g_ρππ与有限温度有限宽度有限能量求和规则

g ρππ 与有限温度有限宽度有限能量求和规则 g ρππ in Finite-Width Finite Energy Sum Rule at Finite Temperature 熊彦淇 XIONG Yanqi 1 first-author 刘觉平 LIU Jueping 1 武汉大学物理科学与技术学院 武汉大学物理科学与技术学院 Department of Physics and Technology,Wuhan University Department of Physics and Technology,Wuhan University 基于量子色动力学有限能量求和规则,分别在零温和有限温度情形下研究了介子有限宽度对于ρππ耦合常数的影响.计算结果发现不仅在温度T=0和T≠0时,ρ介子的有限宽度对于gρππ有显著影响,而且当温度接近手征对称性恢复的临界温度时,π-介子的有限宽度对于gρππ（Q2,T,Γρ,Γπ）亦有重大影响. In the framework of the finite-energy quantum chromodynamics sum rule,the effect of the finite-width of the mesons to the ρππ-coupling constant is investigated at zero and finite temperature respectively.It is found that not only the finite-width of the ρmeson has the notable influence to the values of gρ ππ both at T=0 and T≠0,but also it does the π meson at the temperature near the critical one for restoration of chiral symmetry. 量子色动力学有限能量求和规则 有限温度 有限宽度 耦合常数 quantum chromodynamics finite-energy sum rule finite temperature finite width coupling constant 10.14188/j.1671-8836.2013.03.016 O572.243 国家自然科学基金（10775105）资助项目;北京谱仪合作组研究基金项目;武汉大学研究项目（201103011,9yw201115） 2013-03-01 2021-04-01 3 59