Heavy flavor production and flow in large and small systems with ATLAS. Qipeng Hu for the ATLAS Collaboration University of Colorado Boulder

Transcription

1 Heavy flavor roduction and flow in large and small systems with ALAS Qieng Hu for the ALAS Collaboration University of Colorado Boulder

2 Motivation Heavy flavors (HF) robes are unique for studying QGP in A+A collisions: Large mass Most from hard scattering, QCD calculable Heavy flavors in +A / collisions: (raditionally) baseline for understand A+A collisions Probing small QGP dro in small systems

3 Heavy flavor 6 robes Pb+Pb,. nb in ALAS Pb+Pb,. nb η < η < HF muons Momentum imbalance Δ = - ( MS + Calo ) temlate fit Not reviewed, for internal circulation only dδ/ dn µ N µ dn µ dδ/ dn µ dδ/ N µ N µ ALAS =.76 ev -% 5 < < 5.5 GeV -% Pb+Pb -6% Pb+Pb... Δ/ ALAS Data s =.76 ev Signal NN - Background Pb+Pb,. nb Fit temlate η < -% -% 5 < < 5.5 GeV < < GeV... - Δ/ ALAS =.76 ev -6% 5 < < 5.5 GeV... ALAS Data Δ / s =.76 ev Signal NN - Background Pb+Pb,. nb Fit temlate η < -6% -6% 5 < < 5.5 GeV < < GeV < < GeV reresent the signal and background temlate distributions weighted by f sig and (... - Data Signal Background Fit temlate Δ/ ALAS s =.76 ev -, 57 nb η <... ALAS s =.76 ev -, 57 nb η < 5 < 5 < < MS < 5.5 GeV < GeV... δ < < 5.5 GeV Data δ Signal Background Fit temlate Data loss Signal Background Fit temlate Figure : Examles of temlate fits to Pb+Pb and data. he to anels show results for 5 < < 5.5 GeV and the bottom anels show results for < < GeV. he -6% left, middle, and right anels show results for Pb+Pb %, Pb+Pb 6%, and, resectively. he black oints reresent the data. he dotted and dashed lines and the continuous lines reresent the summed temlate distributions. < GeV / loss Δ/ / f sig ), resectively (see text) combination of signal and background distributions... Δ/ Figure : Examles of temlate fits to Pb+Pb and data. he to anels show results for 5 < < 5.5 GeV and dn µ the bottom anels show results for < = f< sig dp sig GeV. he + left, middle, f sig dp bkg and right, anels show results for Pb+Pb %, Pb+Pb 6%, and N µ, d / resectively. he d / black oints reresent d the /data. he dotted and dashed lines reresent the signal and background temlate distributions weighted by f sig and ( f sig ), resectively (see text) arxiv: 85.5

4 Heavy flavor 6 robes Pb+Pb,. nb in ALAS Pb+Pb,. nb η < η < HF muons Momentum imbalance Δ = - ( MS + Calo ) temlate fit bottom to charm ratio in by FONLL Not reviewed, for internal circulation only dδ/ dn µ N µ dn µ dδ/ σ b /σ c dn µ dδ/ N µ N µ dn µ dδ/ % Pb+Pb -6% Pb+Pb ALAS Data s =.76 ev Signal NN - Background Pb+Pb,. nb Fit temlate η < -% -% 5 < < 5.5 GeV < < GeV... Figure : Examles of temlate fits to Pb+Pb and data. he to anels show results for 5 < From FONLL < 5.5 GeV and the bottom anels show results for < -% < GeV. he -6% left, middle, and right anels show results for Pb+Pb %, Pb+Pb 6%, and, resectively. he black < < GeV oints < < reresent GeV the data. he dotted < and < dashed GeV lines reresent the signal and background temlate distributions weighted by f sig and ( f sig ), resectively (see text) and the continuous lines reresent the summed temlate distributions. N µ 8 6 ALAS =.76 ev -% 5 < < 5.5 GeV... Data Signal Background Fit temlate Δ/... - Δ/ Δ/ ALAS =.76 ev -6% 5 < < 5.5 GeV... ALAS Data Δ / s =.76 ev Signal NN - Background Pb+Pb,. nb Fit temlate η < -6% -6% 5 < < 5.5 GeV < < GeV... Data Δ / Signal Background Fit temlate... combination of signal and background 6 distributions 8 Figure : Examles of temlate fits to Pb+Pb and data. he to anels show results for 5 < < 5.5 and dn µ the bottom anels show results for < = f< sig dp sig GeV. he + left, middle, f sig dp bkg and right, anels show results for Pb+Pb %, Pb+Pb 6%, and N µ, d / resectively. he d / black oints reresent d the /data. he dotted and dashed lines reresent the signal and background temlate distributions weighted by f sig and ( f sig ), resectively (see text) - Δ/ Δ/ ALAS s =.76 ev -, 57 nb η <... ALAS s =.76 ev -, 57 nb η < 5 < 5 < < MS < 5.5 GeV < GeV... δ < 5.5 GeV Data δ Signal Background Fit temlate Data loss Signal Background Fit temlate... / loss Δ/ Δ/ / arxiv: 85.5

