Jet fragmentation study with particle correlations from the ALICE experiment at the LHC
|
|
- Sybil Murphy
- 6 years ago
- Views:
Transcription
1 Jet fragmentation study with particle correlations from the ALICE experiment at the LHC Dong Jo,Kim University of Jyväskylä & Helsinki Institute of Physics for the ALICE Collaboration NN5, Catania, Italy June -6
2 Motivations Introduction Particle correlation measurements are good tools to Study the jet properties in pp Probe jet medium interactions in Heavy Ion collisions(di-hadron Tomography) dn h dξ Ξ,Τ OPAL, s 9 9 GeV in vacuum, Ejet GeV in medium, Ejet GeV TASSO, s 4 GeV in vacuum, Ejet 7 GeV in medium, Ejet 7 GeV Ξ ln x R AA - ALICE, Pb-Pb, ALICE (-5%) CMS (-5%) s NN =.76 TeV charged particles, η <.8 HT (Chen et al.) lower density HT (Chen et al.) higher density HT (A.M.) ASW (T.R.) YaJEM-D (T.R.) elastic (T.R.) large P esc elastic (T.R.) small P esc WHDG (W.H.) π lower limit WHDG (W.H.) π upper limit 4 5 p (GeV/c) T Figure : ξ = ln [/z], N. Borghini, U.A Wiedemann arxiv:hep-ph/568. Modification of the Fragmentation Function in Heavy Ion collisions Figure : Strong single particle suppression R AA (p T ) = (/Nevt AA ) d N ch AA /dηdp T N coll (/N evt pp ) d N pp ch /dηdp T Dong Jo,Kim (JYFL/HIP) Jet fragmentation study from ALICE at LHC /
3 Motivations Introduction Particle correlation measurements are good tools to Study the jet properties in pp Probe jet medium interactions in Heavy Ion collisions(di-hadron Tomography) dn h dξ Ξ,Τ OPAL, s 9 9 GeV in vacuum, Ejet GeV in medium, Ejet GeV TASSO, s 4 GeV in vacuum, Ejet 7 GeV in medium, Ejet 7 GeV Ξ ln x Figure : ξ = ln [/z], N. Borghini, U.A Wiedemann arxiv:hep-ph/568. Modification of the Fragmentation Function in Heavy Ion collisions Figure : CMS, Phys. Rev. C 84, 496 () Strong Dijet Energy Asymmetry A J = p T, p T, p T, + p T, Dong Jo,Kim (JYFL/HIP) Jet fragmentation study from ALICE at LHC /
4 Motivations Introduction Particle correlation measurements are good tools to Study the jet properties in pp Probe jet medium interactions in Heavy Ion collisions(di-hadron Tomography) dn h dξ Ξ,Τ OPAL, s 9 9 GeV in vacuum, Ejet GeV in medium, Ejet GeV TASSO, s 4 GeV in vacuum, Ejet 7 GeV in medium, Ejet 7 GeV Ξ ln x Analysis of high-e T jets (ATLAS, CMS) /N jet dn track / dξ PbPb / pp CMS, PbPb, s NN =.76 TeV, L int anti-k T (R =.) PF Jets p > GeV/c, p > 4 GeV/c T, T, φ > π, Tracks in cone ( R <.) p track >4 GeV/c T Centrality -% Centrality -% ξ = ln(/z) - = 6.8 µb /N jet dn track / dξ PbPb / pp (a) Leading Jet pp reference Subleading Jet pp reference (c).5.5 Centrality -% Leading Jet Subleading Jet Centrality -% (b) (d) ξ = ln(/z) Figure : ξ = ln [/z], N. Borghini, U.A Wiedemann arxiv:hep-ph/568. Modification of the Fragmentation Function in Heavy Ion collisions Figure : CMS(JHEP () 87) No indication of modification of the fragmentation function, pt track > 4 GeV/c track cut. Dong Jo,Kim (JYFL/HIP) Jet fragmentation study from ALICE at LHC /
5 Motivations Introduction Particle correlation measurements are good tools to Study the jet properties in pp Probe jet medium interactions in Heavy Ion collisions(di-hadron Tomography) dn h dξ Ξ,Τ OPAL, s 9 9 GeV in vacuum, Ejet GeV in medium, Ejet GeV TASSO, s 4 GeV in vacuum, Ejet 7 GeV in medium, Ejet 7 GeV Ξ ln x Analysis of high-e T jets (ATLAS, CMS) /N jet dn track / dξ PbPb / pp CMS, PbPb, s NN =.76 TeV, L int anti-k T (R =.) PF Jets p > GeV/c, p > 4 GeV/c T, T, φ > π, Tracks in cone ( R <.) p track >4 GeV/c T Centrality -% Centrality -% ξ = ln(/z) - = 6.8 µb /N jet dn track / dξ PbPb / pp (a) Leading Jet pp reference Subleading Jet pp reference (c).5.5 Centrality -% Leading Jet Subleading Jet Centrality -% (b) (d) ξ = ln(/z) Figure : ξ = ln [/z], N. Borghini, U.A Wiedemann arxiv:hep-ph/568. Modification of the Fragmentation Function in Heavy Ion collisions Figure : CMS(JHEP () 87) No indication of modification of the fragmentation function, p track T = 4 GeV/c ξ Dong Jo,Kim (JYFL/HIP) Jet fragmentation study from ALICE at LHC /
6 Motivations Introduction Particle correlation measurements are good tools to Study the jet properties in pp Probe jet medium interactions in Heavy Ion collisions(di-hadron Tomography) Analysis of high-e T jets (ATLAS, CMS) dn h dξ Ξ,Τ OPAL, s 9 9 GeV 4 in vacuum, Ejet GeV in medium, Ejet GeV TASSO, s 4 GeV in vacuum, Ejet 7 GeV in medium, Ejet 7 GeV Ξ ln x Figure : ξ = ln [/z], N. Borghini, U.A Wiedemann arxiv:hep-ph/568. Modification of the Fragmentation Function in Heavy Ion collisions /N jet dn track /dξ PbPb/pp CMS PbPb s NN =.76 TeV 5 μb 7 % 5 7% PbPb pp reference data 5% <p jet < GeV/c T. < η jet < % p track T > GeV/c,R <. % ξ = ln(/z) ξ = ln(/z) ξ = ln(/z) ξ = ln(/z) ξ = ln(/z) Figure : CMS(PRC 9 (4) 498) Indication of modification of the fragmentation function, p T,h > GeV/c, p T,h = GeV/c ξ 4.5 for GeV jet Dong Jo,Kim (JYFL/HIP) Jet fragmentation study from ALICE at LHC /
7 Motivations Introduction Particle correlation measurements are good tools to Study the jet properties in pp Probe jet medium interactions in Heavy Ion collisions(di-hadron Tomography) Figure : Broadening in a static medium.longitudinal flow results in deformation of the conical jet shape Figure : Néstor Armesto, Carlos A. Salgado and Urs Achim Wiedemann, PhysRevLett.9.4 (4 < p T,trigg < 6 < p T,assoc < 4 GeV/c) Dong Jo,Kim (JYFL/HIP) Jet fragmentation study from ALICE at LHC /
