Kevin Dusling
Physical Review Letters
Raju Venugopalan
Brookhaven National Laboratory

Quark	
  Ma(er	
  2014報告	
  (Heavy	  ﬂavor)	
林 真一（東大CNS）	
  HIP/HIC合同研究会	
  	
  2014.06.06	
  Heavy	  ﬂavor	  in	
  heavy	
  ion	  collisions	• Open	  heavy	
  ﬂavor:D,	
  B,	
  e,	
  μ	
  ←	
  D,	
  e,μ	  ←B	
  – Energy	
  loss	  – Thermaliza8on	
  – Cold	  nuclear	
  ma<er	
  eﬀects	
  • Quarkonia:	
  J/ψ,	
  ψ’,	  Y	  – Mel8ng	
  	
  – Regenera8on	
  – Cold	  nuclear	
  ma<er	
  eﬀects	  • (Exo?c	
  state?)	
  – Charmed	
  baryon,	
  tetra	
  quarks,	
  penta	
  quarks…	
  Spectrum,	
  RAA/RpA(QpPb),	
  v2,	
  angular	
  correla8on…
Rapidity,	
  pT,	
  event	
  ac8vity,	
  system	
  energy,	
  system	
  size…	  2014/06/06	

HIP/HIC合同研究会	

2	

D,	
  J/ψ,	
  Y	
  mulEplicity	
  dependence	
  	
ALICE	  D:|η|<0.5,	
  2	
  <	
  pT	
  <	
  4	
  GeV/c	  • pp、p−Pb	  – 強いmul8plicity依存性を確認	  – J/ψ,Υでも同様の依存性	
  – Pythia(6.4,	
  Perugia	
  2011)では再現しない	  • 定性的には、p−Pbではbinary	
  collisionの増加とconsistent	  • p−pでは？	
  – Mul8ple	
  parton	
  interac8on？	
  
D	
  
J/ψ	

D	
  
J/ψ	

Υ(1s)	

2014/06/06	

HIP/HIC合同研究会	

Υ(2s)	

3	Open	
  heavy	
  ﬂavor	

2014/06/06	

HIP/HIC合同研究会	

4	

Open	
  Heavy	
  ﬂavor	
  at	
  mid-­‐rapidity	
  	
  in	
  p-­‐Pb	
• D	
  meson	  RpA(mid-­‐rapidity)	
  – CGC	  	
  – pQCD(EPS09)	
  	
  – Shadowing	
  +	
  energy	
  losss	
  +	
  kT	
  broading(Vitev)	
  ともに一致	  • Heavy	
  ﬂavor	
  electron	
  in	
  midrapidity	
  (-­‐1.06	
  <	
  y	
  <0.14)	
  – Enhancement	
  確認されず	Average	  D	

2014/06/06	

HIP/HIC合同研究会	

5	

Heavy	  ﬂavor	
  at	
  forward/backword	
  in	  p-­‐
Pb	

•
•
•
•

Forward： 変化は見られず	  Backward:	
  low	
  pTでenhancement	
  pQCD計算(Pythia	
  NLO	
  tune,	  EPS09)と一致	
  – An8-­‐shadowingの効果	  しかし、RHICではEPS09では一致せず(PYTHIAのparametriza8onは違う）	
  2014/06/06	

HIP/HIC合同研究会	

6	

RpPb	
  for	  B	  meson	•

CMSがp-­‐Pb	
  でのB	  (→	
  J/ψ+X)を測定	
  – pp	
  reference	  • FONLL	
  計算を使用	  • h<p://www.lpthe.jussieu.fr/~cacciari/fonll/
fonllform.html	
  – RpPbはpT	
  >	
  10	
  GeV/c	
  で1	
  2014/06/06	

HIP/HIC合同研究会	

7	

Double	  ridge	
  for	
  Heavy	
  ﬂavor	
  electron	• Electron-­‐hadron(from	
  D,	
  B)	
  correla8on	  	
  – Double	
  ridge	  structureを確認	
  – CGC?	
  Hydrodynamics?	
  2014/06/06	

