Comprehensive description of J/ψ production in proton-proton collisions at collider energies
We employ a small x color glass condensate (CGC)+ nonrelativistic QCD (NRQCD) formalism to compute J/ψ production at low p(⊥) in proton-proton collisions at collider energies. Very good agreement is obtained for total cross sections, rapidity distributions, and low momentum p(⊥) distributions. Simil...
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| Published in: | Physical review letters Vol. 113; no. 19; p. 192301 |
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| Main Authors: | , |
| Format: | Journal Article |
| Language: | English |
| Published: |
United States
American Physical Society (APS)
04-11-2014
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| Subjects: | |
| Online Access: | Get full text |
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| Summary: | We employ a small x color glass condensate (CGC)+ nonrelativistic QCD (NRQCD) formalism to compute J/ψ production at low p(⊥) in proton-proton collisions at collider energies. Very good agreement is obtained for total cross sections, rapidity distributions, and low momentum p(⊥) distributions. Similar agreement is obtained for ψ' production. We observe an overlap region in p(⊥) where our results match smoothly to those obtained in a next-to-leading order collinearly factorized NRQCD formalism. The relative contribution of color singlet and color octet contributions can be quantified in the CGC+NRQCD framework, with the former contributing approximately 10% of the total cross section. |
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| Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 BNL-107346-2015-JA SC00112704; AC02-98CH10886 USDOE Office of Science (SC), Nuclear Physics (NP) |
| ISSN: | 0031-9007 1079-7114 |
| DOI: | 10.1103/PhysRevLett.113.192301 |