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Relation between the parton branching approach and Catani-Ciafaloni-Fiorani-Marchesini evolutionстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Web of Science
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 17 июля 2020 г.
- Авторы: Lipatov A.V., Malyshev M.A., Jung H.
- Журнал: Physical Review D
- Том: 101
- Год издания: 2020
- Издательство: American Physical Society
- Местоположение издательства: United States
- Первая страница: 034022
- DOI: 10.1103/PhysRevD.101.034022
- Аннотация: We consider the associated production of electroweak gauge bosons and charm or beauty quark jets at the LHC using the kT-factorization framework. We apply the transverse momentum dependent (TMD) parton distributions in a proton obtained from the Parton Branching (PB) method as well as from the Catani-Ciafaloni-Fiorani-Marchesini (CCFM) evolution equation. For the PB approach, our prescription merges the standard leading order O(ααs) kT-factorization calculations with several tree-level next-to-leading order O(αα2s) off-shell production amplitudes. For the CCFM scenario, our consideration is based on the O(αα2s) off-shell gluon-gluon fusion subprocess g∗g∗→Z/W+QQ¯ and some subleading O(αα2s) subprocesses involving quark interactions, taken into account in conventional (collinear) QCD factorization. We find that the W+c and Z+b cross sections, calculated within the PB and CCFM-based schemes with the proper choice of leading and next-to-leading subprocesses, are in good agreement with each other, thus establishing a correspondence between these two scenarios. A comparison with the latest LHC experimental data is given and the necessity for the proper off-shell treatment of the production amplitudes in determination of the parameters of the TMD parton density is demonstrated.
- Добавил в систему: Малышев Максим Алексеевич
Прикрепленные файлы
| № | Имя | Описание | Имя файла | Размер | Добавлен |
|---|---|---|---|---|---|
| 1. | Полный текст | PhysRevD.101.034022.pdf | 1,3 МБ | 16 ноября 2020 [maximmalyshev] |