10.1140-epjc-s10052-015-3406-9.pdf (2.37 MB)
Observation and measurements of the production of prompt and non-prompt J? mesons in association with a Z boson in pp collisions at vs = 8 TeV with the ATLAS detector
journal contribution
posted on 2023-06-09, 05:46 authored by Benedict AllbrookeBenedict Allbrooke, Lily AsquithLily Asquith, Alessandro CerriAlessandro Cerri, C A Chavez Barajas, Antonella De SantoAntonella De Santo, Fabrizio SalvatoreFabrizio Salvatore, I Santoyo Castillo, K Suruliz, Mark SuttonMark Sutton, Iacopo Vivarelli, The ATLAS CollaborationThe production of a Z boson in association with a J/? 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 vs=8 TeV, the first measurement of associated Z+J/? production is presented for both prompt and non-prompt J/? production, with both signatures having a significance in excess of 5s. 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/?(?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? 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.
Funding
ATLAS; G0275; STFC-SCIENCE AND TECHNOLOGY FACILITIES COUNCIL; ST/I006048/1
History
Publication status
- Published
File Version
- Published version
Journal
European Physical Journal C: Particles and FieldsISSN
1434-6044Publisher
Springer VerlagExternal DOI
Issue
5Volume
75Article number
a229Department affiliated with
- Physics and Astronomy Publications
Research groups affiliated with
- Experimental Particle Physics Research Group Publications
Full text available
- Yes
Peer reviewed?
- Yes
Legacy Posted Date
2017-04-12First Open Access (FOA) Date
2017-04-12First Compliant Deposit (FCD) Date
2017-04-11Usage metrics
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