DeltaDoverD Progress

The goal

Fragmentation Function test

A complete test of independent fragmentation can be performed with polarized proton and neutron targets. The ratio of the difference of polarized to unpolarized cross sections for proton and neutron targets [math]\Delta R_{np}^{\pi^+ + \pi^-}[/math] can be written in terms of the structure functions:

[math]\Delta R_{np}^{\pi^+ + \pi^-} = \frac{\Delta \sigma_p^{\pi^+ + \pi^-} - \Delta \sigma_{n}^{\pi^+ + \pi^-}}{\sigma_p^{\pi^+ + \pi^-} - \sigma_{n}^{\pi^+ + \pi^-}}= \frac{g_1^p - g_1^n}{F_1^p - F_1^n}(x,Q^2)[/math]

Delta d over d

[math]\frac{\Delta d_v}{d_v}(x,Q^2) = \frac{\Delta \sigma_p^{\pi^+ \pm \pi^-} - 4\Delta \sigma_{2H}^{\pi^+ \pm \pi^-}}{\sigma_p^{\pi^+ \pm \pi^-} - 4\sigma_{2H}^{\pi^+ \pm \pi^-}} (x,Q^2)[/math]

1/24/2011

1.) Find energy range with substantial ND3, pi- events when B <0.

Ratio plot for Q^2 and X_{BJ}

once you find the Q^2 and X_BJ range holding a reasonable amount of data.

2.) Inclusive electron scattering ratio of

Inclusiveelectrons -vs- Q-squared	Inclusive Missing Mass (W) for 1.0 Q^2 <1.2
[[|300px|thumb|The ratio of inclusive electrons detected in scintillator paddle #7 when Btorus >0 (B_p)to inclusive electrons detected by paddle 11 when B<0(B_n) NH3 Target]]	[[|300px|thumb|The inclusive missing mass W for each torus setting. Dashed line is B>0 and solid line is B<0]]
[[|300px|thumb|The ratio of inclusive electrons detected in scintillator paddle #7 when Btorus >0 (B_p)to inclusive electrons detected by paddle 11 when B<0(B_n)]]ND3 Target	[[|300px|thumb|The inclusive missing mass W for each torus setting. Dashed line is B>0 and solid line is B<0]]
[[|300px|thumb|The ratio of inclusive electrons detected in scintillator paddle #7 when Btorus >0 (B_p)to inclusive electrons detected by paddle 11 when B<0(B_n)]] Both Targets	300px|thumb|The inclusive missing mass W for each torus setting. Dashed line is B>0 and solid line is B<0

3.) Semi Inclusive pion production ratios -vs- Q^2, Only electron cuts

/cache/mss/clas/eg1b/production/pass1/v4/4p2out/misc/dst/dst2828*

NH3 4.2-

28422 28423 28424 28425 28426 28427 28428 28429 28432 28433 28438 28439 28443 28445 28446 28447 28448 28449 28450 28456 28457 28458 28460 28461 28462 28463 28464 28467 28469 28471 28472 28473 28476 28478 28479

NH3 4.2+

28240 28242 28244 28245 28246 28247 28249 28250 28252 28253 28254 28255 28256 28260 28261 28262 28263 28264 28265 28266 28272 28274 28275 28276 28277

File locations http://www.jlab.org/Hall-B/secure/eg1/EG2000/nevzat/UPGRADE_DST/

/cache/mss/home/nguler/dst

Rates before and after requiring pions

all the cuts are applied, except NPHE>2.5 cut.

4.2 GeV, ND3 target, 98 files, B<0[math]\frac{\mbox{SemiInclusive Events}}{\mbox{Inclusive Events}}= 14.5% [/math]

4.2 GeV, ND3 target, 32 files, B>0[math]\frac{\mbox{SemiInclusive Events}}{\mbox{Inclusive Events}}= 4.4 %[/math]

The ratio for ND3 4.2 GeV data

Electron paddle selection

Inclusive

Electron Paddle Number(Inclusive, B<0, 4.2 GeV Beam, ND3 Target)	Electron Paddle Number(Inclusive, B>0, 4.2 GeV Beam, ND3 Target)

Semi-Inclusive

Electron Paddle Number(Semi-Inclusive, B<0, 4.2 GeV Beam, ND3 Target)	Electron Paddle Number(Semi-Inclusive, B>0, 4.2 GeV Beam, ND3 Target)

