Role of the Δ isobar in the reaction NN→NNπ near threshold

被引：67
|
作者：
Hanhart, C [1 ]
Haidenbauer, J
Krehl, O
Speth, J
机构：
[1] Univ Bonn, Inst Theoret Kernphys, D-53115 Bonn, Germany
[2] Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany
来源：
PHYSICS LETTERS B | 1998年 / 444卷 / 1-2期
关键词：
D O I：
10.1016/S0370-2693(98)01385-9
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
A model calculation for pion production in nucleon-nucleon collisions is presented. Direct production, pion rescattering and contributions from pair diagrams are taken into account. The amplitudes for the elementary processes are based on well established microscopic models of nucleon-nucleon and pion-nucleon scattering. The Delta(1232) is included explicitly and is found to play an important role even at energies close to production threshold. A good overall agreement with existing data from the pion production threshold up to the Delta resonance region is achieved. (C) 1998 Published by Elsevier Science B.V. All rights reserved.
引用
收藏
页码：25 / 31
页数：7
相关论文
共 50 条
  • [21] Theoretical study of the NN→NNππ reaction
    Alvarez-Ruso, L
    Oset, E
    Hernandez, E
    NUCLEAR PHYSICS A, 1998, 633 (03) : 519 - 543
  • [22] ISOBAR CONTRIBUTIONS TO THE NN INTERACTION IN THE SKYRME MODEL
    DEPACE, A
    MUTHER, H
    FAESSLER, A
    NUCLEAR PHYSICS A, 1986, 457 (3-4) : 541 - 554
  • [23] Comment on ''Role of heavy meson exchange in near threshold NN->d pi''
    Niskanen, JA
    PHYSICAL REVIEW C, 1996, 53 (01): : 526 - 528
  • [24] EXTENSION OF THE BONN MESON EXCHANGE NN POTENTIAL ABOVE PION-PRODUCTION THRESHOLD - ROLE OF THE DELTA-ISOBAR
    ELSTER, C
    HOLINDE, K
    SCHUTTE, D
    MACHLEIDT, R
    PHYSICAL REVIEW C, 1988, 38 (04): : 1828 - 1842
  • [25] The reaction NN→NNπ in effective field theory
    Hanhart, C
    PROGRESS IN PARTICLE AND NUCLEAR PHYSICS, VOL 50, NO 2: QUARKS IN HADRONS AND NUCLEI, 2003, 50 (02): : 227 - 234
  • [26] Production of φ mesons in near-threshold πN and NN reactions
    A.I. Titov
    B. Kämpfer
    B.L. Reznik
    The European Physical Journal A - Hadrons and Nuclei, 2000, 7 (4): : 543 - 557
  • [27] ROLE OF HEAVY MESON-EXCHANGE IN NEAR-THRESHOLD NN -] D-PI
    HOROWITZ, CJ
    PHYSICAL REVIEW C, 1993, 48 (06): : 2920 - 2925
  • [28] MODEL DEPENDENCE OF UNITARY ISOBAR MODEL TREATMENTS OF NN-]NN-PI AT INTERMEDIATE ENERGIES
    DUBACH, J
    KLOET, WM
    SILBAR, RR
    TJON, JA
    VANFAASSEN, E
    PHYSICAL REVIEW C, 1986, 34 (03): : 944 - 955
  • [29] The role of meson retardation in the NN interaction above pion threshold
    Schwamb, M
    Arenhövel, H
    NUCLEAR PHYSICS A, 2001, 690 (04) : 647 - 681
  • [30] NON-ITERATIVE ISOBAR DIAGRAMS AND THEIR EFFECT IN NN SCATTERING
    HOLINDE, K
    MACHLEIDT, R
    FAESSLER, A
    MUTHER, H
    ANASTASIO, MR
    PHYSICAL REVIEW C, 1981, 24 (03): : 1159 - 1174
12345