| 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.contributor.author |
CDF collaboration |
|
| dc.date.accessioned |
2011-01-04T09:45:01Z |
|
| dc.date.available |
2011-01-04T09:45:01Z |
|
| dc.date.issued |
2009 |
|
| dc.identifier.citation |
Aaltonen , T , Mehtala , P , Orava , R , Maki , T , Saarikko , H , Osterberg , K & CDF collaboration 2009 , ' Observation of Exclusive Charmonium Production and γγ→μ+μ- in pp̅ Collisions at √s=1.96 TeV ' , Physical Review Letters , vol 102 , no. 24 , 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/10138/24421 |
|
| dc.description.abstract |
In CDF we have observed the reactions p+p̅ →p+X+p̅ , with X being a centrally produced J/ψ, ψ(2S), or χc0, and γγ→μ+μ- in pp̅ collisions at √s=1.96 TeV. The event signature requires two oppositely charged central muons, and either no other particles or one additional photon detected. Exclusive vector meson production is as expected for elastic photoproduction, γ+p→J/ψ(ψ(2S))+p, observed here for the first time in hadron-hadron collisions. We also observe exclusive χc0→J/ψ+γ. The cross sections dσ/dy|y=0 for J/ψ, ψ(2S), and χc0 are 3.92±0.25(stat)±0.52(syst) nb, 0.53±0.09(stat)±0.10(syst) nb, and 76±10(stat)±10(syst) nb, respectively, and the continuum is consistent with QED. We put an upper limit on the cross section for Odderon exchange in exclusive J/ψ production. |
en |
| dc.format.extent |
7 |
|
| dc.language.iso |
eng |
|
| dc.publisher |
American Institute of Physics |
|
| dc.relation.ispartof |
Physical Review Letters |
|
| dc.relation.uri |
http://prl.aps.org/pdf/PRL/v102/i24/e242001 |
|
| dc.subject |
hep-ex |
en |
| dc.subject |
114 Physical sciences |
en |
| dc.title |
Observation of Exclusive Charmonium Production and γγ→μ+μ- in pp̅ Collisions at √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 |
|
