0017 |
0.0538 +- 0.0054 |
| 24%-31% |
-1.15 |
0.0542 +- 0.0013 |
0.0568 +- 0.0015 |
0.0483 +- 0.0046 |
| -0.90 |
0.0568 +- 0.0012 |
0.0591 +- 0.0014 |
0.0522 +- 0.0041 |
| -0.70 |
0.0604 +- 0.0011 |
0.0631 +- 0.0013 |
0.0492 +- 0.0038 |
| -0.50 |
0.0623 +- 0.0011 |
0.0654 +- 0.0013 |
0.0558 +- 0.0039 |
| -0.30 |
0.0598 +- 0.0011 |
0.0630 +- 0.0013 |
0.0540 +- 0.0039 |
| -0.10 |
0.0616 +- 0.0011 |
0.0632 +- 0.0013 |
0.0533 +- 0.0040 |
| 0.10 |
0.0621 +- 0.0011 |
0.0633 +- 0.0013 |
0.0469 +- 0.0039 |
| 0.30 |
0.0612 +- 0.0011 |
0.0638 +- 0.0013 |
0.0554 +- 0.0039 |
| 0.50 |
0.0626 +- 0.0011 |
0.0665 +- 0.0013 |
0.0614 +- 0.0038 |
| 0.70 |
0.0563 +- 0.0011 |
0.0584 +- 0.0013 |
0.0511 +- 0.0038 |
| 0.90 |
0.0551 +- 0.0012 |
0.0574 +- 0.0014 |
0.0532 +- 0.0041 |
| 1.15 |
0.0524 +- 0.0013 |
0.0575 +- 0.0015 |
0.0444 +- 0.0045 |
| 16%-24% |
-1.15 |
0.0463 +- 0.0012 |
0.0482 +- 0.0014 |
0.0371 +- 0.0040 |
| -0.90 |
0.0488 +- 0.0011 |
0.0524 +- 0.0013 |
0.0415 +- 0.0036 |
| -0.70 |
0.0509 +- 0.0010 |
0.0545 +- 0.0012 |
0.0479 +- 0.0033 |
| -0.50 |
0.0521 +- 0.0010 |
0.0559 +- 0.0012 |
0.0461 +- 0.0034 |
| -0.30 |
0.0513 +- 0.0010 |
0.0544 +- 0.0012 |
0.0423 +- 0.0034 |
| -0.10 |
0.0527 +- 0.0010 |
0.0552 +- 0.0012 |
0.0472 +- 0.0034 |
| 0.10 |
0.0512 +- 0.0010 |
0.0558 +- 0.0012 |
0.0460 +- 0.0034 |
| 0.30 |
0.0511 +- 0.0010 |
0.0549 +- 0.0012 |
0.0419 +- 0.0034 |
| 0.50 |
0.0514 +- 0.0010 |
0.0538 +- 0.0012 |
0.0444 +- 0.0033 |
| 0.70 |
0.0507 +- 0.0010 |
0.0532 +- 0.0012 |
0.0438 +- 0.0033 |
| 0.90 |
0.0486 +- 0.0011 |
0.0506 +- 0.0013 |
0.0425 +- 0.0035 |
| 1.15 |
0.0457 +- 0.0012 |
0.0472 +- 0.0014 |
0.0424 +- 0.0040 |
| 10%-16% |
-1.15 |
0.0377 +- 0.0012 |
0.0402 +- 0.0014 |
0.0449 +- 0.0058 |
| -0.90 |
0.0401 +- 0.0011 |
0.0413 +- 0.0013 |
0.0460 +- 0.0051 |
| -0.70 |
0.0407 +- 0.0010 |
0.0430 +- 0.0012 |
0.0362 +- 0.0051 |
| -0.50 |
0.0434 +- 0.0010 |
0.0457 +- 0.0012 |
0.0341 +- 0.0051 |
| -0.30 |
0.0411 +- 0.0010 |
0.0451 +- 0.0012 |
0.0292 +- 0.0053 |
| -0.10 |
0.0422 +- 0.0010 |
0.0463 +- 0.0012 |
0.0370 +- 0.0053 |
| 0.10 |
0.0415 +- 0.0010 |
0.0445 +- 0.0012 |
0.0318 +- 0.0053 |
| 0.30 |
0.0403 +- 0.0010 |
0.0429 +- 0.0012 |
0.0265 +- 0.0052 |
| 0.50 |
0.0409 +- 0.0010 |
0.0440 +- 0.0012 |
0.0286 +- 0.0051 |
| 0.70 |
0.0411 +- 0.0010 |
0.0435 +- 0.0012 |
0.0371 +- 0.0051 |
| 0.90 |
0.0393 +- 0.0011 |
0.0422 +- 0.0013 |
0.0351 +- 0.0055 |
| 1.15 |
0.0371 +- 0.0012 |
0.0387 +- 0.0015 |
0.0454 +- 0.0067 |
| 5%-10% |
-1.15 |
0.0298 +- 0.0014 |
