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Abstract:

Measurements of dijet p T correlations in Pb+Pb and pp collisions at a nucleon–nucleon centre-of-mass energy of s NN =2.76 TeV are presented. The measurements are performed with the ATLAS detector at the Large Hadron Collider using Pb+Pb and pp data samples corresponding to integrated luminosities of 0.14 nb −1 and 4.0 pb −1 , respectively. Jets are reconstructed using the anti-k t algorithm with radius parameter values R=0.3 and R=0.4. A background subtraction procedure is applied to correct the jets for the large underlying event present in Pb+Pb collisions. The leading and sub-leading jet transverse momenta are denoted p T 1 and p T 2 . An unfolding procedure is applied to the two-dimensional (p T 1 ,p T 2 ) distributions to account for experimental effects in the measurement of both jets. Distributions of (1/N)dN/dx J , where x J =p T 2 /p T 1 , are presented as a function of p T 1 and collision centrality. The distributions are found to be similar in peripheral Pb+Pb collisions and pp collisions, but highly modified in central Pb+Pb collisions. Similar features are present in both the R=0.3 and R=0.4 results, indicating that the effects of the underlying event are properly accounted for in the measurement. The results are qualitatively consistent with expectations from partonic energy loss models. © 2017 The Author

Registro:

Documento: Artículo
Título:Measurement of jet p T correlations in Pb + Pb and pp collisions at s NN =2.76 TeVwith the ATLAS detector
Autor:Aaboud, M. et al.
Este artículo contiene 2832 autores, consultelos en el artículo en formato pdf.
Filiación: Este artículo contiene 2832 autores con sus filiaciones, consultelas en el artículo en formato pdf.
Año:2017
Volumen:774
Página de inicio:379
Página de fin:402
DOI: http://dx.doi.org/10.1016/j.physletb.2017.09.078
Título revista:Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Título revista abreviado:Phys Lett Sect B Nucl Elem Part High-Energy Phys
ISSN:03702693
CODEN:PYLBA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03702693_v774_n_p379_Aaboud

Referencias:

