Precision boson-jet azimuthal decorrelation at hadron colliders
Abstract The azimuthal angular decorrelation of a vector boson and jet is sensitive to QCD radiation, and can be used to probe the quark-gluon plasma in heavy-ion collisions. By using a recoil-free jet definition, the sensitivity to contamination from soft radiation on the measurement is reduced, an...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2023-02-01
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| Series: | Journal of High Energy Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1007/JHEP02(2023)256 |
| _version_ | 1797779157128577024 |
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| author | Yang-Ting Chien Rudi Rahn Ding Yu Shao Wouter J. Waalewijn Bin Wu |
| author_facet | Yang-Ting Chien Rudi Rahn Ding Yu Shao Wouter J. Waalewijn Bin Wu |
| author_sort | Yang-Ting Chien |
| collection | DOAJ |
| description | Abstract The azimuthal angular decorrelation of a vector boson and jet is sensitive to QCD radiation, and can be used to probe the quark-gluon plasma in heavy-ion collisions. By using a recoil-free jet definition, the sensitivity to contamination from soft radiation on the measurement is reduced, and the complication of non-global logarithms is eliminated from our theoretical calculation. Specifically we will consider the p T n $$ {p}_T^n $$ recombination scheme, as well as the n → ∞ limit, known as the winner-take-all scheme. These jet definitions also significantly simplify the calculation for a track-based measurement, which is preferred due to its superior angular resolution. We present a detailed discussion of the factorization in Soft-Collinear Effective Theory, revealing why the transverse momentum q → T $$ {\overrightarrow{q}}_T $$ is more complicated than the azimuthal angle. We show that potential glauber contributions do not spoil our factorization formalism, at least up to and including order α s 3 $$ {\alpha}_s^3 $$ . The resummation is carried out using the renormalization group, and all necessary ingredients are collected or calculated. We conclude with a detailed phenomenological study, finding an enhanced matching correction for high jet p T due to the electroweak collinear enhancement of a boson emission off di-jets. We also compare with the Pythia event generator, finding that our observable is very robust to hadronization and the underlying event. |
| first_indexed | 2024-03-12T23:26:34Z |
| format | Article |
| id | doaj.art-d4ad61ab6d254b109b04d0e5c94e00be |
| institution | Directory Open Access Journal |
| issn | 1029-8479 |
| language | English |
| last_indexed | 2024-03-12T23:26:34Z |
| publishDate | 2023-02-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj.art-d4ad61ab6d254b109b04d0e5c94e00be2023-07-16T11:06:44ZengSpringerOpenJournal of High Energy Physics1029-84792023-02-012023215010.1007/JHEP02(2023)256Precision boson-jet azimuthal decorrelation at hadron collidersYang-Ting Chien0Rudi Rahn1Ding Yu Shao2Wouter J. Waalewijn3Bin Wu4Physics and Astronomy Department, Georgia State UniversityNikhef, Theory GroupDepartment of Physics and Center for Field Theory and Particle Physics, Fudan UniversityNikhef, Theory GroupInstituto Galego de Física de Altas Enerxías IGFAE, Universidade de Santiago de CompostelaAbstract The azimuthal angular decorrelation of a vector boson and jet is sensitive to QCD radiation, and can be used to probe the quark-gluon plasma in heavy-ion collisions. By using a recoil-free jet definition, the sensitivity to contamination from soft radiation on the measurement is reduced, and the complication of non-global logarithms is eliminated from our theoretical calculation. Specifically we will consider the p T n $$ {p}_T^n $$ recombination scheme, as well as the n → ∞ limit, known as the winner-take-all scheme. These jet definitions also significantly simplify the calculation for a track-based measurement, which is preferred due to its superior angular resolution. We present a detailed discussion of the factorization in Soft-Collinear Effective Theory, revealing why the transverse momentum q → T $$ {\overrightarrow{q}}_T $$ is more complicated than the azimuthal angle. We show that potential glauber contributions do not spoil our factorization formalism, at least up to and including order α s 3 $$ {\alpha}_s^3 $$ . The resummation is carried out using the renormalization group, and all necessary ingredients are collected or calculated. We conclude with a detailed phenomenological study, finding an enhanced matching correction for high jet p T due to the electroweak collinear enhancement of a boson emission off di-jets. We also compare with the Pythia event generator, finding that our observable is very robust to hadronization and the underlying event.https://doi.org/10.1007/JHEP02(2023)256FactorizationRenormalization GroupJets and Jet SubstructureResummation |
| spellingShingle | Yang-Ting Chien Rudi Rahn Ding Yu Shao Wouter J. Waalewijn Bin Wu Precision boson-jet azimuthal decorrelation at hadron colliders Journal of High Energy Physics Factorization Renormalization Group Jets and Jet Substructure Resummation |
| title | Precision boson-jet azimuthal decorrelation at hadron colliders |
| title_full | Precision boson-jet azimuthal decorrelation at hadron colliders |
| title_fullStr | Precision boson-jet azimuthal decorrelation at hadron colliders |
| title_full_unstemmed | Precision boson-jet azimuthal decorrelation at hadron colliders |
| title_short | Precision boson-jet azimuthal decorrelation at hadron colliders |
| title_sort | precision boson jet azimuthal decorrelation at hadron colliders |
| topic | Factorization Renormalization Group Jets and Jet Substructure Resummation |
| url | https://doi.org/10.1007/JHEP02(2023)256 |
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