B>0, ND3 Electron paddle number=5

B<0, ND3 Electron paddle number=10

The Ratio

X_B	[math]\frac{ND3,Epaddle=5,B\gt 0}{ND3,Epaddle=10,B\lt 0}[/math] without pions	[math]\frac{ND3,Epaddle=5,B\gt 0}{ND3,Epaddle=10,B\lt 0}[/math] with pions
0.3	[math]1.01 \pm 0.02[/math]	[math] 1.2 \pm 0.1[/math]
0.35	[math]1.06 \pm 0.01[/math]	[math]1.1 \pm 0.06[/math]
0.4	[math]1.1 \pm 0.01[/math]	[math]1.03 \pm 0.08[/math]
0.45	[math]1.1 \pm 0.01[/math]	[math]1.1 \pm 0.09[/math]
0.5	[math]0.9 \pm 0.02[/math]	[math]0.6 \pm 0.2[/math]
0.55	[math]0.23 \pm 0.06[/math]	[math]0.13 \pm 0.5[/math]

The ratio for NH3 4.2 GeV data

Electron paddle selection

Inclusive

Electron Paddle Number(Inclusive, B<0, NH3 target, 4.2 GeV Beam)	Electron Paddle Number(Inclusive, B>0, NH3 target, 4.2 GeV Beam)

Semi-Inclusive

Electron Paddle Number(Semi-Inclusive, B<0, NH3 target, 4.2 GeV Beam)	Electron Paddle Number(Semi-Inclusive, B>0, NH3 target, 4.2 GeV Beam)

B>0, NH3 Electron paddle number=5

B<0, NH3 Electron paddle number=10

The Ratio

X_B	[math]\frac{NH3,Epaddle=5,B\gt 0}{NH3,Epaddle=10,B\lt 0}[/math] without pions	[math]\frac{NH3,Epaddle=5,B\gt 0}{NH3,Epaddle=10,B\lt 0}[/math] with pions
0.3	[math]1.02 \pm 0.01[/math]	[math] 1.2 \pm 0.03[/math]
0.35	[math]1.08 \pm 0.008[/math]	[math]1.01 \pm 0.02[/math]
0.4	[math]1.09 \pm 0.009[/math]	[math]1.04 \pm 0.02[/math]
0.45	[math]1.19 \pm 0.01[/math]	[math]1.1 \pm 0.03[/math]
0.5	[math]0.9 \pm 0.01[/math]	[math]0.8 \pm 0.03[/math]
0.55	[math]0.2 \pm 0.03[/math]	[math]0.18 \pm 0.09[/math]

1/31/11

Electron paddle number for B>0 is 5 and for B<0 - 10. The cut was applied on [math]X_B[/math] : [math]0.3\lt X_B\lt 0.6[/math]

Inclusive

 Are the ratio's from rates normalized with beam current measured by the FC?

 Is the conclusion that the NH3 and ND3 rates are indistinguishable?

1.) Overlap electron kinematic ([math]\theta[/math], W, Momentum) for B>0 and B<0 and ND3 and NH3.

(NH3,B>0), (NH3,B<0), (ND3,B>0) && (ND3,B<0)

Electron Momentum((NH3,B>0), (NH3,B<0), (ND3,B>0) && (ND3,B<0))	Electron [math]\theta[/math] Angle((NH3,B>0), (NH3,B<0), (ND3,B>0) && (ND3,B<0)); can create angle cut on electron to be sure flipping B-field contains same electrons	W mass((NH3,B>0), (NH3,B<0), (ND3,B>0) && (ND3,B<0))

2.) Now plot ratio (B< 0/B>0) electron kinematic ([math]\theta[/math], W, Momentum) for ND3 and NH3. ( I expect 2 curves in one plot)

[math]\frac{ND3 B\lt 0}{ND3 B\gt 0}[/math], [math]\frac{NH3 B\lt 0}{NH3 B\gt 0}[/math]

Electron Momentum([math]\frac{ND3 B\lt 0}{ND3 B\gt 0}[/math], [math]\frac{NH3 B\lt 0}{NH3 B\gt 0}[/math])	Electron [math]\theta[/math] Angle([math]\frac{ND3 B\lt 0}{ND3 B\gt 0}[/math], [math]\frac{NH3 B\lt 0}{NH3 B\gt 0}[/math])	W mass([math]\frac{ND3 B\lt 0}{ND3 B\gt 0}[/math], [math]\frac{NH3 B\lt 0}{NH3 B\gt 0}[/math])

