oss section D AA 30-50% centrality Open Heavy Flavourgrell101/HFDmesonsRAA_JanQMApproval.… ·...

What about RHIC results

Disagreement STAR-PHENIX factor 2 in cross section measurement.

Data in agreement with binary scaling - negligible initial state nuclear effects.

Charm with non photonic electrons.

High suppression of charm, at the level of light quark. Predictions

contradicted!.

EPS2009 - Krakow Alessandro Grelli 8 03/12/09 - Pavia Alessandro Grelli 8

D meson RAA in Pb-Pb, 30-50% centrality

Alessandro Grellifor the D2H group

Open Heavy Flavour at LHC with

ALICE detector

03/12/09 - Pavia Alessandro Grelli

The jet-alignment method

for event mixing

Alessandro Grelli!

ERC-Starting Independent Research Group QGP17/1/2017 Grelli Alessandro






contradicted!.


Outline

Dataset and analysis setup Signal and efficiencies Systematics:

Cut variation yield extraction PID and pT shape η positive vs η negative, low vs high interaction rate Tracking Eloss and feed down

D meson yields RAA vs pT (D0,D+,D*+ and D+s) D meson ratios Conclusions

ARC committee: Cristina Bedda, Philippe Crochet

Analysis Note uploaded here:https://aliceinfo.cern.ch/Notes/node/576

17/1/2017 Grelli Alessandro 1

https://aliceinfo.cern.ch/Notes/node/576






contradicted!.


Outline

Dataset and analysis setup Signal and efficiencies Systematics:

Cut variation (additional sets for D*+) yield extraction PID and pT shape (D*+ finalized) η positive vs η negative, low vs high interaction rate Tracking (additional checks wrt last week ) Eloss and feed down

D meson yields RAA vs pT (D0,D+,D*+ and D+s) D meson ratios Conclusions

ARC committee: Cristina Bedda, Philippe Crochet

Analysis Note uploaded here:https://aliceinfo.cern.ch/Notes/node/576


https://aliceinfo.cern.ch/Notes/node/576






contradicted!.


Analysis setup

Data analysis: LHC15o_pass1 (RunList_LHC15o_pass1_CentralBarrelTracking_hadronPID_20161130_v6)

LHC15o_pass1_pidfix (RunList_LHC15o_pass1_pidfix_Tracklets_20161018_v0)

LHC15o_pass3_lowIR_pidfix (RunList_LHC15o_pass3_lowIR_pidfix_CentralBarrelTracking_hadronPID_20161109_v0)

MC for 2015: LHC16i2b

~24M minimum-bias events analysed (kINT7)

Analysis strategy similar to the one for 2010 RAA paper

pp reference: D-meson pp pass4 analysis (paper plans to be out by QM)

→Results from LEGO train







contradicted!.


