Quick jet study updates Jin - PowerPoint Presentation

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Quick jet study updates

Jin

Huang (BNL

)

Slide2

Differentiative analyzing power to collisional and radiative energy loss of high energy parton in QGPProbing kinematics and production channels of

b

-quarkb-jet tagging simulated in full Geant4Further correlation analysis to go beyond simple RAA: di-b-jet, b-jet-HF-mesonAnalysis note (half-way in revision, need to complete): https://www.phenix.bnl.gov/phenix/WWW/publish/jinhuang/sPHENIX/sPH-HF-2017-001-v1.1.pdf

HF TG Meeting

Jin Huang <jhuang@bnl.gov>

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b-jet studies

b

-jet tagging (Haiwang, Sanghoon)

Inclusive

b

-jet RAA

Di-

b-jet correlation (Darren)

b-jet-D-meson correlation (Xuan)

Slide3

From the MVTX Director’s review, we were also recommended to make projection for b-jet v2In mid-central events, probing path-length dependent energy loss for b-quark

In connection to B-meson and light flavor jet v2

HF TG MeetingJin Huang <jhuang@bnl.gov>3Event plane correlation with b-jet

sPH-HF-2017-002-v1

arXiv:1501.06197 [

nucl

-ex]

Slide4

LHC data:ALICE: Charge-jet, 30<pT<100 GeV

ATLAS: calorimetry jet

, 50<pT<150 GeVFew – 10% v2 in mid-central eventsChallenges: subtraction of event plane-dependent background HF TG MeetingJin Huang <jhuang@bnl.gov>

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Current jet v2 data

10.1016/j.physletb.2015.12.047

Slide5

Based on the same simulation setup as RAA simulation (PYTHIA8 + CTEQ6L)Two event plane resolution assumptions:Res = 0.4: Event plane detector covering 3<|eta|<4, citing the PHENIX BBC event plane resolution (20-30%C)

Res = 0.7: TPC event plane |eta|<1, citing STAR TPC event plane resolution (0-80%C)

Plot macro in GitHub: https://github.com/sPHENIX-Collaboration/analysis/blob/master/HF-Jet/TruthGeneration/macros/Draw_HFJetTruth.C HF TG MeetingJin Huang <jhuang@bnl.gov>

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b-jet v2 projection

Event plane detector covering 3<|eta|<4

TPC event plane |eta|<1

Slide6

Completing addressing comments of 1st analysis note: https://docs.google.com/document/d/1aC-Dgu4hT0OWtnOwQa1n0px-_

nI83twqWZDqxsui68U/edit?usp=sharing

Recommendation from director’s reviewTheory curves: contacting multiple theory groups to ensemble uncertainty bands of current models. Quoting uncertainty in Ivan’s calculationPresenting plots: apply same style to b-jet B-meson plotsHighlights from our TODO list on wiki: https://wiki.bnl.gov/sPHENIX/index.php/Heavy_Flavor_Topical_Group#Study_plans Update b-jet tagging simulation with laddered detector model and + calorimetry – Haiwang, Sanghoon

Fast simulation to allow large fake jet simulation – Help neededdi-b-jet purity/efficiency in Geant4 – Darren, Haiwang

Completing purity estimation for the B-meson-b-jet correlation – XuanNew topics: e.g. charmed jets

HF TG Meeting

Jin Huang <jhuang@bnl.gov>

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Jet simulation path forward

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Extra Information

HF TG Meeting

Jin Huang <jhuang@bnl.gov>

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Slide8

HF TG Meeting

Jin Huang <jhuang@bnl.gov>

8PHENIX Event plane resolutionPHENIX/Analysis Note 1092

Slide9

Cesar da Silva (LANL) working with Ivan Vitev’s group updating pQCD

calculation

of [Phys.Lett. B726 (2013) 251-256 ] to sPHENIX kinematicsHF TG MeetingJin Huang <jhuang@bnl.gov>9b

-jet theory updates for sPHENIX

Phys

. Lett

. B726 (2013)

251-256

Phys.Rev.Lett. 113 (2014) no.13,

132301

Slide10

Many appreciation of the hard work of tracking team [see Tony’s talk]Strong connection in analyzers and tracking developers Focus from HF topical group:

Efficiency down to ~1 GeV/c

- multi-track displaced vertexLow fake DCA tail - rare signal of HF decayDCA resolution- differentiate of HF decayHF TG MeetingJin Huang <jhuang@bnl.gov>

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Strong connection to tracking dev.

