STUDY OF CHI-C2 PRODUCTION IN PHOTON PHOTON COLLISIONS - TPC/2-GAMMA COLLABORATION

被引：16

作者：

BAUER, DA

BELCINSKI, R

BERG, RC

BINGHAM, HH

BUCHANAN, CD

CALDWELL, DO

CHUN, SB

CLARK, AR

DAHL, OI

DAOUDI, M

EASTMAN, JJ

EISNER, AM

FAIRFIELD, KH

GODFREY, G

GREENBAUM, GS

HAUPTMAN, JM

HOFMANN, W

HOLTZAPPLE, RL

KHACHERYAN, S

KNOPFLE, KT

KOFLER, RR

LAMBERT, DJ

LAYTER, JG

LIN, WT

LOKEN, SC

LU, A

LYNCH, GR

LYS, JE

MADARAS, RJ

MARSISKE, H

MASEK, GE

MILLER, ES

NICOL, NA

NYGREN, DR

OYANG, YT

PAAR, HP

PALOUNEK, APT

PELLETT, DE

RONAN, MT

ROSS, RR

SHAPIRO, G

SHEN, BC

STEPHENS, RW

STEVENSON, ML

STRAUSS, MG

SULLIVAN, MK

VERNON, W

WANG, EM

WANG, YX

WENZEL, WA

机构：

[1] UNIV MASSACHUSETTS,AMHERST,MA 01003

[2] LAWRENCE BERKELEY LAB,BERKELEY,CA 94720

[3] UNIV CALIF LOS ANGELES,LOS ANGELES,CA 90024

[4] UNIV CALIF RIVERSIDE,RIVERSIDE,CA 92521

[5] UNIV CALIF STANFORD,INTERCAMPUS INST RES PARTICLE ACCELERATORS,STANFORD,CA 94305

[6] IOWA STATE UNIV SCI & TECHNOL,AMES,IA 50011

[7] STANFORD UNIV,STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94305

[8] UNIV CALIF DAVIS,DAVIS,CA 95616

[9] UNIV CALIF SAN DIEGO,LA JOLLA,CA 92093

[10] MAX PLANCK INST NUCL PHYS,W-6900 HEIDELBERG 1,GERMANY

来源：

PHYSICS LETTERS B | 1993年 / 302卷 / 2-3期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/0370-2693(93)90407-9

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Two-photon production of the charmonium state chi(c) has been studied by the TPC/Two-Gamma experiment at the SLAC e+e-collider PEP. We observe evidence of the chi(c2) state in the channel gammagamma --> chi(c2), chi(c2) --> gammaJ/psi, J/psi --> l+l- and obtain a value of GAMMA(gammagamma)(chi(c2)) = 3.4 +/- 1.7 +/- 0.9 keV. This is the first observation of the two-photon production of a chi(c) state. Comparison is made with previous experimental results and QCD predictions for GAMMA(gammagamma)(chi(c2)).

引用

页码：345 / 350

页数：6

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