Jet (de)coherence in Pb–Pb collisions at the LHC
We study the modifications of jets created in heavy-ion collisions at LHC energies. The inherent hierarchy of scales governing the jet evolution allows to distinguish a leading jet structure, which interacts coherently with the medium as a single color charge, from softer sub-structures that will be...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2015-05-01
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| Series: | Physics Letters B |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S037026931500204X |
| _version_ | 1818525889177059328 |
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| author | Yacine Mehtar-Tani Konrad Tywoniuk |
| author_facet | Yacine Mehtar-Tani Konrad Tywoniuk |
| author_sort | Yacine Mehtar-Tani |
| collection | DOAJ |
| description | We study the modifications of jets created in heavy-ion collisions at LHC energies. The inherent hierarchy of scales governing the jet evolution allows to distinguish a leading jet structure, which interacts coherently with the medium as a single color charge, from softer sub-structures that will be sensitive to effects of color decoherence. We argue how this separation comes about and show that this picture is consistent with experimental data on reconstructed jets at the LHC, providing a quantitative description simultaneously of the jet nuclear modification factor, the missing energy in di-jet events and the modification of the fragmentation functions. In particular, we demonstrate that effects due to color decoherence are manifest in the excess of soft particles measured in fragmentation functions in Pb–Pb compared to proton–proton collisions. Keywords: Heavy-ion collisions, QCD jets, Jet quenching |
| first_indexed | 2024-12-11T06:15:21Z |
| format | Article |
| id | doaj.art-1c1be523bbc547b78450d75956d9c5b4 |
| institution | Directory Open Access Journal |
| issn | 0370-2693 |
| language | English |
| last_indexed | 2024-12-11T06:15:21Z |
| publishDate | 2015-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Physics Letters B |
| spelling | doaj.art-1c1be523bbc547b78450d75956d9c5b42022-12-22T01:17:59ZengElsevierPhysics Letters B0370-26932015-05-01744284287Jet (de)coherence in Pb–Pb collisions at the LHCYacine Mehtar-Tani0Konrad Tywoniuk1Institute for Nuclear Theory, University of Washington, Box 351550, Seattle, WA 98195-1550, USADepartament d'Estructura i Constituents de la Matèria and Institut de Ciències del Cosmos (IC-CUB), Universitat de Barcelona, Martí i Franquès 1, 08028 Barcelona, Spain; Corresponding author.We study the modifications of jets created in heavy-ion collisions at LHC energies. The inherent hierarchy of scales governing the jet evolution allows to distinguish a leading jet structure, which interacts coherently with the medium as a single color charge, from softer sub-structures that will be sensitive to effects of color decoherence. We argue how this separation comes about and show that this picture is consistent with experimental data on reconstructed jets at the LHC, providing a quantitative description simultaneously of the jet nuclear modification factor, the missing energy in di-jet events and the modification of the fragmentation functions. In particular, we demonstrate that effects due to color decoherence are manifest in the excess of soft particles measured in fragmentation functions in Pb–Pb compared to proton–proton collisions. Keywords: Heavy-ion collisions, QCD jets, Jet quenchinghttp://www.sciencedirect.com/science/article/pii/S037026931500204X |
| spellingShingle | Yacine Mehtar-Tani Konrad Tywoniuk Jet (de)coherence in Pb–Pb collisions at the LHC Physics Letters B |
| title | Jet (de)coherence in Pb–Pb collisions at the LHC |
| title_full | Jet (de)coherence in Pb–Pb collisions at the LHC |
| title_fullStr | Jet (de)coherence in Pb–Pb collisions at the LHC |
| title_full_unstemmed | Jet (de)coherence in Pb–Pb collisions at the LHC |
| title_short | Jet (de)coherence in Pb–Pb collisions at the LHC |
| title_sort | jet de coherence in pb pb collisions at the lhc |
| url | http://www.sciencedirect.com/science/article/pii/S037026931500204X |
| work_keys_str_mv | AT yacinemehtartani jetdecoherenceinpbpbcollisionsatthelhc AT konradtywoniuk jetdecoherenceinpbpbcollisionsatthelhc |