0.0344 +- 0.0015 |
0.0144 +- 0.0081 |
| -0.90 |
0.0302 +- 0.0013 |
0.0332 +- 0.0014 |
0.0233 +- 0.0073 |
| -0.70 |
0.0319 +- 0.0012 |
0.0337 +- 0.0013 |
0.0305 +- 0.0068 |
| -0.50 |
0.0301 +- 0.0012 |
0.0344 +- 0.0013 |
0.0310 +- 0.0069 |
| -0.30 |
0.0302 +- 0.0012 |
0.0322 +- 0.0013 |
0.0173 +- 0.0071 |
| -0.10 |
0.0325 +- 0.0012 |
0.0336 +- 0.0013 |
0.0283 +- 0.0072 |
| 0.10 |
0.0319 +- 0.0012 |
0.0325 +- 0.0013 |
0.0190 +- 0.0072 |
| 0.30 |
0.0290 +- 0.0012 |
0.0338 +- 0.0013 |
0.0178 +- 0.0071 |
| 0.50 |
0.0312 +- 0.0012 |
0.0328 +- 0.0013 |
0.0182 +- 0.0069 |
| 0.70 |
0.0305 +- 0.0012 |
0.0323 +- 0.0013 |
0.0327 +- 0.0069 |
| 0.90 |
0.0270 +- 0.0013 |
0.0279 +- 0.0014 |
0.0302 +- 0.0075 |
| 1.15 |
0.0294 +- 0.0015 |
0.0312 +- 0.0016 |
0.0193 +- 0.0088 |
| 0%-5% |
-1.15 |
0.0209 +- 0.0015 |
0.0220 +- 0.0016 |
0.0716 +- 0.0553 |
| -0.90 |
0.0194 +- 0.0014 |
0.0206 +- 0.0014 |
-0.0156 +- 0.0500 |
| -0.70 |
0.0203 +- 0.0012 |
0.0205 +- 0.0013 |
0.1035 +- 0.0470 |
| -0.50 |
0.0195 +- 0.0013 |
0.0207 +- 0.0013 |
-0.0460 +- 0.0483 |
| -0.30 |
0.0223 +- 0.0013 |
0.0248 +- 0.0013 |
0.0298 +- 0.0493 |
| -0.10 |
0.0201 +- 0.0013 |
0.0215 +- 0.0013 |
0.0636 +- 0.0502 |
| 0.10 |
0.0207 +- 0.0013 |
0.0224 +- 0.0013 |
0.0163 +- 0.0495 |
| 0.30 |
0.0194 +- 0.0013 |
0.0184 +- 0.0013 |
0.0200 +- 0.0487 |
| 0.50 |
0.0192 +- 0.0013 |
0.0194 +- 0.0013 |
-0.0186 +- 0.0478 |
| 0.70 |
0.0192 +- 0.0012 |
0.0211 +- 0.0013 |
-0.0379 +- 0.0476 |
| 0.90 |
0.0175 +- 0.0014 |
0.0192 +- 0.0014 |
-0.0129 +- 0.0525 |
| 1.15 |
0.0174 +- 0.0016 |
0.0200 +- 0.0016 |
-0.1400 +- 0.0635 |
Fig. 15. Reconstructed v2 versus pt from the conventional method(circles), from the second-order cumulant method(triangles), and from the fourth-order cumualnt method (stars), in eight centrality bins.
Eta range for the plot is -1.3-1.3. Errors are statistical.
| centrality |
pt (GeV/c) |
v2 from stand event plane method |
v2 from 2nd order cumulant method |
v2 from 4th order cumulant method |
| 53%-77% |
0.15 |
0.0184 + 0.0022 - 0.0022 |
0.0186 + 0.0024 - 0.0024 |
0.0375 + 0.0315 - 0.0315 |
| 0.30 |
0.0377 + 0.0013 - 0.0013 |
0.0357 + 0.0015 - 0.0015 |
0.0355 + 0.0195 - 0.0195 |
| 0.50 |
0.0678 + 0.0017 - 0.0017 |
0.0670 + 0.0018 - 0.0018 |
0.0439 + 0.0241 - 0.0241 |
| 0.70 |
0.0979 + 0.0022 - 0.0022 |
0.0975 + 0.0024 - 0.0024 |
0.0474 + 0.0318 - 0.0318 |
| 0.90 |
0.1222 + 0.0029 - 0.0029 |
0.1212 + 0.0032 - 0.0032 |
0.1002 + 0.0433 - 0.0433 |
| 1.10 |
0.1495 + 0.0039 - 0.0039 |
0.1413 + 0.0043 - 0.0043 |
