ELECTROPRODUCTION OF PI-0 ON THE PROTON NEAR THRESHOLD

被引：32

作者：

WELCH, TP

KAREN, PH

MITCHELL, JH

NORUM, BE

BLOK, HP

VANDENBRINK, HB

DEJAGER, CW

JANS, E

LAPIKAS, L

DEVRIES, H

WESSELING, J

BERGSTROM, J

DEADY, M

机构：

[1] UNIV VIRGINIA,DEPT PHYS,CHARLOTTESVILLE,VA 22903

[2] FREE UNIV AMSTERDAM,FAC NAT KUNDE & STERRENKUNDE,1081 HV AMSTERDAM,NETHERLANDS

[3] NATL INST NUCL PHYS & HIGH ENERGY PHYS,1009 DB AMSTERDAM,NETHERLANDS

[4] UNIV SASKATCHEWAN,SASKATCHEWAN ACCELERATOR LAB,SASKATOON S7N 0W0,SASKATCHEWAN,CANADA

[5] BARD COLL,DEPT PHYS,ANNANDALE ON HUDSON,NY 12504

来源：

PHYSICAL REVIEW LETTERS | 1992年 / 69卷 / 19期

关键词：

D O I：

10.1103/PhysRevLett.69.2761

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The electroproduction of pi0 on the proton was measured from 0 to 2.5 MeV above threshold for virtual-photon 4-momenta of -0.05 and -0.1 (GeV/c)2. The sum of the lowest-order contributing multipoles, a0 = \E0+\2 - epsilon(L)\L0+\2, was determined with a precision an order of magnitude better than previously possible. Our results for a0 are consistent with present calculations. Our extracted value for \L0+\2 at the "photon point" is in agreement with recent predictions.

引用

页码：2761 / 2764

页数：4

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