Measurement of the CP-even fraction of D0 ? ?+ ?- ?+ ?-
Küçük Resim Yok
Tarih
2022
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Amer Physical Soc
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
A measurement of the CP-even fraction of the decay D-0 -> pi(+) pi(-) pi(+) pi(-) is performed with a quantum-correlated psi(3770) -> D (D) over bar data sample collected by the BESIII experiment, corresponding to an integrated luminosity of 2.93 fb(-1). Using a combination of CP eigenstates, D-0 -> pi(+) pi(-) pi(+) pi(-) and D -> K-S,L(0) pi(+) pi(-) as tagging modes, the CP-even fraction is measured to be F-+(4 pi) = 0.735 +/- 0.015 +/- 0.005, where the first uncertainty is statistical and the second is systematic. This is the most precise determination of this quantity to date. It provides valuable model-independent input for the measurement of the angle gamma of the Cabibbo-Kobayashi-Maskawa matrix with B +/- -> DK +/- decays, and for time-dependent studies of CP violation and mixing in the D-0-(D) over bar (0) system.
Açıklama
Anahtar Kelimeler
Difference, Phase
Kaynak
Physical Review D
WoS Q Değeri
Q1
Scopus Q Değeri
Q1
Cilt
106
Sayı
9