Signal extraction, comparison with MC and efficiencies

Mass plots D0

)2) (GeV/cπInvariant Mass (K1.75 1.8 1.85 1.9 1.95 2

2En

trie

s / 4

MeV

/c

0

500

1000

1500

2000

2500

3000

3500

4000

4500 0.001±Mean = 1.866

0.002±Sigma = 0.011 0.000±ReflOverS = 0.231

1.2 ±) 9.3 σSignificance (3

273 ±) 2043 σS (3

87±) 46267 σB (3

) 0.0442 σS/B (3

<2.0T

1.0<p


2En

trie

s / 1

2 M

eV/c

0

2000

4000

6000

8000

10000

12000 0.001±Mean = 1.869

0.001±Sigma = 0.013 0.000±ReflOverS = 0.230


306 ±) 5966 σS (3

100±) 53733 σB (3

) 0.1110 σS/B (3

<3.0T

2.0<p

)2) (GeV/cπInvariant Mass (K1.75 1.8 1.85 1.9 1.95 2 2.05

2En

trie

s / 1

0 M

eV/c

0

500

1000

1500

2000

2500

3000

3500 0.000±Mean = 1.868

0.000±Sigma = 0.014 0.000±ReflOverS = 0.231


152 ±) 4762 σS (3

57±) 16298 σB (3

) 0.2922 σS/B (3

<4.0T

3.0<p


2En

trie

s / 1

2 M

eV/c

0

200

400

600

800

1000

1200

1400

1600

1800

2000

2200 0.001±Mean = 1.868

0.001±Sigma = 0.016 0.000±ReflOverS = 0.207


116 ±) 3433 σS (3

45±) 8665 σB (3

) 0.3962 σS/B (3

<5.0T

4.0<p


2En

trie

s / 1

0 M

eV/c

0

100

200

300

400

500

600

700

800

900 0.001±Mean = 1.868

0.001±Sigma = 0.017

0.000±ReflOverS = 0.188


78 ±) 2172 σS (3

28±) 3383 σB (3

) 0.6419 σS/B (3

<6.0T

5.0<p


2En

trie

s / 6

MeV

/c

0

50

100

150

200

250

300

350

400 0.001±Mean = 1.868

0.001±Sigma = 0.018

0.000±ReflOverS = 0.178


69 ±) 1627 σS (3

25±) 2405 σB (3

) 0.6766 σS/B (3

<7.0T

6.0<p


2En

trie

s / 1

2 M

eV/c

0

50

100

150

200

250

300

350 0.001±Mean = 1.868

0.001±Sigma = 0.018

0.000±ReflOverS = 0.165


45 ±) 908 σS (3

14±) 867 σB (3

) 1.0474 σS/B (3

<8.0T

7.0<p


2En

trie

s / 1

2 M

eV/c

0

100

200

300

400

500

600 0.001±Mean = 1.870

0.001±Sigma = 0.018

0.000±ReflOverS = 0.160


58 ±) 1334 σS (3

20±) 1554 σB (3

) 0.8588 σS/B (3

<10.0T

8.0<p


2En

trie

s / 1

4 M

eV/c

0

20

40

60

80

100

120

140

160

180 0.001±Mean = 1.867

0.001±Sigma = 0.018

0.000±ReflOverS = 0.161


28 ±) 485 σS (3

8±) 275 σB (3

) 1.7633 σS/B (3

<12.0T

10.0<p


2En

trie

s / 1

4 M

eV/c

0

20

40

60

80

100

120

140 0.002±Mean = 1.866

0.002±Sigma = 0.022

0.000±ReflOverS = 0.150


30 ±) 397 σS (3

10±) 330 σB (3

) 1.2024 σS/B (3

<16.0T

12.0<p

)2) (GeV/cπInvariant Mass (K1.7 1.8 1.9 2 2.1

2En

trie

s / 1

6 M

eV/c

0

10

20

30

40

50

60

70

80 0.003±Mean = 1.872

0.003±Sigma = 0.022

0.000±ReflOverS = 0.222


20 ±) 185 σS (3

8±) 169 σB (3

) 1.0977 σS/B (3

<24.0T

16.0<p

)2) (GeV/cπInvariant Mass (K1.7 1.75 1.8 1.85 1.9 1.95 2

2En

trie

s / 2

6 M

eV/c

0

5

10

15

20

25

30

35

40

45 0.005±Mean = 1.860

0.004±Sigma = 0.023

0.000±ReflOverS = 0.267


12 ±) 57 σS (3

5±) 59 σB (3

) 0.9701 σS/B (3

<36.0T

24.0<p

1-2

24-36






contradicted!.


2-3 3-4 4-5

6-7 7-8 8-10

10-12 12-16 16-24

5-6







contradicted!.


Mass plots D+

)2 (GeV/cππKM

1.8 1.85 1.9 1.95 2

)2En

tries

/ (8

MeV

/c

0200400600800

10001200140016001800200022002400

< 3.0 (GeV/c)Tp2.0 <

0.001±Mean = 1.869 0.001±Sigma = 0.011

1.1 ±) 10.2 σSignificance (3 151 ±) 1385 σS (3

61±) 16875 σB (3) 0.0820 σS/B (3

)2 (GeV/cππKM

1.75 1.8 1.85 1.9 1.95 2)2

Entri

es /

(10

MeV

/c0

200400600800

1000120014001600180020002200

< 4.0 (GeV/c)Tp3.0 <

0.001±Mean = 1.871 0.001±Sigma = 0.013


52±) 11260 σB (3) 0.1879 σS/B (3

)2 (GeV/cππKM

1.75 1.8 1.85 1.9 1.95 2

)2En

tries

/ (1

0 M

eV/c

0200400600800

10001200140016001800

< 5.0 (GeV/c)Tp4.0 <

0.001±Mean = 1.872 0.001±Sigma = 0.012

1.0 ±) 19.5 σSignificance (3 118 ±) 2022 σS (3 45±) 8727 σB (3

) 0.2317 σS/B (3

)2 (GeV/cππKM

1.75 1.8 1.85 1.9 1.95 2

)2En

tries

/ (1

0 M

eV/c

0

200

400

600

800

1000 < 6.0 (GeV/c)

Tp5.0 <

0.001±Mean = 1.871 0.001±Sigma = 0.014


) 0.2914 σS/B (3

)2 (GeV/cππKM

1.75 1.8 1.85 1.9 1.95 2

)2En

tries

/ (1

0 M

eV/c

0

100

200

300

400

500

600

700

800 < 7.0 (GeV/c)

Tp6.0 <

0.001±Mean = 1.871 0.001±Sigma = 0.013


) 0.3481 σS/B (3

)2 (GeV/cππKM

1.75 1.8 1.85 1.9 1.95 2

)2En

tries

/ (1

2 M

eV/c

0

100

200

300

400

500

600 < 8.0 (GeV/c)

Tp7.0 <

0.001±Mean = 1.871 0.001±Sigma = 0.016


) 0.4124 σS/B (3

)2 (GeV/cππKM

1.75 1.8 1.85 1.9 1.95 2

)2En

tries

/ (1

2 M

eV/c

0

100

200

300

400

500

600

700 < 10.0 (GeV/c)

Tp8.0 <

0.001±Mean = 1.871 0.001±Sigma = 0.015


) 0.4511 σS/B (3

)2 (GeV/cππKM

1.7 1.75 1.8 1.85 1.9 1.95 2

)2En

tries

/ (1

6 M

eV/c

0

100

200

300

400

500 < 12.0 (GeV/c)

Tp10.0 <

0.001±Mean = 1.870 0.001±Sigma = 0.015


) 0.6112 σS/B (3

)2 (GeV/cππKM

1.7 1.75 1.8 1.85 1.9 1.95 2

)2En

tries

/ (1

6 M

eV/c

0

50

100

150

200

250

300

350

400

< 16.0 (GeV/c)Tp12.0 <

0.001±Mean = 1.870 0.001±Sigma = 0.017


) 0.7765 σS/B (3

)2 (GeV/cππKM

1.7 1.75 1.8 1.85 1.9 1.95 2

)2En

tries

/ (1

6 M

eV/c

020406080

100120140160180200

< 24.0 (GeV/c)Tp16.0 <

0.002±Mean = 1.871 0.002±Sigma = 0.021


) 0.8177 σS/B (3

)2 (GeV/cππKM

1.75 1.8 1.85 1.9 1.95 2

)2En

tries

/ (2

0 M

eV/c

0

10

20

30

40

50

60

70 < 36.0 (GeV/c)

Tp24.0 <

0.003±Mean = 1.869 0.003±Sigma = 0.018


7±) 136 σB (3) 0.6859 σS/B (3

2-3

24-36

3-4 4-5 5-6

6-7 7-8 8-10 10-12

12-16 16-24







contradicted!.


