IFLP   13074
INSTITUTO DE FISICA LA PLATA
Unidad Ejecutora - UE
artículos
Título:
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
Autor/es:
ATLAS COLLABORATION, G. AAD, F. MONTICELLI, ET AL
Revista:
JOURNAL OF HIGH ENERGY PHYSICS
Editorial:
SPRINGER
Referencias:
Lugar: Berlin; Año: 2014 vol. 231 p. 1 - 23
ISSN:
1126-6708
Resumen:
The process pp →W ± J/ψ provides a powerful probe of the production mechanism of charmoniumin 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 s = 7 TeV pp collisions at the LHC, the first observationis made of the production of W ± + prompt J/ψ events in hadronic collisions, using W ± → μνμ andJ/ψ → μ + μ − . A yield of 27.4+7.5 W ± + prompt J/ψ events is observed, with a statistical significance of−6.55.1σ . The production rate as a ratio to the inclusive W ± boson production rate is measured, and thedouble parton scattering contribution to the cross section is estimated.