• Nie Znaleziono Wyników

A.3 ALICE collision data

A.3.1 MC data

In this analysis it was used AMPT General Purpose Monte Carlo productions anchored to the data from dataset LHC15o.

 LHC17i2:

245683, 245692, 245702, 245705, 245829, 245831, 245833, 245923, 245949, 245952, 245954, 246001, 246003, 246012, 246036, 246037, 246042, 246048, 246049, 246052, 246053, 246087, 246089, 246113, 246115, 246151, 246152, 246153, 246178, 246180, 246181, 246182, 246185, 246217, 246222, 246225, 246271, 246272, 246275, 246276, 246424, 246431, 246434, 246487, 246488, 246493, 246495, 246750, 246751, 246757, 246758, 246759, 246760, 246763, 246765, 246766, 246804, 246805, 246807, 246808, 246809, 246810, 246844, 246845, 246846, 246847, 246851, 246928, 246945, 246948, 246982, 246984, 246989, 246991, 246994

B

∆η∆ϕ

functions for different centrality ranges

In this appendix are presented correlation functions calculated for following centrality ranges:

0 − 10%, 10 − 20%, 20 − 40%, 40 − 60% and 60 − 80%. In the Fig. (B-32) are shown like-sign pairs correlation functions and in the Fig. (B-33) are shown plots for unlike-sign pairs. It can be observed that change of centrality range of collisions contributes to correlation functions by changing strength of elliptic flow effect.

Figure B-32: ∆η∆ϕ functions for like-sign pairs for Pb-Pb collisions at

sN N = 5.02 TeV. Different centralities.

B ∆η∆ϕFUNCTIONS FOR DIFFERENT CENTRALITY RANGES

Figure B-33: ∆η∆ϕ functions for unlike-sign pairs for Pb-Pb collisions at

sN N = 5.02TeV. Different centralities.

References

[1] The ALICE Collaboration, "Insight into particle production mechanisms via angular corre-lations of identified particles in pp collisions at√

s = 7TeV", Eur. Phys. J., vol. C77, no. 8, p. 569, 2017.

[2] "About CERN" site, https://home.cern/about, (accessed: 10.12.2019)

[3] J. Bartke, "Introduction to relativistic heavy ion physics", World Scientific, Singapur, 2009 [4] “Image of the ALICE detector.”

http://aliceinfo.cern.ch/Public/en/Chapter2/Chap2InsideAlice-en.html, (accessed: 10.12.2019)

[5] The ATLAS Collaboration, “The ATLAS Experiment at the CERN Large Hadron Collider", Journal of Instrumentation, vol. 3, no. 08, p. S08003, 2008.

[6] The CMS Collaboration, “The CMS experiment at the CERN LHC", Journal of Instrumen-tation,vol. 3, no. 08, p. S08004, 2008.

[7] The ALICE Collaboration, “The ALICE experiment at the CERN LHC", Journal of Instru-mentation, vol. 3, no. 08, p. S08002, 2008.

[8] The LHCb Collaboration, “The LHCb Detector at the LHC", Journal of Instrumentation, vol.

3,no. 08, p. S08005, 2008.

[9] M. A. Janik,"Two-particle correlations as a function of relative azimuthal angle andpseu-dorapidity in proton-proton collisions registered by the ALICE experiment." PhD the-sis,Warsaw U. of Tech., 2014

[10] Z.-W. Lin, C. M. Ko, B.-A. Li, B. Zhang, and S. Pal. "A Multi-phase transport model for relativistic heavy ion collisions", Phys. Rev., C72:064901, 2005.

[11] R. Brun et al., "GEANT3 User Guide", CERN Data Handling Division, DD/EE/84-1, 1985.

[12] D. H. Perkins, "Introduction to High Energy Physics.", Cambridge University Press, 4 ed., 2000.

[13] A. Zaborowska, “Pair angular correlations for pions, kaons and protons in proton-proton collisions in ALICE”, Master’s thesis, Warsaw University of Technology, 2014.

[14] ALICE Collaboration, Long-range angular correlation of π, K and p in p–Pb collisions at

√sN N = 5.02 TeV", Phys.Lett. B 726 (2013) 164-177 [15] S. Hawking, "A Brief history of time",1990

[16] J. L. Gramling, "Azimuthally Sensitive Hanbury Brown–Twiss Interferometry measured with the ALICE Experiment", Diploma Thesis University of Heidelberg, 2011

REFERENCES

[17] Space-time plot of heavy ion collision, https://www.star.bnl.gov/ gor-bunov/main/node5.html, (accessed: 10.12.2019)

[18] Phase diagram of hadronic matter, https://cds.cern.ch/record/1695331/plots, (accessed:

10.12.2019)

[19] CERN accelerators complex, https://cds.cern.ch/record/2684277, (accessed: 10.12.2019) [20] Standard model, https://en.wikipedia.org/wiki/Particle_physics, (accessed: 10.12.2019) [21] Quark confinement, https://particleadventure.org/quark_confinement.html, (accessed:

10.12.2019)

[22] The ALICE Collaboration, “ALICE technical design report of the time projection cham-ber(TPC)”, CERN, 2000.

