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:

The dynamics of isolated-photon plus one-, two- and three-jet production in pp collisions at a centre-of-mass energy of 8 TeV are studied with the ATLAS detector at the LHC using a data set with an integrated luminosity of 20.2 fb −1 . Measurements of isolated-photon plus jets cross sections are presented as functions of the photon and jet transverse momenta. The cross sections as functions of the azimuthal angle between the photon and the jets, the azimuthal angle between the jets, the photon–jet invariant mass and the scattering angle in the photon–jet centre-of-mass system are presented. The pattern of QCD radiation around the photon and the leading jet is investigated by measuring jet production in an annular region centred on each object; enhancements are observed around the leading jet with respect to the photon in the directions towards the beams. The experimental measurements are compared to several different theoretical calculations, and overall a good description of the data is found. © 2017 The Author(s)

Registro:

Documento: Artículo
Título:High-E T isolated-photon plus jets production in pp collisions at s=8 TeV with the ATLAS detector
Autor:The ATLAS Collaboration et al.
Este artículo contiene 2854 autores, consultelos en el artículo en formato pdf.
Filiación: Este artículo contiene 2854 autores con sus filiaciones, consultelas en el artículo en formato pdf.
Año:2017
Volumen:918
Página de inicio:257
Página de fin:316
DOI: http://dx.doi.org/10.1016/j.nuclphysb.2017.03.006
Título revista:Nuclear Physics B
Título revista abreviado:Nucl. Phys. B
ISSN:05503213
CODEN:NUPBB
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_05503213_v918_n_p257_TheATLASCollaboration

Referencias:

  • d'Enterria, D., Rojo, J., Quantitative constraints on the gluon distribution function in the proton from collider isolated-photon data (2012) Nucl. Phys. B, 860, p. 311. , arXiv:1202.1762 [hep-ph]
  • Carminati, L., Sensitivity of the LHC isolated-γ+jet data to the parton distribution functions of the proton (2013) Europhys. Lett., 101, p. 61002. , arXiv:1212.5511 [hep-ph]
  • Dynamics of isolated-photon plus jet production in pp collisions at s=7 TeV with the ATLAS detector (2013) Nucl. Phys. B, 875, p. 483. , arXiv:1307.6795 [hep-ex]
  • Pietrycki, T., Szczurek, A., Photon–jet correlations in pp and pp collisions (2007) Phys. Rev. D, 76. , arXiv:0704.2158 [hep-ph]
  • Belghobsi, Z., Photon–jet correlations and constraints on fragmentation functions (2009) Phys. Rev. D, 79. , arXiv:0903.4834 [hep-ph]
  • Measurement of the inclusive isolated prompt photon cross section in pp collisions at s=7 TeV with the ATLAS detector (2011) Phys. Rev. D, 83. , arXiv:1012.4389 [hep-ex]
  • Measurement of the inclusive isolated prompt photon cross-section in pp collisions at s=7 TeV using 35 pb −1 of ATLAS data (2011) Phys. Lett. B, 706, p. 150. , arXiv:1108.0253 [hep-ex]
  • Measurement of the inclusive isolated, prompt photons cross section in pp collisions at s=7 TeV with the ATLAS detector using 4.6 fb −1 (2014) Phys. Rev. D, 89. , arXiv:1311.1440 [hep-ex]
  • Measurement of the inclusive isolated prompt photon cross section in pp collisions at s=8 TeV with the ATLAS detector (2016) J. High Energy Phys., 1608. , arXiv:1605.03495 [hep-ex]
  • Measurement of the isolated prompt photon production cross section in pp collisions at s=7 TeV (2011) Phys. Rev. Lett., 106. , arXiv:1012.0799 [hep-ex]
  • Measurement of the differential cross section for isolated prompt photon production in pp collisions at 7 TeV (2011) Phys. Rev. D, 84. , arXiv:1108.2044 [hep-ex]
  • Measurement of the production cross section of an isolated photon associated with jets in proton–proton collisions at s=7 TeV with the ATLAS detector (2012) Phys. Rev. D, 85. , arXiv:1203.3161 [hep-ex]
  • Rapidity distributions in exclusive Z+jet and γ+jet events in pp collisions at s=7 TeV (2013) Phys. Rev. D, 88. , arXiv:1310.3082 [hep-ex]
  • Measurement of the triple-differential cross section for photon+jets production in proton–proton collisions at s=7 TeV (2014) J. High Energy Phys., 1406. , arXiv:1311.6141 [hep-ex]
  • Comparison of the Z/γ ⁎ +jets to γ+jets cross sections in pp collisions at s=8 TeV (2015) J. High Energy Phys., 1510. , arXiv:1505.06520 [hep-ex]
  • Abe, F., Evidence for color coherence in pp collisions at s=1.8 TeV (1994) Phys. Rev. D, 50, p. 5562
  • Abbott, B., Color coherent radiation in multijet events from pp collisions at s=1.8 TeV (1997) Phys. Lett. B, 414, p. 419. , arXiv:hep-ex/9706012
  • Keller, S., Owens, J.F., Event structure in photon plus two jet final states (1991) Phys. Lett. B, 269, p. 445
  • Bern, Z., Driving missing data at next-to-leading order (2011) Phys. Rev. D, 84. , arXiv:1106.1423 [hep-ph]
  • Bern, Z., Missing energy and jets for supersymmetry searches (2013) Phys. Rev. D, 87. , arXiv:1206.6064 [hep-ph]
  • 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]
  • Gleisberg, T., Event generation with SHERPA 1.1 (2009) J. High Energy Phys., 902. , arXiv:0811.4622 [hep-ph]
  • Catani, S., Fontannaz, M., Guillet, J.P., Pilon, E., Cross section of isolated prompt photons in hadron–hadron collisions (2002) J. High Energy Phys., 205. , arXiv:hep-ph/0204023
  • Aurenche, P., Fontannaz, M., Guillet, J.P., Pilon, E., Werlen, M., A new critical study of photon production in hadronic collisions (2006) Phys. Rev. D, 73. , arXiv:hep-ph/0602133
  • Berger, C.F., An automated implementation of on-shell methods for one-loop amplitudes (2008) Phys. Rev. D, 78. , arXiv:0803.4180 [hep-ph]
  • Bern, Z., Four-jet production at the large hadron collider at next-to-leading order in QCD (2012) Phys. Rev. Lett., 109. , arXiv:1112.3940 [hep-ph]
  • The ATLAS experiment at the CERN large hadron collider (2008) J. Instrum., 3