0.1094 + 0.0572 - 0.0572 |
| 1.30 |
0.1673 + 0.0052 - 0.0052 |
0.1662 + 0.0057 - 0.0057 |
0.0792 + 0.0741 - 0.0741 |
| 1.50 |
0.1902 + 0.0068 - 0.0068 |
0.1829 + 0.0075 - 0.0075 |
0.1166 + 0.1057 - 0.1057 |
| 1.70 |
0.2059 + 0.0089 - 0.0089 |
0.1944 + 0.0099 - 0.0099 |
0.3321 + 0.1432 - 0.1432 |
| 1.90 |
0.2354 + 0.0116 - 0.0116 |
0.2354 + 0.0128 - 0.0128 |
0.1208 + 0.1668 - 0.1668 |
| 2.17 |
0.2308 + 0.0118 - 0.0118 |
0.2372 + 0.0133 - 0.0133 |
0.3320 + 0.2269 - 0.2269 |
| 2.58 |
0.2612 + 0.0196 - 0.0196 |
0.2559 + 0.0225 - 0.0225 |
0.1045 + 0.3273 - 0.3273 |
| 2.98 |
0.2783 + 0.0307 - 0.0307 |
0.2542 + 0.0354 - 0.0354 |
0.5404 + 0.5334 - 0.5334 |
| 3.38 |
0.3047 + 0.0461 - 0.0461 |
0.3683 + 0.0551 - 0.0551 |
-2.0703 + 1.6467 - 1.6467 |
| 41%-53% |
0.15 |
0.0172 + 0.0013 - 0.0013 |
0.0177 + 0.0015 - 0.0015 |
0.0099 + 0.0081 - 0.0081 |
| 0.30 |
0.0359 + 0.0008 - 0.0008 |
0.0367 + 0.0009 - 0.0009 |
0.0351 + 0.0047 - 0.0047 |
| 0.50 |
0.0653 + 0.0010 - 0.0010 |
0.0675 + 0.0011 - 0.0011 |
0.0482 + 0.0059 - 0.0059 |
| 0.70 |
0.0910 + 0.0012 - 0.0012 |
0.0936 + 0.0015 - 0.0015 |
0.0804 + 0.0077 - 0.0077 |
| 0.90 |
0.1171 + 0.0016 - 0.0016 |
0.1219 + 0.0019 - 0.0019 |
0.0962 + 0.0101 - 0.0101 |
| 1.10 |
0.1380 + 0.0021 - 0.0021 |
0.1415 + 0.0025 - 0.0025 |
0.1020 + 0.0133 - 0.0133 |
| 1.30 |
0.1583 + 0.0028 - 0.0028 |
0.1690 + 0.0033 - 0.0033 |
0.1241 + 0.0177 - 0.0177 |
| 1.50 |
0.1752 + 0.0036 - 0.0036 |
0.1775 + 0.0043 - 0.0043 |
0.1529 + 0.0231 - 0.0231 |
| 1.70 |
0.1911 + 0.0047 - 0.0047 |
0.2015 + 0.0056 - 0.0056 |
0.1713 + 0.0310 - 0.0310 |
| 1.90 |
0.2056 + 0.0060 - 0.0060 |
0.2135 + 0.0072 - 0.0072 |
0.1633 + 0.0395 - 0.0395 |
| 2.17 |
0.2163 + 0.0062 - 0.0062 |
0.2372 + 0.0075 - 0.0075 |
0.1205 + 0.0438 - 0.0438 |
| 2.58 |
0.2379 + 0.0101 - 0.0101 |
0.2728 + 0.0121 - 0.0121 |
0.2011 + 0.0654 - 0.0654 |
| 2.98 |
0.2409 + 0.0160 - 0.0160 |
0.2299 + 0.0194 - 0.0194 |
0.1821 + 0.1088 - 0.1088 |
| 3.38 |
0.2549 + 0.0248 - 0.0248 |
0.2566 + 0.0295 - 0.0295 |
0.3712 + 0.1451 - 0.1451 |
| 31%-41% |
0.15 |
0.0149 + 0.0011 - 0.0011 |
0.0150 + 0.0012 - 0.0012 |
0.0026 + 0.0041 - 0.0041 |
| 0.30 |
0.0335 + 0.0006 - 0.0006 |
0.0350 + 0.0007 - 0.0007 |
0.0270 + 0.0024 - 0.0024 |
| 0.50 |
0.0610 + 0.0007 - 0.0007 |
0.0638 + 0.0009 - 0.0009 |
0.0495 + 0.0030 - 0.0030 |
| 0.70 |
0.0862 + 0.0010 - 0.0010 |
0.0910 + 0.0011 - 0.0011 |
0.0715 + 0.0038 - 0.0038 |
| 0.90 |
0.1105 + 0.0012 - 0.0012 |
0.1150 + 0.0015 - 0.0015 |
0.0990 + 0.0049 - 0.0049 |
| 1.10 |
0.1295 + 0.0016 - 0.0016 |