8 Motivations Introduction Particle correlation measurements are good tools to Study the jet properties in pp Probe jet medium interactions in Heavy Ion collisions(di-hadron Tomography) Objectives Study modification of the jet shape and associated yields Increase of width (radiation) Increase of eccentricity (longitudinal flow) Study dependence on p T jet quenching effects expected to be strongest a low p T need to measure down to lowest possible p T ALICE is capable of measuring low p T particles and their PID Figure : Néstor Armesto, Carlos A. Salgado and Urs Achim Wiedemann, PhysRevLett.9.4 (4 < p T,trigg < 6 < p T,assoc < 4 GeV/c) Dong Jo,Kim (JYFL/HIP) Jet fragmentation study from ALICE at LHC /
9 Analysis ALICE Detectors Centrality determination by V( N ch with scintillators in.8 < η < 5. and.7 < η <.7) Tracking - TPC tracks constrained to the primary vertex and full azimuthal acceptance ( η <.9) Dong Jo,Kim (JYFL/HIP) Jet fragmentation study from ALICE at LHC /
10 Analysis Jet Properties from two particle correlation function N trigg d N assoc d φd η () φ = φ trigg φ assoc ( η = η trigg η assoc ) in a given p T,trigg and p T,assoc bins Normalized by the number of trigger particles in a given p T,trigg bin Near-side( φ, η = ) and Away side( φ = π) peaks are reminiscent of back-to-back parton production (Jets) Dong Jo,Kim (JYFL/HIP) Jet fragmentation study from ALICE at LHC 4 /
11 Analysis Analysis Details Event sample 5M Pb-Pb events at s=.76 TeV in LHC run 55M pp events at s=.76 TeV in LHC run Track selection benefits from uniform φ acceptance of TPC η <.9 Event mixing corrects for two-track acceptance in bins of centrality and vertex position Per-trigger yields corrected for tracking efficiency and contamination same event pairs (a.u.) η ALI PERF ϕ (rad.) mixed event pairs (a.u.) η ϕ (rad.) Figure : Left: Same Events, Right: Mixed Events Dong Jo,Kim (JYFL/HIP) Jet fragmentation study from ALICE at LHC 4 /
12 Analysis Backgrounds in Correlation function in Heavy Ion collisions At low p T, correlations are dominated by collective effects (v, v,...) This background at low p T is well constrained by large η gap correlation method (Phys.Lett. B78 () 49-64) dn d φ dn + Σvncos n(φ ψn), single () dφ trig + Σvn vn assoc cos(n φ), pairs () Consistent results with event plane method(alice,arxiv:5.576) (a) Correlation function η >.8 Dong Jo,Kim (JYFL/HIP) Jet fragmentation study from ALICE at LHC 5 /
13 Results Jet Shapes in low p T, Broadening Near-Side Peak Shapes Can we see modification of the near-side peak? Dong Jo,Kim (JYFL/HIP) Jet fragmentation study from ALICE at LHC 6 /
14 Results Jet Shapes in low p T, Broadening Near-Side Peak Shapes Can we see modification of the near-side peak? Estimate η-independent effects (e.g. flow) by studying the long-range correlation region ( η > ) 4 GeV/c < p < 8 GeV/c GeV/c < p < GeV/c % dn assoc /d ϕ (/rad.) η <.. < η <.6 (scaled) Pb Pb.76 TeV Stat. unc. only /N trig ALI PREL ϕ (rad.) Dong Jo,Kim (JYFL/HIP) Jet fragmentation study from ALICE at LHC 6 /
15 Results Jet Shapes in low p T, Broadening Near-Side Peak Shapes Can we see modification of the near-side peak? Estimate η-independent effects (e.g. flow) by studying the long-range correlation region ( η > ) Remove from short-range region ( η < ) 4 GeV/c < p < 8 GeV/c GeV/c < p < GeV/c % dn assoc/d ϕ (/rad.) /N trig η <.. < η <.6 (scaled) Pb Pb.76 TeV Stat. unc. only ϕ (rad.) ALI PREL 4947 Dong Jo,Kim (JYFL/HIP) Jet fragmentation study from ALICE at LHC 6 /
16 Results Jet Shapes in low p T, Broadening Shape Evolution Dong Jo,Kim (JYFL/HIP) Jet fragmentation study from ALICE at LHC 7 /
17 Results Jet Shapes in low p T, Broadening Shape Evolution Dong Jo,Kim (JYFL/HIP) Jet fragmentation study from ALICE at LHC 7 /
18 Results Jet Shapes in low p T, Broadening Jet Shape Characterization Near-side peak fitted with D Gaussians shape parameters: σ η, σ φ Figure : Left:Data Middle:Fit Right:Residual Dong Jo,Kim (JYFL/HIP) Jet fragmentation study from ALICE at LHC 8 /
19 Results Jet Shapes in low p T, Broadening Near Side Peak, σ(fit) (fit) (rad.).8.7 Pb Pb s NN =.76 TeV pp s =.76 TeV η <.9 < p T,t < p T,t < < p T,a < 4 < p T,a < GeV/c < GeV/c σ η (fit).8.7 Pb Pb s NN =.76 TeV pp s =.76 TeV η <.9 < p T,t < p T,t < < p T,a < 4 < p T,a < GeV/c < GeV/c σ ϕ 4 < p T,t < 8 < p T,a < GeV/c 4 < p T,t < 8 < p T,a < GeV/c pp Centrality pp Centrality (a) σ φ (b) σ η Figure : Near side peak width No significant centrality dependence of σ φ Dependence on p T,assoc governed by j T p T,assoc σ φ Significant increase of σ η towards central events For the lowest p T bin, eccentricity ( (σ η σ φ )/ (σ η + σ φ )) increases from to. Smooth continuation from peripheral to pp Dong Jo,Kim (JYFL/HIP) Jet fragmentation study from ALICE at LHC 9 /
