论文标题
GALILEAN-INVARIANT XEFT在接下来的订单上
Galilean-Invariant XEFT at Next-to-Leading Order
论文作者
论文摘要
XEFT是一种用于魅力介子和乳头的低能有效田间理论，可系统地改进$ x（3872）$共振。为了简化超出领先顺序的计算，我们引入了Xeft的新公式，并具有动态场，用于共振通道中的一对魅力介子。我们通过引入一种新的翻新方案来简化XEFT的重归其化，该方案涉及在复杂的$ d^{*0} \ bar d^0 $阈值下在复杂的$ d^{*0} \ bar d^0 $阈值下的减法。通过使用Galilean-Invariant Xeft来计算$ x $的复杂极能和$ d^{*0} \ bar d^0 $散射幅度到近次到领先顺序，可以说明新的配方和新的重新规定方案。
XEFT is a low-energy effective field theory for charm mesons and pions that provides a systematically improvable description of the $X(3872)$ resonance. To simplify calculations beyond leading order, we introduce a new formulation of XEFT with a dynamical field for a pair of charm mesons in the resonant channel. We simplify the renormalization of XEFT by introducing a new renormalization scheme that involves the subtraction of amplitudes at the complex $D^{*0} \bar D^0$ threshold. The new formulation and the new renormalization scheme are illustrated by calculating the complex pole energy of $X$ and the $D^{*0} \bar D^0$ scattering amplitude to next-to-leading order using Galilean-invariant XEFT.
