# Journal article

## Precision measurement of the X(3872) mass in J/psi pi(+) pi(-) decays.

Abstract:

We present an analysis of the mass of the X(3872) reconstructed via its decay to J/psi pi(+)pi(-) using 2.4 fb(-1) of integrated luminosity from pp collisions at square root(s)=1.96 TeV, collected with the CDF II detector at the Fermilab Tevatron. The possible existence of two nearby mass states is investigated. Within the limits of our experimental resolution the data are consistent with a single state, and having no evidence for two states we set upper limits on the mass difference between ...

Publication status:
Published

### Authors

Journal:
Physical Review Letters
Volume:
103
Issue:
15
Pages:
152001
Publication date:
2009-10-01
DOI:
EISSN:
1079-7114
ISSN:
0031-9007
Language:
English
Keywords:
Pubs id:
pubs:28880
UUID:
uuid:0378b8a2-5c47-49af-89ae-bd1383c8d78b
Local pid:
pubs:28880
Source identifiers:
28880
Deposit date:
2012-12-19