20 Results Jet Shapes in intermidiate p T, Narrowing I AA ( η ) and jet shape modification Analyze dn/d η (positive and corresp. negative bins are combined) Background estimated by a fit (Kaplan plus constant( parameters A,b,n,k) f ( η) = A( + b η ) n + k /N Pb Pb trig dn Pb Pb /d η p ; p I AA ( η ) = /N pp trig dnpp /d η dn/d η /N trig Pb Pb events at 8<p <5 GeV/c 4<p <6 GeV/c Centrality % s NN =.76 TeV 6/8/ η ALI PERF 776 p ; p Dong Jo,Kim (JYFL/HIP) Jet fragmentation study from ALICE at LHC /
21 Results Jet Shapes in intermidiate p T, Narrowing I AA ( η ) at high p T (8 < p < 5 GeV/c) Pb Pb events at s NN =.76 TeV I ( η ) AA I AA ( η ) 8<p <5 GeV/c 4<p <6 GeV/c Centr. % / pp 8<p <5 GeV/c 6<p <8 GeV/c Centr. % / pp 8<p <5 GeV/c 4<p <6 GeV/c Centr. 4% / pp 8<p <5 GeV/c 6<p <8 GeV/c Centr. 4% / pp 8<p <5 GeV/c 4<p <6 GeV/c Centr. 6 9% / pp 8<p <5 GeV/c 6<p <8 GeV/c Centr. 6 9% / pp ALI PREL 7759 η η η I AA shows a possible onset of jet shape modification in η (Narrowing). Dong Jo,Kim (JYFL/HIP) Jet fragmentation study from ALICE at LHC /
22 Summary Summary. Low momentum regions, the centrality and p T evolution of near-side peak shapes fitted with D Gaussians No significant centrality dependence of σ φ Significant increase of σ η towards central events. (Broadening). I AA ( η ) at high p T (8 < p < 5 GeV/c) a possible onset of jet shape modification in η (Narrowing). Perspectives These observations are intriguing and a combination of these studies seems promising PID-dependent shape, going down to lower p Ta with higher momentum trigger particles Away side correlation is under construction. Comparisons with various quenching models Dong Jo,Kim (JYFL/HIP) Jet fragmentation study from ALICE at LHC /
23 Backup Slides Dong Jo,Kim (JYFL/HIP) Jet fragmentation study from ALICE at LHC /
24 Model comparisons,near Side Peak, σ(fit) (fit) (rad.).8.7 Pb Pb s NN =.76 TeV pp s =.76 TeV η <.9 Data AMPT.5 / Pythia 6 P < p T,t < p T,t < < p T,a < 4 < p T,a < GeV/c < GeV/c σ η (fit).8.7 Pb Pb s NN =.76 TeV pp s =.76 TeV η <.9 Data AMPT.5 / Pythia 6 P < p T,t < p T,t < < p T,a < 4 < p T,a < GeV/c < GeV/c σ ϕ.6 4 < p T,t < 8 < p T,a < GeV/c.6 4 < p T,t < 8 < p T,a < GeV/c pp Centrality pp Centrality (a) σ φ (b) σ η Figure : Comparison to AMPT model AMPT (A MultiPhase Transport Code, Jun Xu, Che Ming Ko,PhysRevC.8.494) Initial conditions simulated using HIJING Parton scattering, Hadronization : String melting + Coalescence and Hadron scattering Lines are from AMPT.5 (Pb-Pb) and Pythia6 (Perugia) (pp) AMPT describes the main features of the near-side shape evolution observed in data Dong Jo,Kim (JYFL/HIP) Jet fragmentation study from ALICE at LHC /
25 I AA ( η ) at intermediate p T (6 < p Tg < 8 GeV/c).5 Pb Pb events at.5 s NN =.76 TeV.5 I ( η ) AA I AA ( η ).5 6<p <8 GeV/c <p <4 GeV/c Centr. % / pp 6<p <8 GeV/c 4<p <6 GeV/c Centr. % / pp.5 6<p <8 GeV/c <p <4 GeV/c Centr. 4% / pp 6<p <8 GeV/c 4<p <6 GeV/c Centr. 4% / pp.5 6<p <8 GeV/c <p <4 GeV/c Centr. 6 9% / pp 6<p <8 GeV/c 4<p <6 GeV/c Centr. 6 9% / pp η η η ALI PREL 478 (a) Dong Jo,Kim (JYFL/HIP) Jet fragmentation study from ALICE at LHC /
In-Medium Energy Loss and Correlations in Pb-Pb Collisions at 2.76 TeV with ALICE
In-Medium Energy Loss and Correlations in Pb-Pb Collisions at 2.76 TeV with ALICE Jan Fiete Grosse-Oetringhaus CERN/PH for the ALICE Collaboration Heavy Ions: Experiments Confront Theory Copenhagen, 8th
More informationMeasurement of inclusive charged jet production in pp and Pb-Pb
Measurement of inclusive charged jet production in pp and Pb-Pb collisions at S NN 5. 02TeV with ALICE Run2 Data Yan Li for the ALICE collaboration Central China Normal University CLHCP 2016 18/12/2016
More informationJet Physics at ALICE. Oliver Busch. University of Tsukuba Heidelberg University
Jet Physics at ALICE Oliver Busch University of Tsukuba Heidelberg University 1 2 Outline Introduction Results from pp collisions Identified jet fragmentation in pp Jets in heavy-ion collisions Jet shapes
More informationTwo-particle Correlations in pp and Pb-Pb Collisions with ALICE
wo-particle Correlations in pp and Pb-Pb Collisions with ALICE Xiangrong Zhu, Ruina Dang (for the ALICE Collaboration) Institute Of Particle Physics, Central China Normal University he 9th Chinese Physical
More informationStrangeness production and nuclear modification at LHC energies
Strangeness production and nuclear modification at LHC energies Oliver Busch for the ALICE collaboration 1 Outline introduction jet azimuthal anisotropy jet shapes 2 Introduction 3 Jets: seeing quarks
More informationMeasurement of Quenched Energy Flow for Dijets in PbPb collisions with CMS
Measurement of Quenched Energy Flow for Dijets in PbPb collisions with CMS For the CMS Collaboration NPA Seminar Yale, USA 15 October, 2015 Relativistic Heavy Ion Collisions Trying to answer two important
More informationJet Physics with ALICE
Jet Physics with ALICE Oliver Busch for the ALICE collaboration Oliver Busch Tsukuba 2014 /03/13 1 Outline introduction results from pp jets in heavy-ion collisions results from Pb-Pb collisions jets in
More informationJet fragmentation study in vacuum and in medium in the ALICE experiment at the LHC
Jet fragmentation study in vacuum and in medium in the ALICE experiment at the LHC Magali Estienne for the ALICE Collaboration WISH 2010 Catania, Italia, September 8-10 2010 Outline 2 Motivations for jet
