SEARCH ON e+ - e- PAIR AND OBSERVATION OF A NEW LIGHT NEUTRAL BOSON

被引：0
|
作者：
El-Nagdy, M. S. [1 ]
Abdelsalam, A. [2 ]
Badawy, B. M. [3 ]
机构：
[1] Helwan Univ, Fac Sci, Dept Phys, Helwan, Egypt
[2] Cairo Univ, Dept Phys, Fac Sci, Giza, Egypt
[3] Atom Energy Author, Nucl Res Ctr, Reactor Phys Dept, Nasr City, Cairo Governora, Egypt
来源：
MODERN TRENDS IN PHYSICS RESEARCH: THIRD INTERNATIONAL CONFERENCE ON MODERN TRENDS IN PHYSICS RESEARCH | 2011年
关键词：
HIGH-ENERGY COLLISIONS; INSTANTONS; EMULSION;
D O I：
暂无
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We present a unified description of e(+) e(-) dilepton production in heavy ion collisions at relativistic (3.7A GeV) and ultrarelativistic (200A GeV) energies. From the interactions of [C-12 and Ne-22] at 3.7A GeV and S-32 at 200A GeV with nuclear emulsion, 134 e(+) e(-) pairs are observed. The differential distribution of the energy asymmetry of pairs is compared to a background observation at Bristol. The events are consistent in a way that, they scale well in a single curve of exponential decay. This ensures correct asymptotics and provides a unified description of mesonic decay. The existence of light neutral boson of mass (1.55 +/- 0.14 MeV/c(2)) is questionable, because the candidate peak is seen in the invariant mass spectrum of its decay into e(+) e(-) pairs. The data seem to suggest the production and subsequent decay of short lived neutral boson with lifetime of the order of 10(-16) S.
引用
收藏
页码：266 / 272
页数：7
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