A signal of a narrow pi NN resonance in pp->pp pi(-)pi(+)

被引：54

作者：

Brodowski, W

Bilger, R

Calen, H

Clement, H

Ekstrom, C

Fohl, K

Fransson, K

Gustafsson, L

Haggstrom, S

Hoistad, B

Johansson, A

Johansson, T

Kilian, K

Kullander, S

Kupsc, A

Kurz, G

Marciniewski, P

Morosov, B

Moehn, J

Mortsell, A

Oelert, W

Renken, V

Ruber, R

Schepkin, MG

Siodlaczek, U

Stepaniak, J

Sukhanov, A

Turowiecki, A

Wagner, GJ

Wilhelmi, Z

Zabierowski, J

Zernov, A

Zlomanczuk, J

机构：

[1] FORSCHUNGSZENTRUM JULICH, INST KERNPHYS, W-5170 JULICH, GERMANY

[2] INST NUCL STUDIES, PL-00681 WARSAW, POLAND

[3] JOINT INST NUCL RES, DUBNA, RUSSIA

[4] INST THEORET & EXPTL PHYS, MOSCOW 117259, RUSSIA

[5] INST NUCL STUDIES, LODZ, POLAND

[6] INST EXPTL PHYS, WARSAW, POLAND

[7] UPPSALA UNIV, DEPT RADIAT SCI, UPPSALA, SWEDEN

[8] SVEDBERG LAB, S-75121 UPPSALA, SWEDEN

来源：

ZEITSCHRIFT FUR PHYSIK A-HADRONS AND NUCLEI | 1996年 / 355卷 / 01期

关键词：

D O I：

10.1007/s002180050070

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 on the first exclusive measurement of the 2 pi production in NN collisions at T-p = 750 MeV using a H-2 cluster jet target and the WASA/PROMICE detector at CELSIUS. In the invariant-mass spectrum M(pp pi-) we observe a narrow peak at 2.063(2) GeV with a 4 sigma deviation relative to the MC simulations for the conventional nonresonant 2 pi production process. The finding is in agreement with the hypothesis of a narrow pi NN resonance with I(J(P)) = even (0(-)), called d', postulated recently to describe the peculiar resonance-like behavior of the pionic double charge exchange on nuclei.

引用

页码：5 / 8

页数：4

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