HIP/HIC合同研究会	

8	dilepton	
  in	
  d+Au	  at	
  RHIC	– Dielectron	  • High	  mass,	
  low	
  mass	  high	  pTでbからの寄与がdominant	  p + p equivalent cross sections extracted from PYTHIA and MCNLO as• Pythia(CTEQ5L	  ),	
  MCNLO（CTEQ6L）で一致	
  	
   • æbb = 3.4 ± 0.28(stat) ± 0.46(s ys)µb
	
   The difference between MCNLO and PYTHIA extracted bottom cross se
	
  
tions
are less than 2%
	  	
   PHENIX Heavy Flavor : 2014-05-19
17
Alan Dionelectron-muon correlatio
	
  
	
  
	
  
	
  

– e-­‐μ	
  correla8on(central-­‐forward)	
  • Away	  sideの相関が消失	  • Gluon	
  shadowing?	
  Satura8on?	
  average x-range of 5 £ 10°3

2014/06/06	

HIP/HIC合同研究会	

9	

HF	
  RAA:	
  Au+Au	  vs.	
  Cu+Cu	

	
  	
  	
  	
  	
  	
  	
  	
  	
  Cu+Cu@PHENIX	  • Peripheral:	
  enhancement	
  	
  
	
  
	
  
	
  
	
  〜central	
  d+Au	  	
  • Central:	
  suppression	
  
	
  
	
  
	
  
	
  	
  〜peripheral	
  Au+Au	  	
  2014/06/06	

HIP/HIC合同研究会	

10	

D	
  meson	  RAA:	
  Au+Au	  vs.	
  U+U	
• U+U	
  – 8p-­‐8pでAu+Auよりエネルギー密度20	
  %増加	  – Au+Auと誤差の範囲内で同様のcentrality	
  依存性	  2014/06/06	

HIP/HIC合同研究会	

11	

D	
  meson	  RAA:	
  RAA	
  vs.	  pT	  (RHIC	
  &	
  LHC)	
•Au+Au	
  – High	  pT	
  でsuppression	  – Low	
  pTでenhancement：recombina8on?	
  Shadowingの効果？Radial	
  ﬂow?	
  Pb-­‐Pb	  D-meson
RAA and– p-­‐Pb	
  に比べ明らかなsuppression→medium中でのenergy	
  
loss	
  
– Low	
  pTでenhancementは見られない（RHICとは異なる振る舞い）	
  Nuclear modification factor

NEW @QM14

Au+Au	

arXiv:1405.3452

ALICE

1.6

p-Pb, sNN=5.02 TeV
0+-0.96<y cms<0.04*+

Average D , D , D

Pb-Pb, sNN=2.76 TeV

1.4|y cms|<0.5

centrality 0-20%
centrality 40-80%

1.2

1.

1.

1.

1.

1
0.8

0.

0.6

0.

0.4

p-Pb
Pb-Pb 40-80%
Pb-Pb 0-20%

0.2
0
0

2014/06/06	

RAA prompt D

•

5

10

15

20

0.

25

p T (GeV/c )๏ 合同研究会	
Comparison with D-meson nuclear
HIP/HIC
ALI−PUB−79458

0.

ALI−DER

12	
Sim
๏

Op

HF	
  RAA	
  and	  v2	  vs.	
  √s	

Dif

He

PHENIX	

Flo
imp

HF v2

PH
sta
PHENIX	
and• RAA	
  enhancement	  – Energy	
  lossとは矛盾 	
  – Light	
  hadronではsuppression確認	
  

STAR	

• v２	
  
– Low	
  pTでSTARではzero	
  consistentか？	
  – PHENIXではnon-­‐zero?	
  2014/06/06	

HIP/HIC合同研究会	

13	

RAA	
  (B)	  AND	  RAA(D)	
• B→e	  D9mesons%and%non9Prom– Pb−Pb： Beauty-decay
pT	
  >	
  3	
  GeV/c	
  でsuppresion（HF→eと同程度？）	
  electron RAA

mass dependence?: D-meso! Quark
Test$the$quarkDmass$dependence$of$eD	
  |y|<0.5	
  NEW @QM14
1.4 Non-­‐prompt	
  J/ψ	
  |y|<1.2	

