Measurement of the helicity asymmetry of the γp cross section between 2.5 and 5.3 GeV

被引：0
|
作者：
Sober, DI [1 ]
Todor, L [1 ]
Bosted, PE [1 ]
Kuhn, SE [1 ]
机构：
[1] Catholic Univ Amer, Washington, DC 20064 USA
来源：
GDH 2002: PROCEEDINGS OF THE SECOND INTERNATIONAL SYMPOSIUM ON THE GERASIMOV-DRELL-HEARN SUM RULE AND THE SPIN STRUCTURE OF THE NUCLEON | 2003年
关键词：
D O I：
10.1142/9789812705167_0034
中图分类号：
O57 [原子核物理学、高能物理学];
学科分类号：
070202 ;
摘要：
We report a measurement of the helicity asymmetry of a substantial fraction of the gammap total cross section at photon energies between 2.5 and 5.3 GeV in Hall B of Jefferson Lab. The preliminary analysis uses only events with at least one charged particle between approximately 8degrees and 45degrees. Assuming that the measured asymmetry applies also to the undetected portion of the cross section, we compare our preliminary result with the results of the Regge parameterization of Bianchi and Thomas.
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页码：253 / 257
页数：5
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