Slide11

HF TG Meeting

Jin Huang <jhuang@bnl.gov>

11Past activities: b-jet tagging – High DCA track counting

Short history

Dennis and Haiwang implemented track counting tagger in the full Geant4 simulation

Haiwang produced projection plot in

Geant4 simulation.Systematically validating the Geant4-based track fit procedure, in order to optimize 3-D DCA and

likelihoodReevaluate in HI background with HIJING embeddingNextUse new tracking simulation and pattern recognition

Fast sim in

sPHENIX Proposal

Full Geant4

Sim: p+p Embedded to Central

AuAu

From

Haiwang’s talk https://indico.bnl.gov/conferenceDisplay.py?confId=1926

Slide12

Realistic implementation in Geant4Completed

:

implement ladder structure in simulation – Tony F., Gaku M.Completed : digitization of MAPS detector - Tony F.On-going: Update tracking performance plots for MAPS, DCA and dp/p resolutiosn - Tony F.By summer (?): complete the pile-up simulation framework – Mike M., Yorito Y.

b-jet tagging algorithmBy summer, help needed

 : Investigating full-detector fast simulation for b-jet simulation. Look into general packages e.g. DELPHES.

On-going, developing: It will be very useful to use new in-development pattern recognition software to bring back hit collection efficiency.

By summer: Full calorimetry simulation with secondary vertexing tagger – Sanghoon L.

By summer: Full calorimetry simulation with high-DCA track counting – Haiwang Y.

HF TG MeetingJin Huang <jhuang@bnl.gov>

12Summary 1: technical performances:

Slide13

Differential sensitivity of energy loss mechanism and accessing QGP transportation propertiesUpdate non-prompt D meson performance projection

Completed

: update the Rcp and v2 plot with more realistic simulations for MB and peripheral collisions - Xin D., Xiaolong C.Explore complimentary B-hadron channels beyond non-prompt-DCompleted : exclusive B->D pi - Xin D., Xiaolong C.By summer, help needed: B->non-prompt J/Psi->e+/e

- and p+p triggeringInclusive b-jet R

AAOn-going, first results

: Update theory curve to RHIC energy – Cesar da S. working with Vitev

groupCompleted : Update

RAA plotdi-b-jet asymmetryOn-going

: Extract di-jet purity from Geant4 simulation - Haiwang Y.Deliverable : Apply di-jet purity to projection – Darren M., Haiwang Y.b-jet-non-prompt-D

asymmetry:On-going: Produce uncertainty projection in fast simulation – Xuan L

.HF TG Meeting

Jin Huang <jhuang@bnl.gov>

13Summary 2: Physics performances

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HF-hadron chemistry: e.g. high stat.

Λ

c, to study HQ hadronization HF-meson correlations, e.g. D-D_bar azimuthal correlations, to enhance sensitivity to HQ-medium interaction; enhance M/pT ratio scale comparing to D-b-jet correlation. Explore b-jet substructure tools: Exercise jet-grooming algorithm, FF. – in collaboration with Jet Structure group

Tagging gluon splitting via multi-decay vertex in inclusive b-jets.  Explore

Charmed-quark jet:charm fragmentation, completes mass hierarchy. Select D meson formed late in formationTry

out prompt-D tagger (ALI-PREL-117896) and Corrected Secondary vertex (arXiv:1612.08972). ( Sanghoon/Xuan expressed interests )

Explore tagged D-meson in correlation with opposite hard structureTagging initial c-quark kinematics with correlations, including D-meson - jet correlation and D-meson - photon correlation

Study D-FF and formation of D-mesonFurther b-jet tagging developments

Try different strategy: Soft-lepton taggingOptimize analysis methods: likelihood analysis and machine learning toolTriggering of B-mesons in p+p collisions

B->J/Psi ->e+/e-, EMCal trigger. Exploration work by Sasha L.D meson calorimetry trigger, turn on.