0.1345 + 0.0019 - 0.0019 |
0.1146 + 0.0064 - 0.0064 |
| 1.30 |
0.1460 + 0.0021 - 0.0021 |
0.1534 + 0.0025 - 0.0025 |
0.1421 + 0.0084 - 0.0084 |
| 1.50 |
0.1669 + 0.0027 - 0.0027 |
0.1772 + 0.0032 - 0.0032 |
0.1442 + 0.0110 - 0.0110 |
| 1.70 |
0.1805 + 0.0035 - 0.0035 |
0.1901 + 0.0042 - 0.0042 |
0.1780 + 0.0143 - 0.0143 |
| 1.90 |
0.1896 + 0.0046 - 0.0046 |
0.1940 + 0.0055 - 0.0055 |
0.1597 + 0.0190 - 0.0190 |
| 2.17 |
0.2017 + 0.0046 - 0.0046 |
0.2155 + 0.0056 - 0.0056 |
0.1676 + 0.0200 - 0.0200 |
| 2.58 |
0.2143 + 0.0076 - 0.0076 |
0.2198 + 0.0092 - 0.0092 |
0.1779 + 0.0314 - 0.0314 |
| 2.98 |
0.2134 + 0.0124 - 0.0124 |
0.2114 + 0.0150 - 0.0150 |
0.1399 + 0.0533 - 0.0533 |
| 3.38 |
0.2322 + 0.0195 - 0.0195 |
0.2470 + 0.0237 - 0.0237 |
0.2142 + 0.0985 - 0.0985 |
| 24%-31% |
0.15 |
0.0118 + 0.0010 - 0.0010 |
0.0133 + 0.0012 - 0.0012 |
0.0132 + 0.0035 - 0.0035 |
| 0.30 |
0.0297 + 0.0006 - 0.0006 |
0.0306 + 0.0007 - 0.0007 |
0.0266 + 0.0020 - 0.0020 |
| 0.50 |
0.0553 + 0.0007 - 0.0007 |
0.0574 + 0.0008 - 0.0008 |
0.0496 + 0.0024 - 0.0024 |
| 0.70 |
0.0773 + 0.0009 - 0.0009 |
0.0808 + 0.0010 - 0.0010 |
0.0673 + 0.0031 - 0.0031 |
| 0.90 |
0.1002 + 0.0011 - 0.0011 |
0.1041 + 0.0013 - 0.0013 |
0.0897 + 0.0040 - 0.0040 |
| 1.10 |
0.1142 + 0.0015 - 0.0015 |
0.1200 + 0.0017 - 0.0017 |
0.1006 + 0.0053 - 0.0053 |
| 1.30 |
0.1328 + 0.0019 - 0.0019 |
0.1411 + 0.0022 - 0.0022 |
0.1067 + 0.0069 - 0.0069 |
| 1.50 |
0.1503 + 0.0025 - 0.0025 |
0.1586 + 0.0029 - 0.0029 |
0.1398 + 0.0088 - 0.0088 |
| 1.70 |
0.1644 + 0.0032 - 0.0032 |
0.1719 + 0.0038 - 0.0038 |
0.1373 + 0.0116 - 0.0116 |
| 1.90 |
0.1730 + 0.0041 - 0.0041 |
0.1825 + 0.0049 - 0.0049 |
0.1305 + 0.0156 - 0.0156 |
| 2.17 |
0.1833 + 0.0042 - 0.0042 |
0.1960 + 0.0051 - 0.0051 |
0.1871 + 0.0161 - 0.0161 |
| 2.58 |
0.1964 + 0.0069 - 0.0069 |
0.2083 + 0.0082 - 0.0082 |
0.1376 + 0.0273 - 0.0273 |
| 2.98 |
0.2077 + 0.0112 - 0.0112 |
0.2110 + 0.0135 - 0.0135 |
0.1412 + 0.0445 - 0.0445 |
| 3.38 |
0.2025 + 0.0178 - 0.0178 |
0.2090 + 0.0218 - 0.0218 |
0.1998 + 0.0617 - 0.0617 |
| 16%-24% |
0.15 |
0.0106 + 0.0009 - 0.0009 |
0.0126 + 0.0011 - 0.0011 |
0.0047 + 0.0031 - 0.0031 |
| 0.30 |
0.0247 + 0.0005 - 0.0005 |
0.0264 + 0.0006 - 0.0006 |
0.0228 + 0.0018 - 0.0018 |
| 0.50 |
0.0460 + 0.0006 - 0.0006 |
0.0488 + 0.0008 - 0.0008 |
0.0423 + 0.0021 - 0.0021 |
| 0.70 |
0.0649 + 0.0008 - 0.0008 |
0.0693 + 0.0010 - 0.0010 |
0.0573 + 0.0027 - 0.0027 |
| 0.90 |
0.0827 + 0.0010 - 0.0010 |
0.0873 + 0.0012 - 0.0012 |
