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Title: Measurement of the inclusive isolated prompt photon cross section in pp collisions at √s=7 TeV with the ATLAS detector

Abstract

A measurement of the cross section for the inclusive production of isolated prompt photons in pp collisions at a centre-of-mass energy √s = 7TeV is presented. The measurement covers the pseudorapidity ranges |ηγ| < 1.37 and 1.52 < |ηγ| < 1.81 in the transverse energy range 15 ≤ ETγ < 100 GeV. The results are based on an integrated luminosity of 880 nb-1, collected with the ATLAS detector at the Large Hadron Collider. Photon candidates are identified by combining information from the calorimeters and from the inner tracker. Residual background in the selected sample is estimated from data based on the observed distribution of the transverse isolation energy in a narrow cone around the photon candidate. Results are compared to predictions from next-to-leading order perturbative QCD calculations.

Authors:
 [1];  [2];  [3];  [4];  [5];  [6];  [7];  [8];  [9];  [10];  [11];  [12];  [13];  [14];  [15];  [16];  [17];  [18];  [19];  [20] more »;  [21];  [22] « less
  1. Albert-Ludwigs-Universitat, Freiburg (Germany). Fakultat fur Mathematik und Physik
  2. Univ. of Oklahoma, Norman, OK (United States). Homer L. Dodge Dept. of Physics and Astronomy
  3. Universitat Autonoma de Barcelona and ICREA, Barcelona (Spain). Institut de Fisica d' Altes Energies
  4. Universite de Geneve, Geneva (Switzerland). Section de Physique
  5. Oxford Univ., Oxford (United Kingdom). Dept. of Physics
  6. Academy of Sciences, Baku (Azerbaijan). Institute of Physics
  7. Oklahoma State Univ., Stillwater, OK (United States). Dept. of Physics
  8. Michigan State Univ., East Lansing, MI (United States). Dept. of Physics and Astronomy
  9. Tel Aviv Univ., Tel Aviv (Israel). Raymond and Beverly Sackler School of Physics and Astronomy
  10. Univ. Paris-Sud, Orsay (France). LAL
  11. Universita di Milano, Milano (Italy). Dipartimento di Fisica; INFN Sezione di Milano, Milano (Italy)
  12. Collegato di Udine (Italy). INFN Gruppo; ICTP, Trieste (Italy)
  13. Brookhaven National Lab. (BNL), Upton, NY (United States). Physics Dept.
  14. Hampton Univ., Hampton, VA (United States); Dept. of Physics
  15. Yale Univ., New Haven, CT (United States). Dept. of Physics
  16. Werner-Heisenberg-Institut, Muchen (Germany). Max-Planck-Institut fur Physik
  17. Ludwig Maximilian Univ., Munich (Germany). Fakultat fur Physik
  18. Queen Mary Univ. of London, London (United Kingdom). Dept. of Physics
  19. Rutherford Appleton Laboratory, Didcot (United Kingdom). Particle Physics Dept.
  20. Brandeis Univ., Waltham, MA (United States). Dept. of Physics
  21. Universidad de Granada, Granada (Spain). Departamento de Fisica Teorica y del Cosmos and CAFPE
  22. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Publication Date:
Research Org.:
Univ. of Pennsylvania, Philadelphia, PA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP)
Contributing Org.:
ATLAS Collaboration
OSTI Identifier:
1100069
Alternate Identifier(s):
OSTI ID: 1196765
Grant/Contract Number:  
FG02-95ER40893
Resource Type:
Published Article
Journal Name:
Physical Review. D, Particles, Fields, Gravitation and Cosmology
Additional Journal Information:
Journal Name: Physical Review. D, Particles, Fields, Gravitation and Cosmology Journal Volume: 83 Journal Issue: 5; Journal ID: ISSN 1550-7998
Publisher:
American Physical Society
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; photon cross section in pp collisions

