An alternative way to decipher the nature of the doubly charmed tetraquark $T_{cc}(3875{)}^{+}$: its antiparticle $T_{\bar{c}\bar{c}}(3875{)}^{-}$ photoproduction off nuclei near threshold

Abstract

We study the inclusive photoproduction of $T_{\bar{c}\bar{c}}(3875{)}^{-}$ mesons (which are the antiparticles of the doubly charmed tetraquarks $T_{cc}(3875{)}^{+}$ discovered recently by the LHCb Collaboration) from nuclei in the near-threshold energy region within the nuclear spectral function approach by considering incoherent direct ($\gamma p(n)\to D^{+}(D^0)T_{\bar{c}\bar{c}}(3875{)}^{-}{\Lambda }_c^{+}$) photon--nucleon $T_{\bar{c}\bar{c}}(3875{)}^{-}$ creation processes as well as five possible different scenarios for their internal structure with the main goal of clarifying the possibility to decipher this structure (and, hence, that of $T_{cc}(3875{)}^{+}$) in photoproduction via integral and differential observables. We calculate the absolute and relative excitation functions for $T_{\bar{c}\bar{c}}(3875{)}^{-}$ production off ${}^{12}$C and ${}^{184}$W target nuclei at near-threshold photon beam energies of 30--38 GeV, the absolute differential cross sections for their production off these target nuclei at laboratory polar angles of 0${}^{\circ }$--10${}^{\circ }$ as well as the A and momentum dependences of the relative (transparency ratios) cross sections for $T_{\bar{c}\bar{c}}(3875{)}^{-}$ production at photon energy of 35 GeV within the adopted scenarios for the $T_{\bar{c}\bar{c}}(3875{)}^{-}$ meson intrinsic structure. We demonstrate that the absolute and relative observables considered show a certain sensitivity to these scenarios. Therefore, the measurement of such observables in future experiments at the proposed high-luminosity electron-ion colliders EIC and EicC in the US and China in the near-threshold energy region might shed light on the $T_{cc}(3875{)}^{+}$ internal structure.

arXiv comment23 pages, 10 figures. arXiv admin note: substantial text overlap with arXiv:2405.01089

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Cited by in corpus (2)

• Photon-induced production of the exotic charged charmonium-like state $Z_c(3900)$ off nuclear targets and its internal structure
• Investigating the two-pion exchange of the double charm $D{D}^{\ast }$ chiral interactions and $T_{cc}$