Determination of /Vub/ from measurements of the inclusive charmless semileptonic partial rates of B mesons using full reconstruction tags.
We present a measurement of the Cabibbo-Kobayashi-Maskawa matrix element /Vub/, based on 253 fb(-1) of data collected by the Belle detector at the KEKB e+ e- asymmetric collider. Events are tagged by fully reconstructing one of the B mesons, produced in pairs from Gamma(4S). The signal for b --> u semileptonic decay is distinguished from the b --> c background using the hadronic mass Mx, the leptonic invariant mass squared q2 and the variable P+ [triple bond] Ex - /px/. The results are obtained for events with p(l)* > or = 1 GeV/c, in three kinematic regions (1) Mx < 1.7 GeV/c2, (2) Mx < 1.7 GeV/c2 combined with q2 > 8 GeV2/c2, and by (3) P+ < 0.66 GeV/c. The matrix element /Vub/ is found to be (4.09 +/- 0.19 +/- 0.20(+0.14) -0.15 +/- 0.18) x 10(-3), where the errors are statistical, systematic including Monte Carlo modeling, theoretical, and from shape function parameter determination, respectively.
Bizjak
I
I
J. Stefan Institute, Ljubljana.
Abe
K
K
Abe
K
K
Aihara
H
H
Asano
Y
Y
Bahinipati
S
S
Bakich
A M
AM
Ban
Y
Y
Barberio
E
E
Barbero
M
M
Bay
A
A
Bitenc
U
U
Blyth
S
S
Bondar
A
A
Bozek
A
A
Bracko
M
M
Brodzicka
J
J
Browder
T E
TE
Chao
Y
Y
Chen
A
A
Chen
W T
WT
Cheon
B G
BG
Chistov
R
R
Choi
S-K
SK
Choi
Y
Y
Choi
Y K
YK
Chuvikov
A
A
Cole
S
S
Dalseno
J
J
Danilov
M
M
Dash
M
M
Dong
L Y
LY
Drutskoy
A
A
Eidelman
S
S
Enari
Y
Y
Fang
F
F
Fratina
S
S
Gabyshev
N
N
Garmash
A
A
Gershon
T
T
Gokhroo
G
G
Golob
B
B
Gorisek
A
A
Haba
J
J
Hara
T
T
Hayashii
H
H
Hazumi
M
M
Hinz
L
L
Hokuue
T
T
Hoshi
Y
Y
Hou
S
S
Hou
W-S
WS
Iijima
T
T
Imoto
A
A
Inami
K
K
Ishikawa
A
A
Itoh
R
R
Iwasaki
M
M
Iwasaki
Y
Y
Kang
J H
JH
Kang
J S
JS
Kapusta
P
P
Katayama
N
N
Kawai
H
H
Kawasaki
T
T
Khan
H R
HR
Kichimi
H
H
Kim
H J
HJ
Kim
S M
SM
Kinoshita
K
K
Korpar
S
S
Krizan
P
P
Krokovny
P
P
Kulasiri
R
R
Kumar
S
S
Kuo
C C
CC
Kuzmin
A
A
Kwon
Y-J
YJ
Leder
G
G
Lee
S E
SE
Lesiak
T
T
Li
J
J
Limosani
A
A
Lin
S-W
SW
Liventsev
D
D
MacNaughton
J
J
Majumder
G
G
Mandl
F
F
Matsumoto
T
T
Matyja
A
A
Mikami
Y
Y
Mitaroff
W
W
Miyabayashi
K
K
Miyake
H
H
Miyata
H
H
Mizuk
R
R
Nagamine
T
T
Nagasaka
Y
Y
Nakamura
I
I
Nakano
E
E
Nakao
M
M
Natkaniec
Z
Z
Nishida
S
S
Nitoh
O
O
Nozaki
T
T
Ogawa
S
S
Ohshima
T
T
Okabe
T
T
Okuno
S
S
Olsen
S L
SL
Onuki
Y
Y
Ostrowicz
W
W
Pakhlov
P
P
Park
H
H
Parslow
N
N
Peak
L S
LS
Pestotnik
R
R
Piilonen
L E
LE
Rozanska
M
M
Sagawa
H
H
Sakai
Y
Y
Sato
N
N
Schietinger
T
T
Schneider
O
O
Schönmeier
P
P
Schwanda
C
C
Senyo
K
K
Sevior
M E
ME
Shibuya
H
H
Shwartz
B
B
Sidorov
V
V
Somov
A
A
Soni
N
N
Stamen
R
R
Stanic
S
S
Staric
M
M
Sumiyoshi
T
T
Suzuki
S
S
Suzuki
S Y
SY
Tajima
O
O
Takasaki
F
F
Tamai
K
K
Tamura
N
N
Tanaka
M
M
Teramoto
Y
Y
Tian
X C
XC
Tsuboyama
T
T
Tsukamoto
T
T
Uehara
S
S
Uglov
T
T
Ueno
K
K
Uno
S
S
Urquijo
P
P
Varner
G
G
Varvell
K E
KE
Villa
S
S
Wang
C C
CC
Wang
C H
CH
Watanabe
Y
Y
Xie
Q L
QL
Yabsley
B D
BD
Yamaguchi
A
A
Yamashita
Y
Y
Yamauchi
M
M
Yang
Heyoung
H
Zhang
L M
LM
Zhang
Z P
ZP
Zhilich
V
V
Zontar
D
D