Title
|
|
|
|
Observation of exclusive charmonium production and in collisions at =1.96 TeV
| |
Author
|
|
|
|
| |
Institution/Organisation
|
|
|
|
CDF Collaboration
| |
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. |
| |
Language
|
|
|
|
English
| |
Source (journal)
|
|
|
|
Physical review letters. - New York, N.Y., 1958, currens
| |
Publication
|
|
|
|
New York, N.Y.
:
American Physical Society
,
2009
| |
ISSN
|
|
|
|
0031-9007
[print]
1079-7114
[online]
| |
Volume/pages
|
|
|
|
102
:24
(2009)
, p. 242001,1-242001,7
| |
ISI
|
|
|
|
000267197900016
| |
Full text (Publisher's DOI)
|
|
|
|
| |
Full text (open access)
|
|
|
|
| |
|