More informationProspective of gamma hadron correlation. study in CMS experiment
Prospective of gamma hadron correlation. study in CMS experiment Yeonju Go (Korea University) for the CMS collaboration 5-6 Dec. 2014 HIM meeting Contents Physics Motivation Direct gamma-hadron correlation
More informationResults with Hard Probes High p T Particle & Jet Suppression from RHIC to LHC
Results with Hard Probes High p T Particle & Jet Suppression from RHIC to LHC PHENIX! AGS! RHIC! STAR! Cover 3 decades of energy in center-of-mass s NN = 2.76 TeV 5.5 TeV (2015) CMS LHC! s NN = 5-200 GeV
More informationJet Quenching at RHIC and LHC
Jet Quenching at RHIC and LHC Oliver Busch University of sukuba Heidelberg University 1 Nuclear modification factor Event plane dependence Semi-inclusive jet-hadron yields Jet shapes, subjets, jet mass
More informationLecture 3: jets in heavy ion collisions
Lecture 3: jets in heavy ion collisions Marco van Leeuwen, Nikhef and Utrecht University JET School, UC Davis, 9-2 June 204 Jets and parton energy loss Motivation: understand parton energy loss by tracking
More informationReview of photon physics results at Quark Matter 2012
Review of photon physics results at Quark Matter 2012 Jet Gustavo Conesa Balbastre 1/28 Why photons? Direct thermal: Produced by the QGP Measure medium temperature R AA > 1, v 2 > 0 Direct prompt: QCD
More informationarxiv: v1 [hep-ex] 18 May 2015
ALICE summary of light flavour results at intermediate and high p arxiv:55.477v [hep-ex] 8 May 5 uva Richert, on behalf of the ALICE collaboration Lund University, Department of Physics, Div. of Particle
More informationJet Properties in Pb-Pb collisions at ALICE
Jet Properties in Pb-Pb collisions at ALICE Oliver Busch University of sukuba Heidelberg University for the ALICE collaboration Oliver Busch LHC Seminar 5/216 1 Outline Introduction Jets in heavy-ion collisions
More informationThe Quark-Gluon Plasma and the ALICE Experiment
The Quark-Gluon Plasma and the ALICE Experiment David Evans The University of Birmingham IoP Nuclear Physics Conference 7 th April 2009 David Evans IoP Nuclear Physics Conference 2009 1 Outline of Talk
More informationProspects with Heavy Ions at the LHC
Prospects with Heavy Ions at the LHC The Quark-Gluon Plasma at RHIC & LHC So far at RHIC: Elliptic Flow Near-perfect Fluid High p T Suppression Strongly-coupled QGP R AA! d 2 N AA dydp T d 2 N pp!!! AA
More informationMeasurement of Inclusive Charged Jet Production in pp and Pb-Pb collisions at snn = 5.02 TeV with ALICE
1 Measurement of Inclusive Charged Jet Production in pp and Pb-Pb collisions at snn = 5.02 TeV with ALICE Hiroki Yokoyama for the ALICE collaboration LPSC, Université Grenoble-Alpes, CNRS/IN2P3 University
More information+ High p T with ATLAS and CMS in Heavy-Ion 2.76TeV
+ High p T with ATLAS and CMS in Heavy-Ion Collisions @ 2.76TeV Lamia Benhabib On behalf of ATLAS and CMS HCP 2011, Paris lamia.benhabib@llr.in2p3.fr +Outlook Introduction : hard probes Strongly interacting
More informationExploring the QGP with Jets at ALICE
Exploring the QGP with Jets at ALICE Oliver Busch University of sukuba Oliver Busch HI café, okyo 217/1 1 jets in pp collisions jets in heavy-ion collisions jet nuclear modification factor event plane
More informationJet Physics at the LHC
Jet Physics at the LHC Oliver Busch University of Tsukuba Heidelberg University 1 pp jet cross sections and fragmentation pp identified jet fragmentation Nuclear modification factor Event plane dependence
More informationPerspectives for the measurement of beauty production via semileptonic decays in ALICE
Perspectives for the measurement of beauty production via semileptonic decays in ALICE Rosario Turrisi INFN Padova (Italy for the ALICE collaboration Contents Motivation: energy loss ALICE detector highlights
More informationJet Results in pp and Pb-Pb Collisions at ALICE
Jet Results in pp and Pb-Pb Collisions at ALICE Oliver Busch for the ALICE Collaboration Motivation Jet reconstruction in ALICE Jets in pp Jets in Pb-Pb Hadron triggered recoil jets Motivation Jets originate
More informationJet quenching in PbPb collisions in CMS
Jet quenching in PbPb collisions in CMS Bolek Wyslouch École Polytechnique Massachusetts Institute of Technology arxiv:1102.1957 Orsay, February 18, 2011 1 Heavy Ions at the LHC Huge energy jump from RHIC:
More informationPoS(DIS2017)208. Nuclear PDF studies with proton-lead measurements with the ALICE detector
Nuclear PDF studies with proton-lead measurements with the ALICE detector a,b for the ALICE Collaboration a Institute for Subatomic Physics, Department for Physics and Astronomy and EMMEφ, Faculty of Science,
More informationAn introduction to medium induced gluon radiation. Edmond Iancu IPhT Saclay & CNRS
Edmond Iancu IPhT Saclay & CNRS a review of some relatively old stuff (BDMPS Z, 995) & original work with J. Casalderrey Solana (arxiv:6.3864) June 24th, 2 Motivation 2 Antenna pattern 3 BDMPS Z 4 Interference
More informationQuestions for the LHC resulting from RHIC Strangeness
Questions for the LHC resulting from RHIC Strangeness Outline Intermediate p T strangeness production not jets! (Credit for work goes to Betty Abelev & Jana Bielcikova) Helen Caines Yale University ALICE
