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arXiv 1409.2228nucl-thhep-ph
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在$D$和$B$介子的QCD求和规则中定义介质特定凝聚体

Defining medium-specific condensates in QCD sum rules for $D$ and $B$ mesons

T. Buchheim, T. Hilger, B. Kampfer

摘要:

强相互作用环境中$D$和$B$介子的QCD求和规则要求分解与张量结构有关的Gibbs平均算符。我们提出了一个程序,这些运营商分解成真空和介质特定的部分,从而定义平原介质特定的凝聚系数消失在真空中。我们的分解允许识别的潜在元素的序参量的手征恢复,特别是更高的质量维度的夸克凝聚,这将被掩盖,否则如果运营商与未收缩的洛伦兹指数将被链接到DIS振幅。

英文摘要:

QCD sum rules for $D$ and $B$ mesons in a strongly interacting environment require the decomposition of Gibbs averaged operators related to tensor structures. We present a procedure to decompose these operators into vacuum and medium-specific parts, thus defining plain medium-specific condensates with coefficients vanishing in vacuum. Our decomposition allows for an identification of potential elements of order parameters for chiral restoration, in particular for higher mass-dimension quark-condensates which would be masked otherwise if operators with uncontracted Lorentz indices would be linked to DIS amplitudes.

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