Studies of jet quenching using isolated-photon+jet correlations in PbPb and pp collisions at √ sNN=2.76 TeV
Results from the first study of isolated-photon + jet correlations in relativistic heavy ion collisions are reported. The analysis uses data from PbPb collisions at a centre-of-mass energy of 2.76 TeV per nucleon pair corresponding to an integrated luminosity of 150 μb−1 recorded by the CMS experi...
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Article |
| Language: | en_US |
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American Physical Society
2014
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| Online Access: | http://hdl.handle.net/1721.1/91684 https://orcid.org/0000-0002-3831-9071 https://orcid.org/0000-0003-3106-4894 https://orcid.org/0000-0001-6332-5839 https://orcid.org/0000-0001-8983-2169 https://orcid.org/0000-0002-1260-777X https://orcid.org/0000-0002-6047-4211 https://orcid.org/0000-0003-3681-0649 https://orcid.org/0000-0002-0869-5631 |
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| author | Bendavid, Joshua L. Busza, Wit Butz, Erik M. Cali, Ivan Amos Chan, M. Dutta, Valentina Gomez-Ceballos, Guillelmo Goncharov, Maxim Hahn, Kristian Allan Klute, Markus Ma, Teng Nahn, Steven Paus, Christoph M. E. Ralph, Duncan Kelley Rudolph, Matthew Scott Stephans, George S. F. Stoeckli, Fabian Sung, Kevin Kai Hong Velicanu, Dragos Alexandru Wenger, Edward Allen Wyslouch, Boleslaw Xie, Si Yang, Mingming Yilmaz, Yetkin Zanetti, Marco CMS Collaboration Bauer, Gerry P Kim, Y. Li, W. Luckey Jr, P David Roland, Christof E Roland, Gunther M Sumorok, Konstanty C Wolf, Roger Yoon, A. S. |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Bendavid, Joshua L. Busza, Wit Butz, Erik M. Cali, Ivan Amos Chan, M. Dutta, Valentina Gomez-Ceballos, Guillelmo Goncharov, Maxim Hahn, Kristian Allan Klute, Markus Ma, Teng Nahn, Steven Paus, Christoph M. E. Ralph, Duncan Kelley Rudolph, Matthew Scott Stephans, George S. F. Stoeckli, Fabian Sung, Kevin Kai Hong Velicanu, Dragos Alexandru Wenger, Edward Allen Wyslouch, Boleslaw Xie, Si Yang, Mingming Yilmaz, Yetkin Zanetti, Marco CMS Collaboration Bauer, Gerry P Kim, Y. Li, W. Luckey Jr, P David Roland, Christof E Roland, Gunther M Sumorok, Konstanty C Wolf, Roger Yoon, A. S. |
| author_sort | Bendavid, Joshua L. |
| collection | MIT |
| description | Results from the first study of isolated-photon + jet correlations in relativistic heavy ion collisions are reported. The analysis uses data from PbPb collisions at a centre-of-mass energy of 2.76 TeV per nucleon pair corresponding to an integrated luminosity of 150 μb−1 recorded by the CMS experiment at the LHC. For events containing an isolated photon with transverse momentum pγ[over]T >60 GeV/c and an associated jet with pJet[over]T>30 GeV/c, the photon + jet pT imbalance is studied as a function of collision centrality and compared to pp data and pythia calculations at the same collision energy. Using the pγ[over]T of the isolated photon as an estimate of the momentum of the associated parton at production, this measurement allows an unbiased characterisation of the in-medium parton energy loss. For more central PbPb collisions, a significant decrease in the ratio pJet[over]T/pγ[over]T relative to that in the pythia reference is observed. Furthermore, significantly more pγ[over]T>60 GeV/c photons in PbPb are observed not to have an associated pJet[over]T>30 GeV/c jet, compared to the reference. However, no significant broadening of the photon + jet azimuthal correlation is observed. |
| first_indexed | 2024-09-23T14:49:02Z |
| format | Article |
| id | mit-1721.1/91684 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T14:49:02Z |
| publishDate | 2014 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/916842023-02-26T11:16:44Z Studies of jet quenching using isolated-photon+jet correlations in PbPb and pp collisions at √ sNN=2.76 TeV Bendavid, Joshua L. Busza, Wit Butz, Erik M. Cali, Ivan Amos Chan, M. Dutta, Valentina Gomez-Ceballos, Guillelmo Goncharov, Maxim Hahn, Kristian Allan Klute, Markus Ma, Teng Nahn, Steven Paus, Christoph M. E. Ralph, Duncan Kelley Rudolph, Matthew Scott Stephans, George S. F. Stoeckli, Fabian Sung, Kevin Kai Hong Velicanu, Dragos Alexandru Wenger, Edward Allen Wyslouch, Boleslaw Xie, Si Yang, Mingming Yilmaz, Yetkin Zanetti, Marco CMS Collaboration Bauer, Gerry P Kim, Y. Li, W. Luckey Jr, P David Roland, Christof E Roland, Gunther M Sumorok, Konstanty C Wolf, Roger Yoon, A. S. Massachusetts Institute of Technology. Department of Physics Massachusetts Institute of Technology. Laboratory