Measurement of inclusive radiative B-meson decays with a photon energy threshold of 1.7 GeV.
Using 605 fb(-1) of data collected at the Upsilon(4S) resonance we present a measurement of the inclusive radiative B-meson decay channel, B-->X(s)gamma. For the lower photon energy thresholds of 1.7, 1.8, 1.9, and 2.0 GeV, as defined in the rest frame of the B meson, we measure the partial branching fraction and the mean and variance of the photon energy spectrum. At the 1.7 GeV threshold we obtain the partial branching fraction BF(B-->X(s)}gamma)=(3.45+/-0.15+/-0.40)x10(-4), where the errors are statistical and systematic.
Limosani
A
A
University of Melbourne, School of Physics, Victoria 3010.
Aihara
H
H
Arinstein
K
K
Aushev
T
T
Bakich
A M
AM
Balagura
V
V
Barberio
E
E
Bay
A
A
Belous
K
K
Bischofberger
M
M
Bondar
A
A
Bozek
A
A
Bracko
M
M
Browder
T E
TE
Chang
P
P
Chao
Y
Y
Chen
A
A
Cheon
B G
BG
Choi
Y
Y
Dalseno
J
J
Danilov
M
M
Drutskoy
A
A
Dungel
W
W
Eidelman
S
S
Goldenzweig
P
P
Golob
B
B
Ha
H
H
Hayashii
H
H
Hoshi
Y
Y
Hou
W-S
WS
Hyun
H J
HJ
Inami
K
K
Itoh
R
R
Iwasaki
Y
Y
Julius
T
T
Kah
D H
DH
Kim
H O
HO
Kim
S K
SK
Kim
Y I
YI
Kim
Y J
YJ
Kinoshita
K
K
Ko
B R
BR
Korpar
S
S
Kreps
M
M
Krizan
P
P
Krokovny
P
P
Kuhr
T
T
Kumar
R
R
Kwon
Y-J
YJ
Kyeong
S-H
SH
Lesiak
T
T
Li
J
J
Liu
C
C
Liventsev
D
D
Louvot
R
R
Matyja
A
A
Miyabayashi
K
K
Miyata
H
H
Miyazaki
Y
Y
Mizuk
R
R
Mori
T
T
Nakao
M
M
Nakazawa
H
H
Nishida
S
S
Nishimura
K
K
Nitoh
O
O
Nozaki
T
T
Ogawa
S
S
Ohshima
T
T
Okuno
S
S
Ozaki
H
H
Pakhlova
G
G
Park
C W
CW
Park
H
H
Piilonen
L E
LE
Rozanska
M
M
Sahoo
H
H
Sakai
Y
Y
Schneider
O
O
Schümann
J
J
Schwanda
C
C
Schwartz
A J
AJ
Senyo
K
K
Sevior
M E
ME
Shapkin
M
M
Shebalin
V
V
Shen
C P
CP
Shiu
J-G
JG
Singh
J B
JB
Stanic
S
S
Staric
M
M
Sumisawa
K
K
Sumiyoshi
T
T
Suzuki
S
S
Taylor
G N
GN
Teramoto
Y
Y
Trabelsi
K
K
Tsuboyama
T
T
Uehara
S
S
Unno
Y
Y
Uno
S
S
Urquijo
P
P
Ushiroda
Y
Y
Varner
G
G
Varvell
K E
KE
Vervink
K
K
Wang
C H
CH
Wang
M-Z
MZ
Wang
P
P
Watanabe
Y
Y
Wedd
R
R
Wicht
J
J
Won
E
E
Yabsley
B D
BD
Yamamoto
H
H
Yamashita
Y
Y
Zhang
Z P
ZP
Zivko
T
T
Zupanc
A
A
D008027:Light; D008651:Mesons; D017785:Photons; D013057:Spectrum Analysis; D013816:Thermodynamics