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

页码：185 / 190

页数：6

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