Measurements of Charmed Meson Lifetimes and Search for $D^0$-$\overline{D}^0$ Mixing with the Belle Experiment

Jun-ichi Tanaka

doi:10.1142/9789812811219_0021

paper

Measurements of Charmed Meson Lifetimes and Search for $D^{0}$ - $D^{0}$ Mixing with the Belle Experiment

arXiv:hep-ex/0104053 · doi:10.1142/9789812811219_0021

Abstract

The lifetimes of charmed mesons have been measured using 11.1fb $^{- 1} o f d a t a co l l ec t e d w i t h t h e B e l l e d e t ec t or a t K E K B . E a c h c an d i d a t e i s f u l l y r eco n s t r u c t e d t o i d e n t i f y t h e f l a v or o f t h ec ha r m e d m eso n . T h e l i f e t im es a r e m e a s u r e d t o b e$ τ(D^0)=(414.5\pm1.7) $f s,$ τ(D^+)=(1029\pm12) $f s an d$ τ(D_s^+)=(488.4^{+7.8}_{-7.7}) $f s, w h er e t h eer r or i ss t a t i s t i c a l o n l y . T h e mi x in g p a r am e t er$ y_{CP} $i s a l so m e a s u r e d t o b e$ y_{CP}=(1.16^{+1.67}_{-1.65}(stat.))% $t h r o ug h t h e l i f e t im e d i f f er e n ceo f$ D^0$ mesons decaying into CP-mixed states and CP eigenstates.

arXiv comment4 pages, 10 figures, BCP4, Ise-Shima, Japan, 19-23 February 2001

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Measurements of Charmed Meson Lifetimes and Search for D0-D0 Mixing with the Belle Experiment

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Measurements of Charmed Meson Lifetimes and Search for $D^{0}$ - $D^{0}$ Mixing with the Belle Experiment