Measurement of the Direct CP-violating Charge Asymmetry in D±s→ϕπ± Decays

, D0 Collaboration (2014) Measurement of the Direct CP-violating Charge Asymmetry in D±s→ϕπ± Decays. Physical review letters, 112. ISSN 1079-7114

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Abstract

We present a measurement of the direct CP-violating charge asymmetry in D+s→ϕπ± decays where the ϕ meson decays to K+K−, using the full Run II data set with an integrated luminosity of 10.4  fb−1 of proton-antiproton collisions collected using the D0 detector at the Fermilab Tevatron Collider. The normalized difference ACP in the yield of D+s and D−s mesons in these decays is measured by fitting the difference between their reconstructed invariant mass distributions. This results in an asymmetry of ACP=[−0.38±0.27]%, which is the most precise measurement of this quantity to date. The result is consistent with the standard model prediction of zero CP asymmetry in this decay.

Item Type:
Journal Article
Journal or Publication Title:
Physical review letters
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/3100
Subjects:
ID Code:
68949
Deposited By:
Deposited On:
21 Mar 2014 14:54
Refereed?:
Yes
Published?:
Published
Last Modified:
02 Dec 2020 01:59