Modelindependent search for CP violation in D^{0}→K^{−}K^{+}π^{−}π^{+}D0→K−K+π−π+ and D^{0}→π^{−}π^{+}π^{+}π^{−}D0→π−π+π+π− decays
Unknown, Article, Preprint
English
OPEN
Rademacker, Jonas
;
Coombes, Matthew P
(2013)
 Publisher: Elsevier Science BV

Journal:
volume
B726,
issue
3,702,693,
pages
623633
(issn: 03702693)

Related identifiers:
doi: 10.1016/j.physletb.2013.09.011

Subject:
QC  Particle Physics  Experiment  High Energy Physics  Experiment  Physics Institute  530 Physics  info:eurepo/classification/acm/TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY
A search for $CP$ violation in the phasespace structures of $D^{0}$ and $\bar{D^{0}}$ decays to the final states $K^{}K^{+}\pi^{}\pi^{+}$ and $\pi^{}\pi^{+}\pi^{+}\pi^{}$ is presented. The search is carried out with a data set corresponding to an integrated luminosity of 1.0 fb$^{−1}$ collected in 2011 by the LHCb experiment in $pp$ collisions at a centreofmass energy of 7 TeV. For the $K^{}K^{+}\pi^{}\pi^{+}$ final state, the fourbody phase space is divided into 32 bins, each bin with approximately 1800 decays. The $p$value under the hypothesis of no $CP$ violation is 9.1 %, and in no bin is a $CP$ asymmetry greater than 6.5 % observed. The phase space of the $\pi^{}\pi^{+}\pi^{+}\pi^{}$ final state is partitioned into 128 bins, each bin with approximately 2500 decays. The pvalue under the hypothesis of no $CP$ violation is 41 %, and in no bin is a $CP$ asymmetry greater than 5.5 % observed. All results are consistent with the hypothesis of no $CP$ violation at the current sensitivity.
A search for $CP$ violation in the phasespace structures of $D^{0}$ and $\bar{D^{0}}$ decays to the final states $K^{}K^{+}\pi^{}\pi^{+}$ and $\pi^{}\pi^{+}\pi^{+}\pi^{}$ is presented. The search is carried out with a data set corresponding to an integrated luminosity of 1.0 fb$^{−1}$ collected in 2011 by the LHCb experiment in $pp$ collisions at a centreofmass energy of 7 TeV. For the $K^{}K^{+}\pi^{}\pi^{+}$ final state, the fourbody phase space is divided into 32 bins, each bin with approximately 1800 decays. The $p$value under the hypothesis of no $CP$ violation is 9.1 %, and in no bin is a $CP$ asymmetry greater than 6.5 % observed. The phase space of the $\pi^{}\pi^{+}\pi^{+}\pi^{}$ final state is partitioned into 128 bins, each bin with approximately 2500 decays. The pvalue under the hypothesis of no $CP$ violation is 41 %, and in no bin is a $CP$ asymmetry greater than 5.5 % observed. All results are consistent with the hypothesis of no $CP$ violation at the current sensitivity.
A search for CP violation in the phasespace structures of D0 and D¯0 decays to the final states K−K+π−π+ and π−π+π+π− is presented. The search is carried out with a data set corresponding to an integrated luminosity of 1.0 fb−1 collected in 2011 by the LHCb experiment in pp collisions at a centreofmass energy of 7 TeV . For the K−K+π−π+ final state, the fourbody phase space is divided into 32 bins, each bin with approximately 1800 decays. The p value under the hypothesis of no CP violation is 9.1%, and in no bin is a CP asymmetry greater than 6.5% observed. The phase space of the π−π+π+π− final state is partitioned into 128 bins, each bin with approximately 2500 decays. The p value under the hypothesis of no CP violation is 41%, and in no bin is a CP asymmetry greater than 5.5% observed. All results are consistent with the hypothesis of no CP violation at the current sensitivity.