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Observation of exclusive charmonium production and gamma+gamma to mu+mu- in p+pbar collisions at sqrt{s} = 1.96 TeV

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dc.contributor University of Helsinki, Department of Physics en
dc.contributor University of Helsinki, Helsinki Institute of Physics en
dc.contributor University of Helsinki, Department of Physics en
dc.contributor University of Helsinki, Helsinki Institute of Physics (HIP) (-2009) en
dc.contributor University of Helsinki, Department of Physics en
dc.contributor University of Helsinki, Department of Physics en
dc.contributor.author Aaltonen, T.
dc.contributor.author Mehtala, P.
dc.contributor.author Orava, R.
dc.contributor.author Maki, T.
dc.contributor.author Saarikko, H.
dc.contributor.author Osterberg, K.
dc.date.accessioned 2010-11-29T22:05:01Z
dc.date.available 2010-11-29T22:05:01Z
dc.date.issued 2009
dc.identifier.citation Aaltonen , T , Mehtala , P , Orava , R , Maki , T , Saarikko , H & Osterberg , K 2009 , ' Observation of exclusive charmonium production and gamma+gamma to mu+mu- in p+pbar collisions at sqrt{s} = 1.96 TeV ' , Physical Review Letters , vol 102 , pp. 242001 . en
dc.identifier.issn 0031-9007
dc.identifier.other PURE: 9383803
dc.identifier.other ArXiv: http://arxiv.org/abs/0902.1271v4
dc.identifier.uri http://hdl.handle.net/10138/23598
dc.description.abstract We have observed the reactions p+pbar --> p+X+pbar, with X being a centrally produced J/psi, psi(2S) or chi_c0, and gamma+gamma --> mu+mu-, in proton- antiproton collisions at sqrt{s} = 1.96 TeV using the Run II Collider Detector at Fermilab. The event signature requires two oppositely charged muons, each with pseudorapidity |eta| mu+mu-. Events with a J/psi and an associated photon candidate are consistent with exclusive chi_c0 production through double pomeron exchange. The exclusive vector meson production is as expected for elastic photo- production, gamma+p --> J/psi(psi(2S)) + p, which is observed here for the first time in hadron-hadron collisions. The cross sections ds/dy(y=0) for p + pbar --> p + X + pbar with X = J/psi, psi(2S) orchi_c0 are 3.92+/-0.62 nb, 0.53+/-0.14 nb, and 75+/-14 nb respectively. The cross section for the continuum, with |eta(mu+/-)| fi
dc.format.extent 7
dc.language.iso eng
dc.publisher American Institute of Physics
dc.relation.ispartof Physical Review Letters
dc.subject hep-ex en
dc.subject 114 Physical sciences en
dc.title Observation of exclusive charmonium production and gamma+gamma to mu+mu- in p+pbar collisions at sqrt{s} = 1.96 TeV en
dc.title.alternative Observation of exclusive charmonium production and gamma+gamma to mu+mu- in p+pbar collisions at sqrt{s} = 1.96 TeV en
dc.type A1 Refereed journal article
dc.identifier.doi http://dx.doi.org/10.1103/PhysRevLett.102.242001
dc.type.dcmitype document
dc.type.uri info:eu-repo/semantics/article
dc.contributor.uhperson Aaltonen, T.
dc.contributor.uhperson Mehtala, P.
dc.contributor.uhperson Orava, R.
dc.contributor.uhperson Maki, T.
dc.contributor.uhperson Saarikko, H.
dc.contributor.uhperson Osterberg, K.

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