5 Heavy flavor robes in ALAS D mesons π ointing angle αxy refitted Kπ vertex K Weighted Events / 5 MeV 8 ALAS Preliminary Pb = 8.6 ev -.5 < y* <.5 5. < < 6. GeV χ /ndof =.9 Data Fit D +D Signal Comb. Bkg kπ Swaed MS SV D Kπ Decay m(kπ) decay length Lxy D D Kπ y PV D Kπ decay vertex selection: Event collected by MinBias trigger x Vertex robability Pointing angle Dominated by oen charm contribution 5 Decay length significance L xy / σ(l xy ) ALAS-CONF-7-7

6 Heavy flavor robes in ALAS D mesons π ointing angle αxy refitted Kπ vertex K Weighted Events / 5 MeV ALAS Preliminary +Pb = 8.6 ev -.5 < y* <.5 5. < < 6. GeV χ /ndof =.9 Data Fit D +D Signal Comb. Bkg kπ Swaed Weighted Events /.5 MeV ALAS Preliminary MS +Pb = 8.6 ev Data Fit (±) D * Signal Bkg -.5 < y* <.5 χ /ndof =. 5. < < 6. GeV.75 < m(k π) <.96 GeV SV.5 D Kπ Decay m(kπ) m(kππ) - m(kπ) [MeV] decay length Lxy D D Kπ D* D π Kππ y PV D Kπ decay vertex selection: Event collected by MinBias trigger x Vertex robability Pointing angle Dominated by oen charm contribution 6 Decay length significance L xy / σ(l xy ) ALAS-CONF-7-7

7 Heavy flavor robes in ALAS Non-Promt J/ψ Weighted Events / MeV 5 µµ. < <. GeV -. < y* <.5 χ /ndof =. ALAS +Pb - = 5. ev, L = 8 nb Data Fit Promt ψ(ns) Non-romt ψ(ns) Bkg Cal MS 5 Weighted Events /. s µµ. < <. GeV -. < y* <.5 χ /ndof =.66 ALAS +Pb - = 5. ev, L = 8 nb Data Fit Promt ψ(ns) Non-romt ψ(ns) Bkg m µµ 6 8 τ µµ [s] Fit rojection on mass Fit rojection on seudo roer lifetime Non-Promt J/ψ refers to J/ψ from B hadron decays Measured via dimuon decay channel Extracted from D fit in invariant mass and seudo roer lifetime 7 EPJC 78 (8) 7

8 Heavy flavor robes in ALAS HF muon (Oen Charm + Beauty) HF muon yield and flow in.76 ev Pb+Pb HF muon flow in 8.6 ev +Pb relim. D meson (Oen Charm) D meson yield and flow in 8.6 ev +Pb relim. Non-romt J/ψ (Oen Beauty) Non-romt J/ψ yield in 5. ev Pb+Pb Non-romt J/ψ flow in 5. ev Pb+Pb relim. Non-romt J/ψ yield in 5. ev +Pb 8

9 Heavy flavor robes in ALAS HF muon (Oen Charm + Beauty) HF muon yield and flow in.76 ev Pb+Pb HF muon flow in 8.6 ev +Pb relim. D meson (Oen Charm) D meson yield and flow in 8.6 ev +Pb relim. Non-romt J/ψ (Oen Beauty) Non-romt J/ψ yield in 5. ev Pb+Pb Non-romt J/ψ flow in 5. ev Pb+Pb relim. Non-romt J/ψ yield in 5. ev +Pb 9 New or udated since last QM