Large DCA triggers? HF TG Meeting

Jin Huang <jhuang@bnl.gov>

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Additional study wish listHelp (always) wanted

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HF TG Meeting

Jin Huang <jhuang@bnl.gov>

15An vulnerability (opportunity

) of HF-probes

Lund String,

Eur

. Phys. J. C 17, 137–161 (2000)

CMS,

Phys.Rev.Lett

. 113 (2014

)

Phys.Lett

. B726 (2013) 251-256

sPHENIX scientific proposal

Slide16

Event topology to select b-quark jetb

-jet in correlation with opposite-going

B-hadron, b-jet and photonsPHENIX provides good acceptance on b-di-jet and b-jet – non-prompt-D correlations Helps on purity of jet and b-tagging too

HF TG Meeting

Jin Huang <jhuang@bnl.gov>

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b-quark jet selection:

b-jet correlation

CMS PAS HIN-16-005

Physics Letters B750 (

2015

) 287–293

sPHENIX scientific proposal

b di

-jet, CMS 2016

b

-jet +

B

-hadron, model

di

-jet acceptance in sPHENIX

Slide17

HF TG MeetingJin Huang <jhuang@bnl.gov>

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Di-b-jet asymmetry: sPHENIX projection

CMS-HIN-16-005

On-going sPHENIX projection

By Darren

McGlinchey (

UCB/LANL)Pythia8 (HardQCDBBar)

Fast sim. (truth jets)Assuming di-b-jet tagging perf.Efficiency 50%High purity (100%)

RAA = 0.6 assumed sPHENIX proposal lumi

. (100B MB)

Slide18

Xuan Li (LANL) also started investigation of correlation of b-jet in correlation of a non-prompt D

0

-meson (→pi + K)Goal: tag initial quark energy + vector for non-prompt D measurements, probe b-quark energy loss and fragmentation; access to lower zj cut-off comparing to di-b-jets correlation; help purity of b-quark-jet taggingHF TG MeetingJin Huang <jhuang@bnl.gov>

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Hadron – b-jet balance

Updates in simulation

meetings:https://

indico.bnl.gov/conferenceDisplay.py?confId=2684

Phys.Lett. B750 (2015) 287-293

4

0B 0-10% Au+Au, R

AA= 0.6

175 pb

-1

p+p

Slide19

Xuan Li (LANL) also started investigation of correlation of b-jet in correlation of a non-prompt D0-meson (→pi + K)

Goal: tag initial quark energy + vector for non-prompt D measurements, probe b-quark energy loss and fragmentation; access to lower

zj cut-off comparing to di-b-jets correlation; help purity of b-quark-jet taggingHF TG MeetingJin Huang <jhuang@bnl.gov>19

Hadron – b-jet balance:Angular correlations

Updates in simulation

meetings:

https://indico.bnl.gov/conferenceDisplay.py?confId=2684

Transport model

calculations (D-meson)

S.S.Cao et al, PRC 92 (2015) 054905

(Not observed)

Pythia distribution scaled to stat. of

40B 0-10% Au+Au

events,

Eff

Jet

=0.5,

Eff

D

=0.6

(Observable)

Slide20

Jet structure tool developed in HEP adapted in HI fieldJet

grooming observable

zg to separate b-quark jet and

jet?

Mid-term goals: in collaborate with JS TG

in developing grooming tools – volunteer welcomed!

 

HF TG Meeting

Jin Huang <jhuang@bnl.gov>

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More ideas on b-quark jet selection? Jet structure tools

Earliest splitting:

More symmetric for

jet?

 

b

-quark jets ??

jet

??

A+A Modification would enhance z

g

~0.5 (i.e.

less suppressed)?

 

CMS-PAS-HIN-16-006,

inclusive jet

p

+

p

5.02

TeV

Slide21

HF-jet are based on jet, relying on jet finding development lead by JS TGEmphasis on purity and reach to

lowest-possible-

pT jet, where mass effect is maximizedNo statistics for b-jet beyond pT > 50 GeV/cHF-jet specific: response in detector for b-favored jet, unfolding and media modificationRequire join study with JS TG in term of experience and toolkit developments

HF TG Meeting

Jin Huang <jhuang@bnl.gov>

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Jet finding and fake rejections

Challenging in purity

 

sPHENIX scientific proposal