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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

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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 Collaboration
The 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 Fields

ISSN

1434-6044

Publisher

Springer Verlag

Issue

5

Volume

75

Article number

a229

Department 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

2017-04-12

First Open Access (FOA) Date

2017-04-12

First Compliant Deposit (FCD) Date

2017-04-11

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