Please use this identifier to cite or link to this item:
|Scopus||Web of Science®||Altmetric|
|Title:||Observation and measurements of the production of prompt and non-prompt Jψ mesons in association with a ZZ boson in pp collisions at √s=8TeV with the ATLAS detector|
|Other Titles:||Observation and measurements of the production of prompt and non-prompt Jpsi mesons in association with a ZZ boson in pp collisions at root s=8TeV with the ATLAS detector|
Abdel Khalek, S.
|Citation:||European Physical Journal C: Particles and Fields, 2015; 75(5):1-29|
|G. Aad … P. Jackson … L. Lee … A. Petridis … N. Soni ... M. White ... et al. (The ATLAS Collaboration)|
|Abstract:||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 s√=8TeV, 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 Jψ 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.|
|Rights:||© CERN for the benefit of the ATLAS collaboration 2015. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecomm ons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. Funded by SCOAP3.|
|Appears in Collections:||Physics publications|
Files in This Item:
|hdl_102716.pdf||Published version||2.45 MB||Adobe PDF||View/Open|
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.