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Chinese Academy of Sciences Institutional Repositories Grid
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CAS IR Grid
机构
高能物理研究所 [2]
采集方式
OAI收割 [2]
内容类型
学位论文 [1]
期刊论文 [1]
发表日期
2007 [1]
1991 [1]
学科主题
Physics [1]
高能实验物理 [1]
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High statistics measurement of the cross sections of gamma gamma ->pi(+) pi(-) production
期刊论文
OAI收割
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 2007, 卷号: 76, 期号: 7, 页码: 74102
作者:
Mori, T
;
Uehara, S
;
Watanabe, Y
;
Abe, K
;
Adach, I
收藏
  |  
浏览/下载:43/0
  |  
提交时间:2016/06/29
two-photon production
f(0)(980)
f(2)(1270)
n '(958)
gamma gamma -> pi(+)pi(-) cross section
硕士论文-J/ψ衰变到2(pai+pai-)°p和2(K+K-)终态的强衰变研究
学位论文
OAI收割
硕士, 北京: 中国科学院研究生院, 1991
作者:
陈少敏
收藏
  |  
浏览/下载:30/0
  |  
提交时间:2015/10/12
The
J/Ψ
hadronic
decays
involving
2(π+π-)π°and
2(K+K-)
final
states
are
investigated
by
using
the
sample
of
2.5
*
10~6
J/Ψ's
which
were
obtained
from
the
BES
detector
at
BEPC
in
the
first
half
of
1990.
Some
signals
such
as
ω(782)
φ(1020)
f2(1270)
f2'(1525)
θ/f2(1720)
b1(1235)
and
a2(1320)
have
been
found
and
measured
the
mass
width
and
branching
fraction
of
reasonance
states.
The
results
are
agreement
with
the
world
average
values.
The
ratio
of
Br(J/Ψ
→
ω
f2(1270))/Br(J/Ψ→ρ°a2°)
shows
that
doubly
OZI
violating
effects
play
a
role
in
the
J/Ψ
→
ω
f2(1270)
f2(1270)
→
π+π-
are
given
in
the
first
time:
x
=
0.99
±
0.29
Y
=
-0.24
±
0.17
Z1
=
0.90
±
0.57
Z2
=
0.56
±
0.22.