for Nuclear Science Bauer, Gerry P. Bendavid, Joshua L. Busza, Wit Butz, Erik M. Cali, Ivan Amos Chan, M. Dutta, Valentina Gomez-Ceballos, Guillelmo Goncharov, Maxim Hahn, Kristian Allan Kim, Yongsun Klute, Markus Li, Wei Luckey, P. David Ma, Teng Nahn, Steven Paus, Christoph M. E. Ralph, Duncan Kelley Roland, Christof E. Roland, Gunther M. Rudolph, Matthew Scott Stephans, George S. F. Stoeckli, Fabian Sumorok, Konstanty C. Sung, Kevin Kai Hong Velicanu, Dragos Alexandru Wenger, Edward Allen Wolf, R. Wyslouch, Boleslaw Xie, Si Yang, Mingming Yilmaz, Yetkin Yoon, Andre S. Zanetti, Marco Results from the first study of isolated-photon + jet correlations in relativistic heavy ion collisions are reported. The analysis uses data from PbPb collisions at a centre-of-mass energy of 2.76 TeV per nucleon pair corresponding to an integrated luminosity of 150 μb−1 recorded by the CMS experiment at the LHC. For events containing an isolated photon with transverse momentum pγ[over]T >60 GeV/c and an associated jet with pJet[over]T>30 GeV/c, the photon + jet pT imbalance is studied as a function of collision centrality and compared to pp data and pythia calculations at the same collision energy. Using the pγ[over]T of the isolated photon as an estimate of the momentum of the associated parton at production, this measurement allows an unbiased characterisation of the in-medium parton energy loss. For more central PbPb collisions, a significant decrease in the ratio pJet[over]T/pγ[over]T relative to that in the pythia reference is observed. Furthermore, significantly more pγ[over]T>60 GeV/c photons in PbPb are observed not to have an associated pJet[over]T>30 GeV/c jet, compared to the reference. However, no significant broadening of the photon + jet azimuthal correlation is observed. United States. Dept. of Energy National Science Foundation (U.S.) 2014-11-21T19:58:37Z 2014-11-21T19:58:37Z 2013-01 Article http://purl.org/eprint/type/JournalArticle 03702693 http://hdl.handle.net/1721.1/91684 Chatrchyan, S., V. Khachatryan, A.M. Sirunyan, A. Tumasyan, W. Adam, T. Bergauer, M. Dragicevic, et al. “Studies of Jet Quenching Using Isolated-Photon+jet Correlations in PbPb and Pp Collisions At.” Physics Letters B 718, no. 3 (January 2013): 773–794. https://orcid.org/0000-0002-3831-9071 https://orcid.org/0000-0003-3106-4894 https://orcid.org/0000-0001-6332-5839 https://orcid.org/0000-0001-8983-2169 https://orcid.org/0000-0002-1260-777X https://orcid.org/0000-0002-6047-4211 https://orcid.org/0000-0003-3681-0649 https://orcid.org/0000-0002-0869-5631 en_US http://dx.doi.org/10.1016/j.physletb.2012.11.003 Physics Letters B Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf American Physical Society Elsevier |
| spellingShingle | Bendavid, Joshua L. Busza, Wit Butz, Erik M. Cali, Ivan Amos Chan, M. Dutta, Valentina Gomez-Ceballos, Guillelmo Goncharov, Maxim Hahn, Kristian Allan Klute, Markus Ma, Teng Nahn, Steven Paus, Christoph M. E. Ralph, Duncan Kelley Rudolph, Matthew Scott Stephans, George S. F. Stoeckli, Fabian Sung, Kevin Kai Hong Velicanu, Dragos Alexandru Wenger, Edward Allen Wyslouch, Boleslaw Xie, Si Yang, Mingming Yilmaz, Yetkin Zanetti, Marco CMS Collaboration Bauer, Gerry P Kim, Y. Li, W. Luckey Jr, P David Roland, Christof E Roland, Gunther M Sumorok, Konstanty C Wolf, Roger Yoon, A. S. Studies of jet quenching using isolated-photon+jet correlations in PbPb and pp collisions at √ sNN=2.76 TeV |
| title | Studies of jet quenching using isolated-photon+jet correlations in PbPb and pp collisions at √ sNN=2.76 TeV |
| title_full | Studies of jet quenching using isolated-photon+jet correlations in PbPb and pp collisions at √ sNN=2.76 TeV |
| title_fullStr | Studies of jet quenching using isolated-photon+jet correlations in PbPb and pp collisions at √ sNN=2.76 TeV |
| title_full_unstemmed | Studies of jet quenching using isolated-photon+jet correlations in PbPb and pp collisions at √ sNN=2.76 TeV |
| title_short | Studies of jet quenching using isolated-photon+jet correlations in PbPb and pp collisions at √ sNN=2.76 TeV |
| title_sort | studies of jet quenching using isolated photon jet correlations in pbpb and pp collisions at √ snn 2 76 tev |
| url | http://hdl.handle.net/1721.1/91684 https://orcid.org/0000-0002-3831-9071 https://orcid.org/0000-0003-3106-4894 https://orcid.org/0000-0001-6332-5839 https://orcid.org/0000-0001-8983-2169 https://orcid.org/0000-0002-1260-777X https://orcid.org/0000-0002-6047-4211 https://orcid.org/0000-0003-3681-0649 https://orcid.org/0000-0002-0869-5631 |
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