10 centrality intervals scaled by the corresonding h AA i. Also shown is the measured heavy-flavor muon di erential cross-section. For clarity, the results for the di erent centralities are multilied by scale factors that are indicated in the legend. he cross-section is re-lotted multile times, as dashed lines, multilied by these scale factors, for comarison with the results for the di erent Pb+Pb centralities. he error bars and shaded bands reresent statistical and systematic uncertainties, resectively, and in many cases are too small to be seen. HF muon RAA in Pb+Pb ALAS =.76 ev ALAS =.76 ev Pb+Pb,. nb, 57 nb % -% -6% Pb+Pb,. nb, 57 nb η < % -% η < 6 8 Figure 7: he measured Pb+Pb heavy-flavor muon as a function of. For clarity, the centrality intervals are slit between HF muon the two anels. measured he left anel shows in 5 results centrality for the %, slices %, covers and 6% -6% centrality intervals while the right anel shows results for the % and % intervals. he error bars reresent statistical uncertainties. Significant he boxessuression indicate theoretical~ uncertainties. most of h AA central i. he shaded bands reresent the exerimental systematic uncertainties. Strong centrality deendence. No significant deendence on arxiv: 85.5

11 Not reviewed, for internal circu HF muon in Pb+Pb RAA 6 8 -% %.8 η < % ALAS HF µ ± ALICE HF e ± ALICE HF µ ± : η < : y <.6 :.5<y < 6 8 r muon measured in this analysis to similar measurements for eavy-flavor electrons at mid-raidity. ( y <.6) from the ALICE atic and statistical uncertainties added in quadrature. he h AA i ents and are excluded from the comarison % -% % , 57 nb Pb+Pb,. nb - η < -6% ALAS -, 57 nb Pb+Pb,. nb ALAS HF µ ± η < =.76 ev ALICE HF e ± ALICE HF µ ± Internal : η < : y <.6 :.5<y < % - [GeV Figure ALAS 8: vs. Comarison ALICE of the Pb+Pb heavy-flavor muon measured in this analysis to similar measuremen.6.6 muons Good at forward agreement raidity (.5 < y < ) and heavy-flavor electrons at mid-raidity ( y <.6) from the AL Collaboration.. he error bars reresent. systematic and statistical uncertainties. added in quadrature. he h errors are identical between the three measurements and are excluded from the comarison ALAS HF µ ± ALICE HF e ± : η < : y <.6 arxiv: 85.5 ALICE HF µ ± :.5<y <

12 Not reviewed, for internal Not circu rev N HF muon. in Pb+Pb. RAA -% 6 8 -%.8. R AA AA 6 8-6% Not reviewed, for internal circula -% -% -% -% -% -6% ALAS HF µ ± : η < CMS D : y < ALAS Internal ALICE HF µ :.5<y < 6 8 ± % -6% for -5%.6 ± 6 8h [GeV -% -% -% -6% ALAS vs. ALICE ALAS Figure 8: Comarison of the Pb+Pb heavy-flavor muon.6 HF muon vs. CMS romt D measured in this analysis to.6 similar measuremen Figure 9: Comarison of the Pb+Pb heavy-flavor muon R.6 A charged hadrons from ALAS and the for identified D muons Good at forward agreement raidity (.5 < y < ) and heavy-flavor Similar electrons at low at mid-raidity ( y <.6) from the AL reresent. systematic and statistical uncertainties. added in q Collaboration.. he error bars reresent. systematic and statistical uncertainties. added ALAS in quadrature. HF µ : η <he h three Less measurements suression andof arehf excluded muon from at higher ± the comarison. errors are identical between the three measurements and are excluded from the comarison to left anel are for the. ALICE HF e 5% centrality interval. ± ALAS HF µ ± : η < ALAS h Figure 9: Comarison of the Pb+Pb heavy-flavor muon measured in this analysis to the for inclusive r muon R charged hadrons from ALAS and the for identified D AA measured in this analysis to similar measurements for mesons from the CMS Collaboration. he error bars reresent. systematic and statistical uncertainties added. in quadrature. he. h AA i errors are identical. eavy-flavor electrons at mid-raidity ( y <.6) from the ALICE between the atic and statistical uncertainties three measurements added inand quadrature. are excluded hefrom h AA the i comarison. he inclusive charged hadron values shown in the ents and are excluded from to left the anel comarison. are for the 5% centrality interval η < ALICE HF e ± : y < ± : η < ALAS HF µ ± ALICE.HF e ± ALICE HF µ ± , 57 nb Pb+Pb,. nb - η < , 57 nb η < =.76 ev arxiv: Pb+Pb,. nb ALICE HF µ ± - : η < : y <.6 :.5<y < : y <.6 :.5<y <

13 HF muon v in Pb+Pb v..5 Event lane Scalar roduct - % ALAS =.76 ev Pb+Pb,. nb η < - v is extracted based on event lane method, good consistency with scalar roduct method v. - % - % Combinatorial background is.5 subtracted by momentum imbalance temlate fits Significant v observed with v. - % -6 % high recisions in all centralities Figure : he deendence of the Pb+Pb heavy-flavor muon v. Results are shown for both the EP and SP methods. Each anel reresents a di erent centrality interval. he error bars and arxiv: shaded bands 85.5 reresent statistical and total uncertainties, resectively, and are shown only for the EP v. he horizontal dashed lines indicate v =.