– Low	  pT	  でenhancement?	
  lepton RAA at LHC and RHIC
2.5 B → μ + HF-decay
X, B.R.~11%

1.2

Hierarchy
in energy loss?
RpPb(b→e)(min. bias)
1

Expectation from radiative energy
loss: 'EgNon-prompt> 'Eu,d,sJ/>s 'Ec >CMS Preliminary
μ:HF→	  2.5 <e(|y|<0.6)	
  y<4
ALICE Preliminary
6.5<p <30 GeV/c, |y|<1.2
3.5
e:HF→	
  |y| < μ0.6
(2.5	
  <|y|<4)	
  Could be reflected in an hierarchy Tof RAA: RAA(B) > RAA(D) >0-­‐20%	

R

D → μ +Pb-Pb,
B.R.~10%s NNsuppression= 2.76 TeV,
0-20%
Significant
at highpT centrality•X,
down to 200 GeV

4pPb

RAA(b→e) B→e	
  (0-20%)(|y|<0.8)	
  ALICE Preliminary D mesons
8<p <16 GeV/c, |y|<0.5
TCorrelated systematic uncertainties
Uncorrelated systematic uncertainties

Systematic uncertainties
2
p-Pb,
0.8 sNN = 5.02 TeV, -1.06< yCMS <0.14
b (A c) A e, |y| < 0.8
0-­‐10%	
3
CMS-PAS-HIN-12-014(mid rapidity) & c,b→μ
1.8
Front
ALICE ๏ c,b→eb (A c) A e
syst.
uncertainty(forward rapidity)
Pb-Pb, sNN = 2.76 TeV
absorber
1.6
syst error
nomalization uncertainty
2.5
Heavy flavour decay µ 0-10% central, 2.5<y<4.0
๏ c,b→e & b→e (mid rapidity)
D meson
0.6 and normalization uncertainty
Heavy flavour decay e 0-10% central, |y|<0.6

2

1.5

RAA

RAA

– RHeavy-flavour
AA(B)	  >	  RAA(D)	
   decay muon RAA

RAA

• D	
  vs	
  Non-­‐Prompt	
  J/ψ	
  ±1.4

(mid rapidity): FONLL
๏ B+, B0, BsTracking
expectation
as a pp referencechambers

1.2

1

2

1.5

1
0.8

0.4

ALICE Preliminary
0LI−PREL−74678

1
2
Dipolemagnet

1

0.6

μ

0.5

3

0.5

0.2

4

Triggerchambers

5

6

7

0
0

28

4

6

80 10

p (GeV/ c ) ALI−PREL−76455

J/\←B (fromCMS) RAA vs.
0.4
centrality in pT
ranges tuned
0.2
to have<pT(D)>  ≈  Pb-Pb, sNN = 2.76 TeV<pT(B)>
0

1
12

14

2
16

18

๏

3 0

4 50

p (GeV/c)
CMS-PAS-HIN-12-014
T

ALI−DER−52638

ALI−DER−36791

T-> clear ind
for RAA(B) >±with pp ref. from scaled cross section at s = 7 TeVwith pp ref. from FONLL calculation at s = 2.76 TeV

D. Caffarri, Wed 9:00
A. Rossi,
Heavy-flavour decay muon
RAA atMon 14:50

5100 6150

7200->consisten
the expecta'Ec > '

8250

300

350

400

p N(GeV/weightedc)with NT

part

Centrality



coll

Muon tracks reconstructed with the forward ALICE
Analysis
based on the study of the forward
electron
impactparameter
distribution.
rapidity
compatible
with
Muon
spectrometer	(-4<η<-2.5)
2014/06/06
HIP/HIC
合同研究会	
14	
HP13%Cape%Town,%6/11/2013%
tracking ⟷ trigger chambers.
ALICE%Heav- Matchingthat of heavy-flavour
MinJungFirstmeasurementof the beauty-decay
electron Rdecay
RKweon,for pT >Quark
3 GeV/c.
Matter 2014
AA indicates
AA <Inha1University
MinJung Kweon, Inha University