0.0679 + 0.0035 - 0.0035 |
| 1.10 |
0.0998 + 0.0013 - 0.0013 |
0.1017 + 0.0016 - 0.0016 |
0.0869 + 0.0045 - 0.0045 |
| 1.30 |
0.1163 + 0.0017 - 0.0017 |
0.1224 + 0.0020 - 0.0020 |
0.1085 + 0.0058 - 0.0058 |
| 1.50 |
0.1254 + 0.0022 - 0.0022 |
0.1308 + 0.0026 - 0.0026 |
0.1055 + 0.0075 - 0.0075 |
| 1.70 |
0.1409 + 0.0029 - 0.0029 |
0.1464 + 0.0034 - 0.0034 |
0.1186 + 0.0098 - 0.0098 |
| 1.90 |
0.1507 + 0.0037 - 0.0037 |
0.1622 + 0.0044 - 0.0044 |
0.1263 + 0.0129 - 0.0129 |
| 2.17 |
0.1584 + 0.0038 - 0.0038 |
0.1666 + 0.0046 - 0.0046 |
0.1118 + 0.0130 - 0.0130 |
| 2.58 |
0.1774 + 0.0064 - 0.0064 |
0.1957 + 0.0076 - 0.0076 |
0.1312 + 0.0215 - 0.0215 |
| 2.98 |
0.1812 + 0.0103 - 0.0103 |
0.1889 + 0.0124 - 0.0124 |
0.1206 + 0.0371 - 0.0371 |
| 3.38 |
0.1858 + 0.0165 - 0.0165 |
0.2091 + 0.0198 - 0.0198 |
0.1821 + 0.0538 - 0.0538 |
| 10%-16% |
0.15 |
0.0080 + 0.0010 - 0.0010 |
0.0087 + 0.0011 - 0.0011 |
0.0100 + 0.0048 - 0.0048 |
| 0.30 |
0.0195 + 0.0005 - 0.0005 |
0.0206 + 0.0006 - 0.0006 |
0.0188 + 0.0027 - 0.0027 |
| 0.50 |
0.0360 + 0.0006 - 0.0006 |
0.0379 + 0.0008 - 0.0008 |
0.0305 + 0.0032 - 0.0032 |
| 0.70 |
0.0525 + 0.0008 - 0.0008 |
0.0553 + 0.0010 - 0.0010 |
0.0467 + 0.0041 - 0.0041 |
| 0.90 |
0.0667 + 0.0011 - 0.0011 |
0.0710 + 0.0012 - 0.0012 |
0.0543 + 0.0054 - 0.0054 |
| 1.10 |
0.0825 + 0.0014 - 0.0014 |
0.0888 + 0.0016 - 0.0016 |
0.0721 + 0.0068 - 0.0068 |
| 1.30 |
0.0956 + 0.0017 - 0.0017 |
0.1042 + 0.0020 - 0.0020 |
0.0745 + 0.0090 - 0.0090 |
| 1.50 |
0.1075 + 0.0022 - 0.0022 |
0.1165 + 0.0026 - 0.0026 |
0.0959 + 0.0114 - 0.0114 |
| 1.70 |
0.1106 + 0.0029 - 0.0029 |
0.1207 + 0.0034 - 0.0034 |
0.0842 + 0.0152 - 0.0152 |
| 1.90 |
0.1191 + 0.0038 - 0.0038 |
0.1308 + 0.0045 - 0.0045 |
0.0904 + 0.0188 - 0.0188 |
| 2.17 |
0.1325 + 0.0039 - 0.0039 |
0.1424 + 0.0046 - 0.0046 |
0.1095 + 0.0195 - 0.0195 |
| 2.58 |
0.1432 + 0.0065 - 0.0065 |
0.1581 + 0.0077 - 0.0077 |
0.1251 + 0.0334 - 0.0334 |
| 2.98 |
0.1450 + 0.0108 - 0.0108 |
0.1748 + 0.0126 - 0.0126 |
0.1605 + 0.0521 - 0.0521 |
| 3.38 |
0.1480 + 0.0165 - 0.0165 |
0.1562 + 0.0195 - 0.0195 |
0.1328 + 0.0896 - 0.0896 |
| 5%-10% |
0.15 |
0.0043 + 0.0011 - 0.0011 |
0.0055 + 0.0012 - 0.0012 |
-0.0055 + 0.0066 - 0.0066 |
| 0.30 |
0.0138 + 0.0006 - 0.0006 |
0.0143 + 0.0007 - 0.0007 |
0.0118 + 0.0037 - 0.0037 |
| 0.50 |
0.0272 + 0.0008 - 0.0008 |
0.0286 + 0.0008 - 0.0008 |
0.0250 + 0.0044 - 0.0044 |
| 0.70 |
0.0405 + 0.0010 - 0.0010 |
0.0450 + 0.0010 - 0.0010 |
0.0291 + 0.0056 - 0.0056 |
| 0.90 |
0.0503 + 0.0012 - 0.0012 |