Mass plots D*+

0.14 0.142 0.144 0.146 0.148 0.15 0.152 0.1540

100

200

300

400

500

0.000 Mean = 0.145 0.000 Sigma = 0.001

1.0 ) 3.2 Significance (3 49 ) 150 S (3 13 ) 2047 B (3

) 0.0734 S/B (3

< 2 (GeV/cT

1 < p

0.14 0.142 0.144 0.146 0.148 0.15 0.152 0.1540

100

200

300

400

500

600

700

800

900

0.000 Mean = 0.145 0.000 Sigma = 0.000

1.0 ) 4.6 Significance (3 57 ) 240 S (3 12 ) 2537 B (3

) 0.0945 S/B (3

< 3 (GeV/c)T

2 < p

0.14 0.142 0.144 0.146 0.148 0.15 0.152 0.1540

200

400

600

800

1000

1200

1400

1600

1800

0.000 Mean = 0.145 0.000 Sigma = 0.001

1.2 ) 7.8 Significance (3 102 ) 648 S (3

21 ) 6226 B (3) 0.1041 S/B (3

< 4 (GeV/cT

3 < p

0.14 0.142 0.144 0.146 0.148 0.15 0.152 0.1540

20

40

60

80

100

120

140

160

180

200

220

240

0.000 Mean = 0.145 0.000 Sigma = 0.001

1.1 ) 11.7 Significance (3 48 ) 443 S (3 8 ) 994 B (3

) 0.4457 S/B (3

< 5 ( GeV/cT

4 < p

0.14 0.142 0.144 0.146 0.148 0.15 0.152 0.1540

20

40

60

80

100

120

140

160

0.000 Mean = 0.145 0.000 Sigma = 0.001

0.9 ) 11.3 Significance (3 30 ) 313 S (3 6 ) 458 B (3

) 0.6820 S/B (3

< 6 (GeV/cT

5 < p

0.14 0.142 0.144 0.146 0.148 0.15 0.152 0.1540

20

40

60

80

100

120

140

0.000 Mean = 0.145 0.000 Sigma = 0.001

0.8 ) 12.0 Significance (3 28 ) 311 S (3 5 ) 361 B (3

) 0.8619 S/B (3

< 7 (GeV/cT

6 < p

0.14 0.142 0.144 0.146 0.148 0.15 0.152 0.1540

10

20

30

40

50

60

70

80

90 0.000 Mean = 0.145 0.000 Sigma = 0.001

0.9 ) 10.4 Significance (3 24 ) 215 S (3 4 ) 210 B (3

) 1.0202 S/B (3

< 8 (GeV/cT

7 < p

0.14 0.142 0.144 0.146 0.148 0.15 0.152 0.1540

20

40

60

80

100

120

0.000 Mean = 0.145 0.000 Sigma = 0.001

0.8 ) 14.2 Significance (3 27 ) 358 S (3 4 ) 275 B (3

) 1.2988 S/B (3

< 10 (GeV/cT

8 < p

0.14 0.142 0.144 0.146 0.148 0.15 0.152 0.1540

10

20

30

40

50

60

70 0.000 Mean = 0.146 0.000 Sigma = 0.001

0.7 ) 12.1 Significance (3 18 ) 204 S (3 2 ) 80 B (3

) 2.5349 S/B (3

< 12 (GeV/cT

10 < p

0.14 0.142 0.144 0.146 0.148 0.15 0.152 0.1540

10

20

30

40

50

60

70

0.000 Mean = 0.145 0.000 Sigma = 0.001

0.7 ) 11.1 Significance (3 15 ) 162 S (3 2 ) 49 B (3

) 3.3070 S/B (3

< 16 (GeV/cT

12 < p

0.14 0.142 0.144 0.146 0.148 0.15 0.152 0.1540

2

4

6

8

10

12

14

16

18

2022

24

0.000 Mean = 0.146 0.000 Sigma = 0.001

0.7 ) 7.2 Significance (3 10 ) 68 S (3 2 ) 22 B (3

) 3.0814 S/B (3

16 < pT < 24 (GeV/c

0.14 0.142 0.144 0.146 0.148 0.15 0.152 0.1540

5

10

15

20

25

0.000 Mean = 0.145 0.000 Sigma = 0.001

0.6 ) 7.9 Significance (3 10 ) 70 S (3 1 ) 9 B (3

) 8.0544 S/B (3

< 36 (GeV/c)T

24 < p

1-2

24-36

2-3 3-4

4-5 5-6 6-7

7-8 8-10 10-12

12-16 16-24







contradicted!.


Mass plots Ds

)2) (GeV/c M(KK1.8 1.9 2 2.1

2En

tries

/ 13

MeV

/c

20406080

100120140160180

c<4 GeV/T

p2<

2 0.003 GeV/c = 1.969 2 0.000 GeV/c = 0.010

17 S = 79 6 ) = 259 B (3

) 0.3061 S/B = (3 0.8 ) = 4.3 Signif (3

)2) (GeV/c M(KK1.8 1.9 2 2.1

2En

tries

/ 13

MeV

/c0

50

100

150

200

250

c<6 GeV/Tp4<

2 0.003 GeV/c = 1.970 2 0.000 GeV/c = 0.011

20 S = 127 8 ) = 355 B (3

) 0.3574 S/B = (3 0.8 ) = 5.8 Signif (3

)2) (GeV/c M(KK1.8 1.9 2 2.1

2En

tries

/ 15

MeV

/c

50

100

150

200

250

300

c<8 GeV/Tp6<

2 0.002 GeV/c = 1.966 2 0.000 GeV/c = 0.012

24 S = 150 11 ) = 581 B (3

) 0.2591 S/B = (3 0.8 ) = 5.6 Signif (3

)2) (GeV/c M(KK1.8 1.9 2 2.1

2En

tries

/ 13

MeV

/c

0

20

40

60

80

100

120 c<12 GeV/Tp8<

2 0.002 GeV/c = 1.968 2 0.000 GeV/c = 0.013

16 S = 136 6 ) = 152 B (3

) 0.8966 S/B = (3 0.7 ) = 8.0 Signif (3

)2) (GeV/c M(KK1.8 1.9 2 2.1

2En

tries

/ 15

MeV

/c

10

20

30

40

50 c<16 GeV/Tp12<

2 0.003 GeV/c = 1.969 2 0.000 GeV/c = 0.015

10 S = 58 3 ) = 37 B (3

) 1.5657 S/B = (3 0.7 ) = 5.9 Signif (3

2-4

12-16

4-6 6-8

8-12


Width: comparison data-MC

Pt (GeV/c)5 10 15 20 25 30 35

)2

Sig

ma (

GeV

/c

0.0002

0.0004

0.0006

0.0008

0.001

0.0012

0.0014

Data

MC

)c (GeV/T

p5 10 15 20 25 30 35

Sigm

a

0

0.01

0.02

0.03

0.04MC

data

(GeV/c)Tp

5 10 15 20 25 30 35

)2w

idth

(GeV

/c

68

101214161820222426

3−10×

Data

MC

)2Sigma (GeV/c2 4 6 8 10 12 14 16

)2Si

gma

(GeV

/C

0.004

0.006

0.008

0.01

0.012

0.014

0.016

0.018

0.02

Peak width

FreeMC+15%MC

Peak width

)2Mass (GeV/c2 4 6 8 10 12 14 16

)2M

ean

(GeV

/C

1.962

1.964

1.966

1.968

1.97

1.972

1.974

1.976

Peak position

DataMCPDG

Peak position

D0 D+

D*+ Ds

Plots with position in data and MC in backup!






contradicted!.

