Inclusive production of J/ψ and ψ′ mesons at the LHC
We discuss the prompt production of J/ψ mesons in proton-proton collisions at the LHC within a NRQCD kt-factorization approach using Kimber-Martin-Ryskin (KMR) unintegrated gluon distributions (UGDF). We include both direct color-singlet production (gg → J/ψg) as well as a feed-down from χc → J/ψγ a...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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EDP Sciences
2016-01-01
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| Series: | EPJ Web of Conferences |
| Online Access: | http://dx.doi.org/10.1051/epjconf/201613005003 |
| _version_ | 1818600723611385856 |
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| author | Cisek Anna Szczurek Antoni |
| author_facet | Cisek Anna Szczurek Antoni |
| author_sort | Cisek Anna |
| collection | DOAJ |
| description | We discuss the prompt production of J/ψ mesons in proton-proton collisions at the LHC within a NRQCD kt-factorization approach using Kimber-Martin-Ryskin (KMR) unintegrated gluon distributions (UGDF). We include both direct color-singlet production (gg → J/ψg) as well as a feed-down from χc → J/ψγ and ψ′ → J/ψX. The production of the decaying mesons (χc or ψ′) is also calculated within NRQCD ktfactorization. The corresponding matrix elements for gg → J/ψ, gg → ψ′ and gg → χc include parameters of the nonrelativistic spatial wave functions of quarkonia at r = 0, which are taken from potential models from the literature. We get the ratio of the corresponding of the cross sections for χc(2)-to-χc(1) much closer to experimental data than obtained in recent analyses. Differential distributions in rapidity of J/ψ and ψ′ are calculated and compared to experimental data of the ALICE and LHCb collaborations. We discuss possible onset of gluon saturation effects at forward/backward rapidities. One can describe the experimental data for J/ψ production within model uncertainties with color-singlet component only. Therefore our theoretical results leave only a relatively small room for the color-octet contributions. |
| first_indexed | 2024-12-16T12:40:01Z |
| format | Article |
| id | doaj.art-4497a952e4624e3a8de05916aa6c9c7d |
| institution | Directory Open Access Journal |
| issn | 2100-014X |
| language | English |
| last_indexed | 2024-12-16T12:40:01Z |
| publishDate | 2016-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | EPJ Web of Conferences |
| spelling | doaj.art-4497a952e4624e3a8de05916aa6c9c7d2022-12-21T22:31:27ZengEDP SciencesEPJ Web of Conferences2100-014X2016-01-011300500310.1051/epjconf/201613005003epjconf_meson2016_05003Inclusive production of J/ψ and ψ′ mesons at the LHCCisek Anna0Szczurek AntoniUniversity of RzeszówWe discuss the prompt production of J/ψ mesons in proton-proton collisions at the LHC within a NRQCD kt-factorization approach using Kimber-Martin-Ryskin (KMR) unintegrated gluon distributions (UGDF). We include both direct color-singlet production (gg → J/ψg) as well as a feed-down from χc → J/ψγ and ψ′ → J/ψX. The production of the decaying mesons (χc or ψ′) is also calculated within NRQCD ktfactorization. The corresponding matrix elements for gg → J/ψ, gg → ψ′ and gg → χc include parameters of the nonrelativistic spatial wave functions of quarkonia at r = 0, which are taken from potential models from the literature. We get the ratio of the corresponding of the cross sections for χc(2)-to-χc(1) much closer to experimental data than obtained in recent analyses. Differential distributions in rapidity of J/ψ and ψ′ are calculated and compared to experimental data of the ALICE and LHCb collaborations. We discuss possible onset of gluon saturation effects at forward/backward rapidities. One can describe the experimental data for J/ψ production within model uncertainties with color-singlet component only. Therefore our theoretical results leave only a relatively small room for the color-octet contributions.http://dx.doi.org/10.1051/epjconf/201613005003 |
| spellingShingle | Cisek Anna Szczurek Antoni Inclusive production of J/ψ and ψ′ mesons at the LHC EPJ Web of Conferences |
| title | Inclusive production of J/ψ and ψ′ mesons at the LHC |
| title_full | Inclusive production of J/ψ and ψ′ mesons at the LHC |
| title_fullStr | Inclusive production of J/ψ and ψ′ mesons at the LHC |
| title_full_unstemmed | Inclusive production of J/ψ and ψ′ mesons at the LHC |
| title_short | Inclusive production of J/ψ and ψ′ mesons at the LHC |
| title_sort | inclusive production of j ψ and ψ mesons at the lhc |
| url | http://dx.doi.org/10.1051/epjconf/201613005003 |
| work_keys_str_mv | AT cisekanna inclusiveproductionofjpsandpsmesonsatthelhc AT szczurekantoni inclusiveproductionofjpsandpsmesonsatthelhc |