Measurement of the ratio of prompt χc to J/ψ production in pp collisions at √s=7TeV
The prompt production of charmoniumχcandJ/ψstates is studied in proton–proton collisionsat a centre-of-mass energy of√s=7 TeV at the Large Hadron Collider. TheχcandJ/ψmesonsare identified through their decaysχc→J/ψγandJ/ψ→μ+μ−using 36 pb−1of data collectedby the LHCb detector in 2010. The ratio of t...
| Autores: | , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2012 |
| País: | España |
| Institución: | Universitat Ramon Llull (URL) |
| Repositorio: | DAU Arxiu Digital de la Universitat Ramon Llull |
| OAI Identifier: | oai:dau.url.edu:20.500.14342/3138 |
| Acceso en línea: | http://hdl.handle.net/20.500.14342/3138 https://doi.org/10.1016/j.physletb.2012.10.068 |
| Access Level: | acceso abierto |
| Palabra clave: | Gran col·lisionador d'hadrons (França i Suïssa) Partícules (Física nuclear) Col·lisions (Física nuclear) Protons 539 |
| Sumario: | The prompt production of charmoniumχcandJ/ψstates is studied in proton–proton collisionsat a centre-of-mass energy of√s=7 TeV at the Large Hadron Collider. TheχcandJ/ψmesonsare identified through their decaysχc→J/ψγandJ/ψ→μ+μ−using 36 pb−1of data collectedby the LHCb detector in 2010. The ratio of the prompt production cross-sections forχcandJ/ψ,σ(χc→J/ψγ)/σ(J/ψ), is determined as a function of theJ/ψtransverse momentum in the range2<pJ/ψT<15 GeV/c. The results are in excellent agreement with next-to-leading order non-relativisticexpectations and show a significant discrepancy compared with the colour singlet model prediction atleading order, especially in the lowpJ/ψTregion. |
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