Pion nucleus Drell–Yan process and parton transverse momentum in the pion
Abstract We present a thorough analysis of unpolarized Drell–Yan (DY) pair production in pion–nucleus scattering. On the nucleus side, we use nuclear parton distributions along with parametrisations of the nucleon partonic transverse distribution available in the literature. Partonic longitudinal an...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2018-08-01
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| Series: | European Physical Journal C: Particles and Fields |
| Online Access: | http://link.springer.com/article/10.1140/epjc/s10052-018-6115-3 |
| _version_ | 1811209574194085888 |
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| author | Federico Alberto Ceccopieri Aurore Courtoy Santiago Noguera Sergio Scopetta |
| author_facet | Federico Alberto Ceccopieri Aurore Courtoy Santiago Noguera Sergio Scopetta |
| author_sort | Federico Alberto Ceccopieri |
| collection | DOAJ |
| description | Abstract We present a thorough analysis of unpolarized Drell–Yan (DY) pair production in pion–nucleus scattering. On the nucleus side, we use nuclear parton distributions along with parametrisations of the nucleon partonic transverse distribution available in the literature. Partonic longitudinal and transverse distributions of the pion are those obtained in a recent calculation in a Nambu–Jona Lasinio (NJL) framework, with Pauli–Villars regularization. The scale of the NJL model is determined with a minimisation procedure comparing NLO predictions based on NJL evolved pion distributions to rapidity differential DY cross sections data. The resulting distributions are then used to describe, up to next-to-leading logarithmic accuracy, the transverse momentum spectrum of dilepton pairs up to a transverse momentum of 2 GeV. With no additional parameters, fair agreement is found with available pion–nucleus data, confirming the virtues of the NJL description of pion parton structure. We find sizable evolution effects on the shape of the distributions and on the generated average transverse momentum of the dilepton pair. We furthermore discuss the possibility of gaining information about the behavior of the pion unpolarized transverse momentum dependent parton distribution from pion nucleus DY data. |
| first_indexed | 2024-04-12T04:41:54Z |
| format | Article |
| id | doaj.art-0e19e013ce114c6da3e33870cda80787 |
| institution | Directory Open Access Journal |
| issn | 1434-6044 1434-6052 |
| language | English |
| last_indexed | 2024-04-12T04:41:54Z |
| publishDate | 2018-08-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | European Physical Journal C: Particles and Fields |
| spelling | doaj.art-0e19e013ce114c6da3e33870cda807872022-12-22T03:47:35ZengSpringerOpenEuropean Physical Journal C: Particles and Fields1434-60441434-60522018-08-0178811210.1140/epjc/s10052-018-6115-3Pion nucleus Drell–Yan process and parton transverse momentum in the pionFederico Alberto Ceccopieri0Aurore Courtoy1Santiago Noguera2Sergio Scopetta3IFPA, Université de LiègeInstituto de Física, Universidad Nacional Autónoma de MéxicoDepartament de Fisica Teòrica and IFIC, Universitat de València-CSICDipartimento di Fisica e Geologia, Università degli Studi di PerugiaAbstract We present a thorough analysis of unpolarized Drell–Yan (DY) pair production in pion–nucleus scattering. On the nucleus side, we use nuclear parton distributions along with parametrisations of the nucleon partonic transverse distribution available in the literature. Partonic longitudinal and transverse distributions of the pion are those obtained in a recent calculation in a Nambu–Jona Lasinio (NJL) framework, with Pauli–Villars regularization. The scale of the NJL model is determined with a minimisation procedure comparing NLO predictions based on NJL evolved pion distributions to rapidity differential DY cross sections data. The resulting distributions are then used to describe, up to next-to-leading logarithmic accuracy, the transverse momentum spectrum of dilepton pairs up to a transverse momentum of 2 GeV. With no additional parameters, fair agreement is found with available pion–nucleus data, confirming the virtues of the NJL description of pion parton structure. We find sizable evolution effects on the shape of the distributions and on the generated average transverse momentum of the dilepton pair. We furthermore discuss the possibility of gaining information about the behavior of the pion unpolarized transverse momentum dependent parton distribution from pion nucleus DY data.http://link.springer.com/article/10.1140/epjc/s10052-018-6115-3 |
| spellingShingle | Federico Alberto Ceccopieri Aurore Courtoy Santiago Noguera Sergio Scopetta Pion nucleus Drell–Yan process and parton transverse momentum in the pion European Physical Journal C: Particles and Fields |
| title | Pion nucleus Drell–Yan process and parton transverse momentum in the pion |
| title_full | Pion nucleus Drell–Yan process and parton transverse momentum in the pion |
| title_fullStr | Pion nucleus Drell–Yan process and parton transverse momentum in the pion |
| title_full_unstemmed | Pion nucleus Drell–Yan process and parton transverse momentum in the pion |
| title_short | Pion nucleus Drell–Yan process and parton transverse momentum in the pion |
| title_sort | pion nucleus drell yan process and parton transverse momentum in the pion |
| url | http://link.springer.com/article/10.1140/epjc/s10052-018-6115-3 |
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