Azimuthal anisotropy at high transverse momentum in p-p and p-A collisions
We explore the possibility that the initial transverse momentum distribution of unpolarized and polarized partons within unpolarized nucleons, both with and without the anisotropy of unpolarized hadrons produced in the fragmentation of outgoing partons, could lead to the observed azimuthal anisotrop...
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| Format: | Article |
| Language: | English |
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Elsevier
2024-12-01
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| Series: | Physics Letters B |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269324006634 |
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| author | Ismail Soudi Abhijit Majumder |
| author_facet | Ismail Soudi Abhijit Majumder |
| author_sort | Ismail Soudi |
| collection | DOAJ |
| description | We explore the possibility that the initial transverse momentum distribution of unpolarized and polarized partons within unpolarized nucleons, both with and without the anisotropy of unpolarized hadrons produced in the fragmentation of outgoing partons, could lead to the observed azimuthal anisotropy of high transverse momentum (high-pT) hadrons produced in high energy proton-proton (p-p) or proton-ion (p-A) collisions. Including simple Gaussian forms for transverse momentum dependent parton distribution functions (PDF) and fragmentation functions, and assuming an A1/3 enhancement of a PDF in p-Pb collisions, we show that the observed anisotropy, with no modification to the angle integrated spectra (RpA=1) for 5 GeV ≲pT≲50 GeV, can be straightforwardly understood as arising from a few processes dominated by gluon-gluon to gluon-gluon scattering. |
| format | Article |
| id | doaj-art-28b0a4a6ca3e4d0799d984849fc68c6e |
| institution | OA Journals |
| issn | 0370-2693 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Physics Letters B |
| spelling | doaj-art-28b0a4a6ca3e4d0799d984849fc68c6e2025-08-20T02:07:34ZengElsevierPhysics Letters B0370-26932024-12-0185913910510.1016/j.physletb.2024.139105Azimuthal anisotropy at high transverse momentum in p-p and p-A collisionsIsmail Soudi0Abhijit Majumder1Corresponding author.; Department of Physics and Astronomy, Wayne State University, Detroit, MI 48201, United States of AmericaDepartment of Physics and Astronomy, Wayne State University, Detroit, MI 48201, United States of AmericaWe explore the possibility that the initial transverse momentum distribution of unpolarized and polarized partons within unpolarized nucleons, both with and without the anisotropy of unpolarized hadrons produced in the fragmentation of outgoing partons, could lead to the observed azimuthal anisotropy of high transverse momentum (high-pT) hadrons produced in high energy proton-proton (p-p) or proton-ion (p-A) collisions. Including simple Gaussian forms for transverse momentum dependent parton distribution functions (PDF) and fragmentation functions, and assuming an A1/3 enhancement of a PDF in p-Pb collisions, we show that the observed anisotropy, with no modification to the angle integrated spectra (RpA=1) for 5 GeV ≲pT≲50 GeV, can be straightforwardly understood as arising from a few processes dominated by gluon-gluon to gluon-gluon scattering.http://www.sciencedirect.com/science/article/pii/S0370269324006634 |
| spellingShingle | Ismail Soudi Abhijit Majumder Azimuthal anisotropy at high transverse momentum in p-p and p-A collisions Physics Letters B |
| title | Azimuthal anisotropy at high transverse momentum in p-p and p-A collisions |
| title_full | Azimuthal anisotropy at high transverse momentum in p-p and p-A collisions |
| title_fullStr | Azimuthal anisotropy at high transverse momentum in p-p and p-A collisions |
| title_full_unstemmed | Azimuthal anisotropy at high transverse momentum in p-p and p-A collisions |
| title_short | Azimuthal anisotropy at high transverse momentum in p-p and p-A collisions |
| title_sort | azimuthal anisotropy at high transverse momentum in p p and p a collisions |
| url | http://www.sciencedirect.com/science/article/pii/S0370269324006634 |
| work_keys_str_mv | AT ismailsoudi azimuthalanisotropyathightransversemomentuminppandpacollisions AT abhijitmajumder azimuthalanisotropyathightransversemomentuminppandpacollisions |