More informationATLAS Measurements of Jets in Heavy-Ion Collisions
ALAS Measurements of Jets in Heavy-Ion Collisions Aaron Angerami, Columbia University for the ALAS Collaboration PANIC Cambridge, Massachusetts 7/8/ Jets in Heavy Ion Collisions Jets provide a powerful
More informationJET FRAGMENTATION DENNIS WEISER
JET FRAGMENTATION DENNIS WEISER OUTLINE Physics introduction Introduction to jet physics Jets in heavy-ion-collisions Jet reconstruction Paper discussion The CMS experiment Data selection and track/jet
More informationMultiplicity dependence of charged pion, kaon, and (anti)proton production at large transverse momentum in p-pb collisions at 5.
[1] Multiplicity dependence of charged pion, kaon, and (anti)proton production at large transverse momentum in p-pb collisions at 5.02 ATeV Gyula Bencedi (Wigner RCP, Hungary) on behalf of the ALICE Collaboration
More informationALICE at LHC Overview & Jet Physics LHC
ALICE at LHC Overview & Jet Physics Alice LHC Dedicated general purpose Heavy Ion experiment at LHC ALICE Collaboration ~ 1000 Members (63% - CERN States) ~ 30 Countries ~ 100 Institutes ~ 150 M CHF capital
More informationCharged jets in p Pb collisions measured with the ALICE detector
Charged jets in p Pb collisions measured with the ALICE detector (CERN) for the ALICE collaboration (25.03.2015) Rencontres de Moriond, QCD and High Energy Interactions, La Thuile Motivation for p Pb Study
More informationProton-lead measurements using the ATLAS detector
Proton-lead measurements using the ATLAS detector Martin Spousta for the ATLAS Collaboration Charles University in Prague DOI: http://dx.doi.org/10.3204/desy-proc-2014-04/275 Measurements of soft and hard
More informationLHC Heavy Ion Physics Lecture 5: Jets, W, Z, photons
LHC Heavy Ion Physics Lecture 5: Jets, W, Z, photons HUGS 2015 Bolek Wyslouch Techniques to study the plasma Radiation of hadrons Azimuthal asymmetry and radial expansion Energy loss by quarks, gluons
More informationRidge correlation structure in high multiplicity pp collisions with CMS
Ridge correlation structure in high multiplicity pp collisions with CMS Dragos Velicanu for the CMS Collaboration MBUEWG CERN, Geneva, June 17 2011 Results from High Multiplicity pp Dragos Velicanu (MIT)
More informationFirst results with heavy-ion collisions at the LHC with ALICE
First results with heavy-ion collisions at the LHC with ALICE Domenico Elia INFN, Bari (Italy) on behalf of the ALICE Collaboration D. Elia (INFN Bari, Italy) PANIC 011 / Boston, MA (USA) July 4-9, 011
More informationATLAS Results on Pb+Pb Collisions
ATLAS Results on Pb+Pb Collisions Helena Santos, LIP-Lisbon for the ATLAS Collaboration International Europhysics Conference on High Energy Physiscs, 21 27 July 2011, Grenoble Heavy Ion Physics Systematic
More informationHeavy Ion Results from the ALICE Experiment
Heavy Ion Results from the ALICE Experiment Johannes P. Wessels on behalf of the ALICE Collaboration Institute for uclear Physics University of Münster D-89 Münster, Germany and CER, CH- Geneva, Switzerland
More informationPhenomenology of prompt photon production. in p A and A A collisions
Phenomenology of prompt photon production in p A and A A collisions François Arleo LAPTH, Annecy LPT Orsay April 2011 Francois Arleo (LAPTH) Prompt γ in p A and A A collisions LPT Orsay April 2011 1 /
More informationLearning about the QGP using Jets
Learning about the QGP using Jets Raghav Kunnawalkam Elayavalli (Rutgers University) http://physics.rutgers.edu/~raghav/ Nuclear Physics Seminar Oct 31st 2016 1 What are we trying to study? 2 3 Jets! 4
More informationPhoton and neutral meson production in pp and PbPb collisions at ALICE
Photon and neutral meson production in pp and PbPb collisions at ALICE Dieter Roehrich University of Bergen, Norway for the ALICE Collaboration Nuclear collisions at the LHC Photons as a probe for the
More informationSub-hadronic degrees of freedom in ultrarelativistic nuclear collisions at RHIC and beyond
Sub-hadronic degrees of freedom in ultrarelativistic nuclear collisions at RHIC and beyond Lawrence Berkeley National Laboratory Berkeley, US 1 Introduction: Heavy Ion Physics Today t = 5 10 17 sec T=1
More informationJet and bulk observables within a partonic transport approach
Jet and bulk observables within a partonic transport approach Florian Senzel with J. Uphoff, O. Fochler, C. Wesp, Z. Xu and C. Greiner based on Phys.Rev.Lett. 4 (25) 23 Transport meeting, 29.4.25 Outline
More informationCorrelations, multiplicity distributions, and the ridge in pp and p-pb collisions
EPJ Web of Conferences, 6 (7) DOI:.5/ epjconf/76 ISMD 6 Correlations, multiplicity distributions, and the ridge in pp and p-pb collisions Alice Ohlson,a for the Collaboration Ruprecht-Karls-Universität
More informationJet quenching in pa and AA
Jet quenching in pa and AA Jefferson Lab Electron Ion Collider User Group Meeting Catholic University of America, Washington D.C, USA July 30 - August 2, 2018 Collectivity in AA and pa CMS Collaboration,
More informationExtracting ˆq from single inclusive data at RHIC and at the LHC for different centralities: a new puzzle?