14 HF muon and.6 vs calculations.5 RAA η < v % -6% - % AMU values for -% NN ALAS Internal -%. -6% DAA % - -6 % s.8 AMU values for -% AMU =.76 values ev NN for -%.8AMU values for -% - Pb+Pb,. nb η < % AMU value for -% -, 57 nb - Pb+Pb,. nb η <.. Data DABMod AMU Pb+Pb,. nb η < flavor muon Figure in Pb+Pb : Comarison collisions with of themeasured values redicted heavy-flavor from muon in Pb+Pb collisions with the values redicted from model. Each anel the AMU reresents transort a di erent model centrality and theinterval. DABModFor model. the Each anel reresents a di erent centrality interval. For the lotted AMU values % corresond and % to the centrality % intervals, centralitythe interval. lotted AMU values corresond to the % centrality interval. uncertainties, thefor shaded the data, bands thereresent error bars the reresent exerimental statistical systematic uncertainties, the shaded bands reresent the exerimental systematic cal uncertaintiesuncertainties, from h AA i. For and the model boxes indicate calculations theoretical bands uncertainties from h AA i. For the model calculations the bands s. N v v % v indicate the theoretical systematic uncertainties. -, 57 nb Pb+Pb,. nb.5 Data DABMod AMU - N v v v.5 - % v. v Figure 5:.5 Comarison of the Pb+Pb heavy-flavor Figure muon 5: Comarison vamu with values calculations offor the-% Pb+Pb from theavy-flavor AMU and muon DABMod v withmodels. calculations [Ge Each anel reresents a di erent centrality interval. Each anel Forreresents the AMU % a(transort di anderent % centrality model) centrality interval. describes intervals, For the the % lotted and AMU values corresond to the % centrality.5amuinterval. valuesthe corresond Forfeature the data, to the of error % data.5bars Rcentrality AA and, but shaded interval. slightly bands For reresent the data, th statistical and total uncertainties, resectively. statistical For the model and total calculations, uncertainties, the bands resectively. reresent For theoretical modelsystematic calculations, th underestimates v uncertainties. uncertainties. DABMod (energy-loss model with event-byevent fluctuations) gives a good descrition of v but underestimates at low due to incomlete modeling of low heavy-flavor % suression AMU values for -%. v.5 Not reviewed, for internal circulation o DAA DABMod AMU AMU values for -% % v v v % % v v ALAS Internal =.76 ev DABMod AMU A.5 - % AMU values for -% % arxiv: 85.5 AMU: 6 PLB 875 () 5 DABMod: PRC 96 (7) 69 - [GeV

15 Non-romt J/ψ in Pb+Pb v R Pb Nuclear modification factor.8 ALAS Non-romt J/ψ R Pb, -. < y <.5, y <. Pb+Pb, +Pb,, = 5. ev,. nb - = 5. ev, 8 nb - s = 5. ev, 5 b Correlated systematic uncer. v ALAS Preliminary Pb+Pb, = 5. ev,. nb Non-romt J/ψ, 9 < < GeV, - y < % -% -% N art Strong suression in Pb+Pb collisions, small cold nuclear v is extracted from event lane method, non-zero v observed 5 matter effects arxiv: See Jorge s talk on Monday 6:5 ALAS-CONF-8-

