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Heavy hadron molecules in effective field theory: the emergence of exotic nuclear landscapes
The European Physical Journal A ( IF 2.6 ) Pub Date : 2020-04-07 , DOI: 10.1140/epja/s10050-020-00099-8
Manuel Pavon Valderrama

Heavy hadron molecules were first theorized from a crude analogy with the deuteron and the nuclear forces binding it, a conjecture which was proven to be on the right track after the discovery of the X(3872). However, this analogy with nuclear physics has not been seriously exploited beyond a few calculations in the two- and three-body sectors, leaving a great number of possible theoretical consequences unexplored. Here we show that nuclear and heavy hadron effective field theories are formally identical: using a suitable notation, there is no formal difference between these two effective field theories. For this, instead of using the standard heavy superfield notation, we have written the heavy hadron interactions directly in terms of the light quark degrees of freedom. We give a few examples of how to exploit this analogy, e.g. the calculation of the two-pion exchange diagrams. Yet the most relevant application of the present idea is the conjecture of exotic nuclear landscapes, i.e. the possibility of few heavy hadron bound states with characteristics similar to those of the standard nuclei.

中文翻译:

有效场论中的重强子分子:奇异核景观的出现

重质子分子首先是从与氘核的粗略类比中推论出来的,而核力则将其束缚在一起,这一推测在发现X之后被证明是正确的(3872)。但是,除了在两体和三体领域进行了几次计算外,还没有认真地利用这种与核物理的类比,因此未对大量可能的理论结果进行探索。在这里,我们证明核和重强子有效场理论在形式上是相同的:使用适当的符号,这两个有效场理论之间没有形式上的区别。为此,我们没有使用标准的重超场符号,而是直接根据轻夸克自由度编写了重强子相互作用。我们给出了一些如何利用这种类比的示例,例如,两点交换图的计算。然而,当前思想最相关的应用是外来核景观的猜想,即
更新日期:2020-04-07
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