PUB-05/038 Study of the X(3872) and Y(4260) in B0 -> J/psi pi+ pi- K0 and B- -> J/psi pi+ pi- K- decays |
Doc Type |
Journal Papers |
Record Created |
July 1, 2005 |
SLAC-PUB |
Preprint # |
hep-ex/0507090 |
Abstract |
content_type = "text/plain"
user_agent = "claudebot"
moz = "claudebot"
moz_version = ""
We present results of a search for the X(3872) in B0 --> X(3872) K0_S, X(3872) --> J/\psi pi+ pi-, improved measurements of B- --> X(3872) K-, and a study of the J/psi pi+ pi- mass region above the X(3872). We use 232 million BBbar pairs collected at the Upsilon(4S) resonance with the BaBar detector at the PEP-II e+e- asymmetric-energy storage rings. The results include the 90% confidence interval 1.34 x 10^{-6} < BR(B0 --> X(3872)K0, X --> J/psi pi+ pi-) < 10.3 x 10^{-6} and the branching fraction BR(B- --> X(3872)K-, X --> J/psi pi+ pi-)=(10.1\pm 2.5\pm 1.0) x 10^{-6}. We observe a (2.7\pm 1.3 \pm 0.2) MeV/c^2 mass difference of the X(3872) produced in the two decay modes. Furthermore, we find an excess of J/psi pi+ pi- events with an invariant mass just above 4.2 GeV/c^2 that is consistent with recent observations in initial state radiation events.
|
Revisions and Files |
2 revised December 7, 2005
File Date Thumbnails | File Name |
File Type |
File Format |
File Size (Kb) |
Comments |
08-DEC-2005 |
babar-pub-05-038.pdf |
Paper (journal paper or conference submission by BABAR Collaboration) |
pdf |
162.92 |
|
08-DEC-2005 |
babar-pub-05-038.ps.gz |
Paper (journal paper or conference submission by BABAR Collaboration) |
ps.gz |
180.10 |
|
08-DEC-2005 |
fig1a.eps |
Figure or plot |
eps |
17.56 |
|
08-DEC-2005 |
fig1b.eps |
Figure or plot |
eps |
18.00 |
|
08-DEC-2005 |
fig1c.eps |
Figure or plot |
eps |
17.14 |
|
08-DEC-2005 |
fig1d.eps |
Figure or plot |
eps |
16.41 |
|
08-DEC-2005 |
fig2.eps |
Figure or plot |
eps |
15.49 |
|
|
Submitted To | Physical Review D - Rapid Communications |
Date Submitted | July 21, 2005 |
Journal Year | 2006 |
Journal Volume | 73 |
Journal Article/Page Range | 011101 |
|
1 revised July 1, 2005
File Date Thumbnails | File Name |
File Type |
File Format |
File Size (Kb) |
Comments |
21-JUL-2005 |
abstract.txt |
Abstract |
txt |
0.84 |
|
|
Submitted To | Physical Review Letters |
Date Submitted | July 21, 2005 |
Submitted To | 2005 International Europhysics Conference on High Energy Physics |
|
|
Categories |
|
|