A
search
for
massive
resonances
decaying
to
a
Z
boson
and
a
photon
is
performed
in
events
with
a
hadronically
decaying
Z
boson
candidate,
separately
in
light-quark
and
b
quark
decay
modes,
identified
using
jet
substructure
and
advanced
b
tagging
techniques.
Results
are
based
on
samples
of
proton–
proton
collisions
collected
with
the
CMS
detector
at
the
LHC
at
center-of-mass
energies
of
8
and
13
TeV,
corresponding
to
integrated
luminosities
of
19.7
and
2.7
fb
−
1
,
respectively.
The
results
of
the
search
are
combined
with
those
of
a
similar
search
in
the
leptonic
decay
modes
of
the
Z
boson,
based
on
the
same
data
sets.
Spin-0
resonances
with
various
widths
and
with
masses
in
a
range
between
0
.
2and
3
.
0
TeV
are
considered.
No
significant
excess
is
observed
either
in
the
individual
analyses
or
the
combination.
The
results
are
presented
in
terms
of
upper
limits
on
the
production
cross
section
of
such
resonances
and
constitute
the
most
stringent
limits
to
date
for
a
wide
range
of
masses.