EPS2009 - Krakow Alessandro Grelli 8 03/12/09 - Pavia Alessandro Grelli 817/1/2017 Grelli Alessandro 7

Efficiencies

5 10 15 20 25 30 35

Effic

ienc

y

2−10

1−10

0Prompt D

0Feed-down D

)c (GeV/Tp

5 10 15 20 25 30 35

Rat

io

0.20.40.60.811.21.41.61.822.22.4

(GeV/c)Tp

5 10 15 20 25 30 35fid

effic

ienc

y x

acce

ptan

ce x

2y

2−10

1−10

+Prompt D (w/o PID)+Prompt D

+Feed-down D

Pt (GeV/c)5 10 15 20 25 30 35

Effic

ienc

y x

Acce

ptan

ce

4 10

3 10

2 10

1 10

1

PromptFeed-down






contradicted!.


D+D0

D*+

Efficiencies range from 0.1 to 60% depending on pT

and meson

Results “reasonably” smooth versus pT. Remember we use pT dependent topological cuts!

pt2 4 6 8 10 12 14 16

3 10

2 10

1 10

(PID)sPrompt D

(PID)sFeed-down D

Ds







contradicted!.


Systematics

Cut variation

Pt (GeV/c)5 10 15 20 25 30 35

cros

s se

ctio

n ra

tio0.2

0.4

0.6

0.8

1

1.2

1.4

1.6

1.8

2loose 5%tight 5%loose 10%tight 10%loose 15%tight 15%loose 20%tight 20%

5 10 15 20 25 30 35

Raa

_ref

.Nb

0

0.5

1 centrallosser1losser2tighter1tighter2

)c (GeV/Tp

5 10 15 20 25 30 35

Rat

io

0.70.80.9

11.11.21.31.4

D0 and D*+ as example, D+ and Ds results in the Analysis note!.

We vary our cuts of 20% with respect the standard set in both directions and in steps of 5%. For each step we check the agreement of our final results

Typically 0-10% depending on pT

D0






contradicted!.


Pt (GeV/c)5 10 15 20 25 30 35

prom

pt ra

tio

0.2

0.4

0.6

0.8

1

1.2

1.4

1.6

1.8

2tight 5%loose 5%tight 10%loose 10%tight 15%loose 15%tight 20%loose 20%

step9 projection pt projection pt

D*+

efficiency variation

dN/dpT ratio in Pb-Pb







contradicted!.


Yield extraction

Trial #0 200 400 600 800 1000 1200 1400 1600

raw

yie

ld

800100012001400160018002000220024002600

< 3 (GeV/c)Tp2 <

Central valueFit method

)σBin counting (5.0)σBin counting (3.0

< 3 (GeV/c)Tp2 <

raw yield1000 1200 1400 1600 1800 2000

Entri

es

0

50

100

150

200

250

300

< 3 (GeV/c)Tp2 <

mean = 1324.8RMS = 74.6 (5.4%)

= 122.6 (8.8%)12

max-min

mean = 1444.9RMS = 100.3 (7.2%)

= 173.1 (12.5%)12

max-min

mean = 1397.7RMS = 84.0 (6.1%)

= 144.3 (10.4%)12

max-min

< 3 (GeV/c)Tp2 <

Trial #0 200 400 600 800 1000 1200 1400 1600

)2w

idth

(GeV

/c

0.006

0.008

0.01

0.012

0.014

0.016

< 3 (GeV/c)Tp2 < < 3 (GeV/c)

Tp2 <

Trial #0 200 400 600 800 1000 1200 1400 1600

2 χ

00.20.40.60.8

11.21.41.61.8

2 < 3 (GeV/c)

Tp2 < < 3 (GeV/c)

Tp2 <

Trial #0 200 400 600 800 1000 1200 1400 1600

raw

yie

ld

1500

2000

2500

3000

3500

4000 < 4 (GeV/c)

Tp3 <



< 4 (GeV/c)Tp3 <

raw yield1400 1600 1800 2000 2200 2400 2600 2800 3000

Entri

es

0

50

100

150

200

250

300

< 4 (GeV/c)Tp3 <

mean = 1947.4RMS = 127.7 (6.0%)

= 209.5 (9.9%)12

max-min

mean = 2116.3RMS = 177.3 (8.4%)

= 264.6 (12.5%)12

max-min

mean = 2042.3RMS = 121.9 (5.7%)

= 220.5 (10.4%)12

max-min

< 4 (GeV/c)Tp3 <

Trial #0 200 400 600 800 1000 1200 1400 1600

)2w

idth

(GeV

/c

0.008

0.01

0.012

0.014

0.016

0.018

< 4 (GeV/c)Tp3 < < 4 (GeV/c)

Tp3 <

Trial #0 200 400 600 800 1000 1200 1400 1600

2 χ

00.20.40.60.8

11.21.41.61.8

2 < 4 (GeV/c)

Tp3 < < 4 (GeV/c)

Tp3 <

Trial #0 200 400 600 800 1000 1200 1400 1600

raw

yie

ld

1000

1500

2000

2500

3000

3500

< 5 (GeV/c)Tp4 <



< 5 (GeV/c)Tp4 <

raw yield1400 1600 1800 2000 2200 2400 2600 2800 3000

Entri

es

0

50

100

150

200

250

300

350

< 5 (GeV/c)Tp4 <

mean = 1920.1RMS = 104.1 (5.1%)