[23] The ALICE Collaboration, “ALICE technical design report of the time-of-flight system (TOF)", CERN,2000.

[24] The ALICE Collaboration, "Alice Technical Design Report of the Inner Tracking System (ITS)", CERN, 1999.

List of Figures

1-1 ∆η∆ϕ functions for pp collisions at√

s = 7TeV. . . 15

1-2 Table of elementary particles included in Standard Model. From Ref. [20] . . . . 16

1-3 Creation new mesons due to confinement effect. From Ref. [21] . . . 18

1-4 The space-time evolution of heavy-ion collision with the phase transition to the QGP. From Ref. [17]. . . 18

1-5 The phase diagram of hadronic matter. From Ref. [18]. . . 19

2-6 Complex of accelerators at CERN. From Ref. [19]. . . 20

2-7 The ALICE detector. From Ref. [4]. . . 22

3-8 Definition of polar angle θ and azimuthal angle ϕ differences used to construct correlation function. From Ref. [13]. . . 24

3-9 Samples of signal distribution (left), background distribution (center) and corre-lation function (right). . . 25

3-10 Contribution from different sources of correlation. From Ref. [9]. . . 27

4-11 η, ϕ, and pT distributions for Pb-Pb collisions at√ sN N = 5.02TeV. . . 29

4-12 ηϕ distributions for Pb-Pb collisions at√ sN N = 5.02TeV. . . 29

4-13 TPC dE/dx distributions for Pb-Pb collisions at√ sN N = 5.02TeV. . . 31

4-14 TOF distributions for Pb-Pb collisions at√ sN N = 5.02TeV. . . 31

4-15 NσT P C vs NσT OF distributions for Pb-Pb collisions at√ sN N = 5.02TeV. . . 32

4-16 Reconstruction efficiency plot for Pb-Pb collisions at √ sN N = 5.02 TeV, calcu-lated using data from MC AMPT generator. . . 33

4-17 Secondary contamination plot for Pb-Pb collisions at √ sN N = 5.02 TeV, calcu-lated using data from MC AMPT generator. . . 34

4-18 Correction factor plot for Pb-Pb collisions at√ sN N = 5.02TeV, calculated using data from MC AMPT generator . . . 34

4-19 Purity plot for Pb-Pb collisions at √ sN N = 5.02TeV, calculated using data from MC AMPT generator. . . 35

5-20 ∆η∆ϕ functions before corrections for Pb-Pb collisions data at √ sN N = 5.02 TeV. Centrality 10-20% . . . 36

5-21 ∆η∆ϕ like-sign pairs functions after corrections for Pb-Pb collisions data at√ sN N = 5.02TeV. Centrality 10-20%. . . 37

5-22 ∆η∆ϕ functions Pb-Pb collisions data at √ sN N = 5.02 TeV for MC truth data from AMPT generator. . . 38

5-23 ∆η∆ϕ functions Pb-Pb collisions data at√ sN N = 5.02TeV for MC reconstructed data from AMPT generator. . . 38

5-24 MC closure test for Pb-Pb collisions data at √ sN N = 5.02 TeV for MC recon-structed and MC truth data from AMPT generator. . . 39

6-25 Comparison of ∆ϕ projections with TPC only and Global tracks for Pb-Pb colli-sions data at√ sN N = 5.02TeV. Centrality 10-20% . . . 41

LIST OF TABLES

6-26 Comparison of ∆ϕ projections with Hybrid and Global tracks for Pb-Pb collisions data at√

sN N = 5.02TeV. Centrality 10-20% . . . 41

6-27 Comparison of ∆ϕ projections with |η| < 0.7 and |η| < 0.8 for Pb-Pb collisions data at√ sN N = 5.02TeV. Centrality 10-20% . . . 42

6-28 Comparison of ∆ϕ projections with |η| < 0.9 and |η| < 0.8 for Pb-Pb collisions data at√ sN N = 5.02TeV. Centrality 10-20% . . . 43

6-29 Comparison of ∆ϕ projections with different PID method N σ and N σ with addi-tional rejection for Pb-Pb collisions data at√ sN N = 5.02TeV. Centrality 10-20% . 44 6-30 Comparison of ∆ϕ projections with different Two-Track-Cuts MergedFraction and RadialDistance for Pb-Pb collisions data at√ sN N = 5.02TeV. Centrality 10-20% 45 6-31 ∆ϕ projections of angular correlations functions for Pb-Pb collisions data at √sN N = 5.02TeV with marked summarized uncertainty. Centrality range 10 − 20% 47 B-32 ∆η∆ϕ functions for like-sign pairs for Pb-Pb collisions at √ sN N = 5.02 TeV. Different centralities. . . 51

B-33 ∆η∆ϕ functions for unlike-sign pairs for Pb-Pb collisions at√ sN N = 5.02 TeV. Different centralities. . . 52

List of Tables

4.1 Purity integrated over pT range for all particles used in the analysis in Pb-Pb collisions at√ sN N = 5.02TeV. . . 35

5.2 Pairs of particles that were used in this analysis. . . 36

6.3 Relative systematic uncertainties for different sample selection methods. . . 46

6.4 Maximum relative systematic uncertainty for different considered pairs. . . 46

Powiązane dokumenty