16 % R Non-romt J/ψ vs. HF muon % v 8 % U values for -% AA. v % -% DAA -% -% ALAS -6% DABMod values for -% s =.76 ev.8 AMU values for -% -6% AMU.8 NN -, 57 nb - % Non-romt J/ψ Pb+Pb,. nb AMU values for -% -% η <.. ALAS Internal =.76 ev Pb+Pb,. nb η < HF muon -% 6 8 R % - Not reviewed, for inter.8. v.. v 6 8 v Scalar roduct s =.76 ev.8 NN -, 57 nb Pb+Pb,. nb.6 η < Data DABMod AMU %. -6%.8 AMU values for -%.8 v.. Data DABMod AMU % Non-romt - J/ψ % HF muon -% - - v - %.. v v Figure : he deendence.6 of the Pb+Pb heavy-flavor muon v methods..5 Each anel.5. reresents a di erent centrality interval. he er and total uncertainties, resectively, and are shown only for the EP v arxiv: Figure : Comarison of the measured heavy-flavor muon in Pb+Pb collisions with the values redicted from the AMU Smiliar transort suression model and and theflow DABMod model. Each anel reresents a di erent centrality interval. For the. for HF muon and non-romt J/ψ at > 9 GeV % and % 6 8 centrality intervals, the lotted AMU values corresond to the % centrality interval. For the data, the error bars reresent statistical uncertainties, the shaded bands reresent the exerimental systematic +Pb heavy-flavor muon v with calculations from the AMU and DABMod models. arxiv: ALAS-CONF-8- uncertainties, and the boxes indicate theoretical uncertainties from h AA i. For the model calculations the bands

17 dy) Promt D yield in +Pb σ / (d d dy) [µb/gev] σ / (d d Data / heory Data / heory Data / heory Data / heory Data / heory Promt D Production < y * <. ALAS. < y * <.5 +Pb s NN Preliminary Promt D = 8.6 ev, 76. µb Production FONLL Data,. < y * < < y * < -. Data, -.5 < y * <. Data, -. < y * < -.5 Data, -.5 < y * < < y * <. FONLL Data Data Data Data,. < y * <.5, -.5 < y * <., -. < y * < -.5, -.5 < y * < < y * < < y * < < y * < Promt D with < < GeV dy) σ / (d d Data / heory Data / heory Data / heory Promt D Production < y * <.. < y * <.5 FONLL Data Data Data Data,. < y * <.5, -.5 < y * <., -. < y * < -.5, -.5 < y * < < y * < < y * < [µb] dσ dy ALAS Preliminary 8 6 Promt D Production < < GeV FONLL +Pb - = 8.6 ev, 76. µb y* Pb Data / heory FONLL rediction at 8 ev scaled by A -.5 < y Pb * < -. Data and FONLL agree within uncertainties ALAS-CONF-7-7

18 Promt D yield in +Pb Promt D R FB.8.6. ALAS Preliminary +Pb Promt D K π = 8.6 ev Forward, < y* <.5 Backward, -.5 < y* < Forward: < y* <.5, Backward: -.5 < y* < No obvious modification in forward wrt. backward for romt D 8 ALAS-CONF-7-7

19 Promt D yield in +Pb Promt D Promt D* R FB.8.6 ALAS Preliminary +Pb Promt D K π = 8.6 ev R FB.8.6 ALAS Preliminary +Pb = 8.6 ev Forward, < y* <.5 Backward, -.5 < y* <.. Promt D* D π s K ππ s Forward, < y* <.5 Backward, -.5 < y* < Forward: < y* <.5, Backward: -.5 < y* < No obvious modification in forward wrt. backward for romt D 9 ALAS-CONF-7-7

20 Promt D yield in +Pb Promt D Promt D* R FB.8.6. ALAS Preliminary +Pb Promt D K π = 8.6 ev R FB.8.6. ALAS Preliminary +Pb = 8.6 ev Promt D Non-romt J/ψ Forward, < y* <.5 Backward, -.5 < y* <.6.. Promt D* D π s K ππ s Forward, < y* <.5 Backward, -.5 < y* < Forward: < y* <.5, Backward: -.5 < y* < No obvious modification in forward wrt. backward for romt D Promt D ~ Non-romt J/ψ ALAS-CONF-7-7

21 HF muon flow in +Pb Low Multilicity High Multilicity ALAS Preliminary - =8.6 ev, 7 nb h-µ Correlations +Pb.5< h <5 GeV µ < <.5 GeV N ch rec < ALAS Preliminary - =8.6 ev, 7 nb h-µ Correlations +Pb.5< h <5 GeV µ < <.5 GeV N ch rec C( η, φ)...9 φ η - - C( η, φ)...98 φ η - - Event collected by single muon + high multilicity trigger wo article correlation between HF muon and charged hadrons ALAS-CONF-7-6