= 168.6 (8.3%)12

max-min

mean = 2070.7RMS = 166.7 (8.2%)

= 242.3 (12.0%)12

max-min

mean = 1991.7RMS = 120.3 (5.9%)

= 189.7 (9.4%)12

max-min

< 5 (GeV/c)Tp4 <

Trial #0 200 400 600 800 1000 1200 1400 1600

)2w

idth

(GeV

/c

0.008

0.01

0.012

0.014

0.016

0.018 < 5 (GeV/c)

Tp4 < < 5 (GeV/c)

Tp4 <

Trial #0 200 400 600 800 1000 1200 1400 1600

2χ

00.20.40.60.8

11.21.41.61.8

2 < 5 (GeV/c)

Tp4 < < 5 (GeV/c)

Tp4 <

Trial #0 200 400 600 800 1000 1200 1400 1600

raw

yie

ld

8001000120014001600180020002200240026002800

< 6 (GeV/c)Tp5 <



< 6 (GeV/c)Tp5 <

raw yield1000 1200 1400 1600 1800 2000 2200

Entri

es

0

50

100

150

200

250

300

350

400

< 6 (GeV/c)Tp5 <

mean = 1384.0RMS = 71.7 (4.8%)

= 115.4 (7.8%)12

max-min

mean = 1511.9RMS = 123.9 (8.4%)

= 169.2 (11.4%)12

max-min

mean = 1405.0RMS = 86.5 (5.8%)

= 146.2 (9.9%)12

max-min

< 6 (GeV/c)Tp5 <

Trial #0 200 400 600 800 1000 1200 1400 1600

)2w

idth

(GeV

/c

0.008

0.01

0.012

0.014

0.016

0.018

0.02

< 6 (GeV/c)Tp5 < < 6 (GeV/c)

Tp5 <

Trial #0 200 400 600 800 1000 1200 1400 1600

2 χ

00.20.40.60.8

11.21.41.61.8

2 < 6 (GeV/c)

Tp5 < < 6 (GeV/c)

Tp5 <

Trial #0 200 400 600 800 1000 1200 1400 1600

raw

yie

ld

600

800

1000

1200

1400

1600

< 8 (GeV/c)Tp7 <



< 8 (GeV/c)Tp7 <

raw yield600 700 800 900 1000 1100 1200 1300

Entri

es

0

100

200

300

400

500

< 8 (GeV/c)Tp7 <

mean = 872.7RMS = 56.4 (6.3%)

= 69.5 (7.8%)12

max-min

mean = 872.9RMS = 43.8 (4.9%)

= 74.2 (8.3%)12

max-min

mean = 911.7RMS = 33.0 (3.7%)

= 51.0 (5.7%)12

max-min

< 8 (GeV/c)Tp7 <

Trial #0 200 400 600 800 1000 1200 1400 1600

)2w

idth

(GeV

/c

0.008

0.01

0.012

0.014

0.016

0.018

0.02

0.022

< 8 (GeV/c)Tp7 < < 8 (GeV/c)

Tp7 <

Trial #0 200 400 600 800 1000 1200 1400 1600

2 χ

00.20.40.60.8

11.21.41.61.8

2 < 8 (GeV/c)

Tp7 < < 8 (GeV/c)

Tp7 <

Trial #0 200 400 600 800 1000 1200 1400 1600

raw

yie

ld

600

800

1000

1200

1400

1600

1800

2000

2200 < 7 (GeV/c)

Tp6 <



< 7 (GeV/c)Tp6 <

raw yield800 1000 1200 1400 1600

Entri

es

0

100

200

300

400

500

600

700

800

< 7 (GeV/c)Tp6 <

mean = 1114.3RMS = 27.5 (2.4%)

= 65.0 (5.7%)12

max-min

mean = 1151.4RMS = 47.8 (4.2%)

= 82.8 (7.3%)12

max-min

mean = 1134.3RMS = 34.8 (3.1%)

= 71.0 (6.2%)12

max-min

< 7 (GeV/c)Tp6 <

Trial #0 200 400 600 800 1000 1200 1400 1600

)2w

idth

(GeV

/c

0.008

0.01

0.012

0.014

0.016

0.018

< 7 (GeV/c)Tp6 < < 7 (GeV/c)

Tp6 <

Trial #0 200 400 600 800 1000 1200 1400 1600

2 χ

00.20.40.60.8

11.21.41.61.8

2 < 7 (GeV/c)

Tp6 < < 7 (GeV/c)

Tp6 <

D+

Multi trial fit procedure: different bin widths different fit ranges different background shapes free width parameters fixed width parameters to MC values fixed mean parameters to MC values fit rejected if chi2/ndf>2uncertainty evaluated as rms of raw yield distributionscentral value of the raw yield compatible with mean of yielddistributions within uncertainty-> no shift bin counting signal extraction

Typically 2-20% depending on meson and pT

https://indico.cern.ch/event/597358/contributions/2417713/attachments/1393183/2122972/PF_170110.pdf

For more details see the PF presentation:









contradicted!.


PID systematic

(GeV/c)Tp

5 10 15 20 25 30 35

(w/o

PID

)TpddN

(with

PID

) /

TpddN

0.85

0.90

0.95

1.00

1.05

1.10

1.15

1.20

)c (GeV/T

p5 10 15 20 25 30 35

PID

/ no

PID

0.5

1

1.5PID efficiency from Data

PID efficiency from MC

pt (GeV/c)5 10 15 20 25 30

Eff_

data

/Eff_

MC

0.6

0.7

0.8

0.9

1

1.1

1.2

1.3

1.4

PID syst: Data/MC

from fit: 0.9994

D0

D*+

D+

Using 3 sigma strategy in TOF and TPC. For Ds the number of sigmas in TOF is reduced to 2.

Comparison of the corrected yield without and with PID or of the PID efficiencies in data and MC (D*+)

Negligible in the whole pT range







contradicted!.


pT-shape

pt5 10 15 20 25 30 35 40 45 500.9

0.92

0.94

0.96

0.98

1

1.02

1.04

1.06

1.08

1.1

RecoPID: projection on pt

D*+

D*+ and D0 as example.

