(p)over-bar-p annihilation cross section at very low energy

被引：63

作者：

Bertin, A

Bruschi, M

Capponi, M

Cereda, B

DeCastro, S

Ferretti, A

Galli, D

Giacobbe, B

Marconi, U

Piccinini, M

Cesari, NS

Spighi, R

Vecchi, S

Vezzani, A

Villa, M

Vitale, A

Zoccoli, A

Belli, G

Corradini, M

Donzella, A

Rizzini, EL

Venturelli, L

Zenoni, A

Cicalo, C

Masoni, A

Puddu, G

Serci, S

Temnikov, P

Usai, G

Costa, S

Ableev, VG

Denisov, OY

Gorchakov, OE

Prakhov, SN

Rozhdestvensky, AM

Sapozhnikov, MG

Tretyak, VI

Gianotti, P

Guaraldo, C

Lanaro, A

Lucherini, V

Nichitiu, F

Petrascu, C

Rosca, A

Cavion, C

Gastaldi, U

Lombardi, M

Vannucci, L

Vedovato, G

Andrighetto, A

机构：

[1] IST NAZL FIS NUCL, I-40126 BOLOGNA, ITALY

[2] UNIV BRESCIA, DIP CHIM & FIS MAT, TURIN, ITALY

[3] IST NAZL FIS NUCL, I-10125 TURIN, ITALY

[4] UNIV BRESCIA, DIP CHIM & FIS MAT, PAVIA, ITALY

[5] IST NAZL FIS NUCL, I-27100 PAVIA, ITALY

[6] UNIV CAGLIARI, DIPARTIMENTO SCI FIS, I-09100 CAGLIARI, ITALY

[7] IST NAZL FIS NUCL, CAGLIARI, ITALY

[8] CERN, PPE, CH-1211 GENEVA, SWITZERLAND

[9] JOINT INST NUCL RES, DUBNA, RUSSIA

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

[11] IST NAZL FIS NUCL, LAB NAZL LEGNARO, I-35020 LEGNARO, ITALY

[12] UNIV PADUA, DIPARTIMENTO FIS, PADUA, ITALY

[13] IST NAZL FIS NUCL, PADUA, ITALY

[14] UNIV PAVIA, DIPARTIMENTO FIS NUCL & TEOR, I-27100 PAVIA, ITALY

[15] UNIV PAVIA, DIP FIS NUCL & TEOR, TURIN, ITALY

[16] UNIV TURIN, DIP FIS NUCL & TEOR, TURIN, ITALY

[17] POLITECN TORINO, DIPARTIMENTO FIS, TURIN, ITALY

[18] UNIV TRIESTE, IST FIS, TRIESTE, ITALY

[19] UNIV UDINE, IST FIS, TRIESTE, ITALY

[20] IST NAZL FIS NUCL, TRIESTE, ITALY

来源：

PHYSICS LETTERS B | 1996年 / 369卷 / 01期

关键词：

D O I：

10.1016/0370-2693(95)01599-X

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The <(p)over bar p> total annihilation cross section has been measured, with the Obelix apparatus at LEAR, at ten values of the antiproton incident momentum between 43 and 175 MeV/c. The values of the cross section show that the well known 1/p behaviour of the annihilation cross section is drastically modified at very low momenta, which demonstrates the important role of the Coulomb force in low energy <(p)over bar p> interaction. Moreover, they do not present any explicit resonant behaviour. Finally, when compared to potential model calculations, the data suggest that the percentage of P-wave in <(p)over bar p> interaction around 50 MeV/c antiproton incident momentum is less than 5%.

引用

页码：77 / 85

页数：9

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