Measurement of cosmic-ray antiprotons from 3.7 to 19 GeV

被引：66

作者：

Hof, M

Menn, W

Pfeifer, C

Simon, M

Golden, RL

Stochaj, SJ

Stephens, SA

Basini, G

Ricci, M

Brancaccio, FM

Papini, P

Piccardi, S

Spillantini, P

DePascale, MP

Morselli, A

Picozza, P

Brunetti, MT

Codino, A

Grimani, C

Menichelli, M

Mitchell, JW

Ormes, JF

Streitmatter, RE

机构：

[1] NEW MEXICO STATE UNIV,LAS CRUCES,NM 88003

[2] TATA INST FUNDAMENTAL RES,BOMBAY 400005,MAHARASHTRA,INDIA

[3] IST NAZL FIS NUCL,LAB NAZL FRASCATI,I-00044 FRASCATI,ITALY

[4] UNIV FLORENCE,DIPARTIMENTO FIS,I-50125 FLORENCE,ITALY

[5] IST NAZL FIS NUCL,SEZ FIRENZE,I-50125 FLORENCE,ITALY

[6] UNIV ROMA TOR VERGATA,DIPARTIMENTO FIS,I-00133 ROME,ITALY

[7] IST NAZL FIS NUCL,SEZ ROMA,I-00133 ROME,ITALY

[8] UNIV PERUGIA,DIPARTIMENTO FIS,I-06100 PERUGIA,ITALY

[9] IST NAZL FIS NUCL,SEZ PERUGIA,I-06100 PERUGIA,ITALY

[10] NASA,GODDARD SPACE FLIGHT CTR,GREENBELT,MD 20771

来源：

ASTROPHYSICAL JOURNAL | 1996年 / 467卷 / 01期

基金：

美国国家航空航天局;

关键词：

cosmic rays; elementary particles;

D O I：

10.1086/310185

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The antiproton-to-proton ratio, (p) over bar/p, in cosmic rays has been measured in the energy range 3.7-19 GeV. This measurement was carried out using a balloon-borne superconducting magnetic spectrometer along with a gas Cerenkov counter, an imaging calorimeter, and a time-of-flight scintillator system. The measured (p) over bar/p ratio was determined to be 1.24(-0.51)(+0.68) x 10(-4). The present result, along with other recent observations, shows that the observed abundances of antiprotons are consistent with models in which antiprotons are produced as secondaries during the propagation of cosmic rays in the Galaxy.

引用

页码：L33 / L36

页数：4

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