Measurement of the production cross section of prompt j/psi mesons in association with a W (+/-) boson in pp collisions root s=7 TeV with the ATLAS detector
2014 (English)In: Journal of High Energy Physics (JHEP), ISSN 1029-8479, E-ISSN 1126-6708, no 4, 172- p.Article in journal (Refereed) Published
The process pp -> W (+/-) J/psi 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 root s= 7 TeV pp collisions at the LHC, the first observation is made of the production of W (+/-) + prompt J/psi events in hadronic collisions, using W (+/-) -> mu nu(mu) and J/psi -> mu(+)mu(-) center dot A yield of W (+/-) + prompt J/psi events is observed, with a statistical significance of 5.1 sigma. 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.
Place, publisher, year, edition, pages
2014. no 4, 172- p.
IdentifiersURN: urn:nbn:se:kth:diva-146229DOI: 10.1007/JHEP04(2014)172ISI: 000335732000001ScopusID: 2-s2.0-84901707109OAI: oai:DiVA.org:kth-146229DiVA: diva2:723049
QC 20140610. Author count: 2913.2014-06-102014-06-102014-06-10Bibliographically approved