Citation Formats

Aad, G., Abbott, B., Abdallah, J., Abdelalim, A. A., Abdesselam, A., Abdinov, O., Abi, B., Abolins, M., Abramowicz, H., Abreu, H., Acerbi, E., Acharya, B. S., Adams, D. L., Addy, T. N., Adelman, J., Aderholz, M., Adomeit, S., Adragna, P., Adye, T., Aefsky, S., Aguilar-Saavedra, J A., and Siegrist, James L. Measurement of the inclusive isolated prompt photon cross section in pp collisions at √s=7 TeV with the ATLAS detector. United States: N. p., 2011. Web. doi:10.1103/PhysRevD.83.052005.
Aad, G., Abbott, B., Abdallah, J., Abdelalim, A. A., Abdesselam, A., Abdinov, O., Abi, B., Abolins, M., Abramowicz, H., Abreu, H., Acerbi, E., Acharya, B. S., Adams, D. L., Addy, T. N., Adelman, J., Aderholz, M., Adomeit, S., Adragna, P., Adye, T., Aefsky, S., Aguilar-Saavedra, J A., & Siegrist, James L. Measurement of the inclusive isolated prompt photon cross section in pp collisions at √s=7 TeV with the ATLAS detector. United States. https://doi.org/10.1103/PhysRevD.83.052005
Aad, G., Abbott, B., Abdallah, J., Abdelalim, A. A., Abdesselam, A., Abdinov, O., Abi, B., Abolins, M., Abramowicz, H., Abreu, H., Acerbi, E., Acharya, B. S., Adams, D. L., Addy, T. N., Adelman, J., Aderholz, M., Adomeit, S., Adragna, P., Adye, T., Aefsky, S., Aguilar-Saavedra, J A., and Siegrist, James L. Fri . "Measurement of the inclusive isolated prompt photon cross section in pp collisions at √s=7 TeV with the ATLAS detector". United States. https://doi.org/10.1103/PhysRevD.83.052005.
@article{osti_1100069,
title = {Measurement of the inclusive isolated prompt photon cross section in pp collisions at √s=7 TeV with the ATLAS detector},
author = {Aad, G. and Abbott, B. and Abdallah, J. and Abdelalim, A. A. and Abdesselam, A. and Abdinov, O. and Abi, B. and Abolins, M. and Abramowicz, H. and Abreu, H. and Acerbi, E. and Acharya, B. S. and Adams, D. L. and Addy, T. N. and Adelman, J. and Aderholz, M. and Adomeit, S. and Adragna, P. and Adye, T. and Aefsky, S. and Aguilar-Saavedra, J A. and Siegrist, James L.},
abstractNote = {A measurement of the cross section for the inclusive production of isolated prompt photons in pp collisions at a centre-of-mass energy √s = 7TeV is presented. The measurement covers the pseudorapidity ranges |ηγ| < 1.37 and 1.52 < |ηγ| < 1.81 in the transverse energy range 15 ≤ ETγ < 100 GeV. The results are based on an integrated luminosity of 880 nb-1, collected with the ATLAS detector at the Large Hadron Collider. Photon candidates are identified by combining information from the calorimeters and from the inner tracker. Residual background in the selected sample is estimated from data based on the observed distribution of the transverse isolation energy in a narrow cone around the photon candidate. Results are compared to predictions from next-to-leading order perturbative QCD calculations.},
doi = {10.1103/PhysRevD.83.052005},
journal = {Physical Review. D, Particles, Fields, Gravitation and Cosmology},
number = 5,
volume = 83,
place = {United States},
year = {Fri Mar 18 00:00:00 EDT 2011},
month = {Fri Mar 18 00:00:00 EDT 2011}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1103/PhysRevD.83.052005

Citation Metrics:
Cited by: 127 works
Citation information provided by
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Figures / Tables:

FIG. 1 FIG. 1: The measured ambient transverse energy densities, using the jet-area method, for events with at least one tight photon. The ambient transverse energy contains contributions from both the underlying event and pileup. The broad distribution reflects the large event-to-event fluctuations.

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