First Observation of the Rare Purely Baryonic Decay &ITB&IT0 -> &ITp&IT$(&ITp&IT)over-bar-$
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Published version
Author(s)
Type
Journal Article
Abstract
The first observation of the decay of a
B
0
meson to a purely baryonic final state,
B
0
→
p
¯
p
, is reported. The proton-proton collision data sample used was collected with the LHCb experiment at center-of-mass energies of 7 and 8 TeV and corresponds to an integrated luminosity of
3.0
fb
−
1
. The branching fraction is determined to be
B
(
B
0
→
p
¯
p
)
=
(
1.25
±
0.27
±
0.18
)
×
10
−
8
, where the first uncertainty is statistical and the second systematic. The decay mode
B
0
→
p
¯
p
is the rarest decay of the
B
0
meson observed to date. The decay
B
0
s
→
p
¯
p
is also investigated. No signal is seen and the upper limit
B
(
B
0
s
→
p
¯
p
)
<
1.5
×
10
−
8
at 90% confidence level is set on the branching fraction.
B
0
meson to a purely baryonic final state,
B
0
→
p
¯
p
, is reported. The proton-proton collision data sample used was collected with the LHCb experiment at center-of-mass energies of 7 and 8 TeV and corresponds to an integrated luminosity of
3.0
fb
−
1
. The branching fraction is determined to be
B
(
B
0
→
p
¯
p
)
=
(
1.25
±
0.27
±
0.18
)
×
10
−
8
, where the first uncertainty is statistical and the second systematic. The decay mode
B
0
→
p
¯
p
is the rarest decay of the
B
0
meson observed to date. The decay
B
0
s
→
p
¯
p
is also investigated. No signal is seen and the upper limit
B
(
B
0
s
→
p
¯
p
)
<
1.5
×
10
−
8
at 90% confidence level is set on the branching fraction.
Date Issued
2017-12-04
Date Acceptance
2017-10-17
Citation
Physical Review Letters, 2017, 119 (23)
ISSN
0031-9007
Publisher
American Physical Society
Journal / Book Title
Physical Review Letters
Volume
119
Issue
23
Copyright Statement
Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.
License URL
Subjects
Science & Technology
Physical Sciences
Physics, Multidisciplinary
Physics
B DECAYS
TOOL
Publication Status
Published
Article Number
232001