0.0536 + 0.0013 - 0.0013 |
0.0368 + 0.0071 - 0.0071 |
| 1.10 |
0.0616 + 0.0016 - 0.0016 |
0.0671 + 0.0017 - 0.0017 |
0.0407 + 0.0093 - 0.0093 |
| 1.30 |
0.0682 + 0.0020 - 0.0020 |
0.0749 + 0.0022 - 0.0022 |
0.0765 + 0.0119 - 0.0119 |
| 1.50 |
0.0751 + 0.0026 - 0.0026 |
0.0832 + 0.0029 - 0.0029 |
0.0663 + 0.0153 - 0.0153 |
| 1.70 |
0.0918 + 0.0034 - 0.0034 |
0.0971 + 0.0038 - 0.0038 |
0.0893 + 0.0204 - 0.0204 |
| 1.90 |
0.0975 + 0.0044 - 0.0044 |
0.1038 + 0.0049 - 0.0049 |
0.0118 + 0.0262 - 0.0262 |
| 2.17 |
0.1013 + 0.0046 - 0.0046 |
0.1068 + 0.0050 - 0.0050 |
0.1133 + 0.0271 - 0.0271 |
| 2.58 |
0.1192 + 0.0077 - 0.0077 |
0.1243 + 0.0085 - 0.0085 |
0.1071 + 0.0450 - 0.0450 |
| 2.98 |
0.1152 + 0.0126 - 0.0126 |
0.1363 + 0.0140 - 0.0140 |
0.0280 + 0.0766 - 0.0766 |
| 3.38 |
0.1003 + 0.0199 - 0.0199 |
0.1097 + 0.0219 - 0.0219 |
-0.1174 + 0.1151 - 0.1151 |
| 0%-5% |
0.15 |
0.0028 + 0.0012 - 0.0012 |
0.0013 + 0.0012 - 0.0012 |
0.0202 + 0.0459 - 0.0459 |
| 0.30 |
0.0084 + 0.0007 - 0.0007 |
0.0083 + 0.0007 - 0.0007 |
-0.0145 + 0.0259 - 0.0259 |
| 0.50 |
0.0173 + 0.0008 - 0.0008 |
0.0188 + 0.0008 - 0.0008 |
0.0500 + 0.0306 - 0.0306 |
| 0.70 |
0.0262 + 0.0010 - 0.0010 |
0.0279 + 0.0010 - 0.0010 |
-0.0648 + 0.0385 - 0.0385 |
| 0.90 |
0.0342 + 0.0013 - 0.0013 |
0.0373 + 0.0013 - 0.0013 |
0.0501 + 0.0496 - 0.0496 |
| 1.10 |
0.0405 + 0.0017 - 0.0017 |
0.0431 + 0.0017 - 0.0017 |
-0.0269 + 0.0635 - 0.0635 |
| 1.30 |
0.0453 + 0.0022 - 0.0022 |
0.0469 + 0.0022 - 0.0022 |
0.1161 + 0.0822 - 0.0822 |
| 1.50 |
0.0478 + 0.0028 - 0.0028 |
0.0557 + 0.0029 - 0.0029 |
-0.1199 + 0.1051 - 0.1051 |
| 1.70 |
0.0571 + 0.0036 - 0.0036 |
0.0590 + 0.0037 - 0.0037 |
0.2266 + 0.1394 - 0.1394 |
| 1.90 |
0.0663 + 0.0047 - 0.0047 |
0.0728 + 0.0049 - 0.0049 |
-0.1165 + 0.1833 - 0.1833 |
| 2.17 |
0.0700 + 0.0049 - 0.0049 |
0.0781 + 0.0050 - 0.0050 |
0.0096 + 0.1888 - 0.1888 |
| 2.58 |
0.0696 + 0.0083 - 0.0083 |
0.0805 + 0.0086 - 0.0086 |
0.0173 + 0.3273 - 0.3273 |
| 2.98 |
0.0809 + 0.0136 - 0.0136 |
0.0925 + 0.0140 - 0.0140 |
-0.3531 + 0.5173 - 0.5173 |
| 3.38 |
0.0688 + 0.0218 - 0.0218 |
0.0825 + 0.0228 - 0.0228 |
0.4447 + 0.8089 - 0.8089 |
Fig. 16. Elliptic flow versus pseudorapidity from the conventional method(circles), from the 2nd order cumulant method(triangles), from the 4th order cumulant method(stars), and from the quarter events(crosses), averaged over all centralities from bin 2-7, as defined in Figs. 14 and 15.
pt range for the plot is 0.1-8GeV/c. Errors are statistical.
