Observation of the B-s(0) -> X(3872)phi decay
File(s)
Published version
Author(s)
Type
Journal Article
Abstract
Using a data sample of proton-proton collisions at
√
s
=
13
TeV
, corresponding to an integrated luminosity of
140
fb
−
1
collected by the CMS experiment in 2016–2018, the
B
0
s
→
X
(
3872
)
ϕ
decay is observed. Decays into
J
/
ψ
π
+
π
−
and
K
+
K
−
are used to reconstruct, respectively, the
X
(
3872
)
and
ϕ
. The ratio of the product of branching fractions
B
[
B
0
s
→
X
(
3872
)
ϕ
]
B
[
X
(
3872
)
→
J
/
ψ
π
+
π
−
]
to the product
B
[
B
0
s
→
ψ
(
2
S
)
ϕ
]
B
[
ψ
(
2
S
)
→
J
/
ψ
π
+
π
−
]
is measured to be
[
2.21
±
0.29
(
stat
)
±
0.17
(
syst
)
]
%
. The ratio
B
[
B
0
s
→
X
(
3872
)
ϕ
]
/
B
[
B
0
→
X
(
3872
)
K
0
]
is found to be consistent with one, while the ratio
B
[
B
0
s
→
X
(
3872
)
ϕ
]
/
B
[
B
+
→
X
(
3872
)
K
+
]
is two times smaller. This suggests a difference in the production dynamics of the
X
(
3872
)
in
B
0
and
B
0
s
meson decays compared to
B
+
. The reported observation may shed new light on the nature of the
X
(
3872
)
particle.
√
s
=
13
TeV
, corresponding to an integrated luminosity of
140
fb
−
1
collected by the CMS experiment in 2016–2018, the
B
0
s
→
X
(
3872
)
ϕ
decay is observed. Decays into
J
/
ψ
π
+
π
−
and
K
+
K
−
are used to reconstruct, respectively, the
X
(
3872
)
and
ϕ
. The ratio of the product of branching fractions
B
[
B
0
s
→
X
(
3872
)
ϕ
]
B
[
X
(
3872
)
→
J
/
ψ
π
+
π
−
]
to the product
B
[
B
0
s
→
ψ
(
2
S
)
ϕ
]
B
[
ψ
(
2
S
)
→
J
/
ψ
π
+
π
−
]
is measured to be
[
2.21
±
0.29
(
stat
)
±
0.17
(
syst
)
]
%
. The ratio
B
[
B
0
s
→
X
(
3872
)
ϕ
]
/
B
[
B
0
→
X
(
3872
)
K
0
]
is found to be consistent with one, while the ratio
B
[
B
0
s
→
X
(
3872
)
ϕ
]
/
B
[
B
+
→
X
(
3872
)
K
+
]
is two times smaller. This suggests a difference in the production dynamics of the
X
(
3872
)
in
B
0
and
B
0
s
meson decays compared to
B
+
. The reported observation may shed new light on the nature of the
X
(
3872
)
particle.
Date Issued
2020-10-07
Date Acceptance
2020-10-01
Citation
Physical Review Letters, 2020, 125 (15), pp.152001 – 1-152001 – 18
ISSN
0031-9007
Publisher
American Physical Society
Start Page
152001 – 1
End Page
152001 – 18
Journal / Book Title
Physical Review Letters
Volume
125
Issue
15
Copyright Statement
© 2020 CERN, for the CMS Collaboration. 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. Funded by SCOAP3.
License URL
Identifier
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000575690400002&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
Subjects
Science & Technology
Physical Sciences
Physics, Multidisciplinary
Physics
QED RADIATIVE-CORRECTIONS
UNIVERSAL MONTE-CARLO
PHOTOS
Publication Status
Published
Article Number
ARTN 152001
Date Publish Online
2020-10-07