Extracting ˆq from single inclusive data at RHIC and at the LHC for different centralities: a new puzzle? Carlota Andrés Universidade de Santiago de Compostela Hard Probes 2016, Wuhan, China N. Armesto,
More informationTransverse momentum and pseudorapidity distributions with minimum bias events in CMS at the LHC
Transverse momentum and pseudorapidity distributions with minimum bias events in CMS at the LHC Christof Roland/ MIT For the CMS Collaboration Rencontres de Moriond QCD Session 14 th March, 2010 Moriond
More informationOverview of experimental results in Pb-Pb collisions at s NN = 2.76 TeV by the CMS Collaboration
Overview of experimental results in Pb-Pb collisions at s NN =.76 ev by the CMS Collaboration he MI Faculty has made this article openly available. Please share how this access benefits you. Your story
More informationMeasurement of isolated-photon jet correlations with ALICE
Measurement of isolated-photon jet correlations with ALICE Denise Moreira de Godoy Laboratoire de Physique Subatomique et des Technologies Associèes (SUBATECH), Nantes, France September 17, 2014 Rencontres
More informationStudy of Dihadron Fragmentation Function Correlations in p-p collisions at 7 TeV. Derek Everett Dr. Claude Pruneau, Dr.
Study of Dihadron Fragmentation Function Correlations in p-p collisions at 7 TeV Derek Everett Dr. Claude Pruneau, Dr. Sidharth Prasad Outline Physics Motivation Definitions of Observables PYTHIA Monte
More informationMonte Carlo activities in ALICE
Monte Carlo activities in ALICE status and prospects Jochen Klein for the ALICE Collaboration CERN 8th International Workshop on Multiple Partonic Interactions at the LHC San Cristóbal de las Casas, Chiapas,
More informationusing photons in p A and A A collisions
Probing parton densities and energy loss processes using photons in p A and A A collisions François Arleo LAPTH, Annecy High p Probes of High Density QCD May 2011 Francois Arleo (LAPTH) Prompt γ in p A
More informationThe ALICE experiment at LHC. Experimental conditions at LHC The ALICE detector Some physics observables Conclusions
The ALICE experiment at LHC Experimental conditions at LHC The ALICE detector Some physics observables Conclusions ALICE @ LHC PbPb collisions at 1150 TeV = 0.18 mj Experimental conditions @LHC 2007 start
More informationMeasurement of muon tagged open heavy flavor production in Pb+Pb collisions at 2.76 TeV with ATLAS
Measurement of muon tagged open heavy flavor production in Pb+Pb collisions at 2.76 TeV with Dennis V. Perepelitsa Columbia University for the Collaboration Quark Matter 2012 Parallel 7A Washington, D.C.,
More informationJet Energy Loss at RHIC
QCD Session Jet Energy Loss at RHIC Nathan Grau Columbia University for the PHENIX Collaboration Fundamental Question in QED An early study in QED: charged particles losing energy in matter Bethe Formula
More informationProgress in the MC simulation of jets and jet quenching. Abhijit Majumder Wayne State University
Progress in the MC simulation of jets and jet quenching Abhijit Majumder Wayne State University 5th JET collaboration meeting, UC Davis, June 17-18, 2013 Outline 1) Outline of project plan 2) Concise description
More informationDihadron correlations from AMPT
Dihadron correlations from AMPT Che-Ming Ko Texas A&M University AMPT Anisotropic flows Dihadron azimuthal correlations 2D dihadron correlations Based on work with Jun Xu, PRC 83, 021903(R) (2011); 034904
More informationLecture 2: Single and di-hadron measurements and energy loss modelling
Lecture 2: Single and di-hadron measurements and energy loss modelling Marco van Leeuwen,! Nikhef and Utrecht University Helmholtz School Manigod! 17-21 February 2014 From RHIC to LHC RHIC LHC RHIC: n
More informationMultiplicity distributions for jet parton showers in the medium
Multiplicity distributions for jet parton showers in the medium Nicolas BORGHINI in collaboration with U.A. WIEDEMANN CERN N. BORGHINI, Multiplicity distributions for jet parton showers in the medium p.1/17
More informationJets, flows and Joseph Fourier
Jets, flows and Joseph Fourier Tom Trainor December, Guy Paić Fest Puebla, Mexico Diverse Phenomena Secret Analogies Mathematics compares the most diverse phenomena and discovers the secret analogies that
More informationEnergy Loss in Deconfined Matter. 24. Februar 2013 TUD Julius Gronefeld 1
Energy Loss in Deconfined Matter 24. Februar 2013 UD Julius Gronefeld 1 Structure A brief glimpse at theory Jets and jet quenching Heavy flavor quarks Summary 24. Februar 2013 UD Julius Gronefeld 2 Introduction
More informationALICE results in p Pb collisions at the LHC
ALICE results in p Pb collisions at the LHC Diego Stocco for the ALICE Collaboration (Ecole des Mines, CNRS-INP3, Université de Nantes) Nantes, France Outline Motivation Goal p Pb collisions Experimental
More informationRecent Jet Results from the CMS experiment
Recent Jet Results from the CMS experiment Raghav Kunnawalkam Elayavalli ( USA) Nuclear Seminar Monday, February 2nd, 2015 1 Overview https://twiki.cern.ch/twiki/bin/view/cmspublic/ PhysicsResultsHIN Motivations
More informationJet quenching in heavy-ion collisions at the LHC. Marta Verweij CERN
Jet quenching in heavy-ion collisions at the LHC Marta Verweij CERN EPFL Seminar May. 2, 2016 Thousands of particles are produced in one heavy ion collision Marta Verweij 2 Heavy ion collision Marta Verweij
