A next-to-next-to-leading-order pp → ppπ0 transition operator in chiral perturbation theory

被引:34
作者
Dmitrasinovic, V [1 ]
Kubodera, K
Myhrer, F
Sato, T
机构
[1] Univ S Carolina, Dept Phys & Astron, Columbia, SC 29208 USA
[2] Osaka Univ, Dept Phys, Osaka 5600043, Japan
基金
美国国家科学基金会;
关键词
D O I
10.1016/S0370-2693(99)01075-8
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We present a systematic analysis of next-to-next-to-leading-order diagrams that contribute to the pp --> pp pi(o) production at threshold. Analytic expressions are given for the effective transition operators, and the relative importance of various types of diagrams is discussed. The vertex-correction-type graphs are found to give only small corrections to lower order graphs in conformity with expectations. By contrast, we find very large contributions from two-pion exchange graphs that can be interpreted as a part of effective sigma-meson exchange diagrams. The recoil correction to the pion rescattering diagram also turns out to be large. (C) 1999 Published by Elsevier Science B.V. All rights reserved.
引用
收藏
页码:43 / 54
页数:12
相关论文
共 32 条
[1]   Effects of relativistic dynamics in pp->pp pi(0) near threshold [J].
Adam, J ;
Stadler, A ;
Pena, MT ;
Gross, F .
PHYSICS LETTERS B, 1997, 407 (02) :97-102
[2]   CHIRAL DYNAMICS IN NUCLEONS AND NUCLEI [J].
BERNARD, V ;
KAISER, N ;
MEISSNER, UG .
INTERNATIONAL JOURNAL OF MODERN PHYSICS E, 1995, 4 (02) :193-344
[3]   Novel approach to pion and eta production in proton-proton collisions near threshold [J].
Bernard, V ;
Kaiser, N ;
Meissner, UG .
EUROPEAN PHYSICAL JOURNAL A, 1999, 4 (03) :259-275
[4]   THE PP-]PP-PI(0) REACTION NEAR THE KINEMATICAL THRESHOLD [J].
BONDAR, A ;
CALEN, H ;
CARIUS, S ;
EKSTROM, C ;
FRANSSON, K ;
GUSTAFSSON, L ;
HAGGSTROM, S ;
HOISTAD, B ;
JOHANSSON, A ;
JOHANSSON, T ;
KILIAN, K ;
KULLANDER, S ;
KUPSC, A ;
KUZMIN, A ;
MOROSOV, B ;
MORTSELL, A ;
OELERT, W ;
POVTOREJKO, A ;
REISTAD, D ;
RUBER, R ;
SANDUKOVSKY, S ;
SCHUBERTH, U ;
SHWARTZ, B ;
STEPANIAK, J ;
SUKHANOV, A ;
TCHERNYSHEV, V ;
WATERS, M ;
WILHELMI, Z ;
ZABIEROWSKI, J ;
ZLOMANCZUK, J .
PHYSICS LETTERS B, 1995, 356 (01) :8-12
[5]  
Brown G. E., 1979, Mesons in nuclei, vol. I, P329
[6]   SOFT PIONEERING DETERMINATION OF INTERMEDIATE RANGE NUCLEON-NUCLEON INTERACTION [J].
BROWN, GE ;
DURSO, JW .
PHYSICS LETTERS B, 1971, B 35 (02) :120-&
[7]   pp->pp pi(0) reaction near threshold: A chiral power counting approach [J].
Cohen, TD ;
Friar, JL ;
Miller, GA ;
van Kolck, U .
PHYSICAL REVIEW C, 1996, 53 (06) :2661-2673
[8]  
DMITRASINOVIC V, UNPUB
[9]   Pion-nucleon scattering in chiral perturbation theory (I): Isospin-symmetric case [J].
Fettes, N ;
Meissner, UG ;
Steininger, S .
NUCLEAR PHYSICS A, 1998, 640 (02) :199-234
[10]  
GEDALIN E, 1998, NUCLTH9803029