2.) Target ratio (B< 0/B>0) Difference electron kinematic ([math]\theta[/math], W, Momentum) (Ration for ND3 target - Ratio for NH3 target). ( I expect 1 curves in one plot)

[math]\frac{ND3 B\lt 0}{ND3 B\gt 0} - \frac{NH3 B\lt 0}{NH3 B\gt 0}[/math]

Electron Momentum ([math]\frac{ND3 B\lt 0}{ND3 B\gt 0} - \frac{NH3 B\lt 0}{NH3 B\gt 0}[/math])	[math]\theta[/math] Theta Angle([math]\frac{ND3 B\lt 0}{ND3 B\gt 0} - \frac{NH3 B\lt 0}{NH3 B\gt 0}[/math])	W mass([math]\frac{ND3 B\lt 0}{ND3 B\gt 0} - \frac{NH3 B\lt 0}{NH3 B\gt 0}[/math])

Semi-Inclusive

(NH3,B>0), (NH3,B<0), (ND3,B>0) && (ND3,B<0)

Electron Momentum((NH3,B>0), (NH3,B<0), (ND3,B>0) && (ND3,B<0))	Electron [math]\theta[/math] Angle((NH3,B>0), (NH3,B<0), (ND3,B>0) && (ND3,B<0))	W mass((NH3,B>0), (NH3,B<0), (ND3,B>0) && (ND3,B<0))

2

2/7/11

1.) Now look a specific electron kinematic which appear to have unity ratio. P=2.5 GeV, \theta =18 degrees

W	NH3,B<0	NH3,B>0	ND3,B<0	ND3,B>0	NH3,B>0 - NH3,B<0	NH3,B>0 - NH3,B<0
1.72	[math]1.2 X 10^{-5} \pm 0.05[/math]	[math]2.9 × 10^{-5} \pm 0.04[/math]	[math]11.8 x 10^{-5} \pm 0.05[/math]	[math]2.1125 × 10^{-5} \pm 0.075[/math]	1.7	-9.7
1.74	[math] 3.9× 10^{-5} \pm 0.03[/math]	[math] 9.0 × 10^{-5} \pm 0.02[/math]	3[math]8.5x 10^{-5} \pm 0.03[/math]	[math]7.25 × 10^{-5} \pm 0.05[/math]	5.1	-3.2
1.76	[math]5.0× 10^{-5} \pm 0.024[/math]	[math]10 x 10_{-5} \pm 0.02[/math]	[math]51.8x 10^{-5} \pm 0.025[/math]	[math]8.2 × 10^{-5} \pm 0.047[/math]	5.0	-43.6
1.78	[math]4.2 × 10^{-5} \pm 0.03[/math]	[math] 8.4 × 10^{-5} \pm 0.02[/math]	[math]40.4x 10^{-5} \pm 0.03[/math]	[math]7.3 × 10^{-5} \pm 0.05[/math]	4.2	-33.1
1.8	[math] 5.8 × 10^{-6} \pm 0.07[/math]	[math] 1.4 × 10^{-5} \pm 0.05[/math]	[math]6.2 × 10-5 \pm 0.07[/math]	[math]1.05 × 10^{-5} \pm 0.1[/math]	0.8	-5.2

2.) Semi-Inclusive using above electrons

Paddle Number	Pion Momentum

3.) Semi-Inclusive using above electrons and choosing a single paddle from 2.)

Pi+/Pi- hitting paddle #	Pi+/Pi- hitting paddle #

2/14/11

1.) Get all files

2.) Do semi-inclusive paddle number for pions again

3.) Paddle Number ratio (with more files in order to double check, the same cuts on electrons)

2/23/11

1.) Plot pi^-/pi^+ -vs paddle #

2.) Paddle 7 has ratio 0f 0.9. Plot W, Q^2 and M_{\pi}

W

Q^2

3.) Paddle 25 has ratio 0f 0.3. Plot W, Q^2, M (our goal is to determine if the detector has same efficiency for detector same reaction when the Torus filed is flipped)