22 HF muon flow in +Pb Low Multilicity High Multilicity C( η, φ) ALAS Preliminary - =8.6 ev, 7 nb h-µ Correlations...9 φ +Pb.5< h <5 GeV µ < <.5 GeV N ch η rec < - - C( η, φ) ALAS.6 Preliminary =8.6 ev, 7 nb C( φ) a h-µ Correlations.5< φ +Pb ALAS Preliminary - +Pb =8.6 ev, 7 nb µ <5 GeV, < <6 GeV rec < η <5, N <6 C( φ) (h-µ Correlations) erih FC ( φ) + G teml C ( φ) ridge erih C ( φ) +FC () erih G + FC () ch.5< h <5 GeV µ < - <.5 GeV N ch rec η φ C( φ) ALAS Preliminary +Pb =8.6 ev, 7 nb a µ.5< <5 GeV, < <6 GeV rec < η <5, N C( φ) (h-µ Correlations) erih FC ( φ) + G teml C ( φ) ch ridge erih C ( φ) +FC () erih G + FC () - - φ Event collected by muon + high multilicity trigger wo article correlation between HF muon and charged hadrons Non-flow background subtracted with correlation temlate fit and fake HF muon background suressed with momentum imbalance cut ALAS-CONF-7-6

23 HF muon flow in +Pb b ) v (. ALAS Preliminary +Pb.5< a - =8.6 ev, 7 nb <5 GeV µ ) v (.8.6 ALAS Preliminary +Pb - =8.6 ev, 7 nb.5< rec N ch a <5 GeV h-µ Correlations.5..5< b <5 GeV (h-h < µ Correlations) <6 GeV (h-µ Correlations) rec N ch µ No obvious multilicity deendence of HF muon v v (HF muon) ~.6 v (hadron) ALAS-CONF-7-6

24 D* meson flow in +Pb C (Δφ) ALAS Preliminary +Pb C (Δφ) = 8.6 ev erih (Δφ) g + f C teml C (Δφ) ridge C (Δφ) + f C erih () < N ch < 6 Simultaneous fit C (Δφ).6 ALAS Preliminary.. +Pb C (Δφ) = 8.6 ev erih (Δφ) g + f C teml C (Δφ) ridge C (Δφ) + f C erih () 6 < N ch < Simultaneous fit v, = 8.5 ±.(stat) ±.(syst) Δφ v, =. ±.6(stat) ±.(syst) Δφ emlate fit erformed to background subtracted correlation function, result favors v, > ~σ hint for cos(δφ) azimuthal modulation of D* Imroved final results of D meson v n will be available soon ALAS-CONF-7-7

25 Summary Large system: significant suression and flow of all heavy flavor robes Small system: no net modification on heavy flavor roduction at mid-raidity / high, but significant HF muon flow is observed 5

26 Summary Large system: significant suression and flow of all heavy flavor robes Small system: no net modification on heavy flavor roduction at mid-raidity / high, but significant HF muon flow is observed System size Energy loss? Collectivity 6

27 Summary Large system: significant suression and flow of all heavy flavor robes Small system: no net modification on heavy flavor roduction at mid-raidity / high, but significant HF muon flow is observed System size Energy loss? Collectivity Crucial to have simultaneous theoretical descritions on HF yield and flow in large system and small system 7

28 ALAS detector Inner Detector η <.5 By J. Goodson 8 Calorimeter η <.9 Muon Sectrometer η <.7

29 Heavy flavor robes in ALAS HF muons Momentum imbalance dn µ dδ/ N µ 8 Pb+Pb -6% ALAS Simulation =.76 ev 6 signal background signal background 5 < < 6 GeV η < Δ = - ( MS + Calo ) temlate fit Δ/ Inner Detector Calorimeter Muon Sectrometer Signal μ Punch-through Late K/π decay μ 9 Calo MS arxiv: 85.5

30 HF muon yields in Pb+Pb Signal fraction Yields Signal fraction Signal fraction ALAS -% =.76 ev Pb+Pb,. nb. η < 6 8 -% - Signal fraction Signal fraction Signal fraction -% -6% s =.76 ev -, 57 nb η < -% N HF µ d ] - GeV [nb dη d N evt AA 5 9 =.76 ev - % ( ) - Pb+Pb,. nb - % ( ) 8 - % ( ) -, 57 nb - % ( ) ALAS η < - 6 % ( scaled ) Figure 6: he deendence of the measured Pb+Pb heavy-flavor muon di erential er-event yields for di erent centrality intervals scaled by the corresonding h AA i. Also shown is the measured heavy-flavor muon di erential cross-section. For clarity, the results for the di erent centralities are multilied by scale factors that are indicated in the legend. he cross-section is re-lotted multile times, as dashed lines, multilied by these scale factors, for comarison with the results for the di erent Pb+Pb centralities. he error bars and shaded bands reresent statistical and systematic uncertainties, resectively, and in many cases are too small to be seen. ALAS =.76 ev ALAS arxiv: 85.5 =.76 ev Pb+Pb,. nb - -