Evaluated as the ratio of the shapes obtained re-weighting pithya by using BAMPSxFONLL and FONLL

Typically extremely small, of the order of 0-1% above 3 Gev/c but non negligible at low pT: 5-10% below 3 GeV/c, depending on the meson

5 10 15 20 25 30 35

Prom

pt e

ffici

ency

2−10

1−10

FONLL+BAMPS weight(default)

FONLL weight

)c (GeV/Tp

5 10 15 20 25 30 35

Rat

io

0.981

1.021.041.061.08

1.11.121.141.161.18

D0







contradicted!.


η positive vs η negativepositive and negative eta check

Xinye D2H meeting 1

5 10 15 20 25 30 35

Raa

_ref

.Nb

0

0.5

1central

negative eta

postive eta

)c (GeV/Tp

5 10 15 20 25 30 35

Rat

io

0.20.40.60.8

11.21.41.61.8

fix the sigma to MC


2E

ntr

ies

/ 4

Me

V/c

0

200

400

600

800

1000 0.003±Mean = 1.864 0.000±Sigma = 0.012

0.000±ReflOverS = 0.237


41±) 9842 σB (3) 0.0477 σS/B (3

<2.0T

1.0<p

negative eta

positive and negative eta check

Xinye D2H meeting 1

5 10 15 20 25 30 35

Raa

_ref

.Nb

0

0.5

1central

negative eta

postive eta

)c (GeV/Tp

5 10 15 20 25 30 35

Rat

io

0.20.40.60.8

11.21.41.61.8

fix the sigma to MC


2E

ntr

ies / 4

MeV

/c

0

200

400

600

800

1000 0.003±Mean = 1.864 0.000±Sigma = 0.012

0.000±ReflOverS = 0.237


41±) 9842 σB (3) 0.0477 σS/B (3

<2.0T

1.0<p

negative eta

We repeated the D0 analysis (the one among D analyses with the highest statistical precision) splitting it in positive and negative η. The comparison with respect the full η analysis does not show any “visible” effect.

Some tension in the bin 1-2 but most probaly is a statistical fluctuation

D0







contradicted!.


Low vs high interaction rate

We checked the results vs the high and low interaction rate runs.

The final RAA in all the 3 cases looks well compatible. Some fluctuation at high pT but it may well be due to the very large stastistical error

low or high interaction rate check

Xinye D2H meeting 3

5 10 15 20 25 30 35

Raa

_ref

.Nb

0.5

1central(24.6M normalized events)

low interaction rate(10.9M normalized events)

high interaction rate(13.4M normalized events)

)c (GeV/Tp

5 10 15 20 25 30 35R

atio

0.80.9

11.11.2

fix the sigma to MC

5 10 15 20 25 30 35

Prom

pt e

ffici

ency

2−10

1−10

mixed allhigh ratelow rate

)c (GeV/Tp

5 10 15 20 25 30 35

Rat

io

0.940.960.98

11.021.041.06

D0

low or high interaction rate check

Xinye D2H meeting 4

5 10 15 20 25 30 35

sign

al/e

nv

5−10

4−10

central

low rate runs

high rate runs

)c (GeV/Tp

5 10 15 20 25 30 35

Rat

io

0.60.70.80.9

11.11.21.31.41.5 5 10 15 20 25 30 35

Back

grou

nd/e

nv

5−10

4−10

3−10

central

low rate runs

high rate runs

)c (GeV/Tp

5 10 15 20 25 30 35R

atio

0.60.70.80.9

11.11.21.31.41.5

raw signal vs pT RAA vs pT







contradicted!.


Tracking systematic (additional checks)


The method to estimate the systematic on tracking for the D meson analyses was explained in detail at the last forum


track efficiency check

Xinye D2H meeting 2

5 10 15 20 25 30 35

Raa

_ref

.Nb

0

0.5

1central

Crossed rows/findable cls = 0.9

-depT

Crossed row TPC p

TPC cls/crossed rows = 0.65

)c (GeV/Tp

5 10 15 20 25 30 35

Rat

io

0.960.98

11.021.041.06 5 10 15 20 25 30 35

Raa

_ref

.Nb

0

0.5

1centralCrossed rows/findable cls = 0.9

-dep T

pCrossed row TPC TPC cls/crossed rows = 0.65

)c (GeV/Tp

5 10 15 20 25 30 35

Rat

io

0.970.980.99

11.011.021.031.04

fix the sigma to MC

~1% per track is OK

three variations: 1. stdcuts +TPC crossed rows > 120 - (5/pT) 2. stdcuts +TPC N clusters > 0.5 * TPC crossed rows 3. stdcuts +TPC crossed rows/TPC findable clusters > 0.9

Additional checks, on the variation of the track quality selections, were performed in the last week. The checks confirmed a ~1% per track from this source, to be added to the ITS-TPC matching efficiency.

D0







contradicted!.


Feed down systD meson nuclear modification factor in Pb–Pb collisions at

psNN = 5.02 TeV in 30- . . . 47

prompt)AAR feed-down)/(AARHypothesis on (1 1.2 1.4 1.6 1.8 2 2.2 2.4 2.6 2.8 3

pro

mpt

(%)

AAR

Rel

ativ

e va

riatio

n of

20−

15−

10−

5−

0

5

10

15

20

c<3 GeV/Tp2<

c<4 GeV/Tp3<

c<6 GeV/Tp5<

c<8 GeV/Tp7<

c<16 GeV/Tp12<

c<24 GeV/Tp16<

ALICE = 5.02 TeVNNsPb-Pb, 30-50%,

meson+D


pro

mpt

(%)

AAR

Rel

ativ

e va

riatio

n of

20−

15−

10−

5−

0

5

10

15

20

c<3 GeV/Tp2<

c<4 GeV/Tp3<

c<6 GeV/Tp5<

c<8 GeV/Tp7<

c<16 GeV/Tp12<


meson+D

Figure 46: D+: Variation of the R

prompt

AA as a function of the hypothesis on R

feed�downAA /R

promptAA in the varius pT bins.

