Artículo

Estamos trabajando para incorporar este artículo al repositorio
Consulte el artículo en la página del editor
Consulte la política de Acceso Abierto del editor

Abstract:

Jets created in association with a photon can be used as a calibrated probe to study energy loss in the medium created in nuclear collisions. Measurements of the transverse momentum balance between isolated photons and inclusive jets are presented using integrated luminosities of 0.49 nb −1 of Pb + Pb collision data at s NN =5.02 TeV and 25 pb −1 of pp collision data at s=5.02 TeV recorded with the ATLAS detector at the LHC. Photons with transverse momentum 63.1<p T γ <200 GeV and |η γ |<2.37 are paired with all jets in the event that have p T jet >31.6 GeV and pseudorapidity |η jet |<2.8. The transverse momentum balance given by the jet-to-photon p T ratio, x Jγ , is measured for pairs with azimuthal opening angle Δϕ>7π/8. Distributions of the per-photon jet yield as a function of x Jγ , (1/N γ )(dN/dx Jγ ), are corrected for detector effects via a two-dimensional unfolding procedure and reported at the particle level. In pp collisions, the distributions are well described by Monte Carlo event generators. In Pb + Pb collisions, the x Jγ distribution is modified from that observed in pp collisions with increasing centrality, consistent with the picture of parton energy loss in the hot nuclear medium. The data are compared with a suite of energy-loss models and calculations. © 2018 The Author(s)

Registro:

Documento: Artículo
Título:Measurement of photon–jet transverse momentum correlations in 5.02 TeV Pb + Pb and pp collisions with ATLAS
Autor:Aaboud, M. et al.
Este artículo contiene 2914 autores, consultelos en el artículo en formato pdf.
Filiación: Este artículo contiene 2914 autores con sus filiaciones, consultelas en el artículo en formato pdf.
Año:2019
Volumen:789
Página de inicio:167
Página de fin:190
DOI: http://dx.doi.org/10.1016/j.physletb.2018.12.023
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_v789_n_p167_Aaboud

Referencias:

  • Wang, X.-N., Huang, Z., Sarcevic, I., Jet quenching in the direction opposite to a tagged photon in high-energy heavy-ion collisions (1996) Phys. Rev. Lett., 77, p. 231
  • Wang, X.-N., Huang, Z., Medium-induced parton energy loss in γ + jet events of high-energy heavy-ion collisions (1997) Phys. Rev. C, 55, p. 3047
  • Qin, G.-Y., Ruppert, J., Gale, C., Jeon, S., Moore, G.D., Jet energy loss, photon production, and photon–hadron correlations at energies available at the BNL Relativistic Heavy Ion Collider (RHIC) (2009) Phys. Rev. C, 80
  • Renk, T., γ-hadron correlations as a tool to trace the flow of energy lost from hard partons in heavy-ion collisions (2009) Phys. Rev. C, 80
  • Qin, G.-Y., Parton shower evolution in medium and nuclear modification of photon-tagged jets in Pb + Pb collisions at the LHC (2014) Eur. Phys. J. C, 74, p. 2959
  • Wang, X.-N., Zhu, Y., Medium modification of γ-jets in high-energy heavy-ion collisions (2013) Phys. Rev. Lett., 111
  • Dai, W., Vitev, I., Zhang, B.-W., Momentum imbalance of isolated photon-tagged jet production at RHIC and LHC (2013) Phys. Rev. Lett., 110
  • Measurement of direct photons in Au + Au collisions at s NN =200 GeV (2012) Phys. Rev. Lett., 109
  • Centrality, rapidity and transverse momentum dependence of isolated prompt photon production in lead–lead collisions at s NN =2.76TeV measured with the ATLAS detector (2016) Phys. Rev. C, 93
  • Arleo, F., Eskola, K.J., Paukkunen, H., Salgado, C.A., Inclusive prompt photon production in nuclear collisions at RHIC and LHC (2011) J. High Energy Phys., 4
  • Observation of a centrality-dependent dijet asymmetry in lead–lead collisions at s NN =2.76TeV with the ATLAS detector at the LHC (2010) Phys. Rev. Lett., 105
  • Measurement of jet p T correlations in Pb + Pb and pp collisions at s NN =2.76TeV with the ATLAS detector (2017) Phys. Lett. B, 774, p. 379
  • Observation and studies of jet quenching in PbPb collisions at s NN =2.76 TeV (2011) Phys. Rev. C, 84
  • Measurement of the jet radius and transverse momentum dependence of inclusive jet suppression in lead–lead collisions at s NN =2.76TeV with the ATLAS detector (2013) Phys. Lett. B, 719, p. 220
  • Measurements of the nuclear modification factor for jets in Pb + Pb collisions at s NN =2.76TeV with the ATLAS detector (2015) Phys. Rev. Lett., 114
  • Jet momentum dependence of jet quenching in PbPb collisions at s NN =2.76 TeV (2012) Phys. Lett. B, 712, p. 176
  • Measurement of charged-particle spectra in Pb + Pb collisions at s NN =2.76TeV with the ATLAS detector at the LHC (2015) J. High Energy Phys., 9
  • Charged-particle nuclear modification factors in PbPb and pPb collisions at s NN =5.02TeV (2017) J. High Energy Phys., 4
  • Transverse momentum spectra and nuclear modification factors of charged particles in pp, p–Pb and Pb–Pb collisions at the LHC (2018); Photon–hadron jet correlations in p + p and Au + Au collisions at s NN =200 GeV (2009) Phys. Rev. C, 80
  • Medium modification of jet fragmentation in Au + Au collisions at s NN =200 GeV measured in direct photon–hadron correlations (2013) Phys. Rev. Lett., 111
  • Jet-like correlations with direct-photon and neutral-pion Triggers at s NN =200 GeV (2016) Phys. Lett. B, 760, p. 689
  • 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
  • Study of jet quenching with isolated-photon + jet correlations in PbPb and pp collisions at s NN =5.02 TeV (2018) Phys. Lett. B, 785, p. 14
  • Measurement of jet fragmentation in Pb + Pb and pp collisions at s NN =2.76TeV with the ATLAS detector at the LHC (2017) Eur. Phys. J. C, 77, p. 379
  • Chen, L., Study of isolated-photon and jet momentum imbalance in pp and PbPb collisions (2018) Nucl. Phys. B, 933, p. 306
  • Kang, Z.-B., Vitev, I., Xing, H., Vector-boson-tagged jet production in heavy ion collisions at energies available at the CERN large hadron collider (2017) Phys. Rev. C, 96
  • Kunnawalkam Elayavalli, R., Zapp, K.C., Simulating V + jet processes in heavy ion collisions with JEWEL (2016) Eur. Phys. J. C, 76, p. 695
  • Casalderrey-Solana, J., Gulhan, D.C., Milhano, J.G., Pablos, D., Rajagopal, K., Predictions for boson-jet observables and fragmentation function ratios from a hybrid strong/weak coupling model for jet quenching (2016) J. High Energy Phys., 3
  • The ATLAS experiment at the CERN large hadron collider (2008) J. Instrum., 3
  • Performance of the ATLAS trigger system in 2015 (2017) Eur. Phys. J. C, 77, p. 317
  • Measurement of longitudinal flow de-correlations in Pb + Pb collisions at s NN =2.76 and 5.02 TeV with the ATLAS detector (2018) Eur. Phys. J. C, 78, p. 142
  • Measurement of the pseudorapidity and transverse momentum dependence of the elliptic flow of charged particles in lead–lead collisions at s NN =2.76TeV with the ATLAS detector (2012) Phys. Lett. B, 707, p. 330