31 HF muon v in Pb+Pb v. - %.. ALAS =.76 ev Pb+Pb,. nb η < ALAS HF µ ± η < - ALICE HF e ± y <.7 ALICE HF µ ±.5<y< Good agreement between ALAS and v. - % - % ALICE values for -% ALICE. Smaller uncertainties of ALAS results. would rovide tight constraints on models v. - %. ALICE values for -% -6 % arxiv: 85.5

32 HF muon in vs FONLL σ HF µ d ] - GeV [nb dη d ALAS s =.76 ev -, 57 nb η <,.76 ev FONLL(CEQ6.6) FONLL(CEQ6.6) bottom only FONLL(CEQ6.6) charm only σ /σ FONLL σ b /σ c From FONLL 6 8 Figure 5: o anel: the deendence of the measured heavy-flavor muon cross-section in s =.76 ev collisions. he data oints are lotted at the average muon within a given interval. he vertical bars and bands on the data oints indicate statistical and systematic uncertainties, resectively. he cross-section for heavy-flavor decays from FONLL calculations is also shown, along with the individual contributions from bottom and charm quarks. For the FONLL calculations, the vertical width of the band reresents theoretical systematic uncertainties. Middle anel: the ratio of the measured and FONLL cross-sections integrated over each interval. Statistical and arxiv: 85.5

33 HF muon yields wrt. event lane ) dn µ d( φ-ψ. ALAS =.76 ev Pb+Pb,. nb - ) dn µ d( φ-ψ. ALAS =.76 ev Pb+Pb,. nb - N µ N µ.9 -% < <.5 GeV η <.9-6% < <.5 GeV η < φ - Ψ φ - Ψ ) dn µ d( φ-ψ. ALAS =.76 ev Pb+Pb,. nb - ) dn µ d( φ-ψ. ALAS =.76 ev Pb+Pb,. nb - N µ -% 8 < < GeV η < φ - Ψ N µ -6% 8 < < GeV η < φ - Ψ arxiv: 85.5

34 HF muon flow in Pb+Pb v v v % ALAS =.76 ev Pb+Pb,. nb η < DAA - v. - %..... ALAS =.76 ev Pb+Pb,. nb η < DAA - v.. - % DABMod - % %.. DABMod %. v v... v.5 - % -6 % % -6 %.5 v v Measured HF muon v and v agrees DABMod calculations arxiv: 85.5

35 D reconstruction rigger selection MinBias (+HM for correlation) wo tracks, > GeV π and K masses assigned in turn,.7 < m(kπ) <. GeV D selection Vertex robability Pointing angle cosα xy L xy / σ(l xy ) A selected D vertex D* selection An additional track (π mass), same charge with the π in D with soft ion > MeV (for yield) or 5 MeV (for correlation).75 < m(kπ) <.96 GeV as SR, m(kπ) <.76 GeV m(kπ) >.96 GeV as CR 5

36 Cross sections [µb] dσ dy ALAS Preliminary 8 6 Promt D Production < < GeV FONLL +Pb - = 8.6 ev, 76. µb Promt D [µb] dσ dy Promt D* Production ALAS Preliminary < FONLL < GeV +Pb - = 8.6 ev, 76. µb Promt D* FONLL uncertainties renormalisation scale factorization scale charm quark mass df y* y* 6 Promt D ( < < GeV) and romt D* (5 < < GeV) y lab (D) <. for better mass resolution -.5 < y* <.5 FONLL (fixed-order next-leading-logarithm) rediction extraolated from 7 and 8 ev calculates, and scaled by 8 Relatively small modification in +Pb ALAS-CONF-7-7

37 Cross sections dy) [µb/gev] σ / (d d ALAS Preliminary 5 FONLL Data Data Data Data +Pb s NN - = 8.6 ev, 76. µb Promt D* Production,. < y * <.5, -.5 < y * <., -. < y * < -.5, -.5 < y * < -. Data and FONLL are comarable in whole kinematic range Relatively small modification in +Pb Data / heory Data / heory -.5 < y * <.. < y * <.5 -. < y * < Promt D* Data / heory -.5 < y * <

38 Recoil jet bias estimation v..5 Event lane v Jet-bias - % ALAS =.76 ev Pb+Pb,. nb η < - v. - % - %.5 v. - % -6 % Figure 8: he deendence of the Pb+Pb heavy-flavor muon v. Each anel reresents a di erent centrality interval. he error bars and shaded bands reresent statistical and total uncertainties, resectively. he horizontal continuous lines indicate the jet bias on the v estimated using the data-overlay MC. Half of the estimated bias is used as a correction to the measured v and half is used as a systematic uncertainty (Section.5). he horizontal dashed lines indicate v =.