Quark Matter 201431

Quarkonia	

2014/06/06	

HIP/HIC合同研究会	

15	

J/ψ	
  vs.	
  open	  heavy	
  ﬂavor	  in	
  d+Au	• Forward	
  Open#HF#versus#J/ψ#– J/ψ,	
  open	  heavy	
  ﬂavorで同程度のsuppression	
  • mid-­‐rapidity,	
  Backward	  Sensi_ve#to#same#ini_al#state#eﬀects:#gluon#shadowing,#kT#broadening,#– Open	  heavy	
  ﬂavorのenhancement(cronin?)に対しJ/ψではpartonic#energy#loss#in#nucleus#(details#on#open#HF#in#S.#Lim’s#talk)#enhancementは確認されず	
  BIG#diﬀerence:#nuclear#breakup#of#charmonia#bound#states##*Keep#in#mind#diﬀerent#kinema_cs#for#decay#leptons#from#single#charm#quark#versus#fully#
reconstructed#cc#state#
PRL!109,!242301!
arXiv:1310.1005!
PRC!87,!034904!

Forward:#similar#behavior#=Short#_me#in#nucleus#=Low#co=mover#density#

2014/06/06	

arXiv:1310.1005!
PRC!87,!034904!

PRC!87,!034904!

Mid=#and#backwards#rapidity:#DIFFERENT#behavior#enhanced#open#HF#versus#suppressed#J/ψ#HIP/HIC合同研究会	

16	

J/ψ	
  in	
  p-­‐Pb@ALICE	
Inclusive	  J/ψ	

• rapidity依存性	  ••Forwardでsuppression、Backwardでenhancement	
  Energy	  lossを含む模型(Arleo.et.al)	
  が最も結果を再現	
  • RFB,	
  pT	
  依存性	
  – Low	
  pTで振る舞いは再現できず？	

2014/06/06	

HIP/HIC合同研究会	

17	

J/ψ	
  in	
  p-­‐Pb@LHCb	

Pseudo	  proper	
  8meによりPrompt	
  J/ψ	  とNon-­‐prompt	
  J/psiを選別 	  	
  Prompt	  J/ψ	  – ALICEの結果とほぼ一致	
  Non-­‐Prompt	
  J/ψ	  	
  – pQCD計算とコンシステント	  	  2014/06/06	

HIP/HIC合同研究会	

18	

ψ（2S）	
  in	
  p-­‐Pb	  	••\(2S) RpPb vs ycms

Backward	  でも抑制確認	  – PHENIX(mid	
  rapidity)でも確認	  – Ini8al	
  state	  eﬀectsはJ/ψと変わらない	  – 核内でのbreakupは考えにくい（τc<τform）	
  – Co-­‐mover	
  hadronによるbreakup?	
  J/ψとのdouble	
  ra8o	  – Forward	
  suppressionに比べbackwardでより強いcentrality	
  依存性	  ψ（2S）	  J/ψ	2014/06/06	

ψ（2S）	  J/ψ	

HIP/HIC合同研究会	

The \(2S) suppression with respect to binary scaled pp yield can bequantified with the nuclear modification factor
Can the stronger suppression of the weakly bound \(2S) be due
to break-up of the fully formed resonance in CNM?

ψ（2S）	  J/ψ	arXiv:1405.3796

possible if formation time
(Wf ~0.05-0.15fm/c) < crossing time (Wc)
forward-y:
Wc~10-4 fm/c
backward-y:
Wc~710-2 fm/c

Wc

L

E zJ

D. McGlinchey, A. Frawley and R.Vogt,
PRC 87,054910 (2013)

break-up effects excluded atforward-y
at backward-y, since Wf ~Wc , break-up
in CNM can hardly explain the verystrong difference between J/\ and\(2S) suppressions

Final state effects related to the (hadronic) medium created in the p-Pb
14
collisions?

Forward	  backward	19	Υ（1S）	
  in	
  p-­‐Pb	

• ALICEとLHCbでinconsistent?	
  	
