Isospin effects in the exclusive dp → 3He π+π- reaction

被引：0

作者：

Mielke, M. ^{[1
]}

Burmeister, I. ^{[1
]}

Chiladze, D. ^{[2
,3
,4
]}

Dymov, S. ^{[2
,3
,5
]}

Fritzsch, C. ^{[1
]}

Gebel, R. ^{[2
,3
]}

Goslawski, P. ^{[1
]}

Hartmann, M. ^{[2
,3
]}

Kacharava, A. ^{[2
,3
]}

Khoukaz, A. ^{[1
]}

Kulessa, P. ^{[6
]}

Lorentz, B. ^{[2
,3
]}

Mersmann, T. ^{[1
]}

Mikirtychiants, S. ^{[2
,3
,7
]}

Ohm, H. ^{[2
,3
]}

Papenbrock, M. ^{[1
]}

Rausmann, T. ^{[1
]}

Serdyuk, V. ^{[2
,3
]}

Stroeher, H. ^{[2
,3
]}

Taeschner, A. ^{[1
]}

Valdau, Yu. ^{[7
,8
]}

Wilkin, C. ^{[9
]}

机构：

[1] Univ Munster, Inst Kernphys, D-48149 Munster, Germany

[2] Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany

[3] Forschungszentrum Julich, Julich Ctr Hadron Phys, D-52425 Julich, Germany

[4] Tbilisi State Univ, Inst High Energy Phys, GE-0186 Tbilisi, Georgia

[5] JINR, Lab Nucl Problems, RU-141980 Dubna, Russia

[6] H Niewodniczanski Inst Nucl Phys PAN, PL-31342 Krakow, Poland

[7] Petersburg Nucl Phys Inst, Dept High Energy Phys, RU-188350 Gatchina, Russia

[8] Univ Bonn, Helmholtz Inst Strahlen & Kernphys, D-53115 Bonn, Germany

[9] UCL, Dept Phys & Astron, London WC1E 6BT, England

来源：

EUROPEAN PHYSICAL JOURNAL A | 2014年 / 50卷 / 06期

关键词：

DEUTERON ELASTIC-SCATTERING; TOTAL CROSS-SECTIONS; MESON PRODUCTION; PI-PI; HYDROGEN; NUCLEI; COSY; ABC;

D O I：

10.1140/epja/i2014-14102-2

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：

The differential cross section for the exclusive dp -> He-3 pi(+)pi(-) reaction has been measured with high resolution and large statistics over a large fraction of the backward He-3 hemisphere at the excess energy 265 MeV using the COSY-ANKE magnetic spectrometer. Though the well-known ABC enhancement is observed in the pi(+)pi(-) spectrum, the differences detected between the pi He+3 and pi He-3 invariant-mass distributions show that there must be some isospin-one pi pi production even at relatively low excess energies. The invariant-mass differences are modeled in terms of the sequential decay N*(1440) -> Delta(1232)pi -> N pi pi.

引用

页码：1 / 7

页数：7

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