Axial anomaly, vector meson dominance and π0 → γγ at finite temperature

被引：7

作者：

Dominguez, CA ^{[1
]}

Loewe, M

机构：

[1] Univ Cape Town, Inst Theoret Phys & Astrophys, ZA-7700 Rondebosch, South Africa

[2] Pontificia Univ Catolica Chile, Fac Fis, Santiago 22, Chile

来源：

PHYSICS LETTERS B | 2000年 / 481卷 / 2-4期

基金：

新加坡国家研究基金会;

关键词：

D O I：

10.1016/S0370-2693(00)00453-6

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A thermal Finite Energy QCD Sum Rule is used to determine the temperature behaviour of the omega rho pi strong coupling. This coupling decreases with increasing T and vanishes at the critical temperature, a likely signal for quark deconfinement. This is then used in the Vector Meson Dominance (VMD) expression for the pi(0) --> gamma gamma amplitude, which is also found to vanish at the critical temperature, as expected. This result supports the validity of VMD at T not equal 0. However, if VMD would not hold at finite temperature, then there is no prediction for the pi(0) --> gamma gamma amplitude. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：295 / 298

页数：4

共 50 条

[1] Axial anomaly and vector meson dominance model
Klopot, Ya.
Oganesian, A.
Teryaev, O.
JETP LETTERS, 2014, 99 (12) : 679 - 684
[2] Axial anomaly and vector meson dominance model
Ya. Klopot
A. Oganesian
O. Teryaev
JETP Letters, 2014, 99 : 679 - 684
[3] Vector meson dominance, axial anomaly and the thermal behavior of gpwπ(T)
Dominguez, CA
Loewe, M
NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS, 2001, 96 : 184 - 188
[4] Vector meson dominance and grhoaa at finite temperature from QCD sum rules
Dominguez, C. A.
Fetea, M. S.
Loewe, M.
Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics, 406 (1-2):
[5] Vector meson dominance and the π0 transition form factor
Lichard, Peter
PHYSICAL REVIEW D, 2011, 83 (03):
[6] THE AXIAL ANOMALY AT FINITE TEMPERATURE
ITOYAMA, H
MUELLER, AH
NUCLEAR PHYSICS B, 1983, 218 (02) : 349 - 365
[7] AXIAL ANOMALY AT FINITE TEMPERATURE
CHATURVEDI, S
GUPTE, N
SRINIVASAN, V
JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL, 1985, 18 (15): : L963 - L967
[8] THE AXIAL FORMFACTOR OF THE NUCLEON HOW GOOD IS AXIAL-VECTOR MESON DOMINANCE
GARI, M
KAULFUSS, U
PHYSICS LETTERS B, 1984, 138 (1-3) : 29 - 31
[9] Vector-Meson-Dominance model contribution to π0 → 4γ
Silagadze, ZK
PHYSICA SCRIPTA, 2004, 70 (05) : 280 - 282
[10] VECTOR-MESON DOMINANCE CALCULATIONS FOR VBAR ANOMALY AND DIMUON PRODUCTION
BARGER, V
WEILER, T
PHILLIPS, RJN
PHYSICAL REVIEW D, 1975, 12 (09): : 2628 - 2631

← 1 2 3 4 5 →