Measurement of the Decay B_(s);(0)-->D_(s);(-)pi;(+) and Evidence for B_(s);(0)-->D_(s);(-/+)K;(+/-) in e;(+)e;(-) Annihilation at sqrt[s] approximately 10.87 GeV.
We have studied B_(s);(0)-->D_(s);(-)pi;(+) and B_(s);(0)-->D_(s);(-/+)K;(+/-) decays using 23.6 fb;(-1) of data collected at the Upsilon(5S) resonance with the Belle detector at the KEKB e;(+)e;(-) collider. This highly pure B_(s);(0)-->D_(s);(-)pi;(+) sample is used to measure the branching fraction, B(B_(s);(0)-->D_(s);(-)pi;(+))=[3.67_(-0.33);(+0.35)(stat)-0.42+0.43(syst)+/-0.49(f_(s))]x10;(-3) (f_(s)=N_(B_(s);((*))B[over ]_(s);((*)))/N_(bb[over ])) and the fractions of B_(s);(0) event types at the Upsilon(5S) energy, in particular N_(B_(s);(*)B[over ]_(s);(*))/N_(B_(s);((*))B[over ]_(s);((*)))=(90.1_(-4.0);(+3.8)+/-0.2)%. We also determine the masses M(B_(s);(0))=(5364.4+/-1.3+/-0.7) MeV/c;(2) and M(B_(s);(*))=(5416.4+/-0.4+/-0.5) MeV/c;(2). In addition, we observe B_(s);(0)-->D_(s);(-/+)K;(+/-) decays with a significance of 3.5sigma and measure B(B_(s);(0)-->D_(s);(-/+)K;(+/-))=[2.4_(-1.0);(+1.2)(stat)+/-0.3(syst)+/-0.3(f_(s))]x10;(-4).
Louvot
R
R
Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne.
Wicht
J
J
Schneider
O
O
Adachi
I
I
Aihara
H
H
Arinstein
K
K
Aulchenko
V
V
Aushev
T
T
Bakich
A M
AM
Balagura
V
V
Bay
A
A
Bhardwaj
V
V
Bitenc
U
U
Bondar
A
A
Bozek
A
A
Bracko
M
M
Browder
T E
TE
Chen
A
A
Cheon
B G
BG
Chistov
R
R
Cho
I-S
IS
Choi
Y
Y
Dalseno
J
J
Danilov
M
M
Dash
M
M
Drutskoy
A
A
Dungel
W
W
Eidelman
S
S
Gabyshev
N
N
Goldenzweig
P
P
Golob
B
B
Ha
H
H
Haba
J
J
Hayasaka
K
K
Hayashii
H
H
Hazumi
M
M
Hoshi
Y
Y
Hou
W-S
WS
Hyun
H J
HJ
Iijima
T
T
Inami
K
K
Ishikawa
A
A
Ishino
H
H
Itoh
R
R
Iwasaki
M
M
Joshi
N J
NJ
Kah
D H
DH
Kang
J H
JH
Katayama
N
N
Kawai
H
H
Kawasaki
T
T
Kichimi
H
H
Kim
S K
SK
Kim
Y I
YI
Kim
Y J
YJ
Kinoshita
K
K
Korpar
S
S
Krizan
P
P
Krokovny
P
P
Kumar
R
R
Kuzmin
A
A
Kwon
Y-J
YJ
Kyeong
S-H
SH
Lange
J S
JS
Lee
J S
JS
Lee
M J
MJ
Lee
S E
SE
Lesiak
T
T
Li
J
J
Limosani
A
A
Lin
S-W
SW
Liventsev
D
D
Mandl
F
F
Matyja
A
A
McOnie
S
S
Medvedeva
T
T
Miyabayashi
K
K
Miyake
H
H
Miyata
H
H
Miyazaki
Y
Y
Mizuk
R
R
Mori
T
T
Nakano
E
E
Nakao
M
M
Nishida
S
S
Nitoh
O
O
Ogawa
S
S
Ohshima
T
T
Okuno
S
S
Ozaki
H
H
Pakhlova
G
G
Park
C W
CW
Park
H K
HK
Pestotnik
R
R
Piilonen
L E
LE
Sahoo
H
H
Sakai
Y
Y
Schümann
J
J
Schwartz
A J
AJ
Sekiya
A
A
Senyo
K
K
Sevior
M E
ME
Shapkin
M
M
Shiu
J-G
JG
Singh
J B
JB
Somov
A
A
Stanic
S
S
Staric
M
M
Sumisawa
K
K
Sumiyoshi
T
T
Tanaka
M
M
Taylor
G N
GN
Teramoto
Y
Y
Tikhomirov
I
I
Trabelsi
K
K
Uehara
S
S
Uglov
T
T
Unno
Y
Y
Uno
S
S
Usov
Y
Y
Varner
G
G
Vervink
K
K
Wang
C C
CC
Wang
C H
CH
Wang
P
P
Wang
X L
XL
Watanabe
Y
Y
Wedd
R
R
Won
E
E
Yabsley
B D
BD
Yamashita
Y
Y
Yamauchi
M
M
Zhang
Z P
ZP
Zhilich
V
V
Zhulanov
V
V
Zivko
T
T
Zupanc
A
A
Zwahlen
N
N
Zyukova
O
O