A STUDY OF PION PAIR PRODUCTION IN THE 2-PHOTON PROCESS

被引：10
|
作者：
ADACHI, I
DOSER, M
ENOMOTO, R
FUJII, H
FUJII, K
FUJII, T
FUJIMOTO, J
FUJIWARA, K
FUJIWARA, N
HAYASHII, H
HIGASHI, S
HOWELL, B
IIDA, N
IMANISHI, A
IKEDA, H
ISHII, T
ITOH, R
IWASAKI, H
IWASHIRO, K
KAJIKAWA, R
KAMAE, T
KATO, S
KATO, Y
KAWABATA, S
KAYAHARA, Y
KICHIMI, H
KISHIDA, T
KOBAYASHI, M
KOLTICK, D
KUSUKI, N
LEVINE, I
MARUYAMA, A
MARUYAMA, K
MATSUSHITA, K
MIYAMOTO, A
MURAMATSU, K
NAGAI, K
NAGIRA, T
NITOH, O
NOGUCHI, S
OCHIAI, F
OKUNO, H
OKUSAWA, T
ONODERA, S
SASAYAMA, N
SHIMONAKA, A
SHIMOZAWA, K
SHIRAHASHI, A
SUGAHARA, R
SUGIYAMA, A
机构：
[1] NATL LAB HIGH ENERGY PHYS,OHO,IBARAKI 305,JAPAN
[2] KOBE UNIV,DEPT PHYS,KOBE 657,JAPAN
[3] NARA WOMENS UNIV,DEPT PHYS,NARA 630,JAPAN
[4] OSAKA CITY UNIV,DEPT PHYS,SUMIYOSHI KU,OSAKA 558,JAPAN
[5] UNIV TOKYO,INST NUCL STUDY,TANASHI,TOKYO 118,JAPAN
[6] TOKYO UNIV AGR & TECHNOL,DEPT APPL PHYS,SITAGAYA KU,TOKYO,JAPAN
[7] TEZUKAYAMA GAKUIN UNIV,FAC LIBERAL ARTS,TEZUKAYAMA,JAPAN
[8] PURDUE UNIV,DEPT PHYS,W LAFAYETTE,IN 47907
[9] UNIV TOKYO,DEPT PHYS,BUNKYO KU,TOKYO 113,JAPAN
[10] TOKYO INST TECHNOL,DEPT PHYS,MEGURO KU,TOKYO 152,JAPAN
来源：
PHYSICS LETTERS B | 1990年 / 234卷 / 1-2期
关键词：
D O I：
10.1016/0370-2693(90)92026-F
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We studied the e+e-→e+e-π+π- interaction with the untagged two-photon sample obtained by the TOPAZ detector at the TRISTAN e+e- collider. The sample was taken in the energy region s=55.0-60.8 GeV. One of the QED backgrounds, e+e-→e+e-, was clearly removed by the measurement of dE/dx by the TOPAZ-TPC. The π+π- invariant mass spectrum is well reproduced by the f2(1270) resonance, the Born term and their interference. We determined the radiative width of the f2(1270) to be 2.27±0.47(stat.)±0.11(syst.) keV. © 1990.
引用
收藏
页码：185 / 190
页数：6
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