| pseudorapidity |
v2 from stand event plane method |
v2 from 2nd order cumulant method |
v2 from 4th order cumulant method |
v2 from quater events |
| -1.15 |
0.0463 +- 0.0005 |
0.0489 +- 0.0006 |
0.0399 +- 0.0026 |
0.0456 +- 0.0019 |
| -0.90 |
0.0483 +- 0.0005 |
0.0510 +- 0.0006 |
0.0436 +- 0.0024 |
0.0392 +- 0.0017 |
| -0.70 |
0.0503 +- 0.0005 |
0.0529 +- 0.0005 |
0.0440 +- 0.0023 |
0.0464 +- 0.0016 |
| -0.50 |
0.0514 +- 0.0005 |
0.0545 +- 0.0005 |
0.0435 +- 0.0023 |
0.0479 +- 0.0016 |
| -0.30 |
0.0511 +- 0.0005 |
0.0544 +- 0.0006 |
0.0412 +- 0.0023 |
0.0454 +- 0.0016 |
| -0.10 |
0.0522 +- 0.0005 |
0.0549 +- 0.0006 |
0.0451 +- 0.0023 |
0.0425 +- 0.0017 |
| 0.10 |
0.0522 +- 0.0005 |
0.0545 +- 0.0006 |
0.0412 +- 0.0023 |
0.0477 +- 0.0020 |
| 0.30 |
0.0509 +- 0.0005 |
0.0542 +- 0.0006 |
0.0403 +- 0.0023 |
0.0459 +- 0.0020 |
| 0.50 |
0.0514 +- 0.0005 |
0.0539 +- 0.0005 |
0.0424 +- 0.0023 |
0.0428 +- 0.0020 |
| 0.70 |
0.0493 +- 0.0005 |
0.0513 +- 0.0005 |
0.0442 +- 0.0023 |
0.0461 +- 0.0019 |
| 0.90 |
0.0470 +- 0.0005 |
0.0491 +- 0.0006 |
0.0406 +- 0.0024 |
0.0428 +- 0.0021 |
| 1.15 |
0.0460 +- 0.0006 |
0.0483 +- 0.0007 |
0.0416 +- 0.0028 |
0.0452 +- 0.0023 |
Fig. 17. Elliptic flow versus transverse momentum from the conventional method(circles), from the 2nd order cumulant method (triangles), from 4th order cumulant method (stars), and from quarter events (crosses), averaged over allcentralities from bin 2-7, as defined in Figs. 14 and 15.
Eta range for the plot is -1.3 - 1.3. Errors are statistical.
| pt (GeV/c) |
v2 from stand event plane method |
v2 from 2nd order cumulant method |
v2 from 4th order cumulant method |
v2 from quater events |
| 0.15 |
0.0106 + 0.0004 - 0.0004 |
0.0116 + 0.0005 - 0.0005 |
0.0055 + 0.0021 - 0.0021 |
0.0105 + 0.0016 - 0.0016 |
| 0.30 |
0.0250 + 0.0002 - 0.0002 |
0.0260 + 0.0003 - 0.0003 |
0.0226 + 0.0012 - 0.0012 |
0.0310 + 0.0009 - 0.0009 |
| 0.50 |
0.0461 + 0.0003 - 0.0003 |
0.0482 + 0.0003 - 0.0003 |
0.0393 + 0.0014 - 0.0014 |
0.0393 + 0.0011 - 0.0011 |
| 0.70 |
0.0653 + 0.0004 - 0.0004 |
0.0690 + 0.0004 - 0.0004 |
0.0555 + 0.0018 - 0.0018 |
0.0508 + 0.0014 - 0.0014 |
| 0.90 |
0.0831 + 0.0005 - 0.0005 |
0.0872 + 0.0006 - 0.0006 |
0.0695 + 0.0024 - 0.0024 |
0.0651 + 0.0018 - 0.0018 |
| 1.10 |
0.0987 + 0.0006 - 0.0006 |
0.1034 + 0.0007 - 0.0007 |
0.0819 + 0.0031 - 0.0031 |
0.0829 + 0.0024 - 0.0024 |
| 1.30 |
0.1131 + 0.0008 - 0.0008 |
0.1206 + 0.0009 - 0.0009 |
0.1007 + 0.0040 - 0.0040 |
0.0965 + 0.0031 - 0.0031 |
| 1.50 |
0.1259 + 0.0010 - 0.0010 |
0.1332 + 0.0012 - 0.0012 |
0.1107 + 0.0052 - 0.0052 |
0.1106 + 0.0040 - 0.0040 |
| 1.70 |
0.1385 + 0.0014 - 0.0014 |
0.1461 + 0.0016 - 0.0016 |
0.1215 + 0.0069 - 0.0069 |
0.1301 + 0.0052 - 0.0052 |
| 1.90 |
0.1474 + 0.0018 - 0.0018 |
0.1559 + 0.0021 - 0.0021 |
0.1038 + 0.0088 - 0.0088 |
0.1346 + 0.0068 - 0.0068 |
| 2.17 |
0.1570 + 0.0018 - 0.0018 |
0.1675 + 0.0021 - 0.0021 |
0.1323 + 0.0092 - 0.0092 |
0.1352 + 0.0070 - 0.0070 |
| 2.58 |
0.1732 + 0.0030 - 0.0030 |
0.1868 + 0.0035 - 0.0035 |
0.1396 + 0.0150 - 0.0150 |
0.1424 + 0.0116 - 0.0116 |
| 2.98 |
0.1762 + 0.0049 - 0.0049 |
0.1868 + 0.0058 - 0.0058 |
0.1228 + 0.0250 - 0.0250 |
0.1637 + 0.0188 - 0.0188 |
| 3.38 |
0.1784 + 0.0077 - 0.0077 |
0.1893 + 0.0091 - 0.0091 |
0.1414 + 0.0384 - 0.0384 |
0.1893 + 0.0295 - 0.0295 |
| 4.03 |
0.1658 + 0.0089 - 0.0089 |
0.1763 + 0.0104 - 0.0104 |
0.1192 + 0.0478 - 0.0478 |
0.1317 + 0.0337 - 0.0337 |
Fig. 18. The ratio of v2 from the 4th order cumulant divided by v2, from the conventional method as a function of pt, averaged over all centralities from bin 2-7, as defined in Figs. 14 and 15.