39 emlate fits μ-h in +Pb C( φ) ALAS Preliminary +Pb =8.6 ev, 7 nb a µ.5< <5 GeV, < <6 GeV rec < η <5, 6 N <8 ch C( φ) (h-µ Correlations) - C( φ).8.6. ALAS Preliminary +Pb =8.6 ev, 7 nb a µ.5< <5 GeV, < <6 GeV rec < η <5, N < ch C( φ) (h-µ Correlations) -.. erih FC ( φ) + G teml C ( φ) ridge erih C ( φ) +FC () erih G + FC (). erih FC ( φ) + G teml C ( φ) ridge erih C ( φ) +FC () erih G + FC () C( φ) ALAS Preliminary +Pb =8.6 ev, 7 nb a µ.5< <5 GeV, < <6 GeV rec < η <5, N <6 C( φ) (h-µ Correlations) erih FC ( φ) + G teml C ( φ) ch - φ C( φ) ALAS Preliminary +Pb =8.6 ev, 7 nb a µ.5< <5 GeV, < <6 GeV rec < η <5, N C( φ) (h-µ Correlations) erih FC ( φ) + G teml C ( φ) ch - φ ridge erih C ( φ) +FC () erih G + FC ().99 ridge erih C ( φ) +FC () erih G + FC () φ.97 - φ 9

40 Systematics for mu-h correlation Choice of eriheral bin -, -, -, -, - Background muons v..5 ALAS Preliminary +Pb =8.6 ev, 7 nb h-µ Correlations - rec N ch.5< h <5 GeV µ < <6 GeV emlate Fits Fourier ransform Efficiency correction. rack/muon selection.5 Pileu Accetance η systematics for muon-hadron correlation

41 D*-hadron correlation ALAS-CONF-7-7 Signal Region D*-h correlation Weighted Events /.5 MeV ALAS Preliminary +Pb = 8.6 ev Data Fit (±) D * Signal Bkg -.5 < y* <.5 χ /ndof =. 5. < < 6. GeV.75 < m(k π) <.96 GeV Sideband Region C(Δφ) ALAS Preliminary +Pb = 8.6 ev Side Bands Before subtraction After subtraction trk > 5 MeV < N ch Δη >. < 8 h-h correlation m(kππ) - m(kπ) [MeV] Δφ Event collected by MinBias and high multilicity triggers hird soft ion from D* decay with > 5 MeV for larger D* fiducial volume ( < < GeV and -.5 < y* <.5 ) Charged articles >.5 GeV, Δη > for more statistics for PC Using sideband region 5 < Δm < 7 MeV to estimation the background correlation function

42 D*-h correlation fit Assuming weak multilicity deendence of near-side D*-h long range correlation Periheral reference bin < N ch < 8 Simultaneous temlate fit method alied to low and high N ch single correlation functions C (Δφ) ALAS Preliminary +Pb = 8.6 ev -.5 < y* <.5 < < GeV C Fit (Δφ) trk D*-h Correlation < N ch < 8 > 5 MeV, Δη > Δφ C (Δφ). ALAS Preliminary Pb C (Δφ) = 8.6 ev erih (Δφ) g + f C teml C (Δφ) ridge C (Δφ) + f C v, = 5. ± erih () 8.5(stat) ± 8 < N ch < Simultaneous fit.9(syst) Δφ

43 Sideband subtraction C( ; Signal) = f sig {C( ; Signal + Background) ( f sig )C( ; Sideband)} is the D signal fraction inside the signal region, which is extracted from m fit as Systematics: C(Δφ).5..5 ALAS Preliminary +Pb = 8.6 ev Side Bands Before subtraction After subtraction trk > 5 MeV < N ch Δη >. < 8 C(Δφ).5..5 ALAS Preliminary +Pb = 8.6 ev Side Bands Before subtraction After subtraction trk > 5 MeV 8 < N ch Δη >. < Statistical uncertainty in f sig N ch deendence of f sig Δm deendence of sideband correlation Δφ Δφ