In the left panel is shown the result obtained applying the default set of topological selections, while in the rightone the cuts on d

xy

0 and |d0 �d

exp

0 |prong(ns) were not applied.

prompt)AAR feed-down)/(AARHypothesis on (

1 1.2 1.4 1.6 1.8 2 2.2 2.4 2.6 2.8 3

pro

mp

t (%

)A

AR

Re

lativ

e v

aria

tion

of

20−

15−

10−

5−

0

5

10

15

20

c<2 GeV/T

p1<c<3 GeV/

Tp2<

c<5 GeV/T

p4<c<7 GeV/

Tp6<

c<12 GeV/T

p10<c<16 GeV/

Tp12<

c<36 GeV/T

p24<


meson0D

Figure 47: D0: Systematic uncertainty from feed-down and R

f eed�down

AA hypothesis in the varius pT bins.

8 D meson corrected yield in Pb–Pb collisions561

Once the invariant mass analysis is performed and the efficiencies and B feed-down studied we can562

correct our raw yield to extract the fully corrected yield in our PbPb sample. In figures 49, 50, and 51563

the corrected yield of D0, D+ and Ds is compared with the proton-proton reference scaled by TAA.564

(GeV/c)T

p2 4 6 8 10 12

0.8

0.85

0.9

0.95

1

1.05

promptf

Feed-down systematics

21

(GeV/c)Tp

5 10 15 20 25 30 35

prom

ptf

0

0.2

0.4

0.6

0.8

1

1.2

)c (GeV/Tp

0 2 4 6 8 10 12 14 16 18 20 22

prom

ptf

0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

D+D0

prompt)AAR feed-down)/(AARHypothesis on (0.5 1 1.5 2 2.5 3

pro

mpt

(%)

AAR

Rel

ativ

e va

riatio

n of

20−

15−

10−

5−

0

5

10

15

20

c<4 GeV/Tp2<

c<6 GeV/Tp4<

c<8 GeV/Tp6<

c<12 GeV/Tp8<


meson+sD

Systematic on RAA in 30-50% vs hypothesis on the B feed-down


pro

mpt

(%)

AAR

Rel

ativ

e va

riatio

n of

20−

15−

10−

5−

0

5

10

15

20

c<3 GeV/Tp2<

c<4 GeV/Tp3<

c<6 GeV/Tp5<

c<8 GeV/Tp7<

c<16 GeV/Tp12<

c<24 GeV/Tp16<


meson+D

1 < Rb/Rc < 3 for non-strange D 1/3 < Rb/Rc < 3 for Ds

prompt fraction

Ds

D+sD+

D0

D0 D+ Ds


D*+

Prompt fraction >80% in the whole pt range.

For non strange D mesons 1<RAAc/RAAb<3 with central value 2. For Ds RAAb = RAAc and 1/3<RAAc/RAAb<3

Prompt fraction


pro

mpt

(%)

AAR

Rel

ativ

e va

riatio

n of

20

15

10

5

0

5

10

15

20

c<2 GeV/Tp1<

c<3 GeV/Tp2<

c<5 GeV/Tp4<

c<7 GeV/Tp6<

c<12 GeV/Tp10<

c<16 GeV/Tp12<

c<36 GeV/Tp24<


meson0D

D0 as example

Typically 5-15% depending on meson and pT






contradicted!.


dN/dpT, RAA and D meson ratios






contradicted!.


D mesons - dN/dpT

)c (GeV/T

p0 5 10 15 20 25 30 35

)c

(1

/Ge

V/

|<0

.5y ||

Tp

/dNd

6−10

5−10

4−10

3−10

2−10

1−10

1

10

Centrality 30-50

p-p rescaled reference

6% norm. unc. not shown)±(

Pb-Pb

Syst. unc. from Data

Syst. unc. from FONLL feed-down corr.

feed-downAARSyst. unc. from

= 5.02 TeVNNs +ALICE D

)c (GeV/T

p0 5 10 15 20 25 30 35

)c

(1

/Ge

V/

|<0

.5y ||

Tp

/dNd

6−10

5−10

4−10

3−10

2−10

1−10

1

10

Centrality 30-50

p-p rescaled reference

6% norm. unc. not shown)±(

Pb-Pb




= 5.02 TeVNNs +sALICE D

)c (GeV/Tp

0 5 10 15 20 25 30 35

)c (1

/GeV

/|<

0.5

y || Tp/d

Nd

6−10

5−10

4−10

3−10

2−10

1−10

1

10

Centrality 30-50

p-p rescaled reference 6% norm. unc. not shown)±(

Pb-Pb




= 5.02 TeVNNs 0ALICE D

Preliminary requests

D mesons pp reference using the scaled pp 7 TeV pass4 results (factor about 2 reduced systematics, extended pT range and improved statistical precision).

D0 D+ D*+

Ds

https://aliceinfo.cern.ch/ArtSubmission/sites/aliceinfo.cern.ch.ArtSubmission/files/draft/cterrevo/2016-Dec-21-paper_draft-Dpp7pass4_20Dec2016.pdf









contradicted!.


D mesons RAA : 30-50%

) c (GeV/Tp

0 5 10 15 20 25 30 35 40

pro

mpt

DAA

R

0

0.2

0.4

0.6

0.8

1

1.2

1.4

1.6

1.8

2

|<0.5y meson,|+Dtotal syst. uncertaintiespp reference syst. uncertainties[ ]

ALICE Preliminary = 5.02 TeVNNsPb-Pb,

30-50% centrality

) c (GeV/Tp

0 5 10 15 20 25 30 35 40

pro

mpt

DAA

R

0

0.5

1

1.5

2

2.5

3

3.5

|<0.5y meson,|s+D

total syst. uncertaintiespp reference syst. uncertainties[ ]


30-50% centrality

) c (GeV/Tp

0 5 10 15 20 25 30 35 40

pro

mpt

DAA

R

0

0.2

0.4

0.6

0.8

1

1.2

1.4

1.6

1.8

2

|<0.5y meson,|0Dtotal syst. uncertaintiespp reference syst. uncertainties[ ]


30-50% centrality


We would remove the D* in 1-2 GeV/c from the preliminary since the efficiency is <10^-3. We aim to work on it for the final.

