Measurement of the production cross section of prompt J/psi mesons in association with a W boson in pp collisions at sqrt(s)=7 TeV with the ATLAS detector

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• Constantinos Melachrinos (University of Chicago)
• Tuesday 21 January 2014, 17:00-18:00
• Large Lecture Theatre (S02, Poynting).

If you have a question about this talk, please contact Prof Ian Kenyon.

Note unusual day of week, time and location

The process pp → W^± J/ψ provides a powerful probe of the production mechanism of charmonium in hadronic collisions, and is also sensitive to multiple parton interactions in the colliding protons. Using the 2011 ATLAS dataset of 4.5 fb⁻¹ of sqrt(s) = 7 TeV pp collisions at the LHC , the first observation is made of the production of W^± in association with prompt J/ψ events in hadronic collisions, using W^± → μ ν_μ and J/ψ → μμ⁻. A yield of 27.4 +7.5 -6.5 W^± prompt J/ψ events is observed, with a statistical significance of 5.1σ. The production rate as a ratio to the inclusive W^± boson production rate is measured, and the double parton scattering contribution to the cross section is estimated.

This talk is part of the Particle Physics Seminars series.

This talk is included in these lists:

• Bham Talks
• Large Lecture Theatre (S02, Poynting)
• Particle Physics Seminars
• What's on in Physics?

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