  – 誤差の範囲内では一致？	
  – ALICE：forwardでJ/ψ程度のsuppression,	
  	
  backwardでも依然suppression	  – LHCb:J/ψに比べsuppressionが少ない、backwardでenhancement	  – ppのInterpola8on	
  の仕方が異なる	
  

	
  

2014/06/06	

HIP/HIC合同研究会	

20	

Υ(nS)	
  in	
  p-­‐Pb	
  	• Pb-­‐Pbほどのsuppressionは見られず	  – Pb-­‐Pbのsuppressionはsequen8al	
  mel8ng？	
  – 定性的にはhigh	
  mul8plicityでより強いsuppression	

2014/06/06	

HIP/HIC合同研究会	

21	

J/ψ	
  RAA:	
  centrality	
  dependence	
• ALICEとPHENIXの比較（inclusive	  J/ψ）	
  – LHCではRHICほど抑制されていない	  – LHCではrecombina8onが効いている	
  2014/06/06	

HIP/HIC合同研究会	

22	

J/ψ	
  RAA:	
  comparison	
  to	
  RpPb	
• Low	
  pTでenhancement	  – Recombina8onとconsistent	
  • High	  pTではsuppression	

2014/06/06	

HIP/HIC合同研究会	

23	

J/ψ	
  RAA:	
  comparison	
  to	
  models	
• Regenera8on模型が実験結果を再現	

mid-­‐rapidity	
  |y|<0.8	
  Forward	
  rapidity	
  2.5	
  <	
  y	
  <	
  4	
  

Regenera8on	
2014/06/06	

regenera8on	
HIP/HIC合同研究会	

24	

J/ψ	
  v2	

•
•

ALICE	
  – Non-­‐zero	
  v2確認	  – Recombina8onとconsistent	
  	
  CMS	
  – High	  pT	
  J/ψでもnon-­‐zero	
  v2(〜v2had〜v2D)：Path	
  length依存性？	
  2014/06/06	

HIP/HIC合同研究会	

25	

Bo(omonium	
  RAA	• RHIC,	
  LHCともにmid	
  rapidity	
  で同程度のsuppressionを確認	
  • LHCでラピディティ依存性を確認	
  2014/06/06	

HIP/HIC合同研究会	

26	

Summary	p-­‐Aと重イオン衝突の結果の比較が可能	
  
	
  
	
  
	
  →今まで見えていた現象の解釈	
  Low	
  energy,	
  p/d-­‐A自身についても興味深い結果	
  • Open	  heavy	
  ﬂavor	  – p-­‐p	
  Mul8plicity	
  dependence:	
  Mul8ple	
  parton	
  interac8on?	
  – RpPb:	
  原子核効果見られず-­‐>	
  RAA	
  suppression	
  はenergy	  loss	  – Double-­‐ridge	
  in	
  p-­‐Pb:	
  CGC?	
  Hydro?	
  – energy	
  dependence:	
  enhancement,	
  nonzero	
  v2	
  at	
  √s=64	
  GeV	  – RAA(B)	
  >	
  RAA(D)	
  • Quarkonium	  – ψ(2S)	
  suppression	
  at	
  backward→	
  co-­‐mover	
  breakup?	
  – J/ψ	
  RpPb	
  vs	
  RAA:	
  enhancement	
  at	
  low	  pT	  →	  regenera8on	  – High	  pT	
  J/ψ	  v2	  – Υ(nS)/Υ(1S)	
  in	
  p-­‐Pb:	
  Pb-­‐Pbほどのsuppression見られず→Sequen8al	
  mel8ng	
  – Υ	  RAA:	
  rapidity	
  依存性?	
  2014/06/06	

HIP/HIC合同研究会	

27	

Back	  up	

2014/06/06	

HIP/HIC合同研究会	

28	

B	
  meson	  in	
  p-­‐p	
• FONLL	
  計算	

2014/06/06	

HIP/HIC合同研究会	

29	

Model	  constraint	

2014/06/06	

HIP/HIC合同研究会	

30		
  ψ’@RHIC	
• J/ψに比べcentrality	
  が大きいとこ
ろでで強いsuppression	
  • Crossing	
  8meは十分短い	
  midrapidity	– τform〜0.05-­‐0.15fm/s	  – Inside	
  breakup	
  は考えにくい	  – Co-­‐mover	
  によるbreakup?	
  	
