Resolution effects in the hybrid strong/weak coupling model
Within the context of a hybrid strong/weak coupling model of jet quenching, we study the consequences of the fact that the plasma produced in a heavy ion collision cannot resolve the substructure of a collimated parton shower propagating through it with arbitrarily fine spatial resolution. We introd...
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| Format: | Article |
| Language: | English |
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Springer Berlin Heidelberg
2018
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| Online Access: | http://hdl.handle.net/1721.1/115924 https://orcid.org/0000-0001-5812-8718 |
| _version_ | 1826207193373868032 |
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| author | Pablos, Daniel Hulcher, Zachary R. Rajagopal, Krishna |
| author2 | Massachusetts Institute of Technology. Center for Theoretical Physics |
| author_facet | Massachusetts Institute of Technology. Center for Theoretical Physics Pablos, Daniel Hulcher, Zachary R. Rajagopal, Krishna |
| author_sort | Pablos, Daniel |
| collection | MIT |
| description | Within the context of a hybrid strong/weak coupling model of jet quenching, we study the consequences of the fact that the plasma produced in a heavy ion collision cannot resolve the substructure of a collimated parton shower propagating through it with arbitrarily fine spatial resolution. We introduce a screening length parameter, L[subscript res], proportional to the inverse of the local temperature in the plasma, estimating a range for the value of the proportionality constant via comparing weakly coupled QCD calculations and holographic calculations appropriate in strongly coupled plasma. We then modify the hybrid model so that when a parton in a jet shower splits, its two offspring are initially treated as unresolved, and are only treated as two separate partons losing energy independently after they are separated by a distance L[subscript res]. This modification delays the quenching of partons with intermediate energy, resulting in the survival of more hadrons in the final state with pT in the several GeV range. We analyze the consequences of different choices for the value of the resolution length, L[subscript res], and demonstrate that introducing a nonzero L[subscript res] results in modifications to the jet shapes and jet fragmentations functions, as it makes it more probable for particles carrying a small fraction of the jet energy at larger angles from the jet axis to survive their passage through the quark-gluon plasma. These effects are, however, small in magnitude, something that we confirm via checking for effects on missing-pT observables. Keywords: Heavy Ion Phenomenology, Jets |
| first_indexed | 2024-09-23T13:45:30Z |
| format | Article |
| id | mit-1721.1/115924 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T13:45:30Z |
| publishDate | 2018 |
| publisher | Springer Berlin Heidelberg |
| record_format | dspace |
| spelling | mit-1721.1/1159242022-10-01T16:59:14Z Resolution effects in the hybrid strong/weak coupling model Pablos, Daniel Hulcher, Zachary R. Rajagopal, Krishna Massachusetts Institute of Technology. Center for Theoretical Physics Massachusetts Institute of Technology. Department of Physics Hulcher, Zachary R. Rajagopal, Krishna Within the context of a hybrid strong/weak coupling model of jet quenching, we study the consequences of the fact that the plasma produced in a heavy ion collision cannot resolve the substructure of a collimated parton shower propagating through it with arbitrarily fine spatial resolution. We introduce a screening length parameter, L[subscript res], proportional to the inverse of the local temperature in the plasma, estimating a range for the value of the proportionality constant via comparing weakly coupled QCD calculations and holographic calculations appropriate in strongly coupled plasma. We then modify the hybrid model so that when a parton in a jet shower splits, its two offspring are initially treated as unresolved, and are only treated as two separate partons losing energy independently after they are separated by a distance L[subscript res]. This modification delays the quenching of partons with intermediate energy, resulting in the survival of more hadrons in the final state with pT in the several GeV range. We analyze the consequences of different choices for the value of the resolution length, L[subscript res], and demonstrate that introducing a nonzero L[subscript res] results in modifications to the jet shapes and jet fragmentations functions, as it makes it more probable for particles carrying a small fraction of the jet energy at larger angles from the jet axis to survive their passage through the quark-gluon plasma. These effects are, however, small in magnitude, something that we confirm via checking for effects on missing-pT observables. Keywords: Heavy Ion Phenomenology, Jets Massachusetts Institute of Technology. Undergraduate Research Opportunities Program United States. Department of Energy (Contract DE-SC0011090) 2018-05-29T13:40:37Z 2018-05-29T13:40:37Z 2018-03 2018-02 2018-03-11T04:21:57Z Article http://purl.org/eprint/type/JournalArticle 1029-8479 http://hdl.handle.net/1721.1/115924 Hulcher, Zachary, et al. “Resolution Effects in the Hybrid Strong/Weak Coupling Model.” Journal of High Energy Physics, vol. 2018, no. 3, Mar. 2018. © The Authors https://orcid.org/0000-0001-5812-8718 en http://dx.doi.org/10.1007/JHEP03(2018)010 Journal of High Energy Physics Creative Commons Attribution http://creativecommons.org/licenses/by/4.0/ The Author(s) application/pdf Springer Berlin Heidelberg Springer Berlin Heidelberg |
| spellingShingle | Pablos, Daniel Hulcher, Zachary R. Rajagopal, Krishna Resolution effects in the hybrid strong/weak coupling model |
| title | Resolution effects in the hybrid strong/weak coupling model |
| title_full | Resolution effects in the hybrid strong/weak coupling model |
| title_fullStr | Resolution effects in the hybrid strong/weak coupling model |
| title_full_unstemmed | Resolution effects in the hybrid strong/weak coupling model |
| title_short | Resolution effects in the hybrid strong/weak coupling model |
| title_sort | resolution effects in the hybrid strong weak coupling model |
| url | http://hdl.handle.net/1721.1/115924 https://orcid.org/0000-0001-5812-8718 |
| work_keys_str_mv | AT pablosdaniel resolutioneffectsinthehybridstrongweakcouplingmodel AT hulcherzacharyr resolutioneffectsinthehybridstrongweakcouplingmodel AT rajagopalkrishna resolutioneffectsinthehybridstrongweakcouplingmodel |