  • Performance of the ATLAS trigger system in 2010 (2012) Eur. Phys. J. C, 72, p. 1849. , arXiv:1110.1530 [hep-ex]
  • Luminosity determination in pp collisions at s=8 TeV using the ATLAS detector at the LHC (2016) Eur. Phys. J. C, 76, p. 653. , arXiv:1608.03953 [hep-ex]
  • Measurement of the photon identification efficiencies with the ATLAS detector using LHC Run-1 data (2016) Eur. Phys. J. C, 76, p. 666. , arXiv:1606.01813 [hep-ex]
  • Electron and photon energy calibration with the ATLAS detector using LHC Run 1 data (2014) Eur. Phys. J. C, 74, p. 3071. , arXiv:1407.5063 [hep-ex]
  • (2016) Topological cell clustering in the ATLAS calorimeters and its performance in LHC Run 1, , arXiv:1603.02934 [hep-ex]
  • Cacciari, M., Salam, G.P., Soyez, G., The catchment area of jets (2008) J. High Energy Phys., 804. , arXiv:0802.1188 [hep-ph]
  • Cacciari, M., Salam, G., Soyez, G., The anti-k t jet clustering algorithm (2008) J. High Energy Phys., 804. , arXiv:0802.1189 [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]
  • (2015) Jet Global Sequential Corrections with the ATLAS Detector in Proton–Proton Collisions at s=8 TeV, , http://cds.cern.ch/record/2001682, ATLAS-CONF-2015-002
  • (2015) Monte Carlo Calibration and Combination of In-situ Measurements of Jet Energy Scale, Jet Energy Resolution and Jet Mass in ATLAS, , http://cds.cern.ch/record/2044941, ATLAS-CONF-2015-037
  • 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]
  • Frixione, S., Ridolfi, G., Jet photoproduction at HERA (1997) Nucl. Phys. B, 507, p. 315. , arXiv:hep-ph/9707345
  • Andersson, B., Gustafson, G., Ingelman, G., Sjöstrand, T., Parton fragmentation and string dynamics (1983) Phys. Rep., 97, p. 31
  • Winter, C., Krauss, F., Soff, G., A modified cluster hadronisation model (2004) Eur. Phys. J. C, 36, p. 381. , arXiv:hep-ph/0311085
  • Pumplin, J., New generation of parton distributions with uncertainties from global QCD analysis (2002) J. High Energy Phys., 207. , arXiv:hep-ph/0201195
  • Lai, H.-L., New parton distributions for collider physics (2010) Phys. Rev. D, 82. , arXiv:1007.2241 [hep-ph]
  • (2012) Summary of ATLAS Pythia 8 Tunes, , http://cds.cern.ch/record/1474107, ATL-PHYS-PUB-2012-003
  • Agostinelli, S., GEANT4 – a simulation toolkit (2003) Nucl. Instrum. Methods A, 506, p. 250
  • The ATLAS simulation infrastructure (2010) Eur. Phys. J. C, 70, p. 823. , arXiv:1005.4568 [physics.ins-det]
  • Martin, A.D., Stirling, W.J., Thorne, R.S., Watt, G., Uncertainties on α s in global PDF analyses and implications for predicted hadronic cross sections (2009) Eur. Phys. J. C, 64, p. 653. , arXiv:0905.3531 [hep-ph]
  • D'Agostini, G., A multidimensional unfolding method based on Bayes' theorem (1995) Nucl. Instrum. Methods A, 362, p. 487
  • Bourhis, L., Fontannaz, M., Guillet, J.P., Quark and gluon fragmentation functions into photons (1998) Eur. Phys. J. C, 2, p. 529. , arXiv:hep-ph/9704447
  • Frixione, S., Isolated photons in perturbative QCD (1998) Phys. Lett. B, 429, p. 369. , arXiv:hep-ph/9801442
  • (2016) ATLAS Computing Acknowledgements 2016–2017, , http://cds.cern.ch/record/2202407, ATL-GEN-PUB-2016-002

Citas:

---------- APA ----------
(2017) . High-E T isolated-photon plus jets production in pp collisions at s=8 TeV with the ATLAS detector. Nuclear Physics B, 918, 257-316.
http://dx.doi.org/10.1016/j.nuclphysb.2017.03.006
---------- CHICAGO ----------
The ATLAS Collaboration. "High-E T isolated-photon plus jets production in pp collisions at s=8 TeV with the ATLAS detector" . Nuclear Physics B 918 (2017) : 257-316.
http://dx.doi.org/10.1016/j.nuclphysb.2017.03.006
---------- MLA ----------
The ATLAS Collaboration. "High-E T isolated-photon plus jets production in pp collisions at s=8 TeV with the ATLAS detector" . Nuclear Physics B, vol. 918, 2017, pp. 257-316.
http://dx.doi.org/10.1016/j.nuclphysb.2017.03.006
---------- VANCOUVER ----------
The ATLAS Collaboration. High-E T isolated-photon plus jets production in pp collisions at s=8 TeV with the ATLAS detector. Nucl. Phys. B. 2017;918:257-316.
http://dx.doi.org/10.1016/j.nuclphysb.2017.03.006