  • Mul8plicity	
  依存性	  – Co-­‐mover	
  hadron密度（もしくはmedium）を反映？	
  2014/06/06	

HIP/HIC合同研究会	

31	

D	
  meson	  RAA@LHC	
• RpPbに比べ明らかなsuppression	
  – medium中でのenergy	  lossによるもの	
  • DS測定	  2014/06/06	

HIP/HIC合同研究会	

32	

D	
  meson	  ﬂow	

D-meson flow

	
  	
  
• Non-­‐zero	
  v2を確認	  Poster Davide Caffarri
Tue 20.04 16:30-18:30

ALICE collaboration, PRL 111, 102301 (2013
ALICE collaboration, arXiv:1405.2001 [nucl-

New

– pT	
  >	
  2	
  GeV/cでcharged	
  hadron	
  と同程度	  – Single	
  electron/muonでもv2を確認	
  • Charm	
  quarkの熱平衡化?	
  30-50%

10-30%

0-10%

Hint for an increase of v2D

centralsemi-central

D-meson v2 similar to charged particle v2●●

Confirm significant interaction of charm quarks with the medium
Suggest collective motion of low-pT charm quarks in the expanding fireball-9-

Raphaelle Bailhache

2014/06/06	

HIP/HIC合同研究会	

Hint for an increase of v2e←HF
central33	ψ（2S）：PbPb	

• High	  pT	
  suppression	
  – Mel8ng	
  • Inclusive	  ψ（2S）	
  – Recombina8on	
  と	
  consistent	  2014/06/06	

HIP/HIC合同研究会	

34	

J/ψ	
  System	
  size依存性	
• 緩やかなsuppression傾向	  • 核種依存性は見られず	
  2014/06/06	

HIP/HIC合同研究会	

35	

J/ψ	
  at	
  low	
  energy	
• STAR	  PHENIXともにLow	  energy	
  でもsuppression	
  を確認	  • 200	
  GeVが最も顕著なsuppression	
  – Recombina8on	
  modelと逆の傾向	

2014/06/06	

HIP/HIC合同研究会	

36	

J/ψ	
  in	
  Cu+Au	• Cu-­‐goingとAu-­‐goingで異なるxをプローブ	
  – Cu-­‐going側はAu内のx(より小さいx)をプローブするた
めAu-­‐goingに比べ原子核効果を受けやすい→Rは小さくなる	
  • Final	
  state	  eﬀect	  – Au-­‐goingがよりsuppressされるはず→R	
  は大きくなる	
  Npart>100でRは増加	
  CNM:	
  EPS09+	
  4mb	
  breakup	
2014/06/06	

HIP/HIC合同研究会	

37	

D-­‐hadron	
  correlaEon	

D- hadron azimuthal correlations in p-Pb

• pp,	  p-­‐PbでD-­‐hadron相関を測定	  p-Pb @√s = 5.02 TeV– Near	  side,	
  away	  sideピークを確認	
  Multiplicity integrated measurement• Detector	
  upgrade(2018〜？)後に本格測定	
  Azimuthalazimuthal
correlations in 2 intervalsof D meson pT (5-8,
8-16 GeV/c)
D- hadroncorrelations:
p-Pb
vs pp
– Energy	
  
l
oss,	
  
t
hermaliza8on	
  Extraction of near side yield for comparison with pp– Cold	  nuclear	  ma<er	
  eﬀects の検証	  Baseline subtracted
assoc (rad-1)-1baselinedN(rad-1)
N D d6

47

3.5
6

5
2.5

1 dN
N D d6

assoc

3

24

D meson - charged particle correlation
D meson - charged
particle azimuthal correlations
0 + *+
Average D
0 ,D+ ,D*+
AverageD D . D , D
8 < p < 16 GeV/c , p assoc > 1.0 GeV/ c , |6d| < 1.0TT-1
p-Pb, s NN = 5.02 TeV, L int = 50 µb

ALICE Preliminary

pp s=7 TeV

D|6d|<1.0
8 < pp-Pb< 16s GeV/c,
p assoc > 1.0 GeV/c,=5.02 TeV
baseline uncertainty pp
T

