Observation and measurements of the production of prompt and non-prompt J/ψ mesons in association with a Z boson in pp collisions at \(\sqrt {s}\)=8 TeV with the ATLAS detector
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- The production of a Z boson in association with a J/ψ meson in proton–proton collisions probes the production mechanisms of quarkonium and heavy flavour in association with vector bosons, and allows studies of multiple parton scattering. Using 20.3fb\(^{−1}\) of data collected with the ATLAS experiment at the LHC in pp collisions at \(\sqrt {s}\) = 8 TeV, the first measurement of associated Z+J/ψ production is presented for both prompt and non-prompt J/ψ production, with both signatures having a significance in excess of 5σ. The inclusiveThe production of a Z boson in association with a J/ψ meson in proton–proton collisions probes the production mechanisms of quarkonium and heavy flavour in association with vector bosons, and allows studies of multiple parton scattering. Using 20.3fb\(^{−1}\) of data collected with the ATLAS experiment at the LHC in pp collisions at \(\sqrt {s}\) = 8 TeV, the first measurement of associated Z+J/ψ production is presented for both prompt and non-prompt J/ψ production, with both signatures having a significance in excess of 5σ. The inclusive production cross-sections for Z boson production (analysed in μ\(^{+}\)μ\(^{−}\) or e\(^{+}\)e\(^{−}\) decay modes) in association with prompt and non-prompt J/ψ(→μ\(^{+}\)μ\(^{−}\)) are measured relative to the inclusive production rate of Z bosons in the same fiducial volume to be (36.8±6.7±2.5)×10\(^{−7}\) and (65.8±9.2±4.2)×10\(^{−7}\) respectively. Normalised differential production cross-section ratios are also determined as a function of the J/ψ transverse momentum. The fraction of signal events arising from single and double parton scattering is estimated, and a lower limit of 5.3 (3.7)mb at 68 (95)% confidence level is placed on the effective cross-section regulating double parton interactions.…
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| URN: | urn:nbn:de:bvb:20-opus-149970 |
|---|---|
| Dokumentart: | Artikel / Aufsatz in einer Zeitschrift |
| Institute der Universität: | Fakultät für Physik und Astronomie / Physikalisches Institut |
| Sprache der Veröffentlichung: | Englisch |
| Titel des übergeordneten Werkes / der Zeitschrift (Englisch): | European Physical Journal C: Particles and Fields |
| Erscheinungsjahr: | 2015 |
| Band / Jahrgang: | 75 |
| Heft / Ausgabe: | 5 |
| Seitenangabe: | 229 |
| Originalveröffentlichung / Quelle: | European Physical Journal C: Particles and Fields (2015) 75(5):229. DOI: 10.1140/epjc/s10052-015-3406-9 |
| DOI: | https://doi.org/10.1140/epjc/s10052-015-3406-9 |
| PubMed-ID: | https://pubmed.ncbi.nlm.nih.gov/PMC4445993 |
| Allgemeine fachliche Zuordnung (DDC-Klassifikation): | 5 Naturwissenschaften und Mathematik / 53 Physik / 539 Moderne Physik |
| Freie Schlagwort(e): | ATLAS detector; Z boson; proton-proton-collision |
| Datum der Freischaltung: | 29.01.2019 |
| Urhebende Körperschaft: | ATLAS Collaboration |
| Lizenz (Deutsch): |  CC BY: Creative-Commons-Lizenz: Namensnennung 4.0 International |