W

Q^2

3/04/11

Table. 1 Pion Paddle Number ratio

• 1.) ND3Bn/NH3Bp

Pion Paddle Number	Number of Events ND3Bn	Number of Events NH3Bp	Ratio(ND3Bn/NH3Bp) [math]\pm[/math] error
3.89	81	69	0.4 [math]\pm[/math] 0.000896
4.89	84	87	0.33 [math]\pm[/math] 0.000595
5.89	84	76	0.38 [math]\pm[/math]0.000757
6.89	75	98	0.26 [math]\pm[/math]0.000488
7.89	91	123	0.25 [math]\pm[/math] 0.000348
8.89	115	141	0.28 [math]\pm[/math] 0.000283
9.89	207	254	0.28 [math]\pm[/math] 0.000117
10.89	212	300	0.24 [math]\pm[/math]0.000092
11.89	284	413	0.24 [math]\pm[/math]0.000057
12.89	322	501	0.22 [math]\pm[/math] 0.000043
13.89	359	521	0.24 [math]\pm[/math] 0.000040
14.89	365	565	0.22 [math]\pm[/math] 0.000036
15.89	415	523	0.27 [math]\pm[/math]0.000040
16.89	444	526	0.29 [math]\pm[/math] 0.000039
17.89	405	555	0.25 [math]\pm[/math] 0.000036
18.89	414	528	0.27 [math]\pm[/math] 0.000039
19.89	387	502	0.27 [math]\pm[/math] 0.000042
20.89	408	505	0.28 [math]\pm[/math] 0.000042
21.89	352	457	0.27 [math]\pm[/math] 0.000048
22.89	298	358	0.29 [math]\pm[/math] 0.000070
23.89	522	547	0.33 [math]\pm[/math] 0.000038
24.89	530	608	0.3 [math]\pm[/math] 0.000032
25.89	571	590	0.33 [math]\pm[/math] 0.000034
26.89	523	564	0.32 [math]\pm[/math] 0.000036
27.89	422	440	0.33 [math]\pm[/math] 0.000052
28.89	368	342	0.37 [math]\pm[/math] 0.000079
29.89	101	108	0.32 [math]\pm[/math] 0.000427

• 2.) ND3Bp/NH3Bn

Pion Paddle Number	Number of Events ND3Bp	Number of Events NH3Bn	Ratio(ND3Bp/NH3Bn) [math]\pm[/math] error
0.91	45	89	1.29 [math]\pm[/math]0.004556
1.91	86	127	1.73[math]\pm[/math] 0.002488
2.91	82	133	1.58[math]\pm[/math] 0.002361
3.91	91	330	0.71 [math]\pm[/math]0.000822
4.91	94	348	0.69 [math]\pm[/math]0.000766
5.91	125	360	0.89 [math]\pm[/math]0.000649
6.91	120	399	0.77 [math]\pm[/math]0.000594
7.91	148	443	0.86 [math]\pm[/math]0.000484
8.91	128	387	0.85 [math]\pm[/math]0.000595
9.91	121	510	0.61 [math]\pm[/math]0.000459
10.91	104	417	0.64 [math]\pm[/math]0.000607
11.91	145	449	0.83 [math]\pm[/math]0.000481
12.91	108	469	0.59 [math]\pm[/math]0.000528
13.91	113	449	0.64 [math]\pm[/math]0.000541
14.91	104	401	0.66 [math]\pm[/math]0.000631
15.91	98	427	0.59 [math]\pm[/math]0.000609
16.91	100	335	0.76 [math]\pm[/math]0.000774
17.91	70	316	0.57 [math]\pm[/math]0.000973
18.91	65	269	0.62 [math]\pm[/math]0.001189
19.91	56	270	0.53 [math]\pm[/math]0.001273
20.91	37	200	0.47 [math]\pm[/math]0.002111
21.91	27	149	0.46 [math]\pm[/math]0.003316
22.91	28	99	0.72[math]\pm[/math] 0.004942
23.91	32	112	0.73 [math]\pm[/math]0.004087
24.91	42	103	1.04[math]\pm[/math] 0.003963
25.91	25	70	0.91 [math]\pm[/math]0.007479
26.91	24	66	0.93 [math]\pm[/math]0.008105
27.91	27	39	1.77 [math]\pm[/math]0.014578
28.91	24	48	1.28 [math]\pm[/math]0.011546

W

Q^2

W

Q^2