NN

T

+11%
-9% scale uncertainty

baselinePreliminary
uncertainty p-Pb
ALICE
+13%

Fit function: f(6 ) = C +

YNS
2/mNS

exp -

uncertainty(6 )2-10% Yscale(6 -/)2 ppAS+
exp 2m2NS +11%2m2AS p-Pb
scale
uncertainty
2
/
m
-9%
AS

Parameter C (baseline) fixed to the weighted average of points in //4 < ±6 < //2

NEW

1.5
3

D meson-charged
particleazimuthalcorrelations
D meson-charged
particleazimuthalcorrelations
4.54.50 0*+ *+ + +averageD ,Daverage
D ,D, D, D

4 4

3.53.5-1
p-Pb, s NN=5.02 TeV, L int = 50 µb pp, s =7 TeV

p assoc>1.0 GeV/cp assoc
T >1.0 GeV/cT

p-Pb,
s NN=5.02 TeV
ALICEPreliminaryd|<1.0
|6d|6
|<1.0

3 3

Systematic Uncertainty

ALICE Preliminary

D meson and hadron v2 hypothesis

2.52.5NEWNEW

1.51.5
1 1

NEW

1
0

0.50.5-1-1

ALI−PREL−79884
ALI−PREL−77157

2014/06/06	

5 5

2 2

1
2
0.5

-0.50

Near side associated yield
Near side associated yield

NN

0 0

1 1

2

2

3

3 4

4 5
6 6(rad)
(rad)

0 0
2 2

4 4

ALI−PREL−80473
ALI−PREL−80184

6 6

8 8

1010

1212

1414

1616

D meson(GeV/
p Dpmeson
(GeV/
c) c)
T T

HIP/HIC合同研究会	
38	Compatibility within uncertainties between the pp at √s = 7 TeV and p-Pb at √sNN = 5.02

pp	
  reference	
  of	
  Υ	
•

ALICE	  pp	  reﬀerence	pp reference @ 2.76 TeVApproach used for preliminary results• Energy interpolation at mid-rapidity– using CDF@1.8 TeV, D0@1.96 TeV,CMS@2.76 TeV, CMS@7 TeV data
– and several “reasonable” functional forms– but also pQCD FONLL calculation– Test and select many Pythia tunes using CMS
and LHCb data at 7 TeV– With selected tunes extrapolate the mid-rapidity
point above to forward rapidity

Approach used for the publication• Use data from LHCb [EPJC74 2835 (2014)]• pp cross section at 2.76 TeV (2.5<y<4)– LHCb measurement:σ[ϒ(1S)→µµ]=0.670±0.025 (stat.)±0.026 (syst.)nb– ALICE extrapolation:σ[ϒ(1S)→µµ]=0.465+0.071-0.045 (extrap.)±0.041(norm.) nb

2014/06/06	

Javier Castillo

BR× dm/dy (nb)

• Rapidity extrapolation

CMS

1

Pythia normalized

0.8

LHCb

0.6
pp s = 2.76 TeVInterpolated [ (1S) cross section

0.4

Data samples:
CDF s = 1.8 TeV, D0 s = 1.96 TeV,CMS s = 2.76 TeV, CMS s = 7 TeV

0.2

y -extrapolation: Pythia6.4,
normalized to the mid-rapidity result

00.5

HIP/HIC合同研究会	

1

1.5

2

2.5

3

3.5

4

4.5

y

20

39	

Outlook	• LHC	  	
  – Run2	
  :来年５月から稼働	
  • 約10倍の統計	
  – Run3:	
  • ALICE,Detector	
  upgrade：ITS,	
  TPC,	
  MFT….	
  – B,	
  D-­‐D	
  correla8on,	
  Λc….	
  • PHENIX	  – Vertex	
  の結果	
  – sPHENIX	  • STAR	  – HFT:	
  B/D	
  separa8on,	  	
  – Muon	
  telescope	
  detector:	
  e-­‐μ	
  correla8on	
  for	
  heavy	
  ﬂavor	  correla8on	
  	
  2014/06/06	

HIP/HIC合同研究会	

40