  • Adcox, K., Formation of dense partonic matter in relativistic nucleus nucleus collisions at RHIC: experimental evaluation by the PHENIX collaboration (2005) Nucl. Phys. A, 757, p. 184. , arXiv:nucl-ex/0410003
  • Adams, J., Experimental and theoretical challenges in the search for the quark gluon plasma: the STAR collaboration's critical assessment of the evidence from RHIC collisions (2005) Nucl. Phys. A, 757, p. 102. , arXiv:nucl-ex/0501009
  • Observation of a centrality-dependent dijet asymmetry in lead–lead collisions at s NN =2.76 TeV with the ATLAS detector at the LHC (2010) Phys. Rev. Lett., 105. , arXiv:1011.6182 [hep-ex]
  • Bjorken, J.D., (1982), Energy loss of energetic partons in quark–gluon plasma: possible extinction of high p T jets in hadron–hadron collisions, FERMILAB-PUB-82-059-THY; Measurement of the jet radius and transverse momentum dependence of inclusive jet suppression in lead–lead collisions at s NN =2.76 TeV with the ATLAS detector (2013) Phys. Lett. B, 719, p. 220. , arXiv:1208.1967 [hep-ex]
  • Measurements of the nuclear modification factor for jets in Pb+Pb collisions at s NN =2.76 TeV with the ATLAS detector (2015) Phys. Rev. Lett., 114. , arXiv:1411.2357 [hep-ex]
  • Measurement of the azimuthal angle dependence of inclusive jet yields in Pb+Pb collisions at s NN =2.76 TeV with the ATLAS detector (2013) Phys. Rev. Lett., 111. , arXiv:1306.6469 [hep-ex]
  • Observation and studies of jet quenching in PbPb collisions at s NN =2.76 TeV (2011) Phys. Rev. C, 84. , arXiv:1102.1957 [hep-ex]
  • Jet momentum dependence of jet quenching in PbPb collisions at s NN =2.76 TeV (2012) Phys. Lett. B, 712, p. 176. , arXiv:1202.5022 [hep-ex]
  • Studies of jet quenching using isolated-photon+jet correlations in PbPb and pp collisions at s NN =2.76 TeV (2013) Phys. Lett. B, 718, p. 773. , arXiv:1205.0206 [hep-ex]
  • Measurement of inclusive jet charged-particle fragmentation functions in Pb+Pb collisions at s NN =2.76 TeV with the ATLAS detector (2014) Phys. Lett. B, 739, p. 320. , arXiv:1406.2979 [hep-ex]
  • Measurement of jet fragmentation into charged particles in pp and PbPb collisions at s NN =2.76 TeV (2012) J. High Energy Phys., 10. , arXiv:1205.5872 [hep-ex]
  • Measurement of jet fragmentation in PbPb and pp collisions at s NN =2.76 TeV (2014) Phys. Rev. C, 90. , arXiv:1406.0932 [hep-ex]
  • Abelev, B., Measurement of charged jet suppression in Pb-Pb collisions at s NN =2.76 TeV (2014) J. High Energy Phys., 3. , arXiv:1311.0633 [nucl-ex]
  • Cacciari, M., Salam, G.P., Soyez, G., The anti-k t jet clustering algorithm (2008) J. High Energy Phys., 4. , arXiv:0802.1189 [hep-ph]
  • The ATLAS experiment at the CERN Large Hadron Collider (2008) J. Instrum., 3
  • Measurement of the pseudorapidity and transverse momentum dependence of the elliptic flow of charged particles in lead–lead collisions at s NN =2.76 TeV with the ATLAS detector (2012) Phys. Lett. B, 707, p. 330. , arXiv:1108.6018 [hep-ex]
  • The performance of the jet trigger for the ATLAS detector during 2011 data taking (2016) Eur. Phys. J. C, 76, p. 526. , arXiv:1606.07759 [hep-ex]
  • Jet energy measurement with the ATLAS detector in proton–proton collisions at s=7 TeV (2013) Eur. Phys. J. C, 73, p. 2304. , arXiv:1112.6426 [hep-ex]
  • Miller, M.L., Glauber modeling in high energy nuclear collisions (2007) Annu. Rev. Nucl. Part. Sci., 57, p. 205. , arXiv:nucl-ex/0701025
  • Alver, B., The PHOBOS Glauber Monte Carlo (2008), arXiv:0805.4411 [nucl-ex]; Agostinelli, S., GEANT4: a simulation toolkit (2003) Nucl. Instrum. Methods Phys. Res., Sect. A, Accel. Spectrom. Detect. Assoc. Equip., 506, p. 250
  • The ATLAS simulation infrastructure (2010) Eur. Phys. J. C, 70, p. 823. , arXiv:1005.4568 [hep-ex]
  • Sjöstrand, T., Mrenna, S., Skands, P.Z., PYTHIA 6.4 physics and manual (2006) J. High Energy Phys., 5. , arXiv:hep-ph/0603175
