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$X_0(2900)$ and $X_1(2900)$: hadronic molecules or compact tetraquarks | Hua-Xing Chen
; Wei Chen
; Rui-Rui Dong
; Niu Su
; | Date: |
17 Aug 2020 | Abstract: | Very recently the LHCb Collaboration reported their observation of the first
two fully open-flavor tetraquark states, the $X_0(2900)$ of $J^P = 0^+$ and the
$X_1(2900)$ of $J^P = 1^-$. We study their possible interpretations using the
method of QCD sum rules, paying special attention to an interesting feature of
this experiment that the higher resonance $X_1(2900)$ has a width significantly
larger than the lower one $X_0(2900)$. Our results suggest that the $X_0(2900)$
can be interpreted as the $S$-wave $D^{*-}K^{*+}$ molecule state of $J^P =
0^+$, and the $X_1(2900)$ can be interpreted as the $P$-wave compact
diquark-antidiquark tetraquark state of $J^P = 1^-$. | Source: | arXiv, 2008.07516 | Services: | Forum | Review | PDF | Favorites |
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