Measurement of phi(3) with Dalitz plot analysis of B+- ---> D**(*) K+- decay
Journal
Physical Review
Journal Volume
D70
Pages
072003
Date Issued
2004-06
Author(s)
Poluektov, A.
Mitaroff, W.
Khan, H. R.
Dong, L. Y.
YUAN-HUNG CHAO
Hou, W.
Matsumoto, T.
Browder, T. E.
Bondar, A.
Iwasaki, M.
Olsen, S. L.
Lin, S.
Kim, H. J.
Cheon, B. G.
Chistov, R.
Nagamine, T.
Katayama, N.
Gokhroo, G.
Abstract
We present a measurement of the unitarity triangle angle φ3 using a Dalitz plot analysis of the three-body decay of the neutral D meson from the B± → D(*)K± process. The method employs the interference between D0 and D̄0 to extract both the weak and strong phases. We apply this method to a 140 fb-1 data sample collected by the Belle experiment. The analysis uses the modes B± → DK± and B± → D*K±, D* → Dπ0, where the neutral D meson decays into KSπ + π-. We obtain 146 signal candidates for B ± → DK± and 39 candidates for B ± → D*K±. From a combined maximum likelihood fit to the B± → DK± and B± → D*K± modes, we obtain φ3 = 77° -19°+17° (stat) ± 13°(syst) ± 11°(model). The corresponding 2 standard deviation interval is 26° < φ3 < 126°.
Type
journal article