Search for CP violation in the phase space of D-0 -> pi(+)pi(-)pi(+)pi(-) decays
File(s)
Published version
Author(s)
Type
Journal Article
Abstract
A
search
for
time-integrated
CP
violation
in
the
Cabibbo-suppressed
decay
D
0
→
π
+
π
−
π
+
π
−
is
performed
using
an
unbinned,
model-independent
technique
known
as
the
energy
test.
This
is
the
first
application
of
the
energy
test
in
four-body
decays.
The
search
is
performed
for
P
-even
CP
asymmetries
and,
for
the
first
time,
is
extended
to
probe
the
P
-odd
case.
Using
proton–proton
collision
data
corresponding
to
an
integrated
luminosity
of
3.0 fb
−
1
collected
by
the
LHCb
detector
at
centre-of-
mass
energies
of
√
s
=
7TeVand
8 TeV,
the
world’s
best
sensitivity
to
CP
violation
in
this
decay
is
obtained.
The
data
are
found
to
be
consistent
with
the
hypothesis
of
CP
symmetry
with
a
p
-value
of
(
4
.
6
±
0
.
5
)
%in
the
P
-even
case,
and
marginally
consistent
with
a
p
-value
of
(
0
.
6
±
0
.
2
)
%in
the
P
-odd
case,
corresponding
to
a
significance
for
CP
non-conservation
of
2.7
standard
deviations.
search
for
time-integrated
CP
violation
in
the
Cabibbo-suppressed
decay
D
0
→
π
+
π
−
π
+
π
−
is
performed
using
an
unbinned,
model-independent
technique
known
as
the
energy
test.
This
is
the
first
application
of
the
energy
test
in
four-body
decays.
The
search
is
performed
for
P
-even
CP
asymmetries
and,
for
the
first
time,
is
extended
to
probe
the
P
-odd
case.
Using
proton–proton
collision
data
corresponding
to
an
integrated
luminosity
of
3.0 fb
−
1
collected
by
the
LHCb
detector
at
centre-of-
mass
energies
of
√
s
=
7TeVand
8 TeV,
the
world’s
best
sensitivity
to
CP
violation
in
this
decay
is
obtained.
The
data
are
found
to
be
consistent
with
the
hypothesis
of
CP
symmetry
with
a
p
-value
of
(
4
.
6
±
0
.
5
)
%in
the
P
-even
case,
and
marginally
consistent
with
a
p
-value
of
(
0
.
6
±
0
.
2
)
%in
the
P
-odd
case,
corresponding
to
a
significance
for
CP
non-conservation
of
2.7
standard
deviations.
Date Issued
2017-04-04
Date Acceptance
2017-03-27
Citation
Physics Letters B, 2017, 769, pp.345-356
ISSN
0370-2693
Publisher
Elsevier
Start Page
345
End Page
356
Journal / Book Title
Physics Letters B
Volume
769
Copyright Statement
© 2017 The Author(s Published by Elsevier
B.V. This is an open access article under
the CC-BY license (http://creativecommons.org/licenses/by/4.0/).
Funded by SCOAP3
.
B.V. This is an open access article under
the CC-BY license (http://creativecommons.org/licenses/by/4.0/).
Funded by SCOAP3
.
Identifier
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Subjects
Science & Technology
Physical Sciences
Astronomy & Astrophysics
Physics, Nuclear
Physics, Particles & Fields
Physics
TEV PP COLLISIONS
PRODUCTION ASYMMETRY
Publication Status
Published