  • ATLAS tunes of PYTHIA 6 and Pythia 8 for MC11 (2011), http://cdsweb.cern.ch/record/1363300, ATL-PHYS-PUB-2011-009; Pumplin, J., New generation of parton distributions with uncertainties from global QCD analysis (2002) J. High Energy Phys., 7. , arXiv:hep-ph/0201195
  • Sjöstrand, T., Mrenna, S., Skands, P.Z., A brief introduction to PYTHIA 8.1 (2008) Comput. Phys. Commun., 178, p. 852. , arXiv:0710.3820 [hep-ph]
  • Summary of ATLAS Pythia 8 tunes (2012), https://cds.cern.ch/record/1474107, ATL-PHYS-PUB-2012-003; Lai, H.-L., New parton distributions for collider physics (2010) Phys. Rev. D, 82. , arXiv:1007.2241 [hep-ph]
  • Lokhtin, I., Snigirev, A., A model of jet quenching in ultrarelativistic heavy ion collisions and high-p(T) hadron spectra at RHIC (2006) Eur. Phys. J. C, 45, p. 211. , arXiv:hep-ph/0506189
  • Cacciari, M., Salam, G.P., Soyez, G., FastJet user manual (2012) Eur. Phys. J. C, 72, p. 1896. , arXiv:1111.6097 [hep-ph]
  • Jet energy measurement and its systematic uncertainty in proton–proton collisions at s=7 TeV with the ATLAS detector (2015) Eur. Phys. J. C, 75, p. 17. , arXiv:1406.0076 [hep-ex]
  • Measurement of the azimuthal anisotropy for charged particle production in s NN =2.76 TeV lead–lead collisions with the ATLAS detector (2012) Phys. Rev. C, 86. , arXiv:1203.3087 [hep-ex]
  • D'Agostini, G., A multidimensional unfolding method based on Bayes’ theorem (1995) Nucl. Instrum. Methods Phys. Res., Sect. A, Accel. Spectrom. Detect. Assoc. Equip., 362, p. 487
  • Adye, T., Unfolding algorithms and tests using RooUnfold (2011), arXiv:1105.1160 [physics.data-an]; Jet energy resolution in proton–proton collisions at s=7 TeV recorded in 2010 with the ATLAS detector (2013) Eur. Phys. J. C, 73, p. 2306. , arXiv:1210.6210 [hep-ex]
  • Study of jet shapes in inclusive jet production in pp collisions at s=7 TeV using the ATLAS detector (2011) Phys. Rev. D, 83. , arXiv:1101.0070 [hep-ex]
  • Bahr, M., Herwig++ physics and manual (2008) Eur. Phys. J. C, 58, p. 639. , arXiv:0803.0883 [hep-ph]
  • Gieseke, S., Rohr, C., Siodmok, A., Colour reconnections in Herwig++ (2012) Eur. Phys. J. C, 72, p. 2225. , arXiv:1206.0041 [hep-ph]
  • Nason, P., A new method for combining NLO QCD with shower Monte Carlo algorithms (2004) J. High Energy Phys., 11. , arXiv:hep-ph/0409146
  • Frixione, S., Nason, P., Oleari, C., Matching NLO QCD computations with parton shower simulations: the POWHEG method (2007) J. High Energy Phys., 11. , arXiv:0709.2092 [hep-ph]
  • Alioli, S., A general framework for implementing NLO calculations in shower Monte Carlo programs: the POWHEG BOX (2010) J. High Energy Phys., 6. , arXiv:1002.2581 [hep-ph]
  • ATLAS computing acknowledgements 2016–2017 (2016), https://cdsweb.cern.ch/record/2202407, ATL-GEN-PUB-2016-002

Citas:

---------- APA ----------
(2017) . Measurement of jet p T correlations in Pb + Pb and pp collisions at s NN =2.76 TeVwith the ATLAS detector. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 774, 379-402.
http://dx.doi.org/10.1016/j.physletb.2017.09.078
---------- CHICAGO ----------
Aaboud, M. "Measurement of jet p T correlations in Pb + Pb and pp collisions at s NN =2.76 TeVwith the ATLAS detector" . Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 774 (2017) : 379-402.
http://dx.doi.org/10.1016/j.physletb.2017.09.078
---------- MLA ----------
Aaboud, M. "Measurement of jet p T correlations in Pb + Pb and pp collisions at s NN =2.76 TeVwith the ATLAS detector" . Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 774, 2017, pp. 379-402.
http://dx.doi.org/10.1016/j.physletb.2017.09.078
---------- VANCOUVER ----------
Aaboud, M. Measurement of jet p T correlations in Pb + Pb and pp collisions at s NN =2.76 TeVwith the ATLAS detector. Phys Lett Sect B Nucl Elem Part High-Energy Phys. 2017;774:379-402.
http://dx.doi.org/10.1016/j.physletb.2017.09.078