Modification of ${\chi }_{c1}$(3872) and $\psi$(2$S$) production in $p$Pb collisions at $\sqrt{s_{NN}}=8.16$ TeV

Abstract

The LHCb collaboration measures production of the exotic hadron ${\chi }_{c1}$(3872) in proton-nucleus collisions for the first time. Comparison with the charmonium state $\psi$(2$S$) suggests that the exotic ${\chi }_{c1}$(3872) experiences different dynamics in the nuclear medium than conventional hadrons, and comparison with data from proton-proton collisions indicates that the presence of the nucleus may modify ${\chi }_{c1}$(3872) production rates. This is the first measurement of the nuclear modification factor of an exotic hadron.

All figures and tables, along with any supplementary material and additional information, are available at https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2023-026.html (LHCb public pages)

References in corpus (14)

• Multi-quark hadrons from Heavy Ion Collisions
• Study of the lineshape of the ${\chi }_{c1}(3872)$ state
• ${\mathrm{\Lambda }}_{\mathrm{c}}^{+}$ production and baryon-to-meson ratios in pp and p-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV at the LHC
• The nature of $X(3872)$ from high-multiplicity $pp$ collisions
• Evidence for X(3872) in PbPb collisions and studies of its prompt production at $\sqrt{s_{\mathrm{NN}}}=$ 5.02 TeV
• Study of the ${\psi }_2(3823)$ and ${\chi }_{c1}(3872)$ states in $B^{+}\to \left(J\psi {\pi }^{+}{\pi }^{-}\right)K^{+}$ decays
• Observation of multiplicity-dependent prompt ${\chi }_{c1}(3872)$ and $\psi (2S)$ production in $pp$ collisions
• Production of $X(3872)$ at High Multiplicity
• Measurement of $B^{+}$, $B^0$ and ${\Lambda }_b^0$ production in $p\mathrm{Pb}$ collisions at $\sqrt{s_{\mathrm{NN}}}=8.16\mathrm{TeV}$
• X(3872) Transport in Heavy-Ion Collisions
• Observation of sizeable $\omega$ contribution to ${\chi }_{c1}(3872)\to {\pi }^{+}{\pi }^{-}J/\psi$ decays
• Measurement of nuclear effects on $\psi (2S)$ production in p-Pb collisions at $\sqrt{{\text{s}}_{\mathrm{NN}}}=8.16$ TeV
• Observation of enhanced double parton scattering in proton-lead collisions at $\sqrt{s_{\mathrm{NN}}}=8.16$ TeV
• Observation of the $B_s^0\to {\chi }_{c1}(3872){\pi }^{+}{\pi }^{-}$ decay

Cited by in corpus (3)

• Production of exotic hadrons in $pp$ and nuclear collisions
• Interaction of exotic states in a hadronic medium: the $Z_c(3900)$ case
• Physics with high-luminosity proton-nucleus collisions at the LHC