Measurement of mixing and CP violation parameters in two-body charm decays
A bstract A study of mixing and indirect CP violation in D 0 mesons through the determination of the parameters y CP and A Γ is presented. The parameter y CP is the deviation from unity of the ratio of effective lifetimes measured in D 0 decays to the CP eigenstate K + K − with respect to decays to...
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Published in | The journal of high energy physics Vol. 2012; no. 4 |
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Main Authors | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
Berlin/Heidelberg
Springer-Verlag
01.04.2012
Springer Nature B.V Springer Verlag Springer |
Subjects | |
Online Access | Get full text |
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Summary: | A
bstract
A study of mixing and indirect CP violation in
D
0
mesons through the determination of the parameters
y
CP
and
A
Γ
is presented. The parameter
y
CP
is the deviation from unity of the ratio of effective lifetimes measured in
D
0
decays to the CP eigenstate
K
+
K
−
with respect to decays to the Cabibbo favoured mode
K
−
π
+
. The result measured using data collected by LHCb in 2010, corresponding to an integrated luminosity of 29 pb
−1
, is
y
CP
= (5
.
5 ± 6
.
3
stat
± 4
.
1
syst
) × 10
−3
. The parameter
A
Γ
is the asymmetry of effective lifetimes measured in decays of
D
0
and
mesons to
K
+
K
−
. The result is
A
Γ
= (−5
.
9 ± 5
.
9
stat
± 2
.
1
syst
) × 10
−3
. A data-driven technique is used to correct for lifetime-biasing effects. |
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ISSN: | 1029-8479 1126-6708 1029-8479 |
DOI: | 10.1007/JHEP04(2012)129 |