We would remove the Ds in 2-4 GeV/c from the preliminary due to yield extraction not stable, efficiencies very low as well as S/B. We aim to work on it for the final.


https://indico.cern.ch/event/604215/






contradicted!.


Comparison with 2011 results


) c (GeV/Tp

0 5 10 15 20 25 30 35 40

pro

mpt

DAA

R

0

0.2

0.4

0.6

0.8

1

1.2

1.4

1.6

1.8

2

= 5.02 TeVNNs

= 2.76 TeVNNs

Total syst.

|<0.5y, |±*Prompt D30-50% centrality

30

) c (GeV/Tp

0 5 10 15 20 25 30 35 40

pro

mpt

DAA

R

0

0.2

0.4

0.6

0.8

1

1.2

1.4

1.6

1.8

2

= 5.02 TeVNNs

= 2.76 TeVNNs

Total syst.

|<0.5y, |±Prompt D30-50% centrality

) c (GeV/Tp

0 5 10 15 20 25 30 35 40

pro

mpt

DAA

R

0

0.2

0.4

0.6

0.8

1

1.2

1.4

1.6

1.8

2

= 5.02 TeVNNs

= 2.76 TeVNNs

Total syst.

|<0.5y, |0D, 0Prompt D30-50% centrality

) c (GeV/Tp

0 5 10 15 20 25 30 35 40

pro

mpt

DAA

R

0

0.5

1

1.5

2

2.5

3

3.5

= 5.02 TeV, centrality 30-50%NNs

= 2.76 TeV, centrality 20-50%NNs

Total syst.

|<0.5y, |s±Prompt D

RAA in 30-50%: 2.76 vs 5.02 TeV

Good agreement even only at statistical error level in the whole pt range

The comparison make clear the large improvement in statistical and systematic precision with 2015 sample






contradicted!.


D mesons RAA: Comparison

Plot with missing D*+ and Ds bins for a visual comparison

Very good agreement among D0, D*+ and D+. Ds agrees writhing uncertainties

Derived preliminary

w D*+ RAA in 1-2 GeV/cw Ds RAA in 2-4 GeV/c


)c (GeV/Tp

0 2 4 6 8 10 12 14 16

0/D

*+ D

0

0.2

0.4

0.60.8

1

1.2

1.4

1.61.8

2ALICE |<0.5y|

= 5.02 TeVNNs30-50% Pb-Pb, = 7 TeVspp,


2.0% BR uncertainty not shown






contradicted!.


Non-strange D meson ratios


to be re-done without Pb-Pb D* in 1-2 GeV/c


)c (GeV/Tp

0 2 4 6 8 10 12 14 16

0/D+ D

0

0.2

0.4

0.6

0.8

1

1.2

1.4 ALICE |<0.5y| = 5.02 TeVNNs30-50% Pb-Pb,

= 7 TeVspp, = 5.02 TeVNNs30-50% Pb-Pb,

= 7 TeVspp,


)c (GeV/Tp

0 2 4 6 8 10 12 14 16

+/D+ sD

0

0.5

1

1.5

2

2.5

3

3.5ALICE |<0.5y|









contradicted!.



Ds ratios

to be re-done without Pb-Pb Ds in 2-4 GeV/c


)c (GeV/Tp

0 2 4 6 8 10 12 14 16

0/D+ sD

0

0.2

0.4

0.6

0.8

1

1.2

1.4 ALICE |<0.5y| = 5.02 TeVNNs30-50% Pb-Pb,

= 7 TeVspp, = 5.02 TeVNNs30-50% Pb-Pb,

= 7 TeVspp,







contradicted!.


Technical preliminaries

RAA analyses:3 mass plots in 3 different canvases: D0 (1-2), D+ (5-6) and D*+ (24-36)

2 mass plots for Ds (low and high pt)

4 efficiencies in 4 different canvases: D0, D+, D*+ and Ds

for a total of 9 technical preliminary

In order to help in building the QM talks and posters we would like to ask for the following technical preliminaries:

D+ as example







contradicted!.


Conclusions

Signal extracted in the range 1-36 GeV/c for D0, 2(1)-36 GeV/c for D*+ and D+ and 2-16 GeV/c for Ds

good agreement data-MC for width and position in the whole pT range

Systematic evaluated. Improvment up to factor 2 for all the D mesons.Small refiment needed for D*+ tracking systematic. Ready in 2-3 days, the difference, if any, will not modify the physics message (most probably invisible by eye)

dN/dpT and RAA evaluated for all the 4 D meson species. Results are (very close to) final. Minor

D meson ratios evaluated

NOTE: in addition we aim to prepare the “average” D mesons RAA (D0, D+ and D*+). It imply just running one macro since the procedure is exactly the same as for the run I papers







contradicted!.


Backup

Mean position vs pT - comparison data-MC

)c (GeV/T

p5 10 15 20 25 30 35

Mas

s

1.85

1.855

1.86

1.865

1.87

1.875MC

data

(GeV/c)Tp

5 10 15 20 25 30 35

)2m

ean

(GeV

/c

1.866

1.868

1.87

1.872

1.874

1.876

1.878

1.88DataMCPDG value






contradicted!.


)2Sigma (GeV/c2 4 6 8 10 12 14 16

)2Si

gma

(GeV

/C

0.004

0.006

0.008

0.01

0.012

0.014

0.016

0.018

0.02

Peak width

FreeMC+15%MC

Peak width

)2Mass (GeV/c2 4 6 8 10 12 14 16

)2M

ean

(GeV

/C

1.962

1.964

1.966

1.968

1.97

1.972

1.974

1.976

Peak position

DataMCPDG

Peak position

D0

D+

Ds

Pt (GeV/c)5 10 15 20 25 30 35

)2

Mass

(G

eV

/c

0.143

0.1435

0.144

0.1445

0.145

0.1455

0.146

0.1465

0.147

0.1475

0.148

Data

MC

D*+

Yield extractionWhat about RHIC results





contradicted!.


For Ds: signal shape (mean and σ free/fixed to MC values), fit ranges, bin widths

Ds: 8-12 GeV/c


For more details see the PF presentation:


Mean position vs pt - comparison data-MCWhat about RHIC results





contradicted!.


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