  • Miller, M.L., Reygers, K., Sanders, S.J., Steinberg, P., Glauber modeling in high energy nuclear collisions (2007) Annu. Rev. Nucl. Part. Sci., 57, p. 205
  • Prompt and non-prompt J/ψ and ψ(2S) suppression at high transverse momentum in 5.02TeV Pb + Pb collisions with the ATLAS experiment (2018) Eur. Phys. J. C, 78, p. 762
  • Agostinelli, S., GEANT4: a simulation toolkit (2003) Nucl. Instrum. Methods, Sect. A, 506, p. 250
  • The ATLAS simulation infrastructure (2010) Eur. Phys. J. C, 70, p. 823
  • Sjöstrand, T., Mrenna, S., Skands, P.Z., A brief introduction to PYTHIA 8.1 (2008) Comput. Phys. Commun., 178, p. 852
  • Ball, R.D., Parton distributions with LHC data (2013) Nucl. Phys. B, 867, p. 244
  • ATLAS Pythia 8 tunes to 7 TeV data (2014), https://cds.cern.ch/record/1966419, ATL-PHYS-PUB-2014-021; Gleisberg, T., Event generation with SHERPA 1.1 (2009) J. High Energy Phys., 2
  • Lai, H.-L., New parton distributions for collider physics (2010) Phys. Rev. D, 82
  • Bellm, J., Herwig 7.0/Herwig++ 3.0 release note (2016) Eur. Phys. J. C, 76, p. 196
  • Harland-Lang, L.A., Martin, A.D., Motylinski, P., Thorne, R.S., Parton distributions in the LHC era: MMHT 2014 PDFs (2015) Eur. Phys. J. C, 75, p. 204
  • Cacciari, M., Salam, G.P., Soyez, G., The anti-k t jet clustering algorithm (2008) J. High Energy Phys., 4
  • Cacciari, M., Salam, G.P., Soyez, G., FastJet user manual (2012) Eur. Phys. J. C, 72, p. 1896
  • Jet energy measurement with the ATLAS detector in proton–proton collisions at s=7TeV (2013) Eur. Phys. J. C, 73, p. 2304
  • Measurement of the inclusive isolated prompt photon cross section in pp collisions at s=8TeV with the ATLAS detector (2016) J. High Energy Phys., 8
  • Measurement of the cross section for inclusive isolated-photon production in pp collisions at s=13TeV using the ATLAS detector (2017) Phys. Lett. B, 770, p. 473
  • Photon identification in 2015 ATLAS (2016), https://cds.cern.ch/record/2203125, data ATL-PHYS-PUB-2016-014; Electron and photon energy calibration with the ATLAS detector using data collected in 2015 at s=13TeV (2016), https://cds.cern.ch/record/2203514, ATL-PHYS-PUB-2016-015; Centrality and rapidity dependence of inclusive jet production in s NN =5.02TeV proton–lead collisions with the ATLAS detector (2015) Phys. Lett. B, 748, p. 392
  • Jet energy scale measurements and their systematic uncertainties in proton–proton collisions at s=13TeV with the ATLAS detector (2017) Phys. Rev. D, 96
  • Measurement of the nuclear modification factor for inclusive jets in Pb + Pb collisions at s NN =5.02 TeV with the ATLAS detector (2018); D'Agostini, G., A multidimensional unfolding method based on Bayes' theorem (1995) Nucl. Instrum. Methods, Sect. A, 362, p. 487
  • Adye, T., Unfolding algorithms and tests using RooUnfold (2011); Jet energy scale and its uncertainty for jets reconstructed using the ATLAS heavy ion jet algorithm (2015), https://cds.cern.ch/record/2008677, ATLAS-CONF-2015-016; Measurement of jet fragmentation in Pb + Pb and pp collisions at s NN =5.02 TeV with the ATLAS detector (2018) Phys. Rev. C, 98
  • Jet calibration and systematic uncertainties for jets reconstructed in the ATLAS detector at s=13TeV (2015), https://cds.cern.ch/record/2037613, ATL-PHYS-PUB-2015-015; Data-driven determination of the energy scale and resolution of jets reconstructed in the ATLAS calorimeters using dijet and multijet events at s=8TeV (2015), https://cds.cern.ch/record/2008678, ATLAS-CONF-2015-017; ATLAS computing acknowledgements 2016–2017 https://cds.cern.ch/record/2202407, ATL-GEN-PUB-2016-002

Citas:

---------- APA ----------
(2019) . Measurement of photon–jet transverse momentum correlations in 5.02 TeV Pb + Pb and pp collisions with ATLAS. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 789, 167-190.
http://dx.doi.org/10.1016/j.physletb.2018.12.023
---------- CHICAGO ----------
Aaboud, M. "Measurement of photon–jet transverse momentum correlations in 5.02 TeV Pb + Pb and pp collisions with ATLAS" . Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 789 (2019) : 167-190.
http://dx.doi.org/10.1016/j.physletb.2018.12.023
---------- MLA ----------
Aaboud, M. "Measurement of photon–jet transverse momentum correlations in 5.02 TeV Pb + Pb and pp collisions with ATLAS" . Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 789, 2019, pp. 167-190.
http://dx.doi.org/10.1016/j.physletb.2018.12.023
---------- VANCOUVER ----------
Aaboud, M. Measurement of photon–jet transverse momentum correlations in 5.02 TeV Pb + Pb and pp collisions with ATLAS. Phys Lett Sect B Nucl Elem Part High-Energy Phys. 2019;789:167-190.
http://dx.doi.org/10.1016/j.physletb.2018.12.023