The
decay
B
+
→
ψ(
2S
)φ(
1020
)
K
+
is
observed
for
the
first
time
using
data
collected
from
pp
collisions
at
√
s
=
8
TeV by
the
CMS
experiment
at
the
LHC,
corresponding
to
an
integrated
luminosity
of
19.6 fb
−
1
.
The
branching
fraction
of
this
decay
is
measured,
using
the
mode
B
+
→
ψ(
2S
)
K
+
as
normalization,
to
be
(
4
.
0
±
0
.
4
(stat)
±
0
.
6
(syst)
±
0
.
2
(
B
))
×
10
−
6
,
where
the
third
uncertainty
is
from
the
measured
branching
fraction
of
the
normalization
channel.