More informationPreparations for the ATLAS Heavy Ion Physics Program at the LHC. Deepak Kar IKTP, TU Dresden On behalf of the ATLAS Collaboration
Preparations for the ATLAS Heavy Ion Physics Program at the LHC Deepak Kar IKTP, TU Dresden On behalf of the ATLAS Collaboration 1 QCD Hadronic phase: Bound states of quark and gluon pp collisions Heavy
More informationarxiv: v1 [nucl-ex] 7 Jan 2019
Open Heavy Flavour: Experimental summary arxiv:9.95v [nucl-ex] 7 Jan 9 Deepa homas he University of exas at Austin E-mail: deepa.thomas@cern.ch In this paper I will review a few of the latest experimental
More informationProbing ppb Collisions with Jets in CMS. Kurt Jung [ Purdue University ] for the CMS collabora?on
Probing ppb Collisions with Jets in CMS Kurt Jung [ Purdue University ] for the CMS collabora?on Workshop on proton- lead nucleus collisions at the LHC, ECT*, Trento, Italy. May 6-, 203 Dijet Anatomy in
More informationMeasurement of Jet Quenching in Pb-Pb Collisions at snn = 5.02 TeV in the ALICE Experiment at the LHC
Measurement of Jet Quenching in Pb-Pb Collisions at snn = 5.02 TeV in the ALICE Experiment at the LHC Hiroki Yokoyama LPSC, Université Grenoble-Alpes, CNRS/IN2P3 University of Tsukuba, Japan 2/04/206 2nd
More informationarxiv: v1 [nucl-ex] 6 Dec 2011
Higher harmonic anisotropic flow measurements of charged particles at s NN =.76 TeV with the ALICE detector You Zhou (for the ALICE Collaboration) arxiv:111.156v1 [nucl-ex] 6 Dec 011 Nikhef, Science Park
More informationDijet Asymmetry in Pb+Pb Collisions at S NN = 2.76 TeV Using the ALICE Experiment
Dijet Asymmetry in Pb+Pb Collisions at S NN = 2.76 TeV Using the ALICE Experiment { Isaac Mooney Advisors: Joern Putschke, Rosi Reed Wayne State University National Science Foundation Friday, August 8,
More informationALICE results in p Pb collisions at the LHC
on behalf of the ALICE Collaboration Subatech - Laboratoire de Physique Subatomique et des Technologies Associées, Nantes, France E-mail: stocco@subatech.inp.fr ALICE studies the properties of the strongly
More informationMatt Nguyen Rencontres QGP-France September 13 th, 2013
Matt Nguyen Rencontres QGP-France September 13 th, 2013 Review of jets in heavy ions 2 The Usual Disclaimers Not a comprehensive review, rather mostly a summary of experimental talks at July Jussieu workshop*
More informationConference Report Mailing address: CMS CERN, CH-1211 GENEVA 23, Switzerland
Available on the CMS information server CMS CR 212/178 The Compact Muon Solenoid Experiment Conference Report Mailing address: CMS CERN, CH211 GENEVA 23, Switzerland 212//9 Measurement of isolated photon
More informationCharged particle production in Pb-Pb and p-pb collisions at ALICE
Journal of Physics: Conference Series OPEN ACCESS Charged particle production in Pb-Pb and p-pb collisions at To cite this article: Chiara Oppedisano and the Collaboration J. Phys.: Conf. Ser. View the
More informationHeavy Ion Collision Measurements at the LHC Using the CMS Detector
Heavy Ion Collision Measurements at the LHC Using the CMS Detector David Krofcheck on behalf of the CMS Collaboration IAS-CERN Workshop, Singapore, March 26 th So, what happens at the LHC besides Higgs
More informationRecent results from relativistic heavy ion collisions
Recent results from relativistic heavy ion collisions Camelia Mironov MI at the LHC A teaser talk with very few (though recent) results LHC Heavy-Ion (HI) Program Collision systems Center of mass colliding
More informationarxiv: v1 [hep-ex] 1 Feb 2018
arxiv:8.6v [he-ex] Feb 8 MA Wigner RCP E-mail: varga-kofarago.monika@wigner.mta.hu In heavy-ion collisions, the quark gluon lasma is exected to be roduced, which is an almost erfect liquid that made u
More informationet Experiments at LHC
et Experiments at LHC (as opposed to Jet Physics at RHIC ) JET Collaboration Symposium Montreal June 2015 Heavy-ion jet results at LHC Dijet asymmetries Observation of a Centrality-Dependent Dijet Asymmetry
More informationarxiv: v1 [hep-ex] 18 Jan 2016
Jet measurements in pp, p Pb and Pb Pb collisions with ALICE at the LHC arxiv:6.446v [hep-ex] 8 Jan 6 Centre for Astroparticle Physics and Space Science, Bose Institute, Kolkata, 79 (INDIA) E-mail: sprasad@cern.ch
More informationarxiv: v1 [nucl-ex] 14 Oct 2013
Charged Jets in Minimum Bias p-pb Collisions at snn = 5.02 TeV with ALICE arxiv:1310.3612v1 [nucl-ex] 14 Oct 2013 for the ALICE collaboration Westfälische Wilhelms-Universität Münster, Germany E-mail:
More informationOverview of heavy ion CMS results
Overview of heavy ion CMS results Gian Michele Innocenti on behalf of the CMS Collaboration Massachusetts Institute of echnology Rencontres de Moriond QCD and High Energy Interactions March 19th - 26th,
More informationNeutral meson and direct photon measurement in pp and Pb Pb collisions at midrapidity with the ALICE experiment at the LHC
Neutral meson and direct photon measurement in pp and Pb Pb collisions at midrapidity with the ALICE experiment at the LHC Lucia Leardini Physikalisches Institut Heidelberg on behalf of the ALICE Collaboration
More informationFrancesco Barile for the ALICE Collaboration. Università degli Studi di Bari & INFN
