Multiparticle production in proton–nucleus collisions beyond eikonal accuracy
Abstract We study the effects on multigluon production at mid-rapidity in the Color Glass Condensate of the non-eikonal corrections that stem from relaxing the shockwave approximation and giving the target a finite size. We extend previous works performed in the dilute-dilute approximation suitable...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2022-11-01
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| Series: | European Physical Journal C: Particles and Fields |
| Online Access: | https://doi.org/10.1140/epjc/s10052-022-10962-1 |
| _version_ | 1797983585503805440 |
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| author | Pedro Agostini Tolga Altinoluk Néstor Armesto Fabio Dominguez José Guilherme Milhano |
| author_facet | Pedro Agostini Tolga Altinoluk Néstor Armesto Fabio Dominguez José Guilherme Milhano |
| author_sort | Pedro Agostini |
| collection | DOAJ |
| description | Abstract We study the effects on multigluon production at mid-rapidity in the Color Glass Condensate of the non-eikonal corrections that stem from relaxing the shockwave approximation and giving the target a finite size. We extend previous works performed in the dilute-dilute approximation suitable for proton–proton collisions, to the dilute-dense one applicable to proton–nucleus. We employ the McLerran–Venugopalan model for the projectile averages. For the target averages, we use the Golec-Biernat–Wüsthoff model and restrict to the leading contributions in overlap area that allow a factorization of ensembles of Wilson lines into products of dipoles. We make the connection with the jet quenching formalism and compare with previous results in the literature, providing a parametrization of the so-called decorated dipoles. We show that the non-eikonal effects on single inclusive particle production, contrary to what happens in jet quenching, are only sizable, of a few percent, for modest energies $$\sqrt{s_{NN}}\le 100$$ s NN ≤ 100 GeV and central rapidities. On the other hand, we find that the effects on double inclusive gluon production are larger for the same kinematics. We show that, as found previously in the dilute-dilute situation, non-eikonal corrections break the accidental symmetry in the CGC, allowing for the existence of non-vanishing odd azimuthal harmonics. |
| first_indexed | 2024-04-11T06:48:31Z |
| format | Article |
| id | doaj.art-e542a7f29e084a969af8de608a03522b |
| institution | Directory Open Access Journal |
| issn | 1434-6052 |
| language | English |
| last_indexed | 2024-04-11T06:48:31Z |
| publishDate | 2022-11-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | European Physical Journal C: Particles and Fields |
| spelling | doaj.art-e542a7f29e084a969af8de608a03522b2022-12-22T04:39:17ZengSpringerOpenEuropean Physical Journal C: Particles and Fields1434-60522022-11-01821112510.1140/epjc/s10052-022-10962-1Multiparticle production in proton–nucleus collisions beyond eikonal accuracyPedro Agostini0Tolga Altinoluk1Néstor Armesto2Fabio Dominguez3José Guilherme Milhano4Departamento de Física de Partículas and IGFAE, Universidade de Santiago de CompostelaTheoretical Physics Division, National Centre for Nuclear ResearchDepartamento de Física de Partículas and IGFAE, Universidade de Santiago de CompostelaDepartamento de Física de Partículas and IGFAE, Universidade de Santiago de CompostelaLaboratório de Instrumentação e Física Experimental de Partículas (LIP)Abstract We study the effects on multigluon production at mid-rapidity in the Color Glass Condensate of the non-eikonal corrections that stem from relaxing the shockwave approximation and giving the target a finite size. We extend previous works performed in the dilute-dilute approximation suitable for proton–proton collisions, to the dilute-dense one applicable to proton–nucleus. We employ the McLerran–Venugopalan model for the projectile averages. For the target averages, we use the Golec-Biernat–Wüsthoff model and restrict to the leading contributions in overlap area that allow a factorization of ensembles of Wilson lines into products of dipoles. We make the connection with the jet quenching formalism and compare with previous results in the literature, providing a parametrization of the so-called decorated dipoles. We show that the non-eikonal effects on single inclusive particle production, contrary to what happens in jet quenching, are only sizable, of a few percent, for modest energies $$\sqrt{s_{NN}}\le 100$$ s NN ≤ 100 GeV and central rapidities. On the other hand, we find that the effects on double inclusive gluon production are larger for the same kinematics. We show that, as found previously in the dilute-dilute situation, non-eikonal corrections break the accidental symmetry in the CGC, allowing for the existence of non-vanishing odd azimuthal harmonics.https://doi.org/10.1140/epjc/s10052-022-10962-1 |
| spellingShingle | Pedro Agostini Tolga Altinoluk Néstor Armesto Fabio Dominguez José Guilherme Milhano Multiparticle production in proton–nucleus collisions beyond eikonal accuracy European Physical Journal C: Particles and Fields |
| title | Multiparticle production in proton–nucleus collisions beyond eikonal accuracy |
| title_full | Multiparticle production in proton–nucleus collisions beyond eikonal accuracy |
| title_fullStr | Multiparticle production in proton–nucleus collisions beyond eikonal accuracy |
| title_full_unstemmed | Multiparticle production in proton–nucleus collisions beyond eikonal accuracy |
| title_short | Multiparticle production in proton–nucleus collisions beyond eikonal accuracy |
| title_sort | multiparticle production in proton nucleus collisions beyond eikonal accuracy |
| url | https://doi.org/10.1140/epjc/s10052-022-10962-1 |
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