论文标题
PNRQCD中强耦合Quarkonia的衰减和电磁产生
Decay and electromagnetic production of strongly coupled quarkonia in pNRQCD
论文作者
论文摘要
我们改善了重夸克的灭绝过程的PNRQCD方法，并对重夸金族的独家电磁产生进行了第一个PNRQCD预测。我们认为强烈的Quarkonia，即不是库仑的状态的Quarkonia。可能强烈的Qualkonia可能包括激发的charmonium和Postonemonium状态。为此，PNRQCD为衰减和独特的电磁产生NRQCD矩阵元素提供了表达式，这些矩阵元素依赖于原点的波形和很少的通用Gluon场相关器。我们分别以相对订单$ v^2 $和领先的顺序计算电磁衰减宽度和独家生产横截面，并分别以$ p $ - 波Quarkonia的范围为轻hadrons。我们还计算出Lepton对的衰减宽度$ 2s $和$ 3S $底部的状态，其比率将宽度的宽度与相对顺序$ v^2 $相对的宽度宽度。
We improve the pNRQCD approach to annihilation processes of heavy quarkonium and make first pNRQCD predictions for exclusive electromagnetic production of heavy quarkonium. We consider strongly coupled quarkonia, i.e., quarkonia that are not Coulombic bound states. Possible strongly coupled quarkonia include excited charmonium and bottomonium states. For these, pNRQCD provides expressions for the decay and exclusive electromagnetic production NRQCD matrix elements that depend on the wavefunctions at the origin and few universal gluon field correlators. We compute electromagnetic decay widths and exclusive production cross sections, and inclusive decay widths into light hadrons for $P$-wave quarkonia at relative order $v^2$ and leading order, respectively. We also compute the decay widths of $2S$ and $3S$ bottomonium states into lepton pairs and their ratios with the inclusive widths into light hadrons at relative order $v^2$.
