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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:http://digital.bl.fcen.uba.ar/collection/paper/document/paper_03702693_v789_n_p167_Aaboud

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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