Eta range for the plot is -1.3 - 1.3. Errors are statistical.
| pt (GeV/c) |
ratio of v2 |
| 0.15 |
0.52 + 0.20 - 0.20 |
| 0.30 |
0.90 + 0.05 - 0.05 |
| 0.50 |
0.85 + 0.03 - 0.03 |
| 0.70 |
0.85 + 0.03 - 0.03 |
| 0.90 |
0.84 + 0.03 - 0.03 |
| 1.10 |
0.83 + 0.03 - 0.03 |
| 1.30 |
0.89 + 0.04 - 0.04 |
| 1.50 |
0.88 + 0.04 - 0.04 |
| 1.70 |
0.88 + 0.05 - 0.05 |
| 1.90 |
0.70 + 0.06 - 0.06 |
| 2.17 |
0.84 + 0.06 - 0.06 |
| 2.58 |
0.81 + 0.09 - 0.09 |
| 2.98 |
0.70 + 0.14 - 0.14 |
| 3.38 |
0.79 + 0.22 - 0.22 |
| 4.03 |
0.72 + 0.29 - 0.29 |
Fig. 19. The ratio of v2 from quarter events divided by the conventional v2 as a function of pt. In both cases, event planes were constructed from low-pt ( less than 0.5GeV/c) particles. The data are averaged over all centralities from bin 2-7, as defined in Figs. 14 and 15.
Eta range for the plot is -1.3 - 1.3. Errors are statistical.
| pt (GeV/c) |
ratio of v2 |
| 0.15 |
0.65 + 0.11 - 0.11 |
| 0.30 |
1.07 + 0.04 - 0.04 |
| 0.50 |
0.88 + 0.03 - 0.03 |
| 0.70 |
0.83 + 0.03 - 0.03 |
| 0.90 |
0.83 + 0.03 - 0.03 |
| 1.10 |
0.88 + 0.03 - 0.03 |
| 1.30 |
0.91 + 0.03 - 0.03 |
| 1.50 |
0.90 + 0.04 - 0.04 |
| 1.70 |
0.93 + 0.04 - 0.04 |
| 1.90 |
0.95 + 0.05 - 0.05 |
| 2.17 |
0.92 + 0.05 - 0.05 |
| 2.60 |
0.90 + 0.08 - 0.08 |
| 3.00 |
0.91 + 0.12 - 0.12 |
| 3.40 |
1.19 + 0.22 - 0.22 |
| 4.05 |
0.97 + 0.28 - 0.28 |
Fig. 22. v2/ε as a function of charged particle density in Au + Au collisions.
Data are from E877 at the AGS (squares), NA49 at the SPS (circles), and STAR at RHIC
(stars). The AGS and SPS data have been obtained by conventional flow
analysis. The STAR measurements are at sqrt(sNN) = 130 GeV, and
correspond to the final corrected elliptic flow based on 4th-order
cumulants (integrated over pt 0.1-2 GeV/c, eta -1.3-1.3,
corrected for the b fluctuation), and we assume dN/dy = 1.15 dN/d&eta.
The horizontal shaded bands indicate the hydrodynamic limits for different beam
energies. The hydro band range for Sqrt(SNN) = 130 GeV is
0.19 - 0.21, and for Sqrt(SNN) = 17 GeV is 0.22 - 0.235.
| |
1/S dN/dy (fm -2) |
v2/&eps |
| STAR |
6.36 |
0.12 +- 0.03 |
| 13.60 |
0.13 +- 0.01 |
| 16.27 |
0.14 +- 0.00 |
| 19.37 |
0.16 +- 0.00 |
| 21.43 |
0.17 +- 0.00 |
| 22.72 |
0.18 +- 0.01 |
| 23.71 |
0.18 +- 0.02 |
| 24.85 |
0.21 +- 0.25 |
| E877 |
4.12 |
0.03 +- 0.01 |
| 6.08 |
0.07 +- 0.01 |
| 7.51 |
0.09 +- 0.01 |
| 8.35 |
0.09 +- 0.03 |
NA49 |
| 14.48 |
0.14 +- 0.01 |
| 13.26 |
0.11 +- 0.01 |
| 11.54 |
0.11 +- 0.00 |
| 9.61 |
0.10 +- 0.00 |
| 7.67 |
0.09 +- 0.01 |