Produzione di deutoni e anti-deutoni nelle collisioni centrali Pb-Pb a snn= 2.76 TeV con il rivelatore Cherenkov HMPID nell'ambito dell'esperimento ALICE ad LHC Francesco Barile for the ALICE Collaboration
More informationSummary of First results from Heavy Ion collisions at the LHC (ALICE, ATLAS, CMS)
Summary of First results from Heavy Ion collisions at the LHC (ALICE, ATLAS, CMS) Wen-Chen Chang 章文箴 Institute of Physics, Academia Sinica Weekly Journal Club for Medium Energy Physics at IPAS March 21,
More informationAzimuthal Correlations for Inclusive 2-jet, 3-jet and 4-jet events in pp collisions at s = 13 TeV with CMS
Azimuthal Correlations for Inclusive 2-jet, 3-jet and 4-jet events in pp collisions at s = 13 TeV with CMS Paris Gianneios University of Ioannina 29 th March 2018, HEP Athens Outline 1 2 3 4 5 CMS Detector
More informationAtlas results on diffraction
Atlas results on diffraction Alessia Bruni INFN Bologna, Italy for the ATLAS collaboration Rencontres du Viet Nam 14th Workshop on Elastic and Diffractive Scattering Qui Nhon, 16/12/2011 EDS 2011 Alessia
More informationMeasurement of photon production cross sections also in association with jets with the ATLAS detector
Nuclear and Particle Physics Proceedings 00 (07) 6 Nuclear and Particle Physics Proceedings Measurement of photon production cross sections also in association with jets with the detector Sebastien Prince
More informationOverview of ALICE results on azimuthal correlations using neutral- and heavy-flavor triggers
Journal of Physics: Conference Series PAPER OPEN ACCESS Overview of ALICE results on azimuthal correlations using neutral- and heavy-flavor triggers o cite this article: Sona Pochybova and ALICE Collaboration
More informationMultiple Parton-Parton Interactions: from pp to A-A
Multiple Parton-Parton Interactions: from pp to A-A Andreas Morsch CERN QCD Challenges at LHC Taxco, Mexico, Jan 18-22 (2016) Multiple Parton-Parton Interactions Phys. Lett. B 167 (1986) 476 Q i 2 Λ QCD
More informationCharged Particle Production in Pb+Pb Collisions at snn=2.76 TeV with the ATLAS detector at the LHC
Charged Particle Production in Pb+Pb Collisions at snn=2.76 TeV with the ATLAS detector at the LHC Dominik Derendarz for the ATLAS Collaboration Institute of Nuclear Physics PAN, Kraków, Poland Introduction
More informationLecture 3: Results of jet measurements in p-p and heavy ion collisions. Brian. A Cole, Columbia University June 14, 2013
Lecture 3: Results of measurements in - and heavy ion collisions Brian. A Cole, Columbia University June 4, 3 - cross-sections @.76 ev ALAS arxiv: 34.4739 submitted to EPJC dy [b/gev]!/d d 8 6 4 5 9 6
More informationCorrelations of Electrons from Heavy Flavor Decay with Hadrons in Au+Au and p+p Collisions arxiv: v1 [nucl-ex] 11 Jul 2011
Correlations of Electrons from Heavy Flavor Decay with Hadrons in and Collisions arxiv:7.v [nucl-ex] Jul Anne M. Sickles, for the PHENIX Collaboration Brookhaven National Laboratory, Upton, NY E-mail:
More informationJet Quenching in Heavy Ion collisions at the CMS detector
Jet Quenching in Heavy Ion collisions at the CMS detector Raghav Kunnawalkam Elayavalli ( USA) For the CMS Collaboration GHP 2015 Baltimore, MD 8 th April 2015 1 HI Collisions QGP Quark Gluon Plasma The
More informationUltra-Relativistic Heavy Ion Collision Results
Ultra-Relativistic Heavy Ion Collision Results I. Overview of Effects Observed in Large Nucleus-Nucleus Collision Systems (Au+Au, Pb+Pb) High p T Hadrons Are Suppressed at LHC & RHIC Central Pb-Pb and
More informationStudying collective phenomena in pp and A-A collisions with the ALICE experiment at the LHC
Studying collective phenomena in pp and A-A collisions with the ALICE experiment at the LHC Ivan Ravasenga Politecnico di Torino and I.N.F.N. 56 th course, Erice (Sicily, Italy) 14-23.06.2018 Ivan Ravasenga
More informationFederico Antinori (INFN Padova, Italy) on behalf of the ALICE Collaboration
Federico Antinori (INFN Padova, Italy) on behalf of the ALICE Collaboration ALICE run 2009-2010 Detector performance First physics results A taste of other analyses in advanced stage Outlook / Conclusion
More informationFirst Run-2 results from ALICE
First Run-2 results from ALICE Goethe University Frankfurt & GSI on behalf of the ALICE Collaboration XLV International Symposium on Multiparticle Dynamics Wildbad Kreuth, 4-9 Oct 2015 1 Outline Introduction
More informationProbing Transverse Momentum Broadening via Dihadron & Hadron-jet Angular Correlations. Shu-yi Wei (CCNU)
Har Probes, 6 Probing Transverse Momentum Broaening via Diharon & Haron-jet Angular Correlations Shu-yi Wei (CCNU) In collaboration with L. Chen, G.Y. Qin, B.W. Xiao & H.Z. Zhang arxiv:67.93 Contents Introuction
More informationPhysics with Tagged Forward Protons using the STAR Detector at RHIC. The Relativistic Heavy Ion Collider The pp2pp Experiment STAR 2009
Physics with Tagged Forward Protons using the STAR Detector at RHIC The Relativistic Heavy Ion Collider The pp2pp Experiment 2002 2003 STAR 2009 Elastic and Diffractive Processes Elastic scattering Detect
More informationSummary on high p T probes
Eur. Phys. J. C (2009) 61: 741 745 DOI 10.1140/epjc/s10052-009-0913-6 Regular Article - Experimental Physics Summary on high p T probes Saskia Mioduszewski a Cyclotron Institute, Texas A&M University,
More information