EPS HEP 2015

Observation and measurements of the production of prompt and non-prompt J/ψ mesons in association with a Z boson in pp collisions at √s = 8 TeV with the ATLAS detector.

Not scheduled

20m

poster Flavour Physics and Fundamental Symmetries

Speaker

Stefanos Leontsinis (National Technical Univ. of Athens (GR))

Description

The associated production of vector boson with heavy quarkonia is a key observable for understanding the quarkonium production mechanisms. In this poster we present the first evidence of the production of the Z boson in association with a prompt and non-prompt J/ψ meson and measure its production rate in comparison of the inclusive Z production. Relative contributions to the signal from single and double parton scattering are estimated. We compare single parton scattering cross-sections to cutting-edge theoretical calculations in the colour singlet and colour octet formalisms. Finally, we extract a lower limit in the double parton scattering effective cross section.