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نویسندگان
چکیده
In this work, we treat the newly observed doubly charmed four-quark state $ T_{cc}^{+}$ as an axial-vector tetraquark with content $cc\overline{u} \overline{d}$, and calculate its spectroscopic parameters width. The mass current coupling of $T_{cc}^{+}$ are found by means QCD two-point sum rule method taking into account quark, gluon mixed condensates up to dimension $10$. width is evaluated using partial widths decay processes $T_{cc}^{+} \to \widetilde{ T}\pi ^{0}$ T_{cc;\overline{u}\overline{u}}^{0}\pi ^{+}$ , where $\widetilde{T}=cc\overline{u}\overline{d}$ $T_{cc;\overline{u} \overline{u}}^{0}$ scalar tetraquarks. To compute first process, apply three-point approach extract numerical value strong $g$ that corresponds vertex $T_{cc}^{+}\widetilde{T}\pi ^{0}$. second estimated isospin symmetry prediction obtained for channel. Our results $m=(3868\pm 124)~\mathrm{MeV}$ \Gamma=(489\pm 92)~\mathrm{keV}$ in a nice agreement recent measurements LHCb collaboration.
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ژورنال
عنوان ژورنال: Nuclear Physics B
سال: 2022
ISSN: ['1873-1562', '0550-3213']
DOI: https://doi.org/10.1016/j.nuclphysb.2022.115650