Production of $X(3872)$ Accompanied by a Soft Pion at Hadron Colliders

Abstract

If the $X(3872)$ is a weakly bound charm-meson molecule, it can be produced by the creation of $D^{\ast 0}{\bar{D}}^0$ or $D^0{\bar{D}}^{\ast 0}$ at short distances followed by the formation of the bound state from the charm-meson pair. The $X$ can also be produced by the creation of $D^{\ast }{\bar{D}}^{\ast }$ at short distances followed by the rescattering of the charm-meson pair into $X\pi$. At a high-energy hadron collider, the prompt cross section from this mechanism has a narrow peak in the $X\pi$ invariant mass distribution near the $D^{\ast }{\bar{D}}^{\ast }$ threshold from a charm-meson triangle singularity. An order-of-magnitude estimate of the ratio of the cross section for producing the peak in the $X{\pi }^{\pm }$ distribution to the cross section for producing $X$ without an accompanying pion suggests that the peak may be observable at the LHC.

arXiv comment15 pages, 4 figures. Extensively revised to focus mainly on the production of $X(3872)$ plus a pion. Some material on cross sections for producing $X(3872)$ without a pion was removed. An error in identifying the region of validity in the $X\pi$ invariant mass was corrected. arXiv admin note: text overlap with arXiv:1902.03259, arXiv:1811.08876

References in corpus (28)

• Observation of a narrow charmonium-like state in exclusive B+ -> K+ pi+pi- J/psi decays
• Observation of a New Narrow Charmonium State in Exclusive B+-->K+ pi+pi- J/psi Decays
• Hadronic molecules
• Universality in Few-body Systems with Large Scattering Length
• The hidden-charm pentaquark and tetraquark states
• Multiquark Resonances
• Non-Standard Heavy Mesons and Baryons, an Experimental Review
• Heavy-Quark QCD Exotica
• Observation of the Narrow State $X(3872)\to J/\psi {\pi }^{+}{\pi }^{-}$ in $\bar{p}p$ Collisions at $\sqrt{s}=1.96 \TeV$
• Exotics: Heavy Pentaquarks and Tetraquarks
• Observation and Properties of the X(3872) Decaying to J/psi pi+ pi- in p-p(bar) Collisions at sqrt(s) = 1.96 TeV
• Determination of the X(3872) meson quantum numbers
• Exotic Hadrons with Heavy Flavors -X, Y, Z and Related States-
• The D*0 D0bar threshold resonance
• Multiquark States
• Interference and binding effects in decays of possible molecular component of X(3872)
• Pion Interactions in the X(3872)
• Is the X(3872) Production Cross Section at Tevatron Compatible with a Hadron Molecule Interpretation?
• Observation of X(3872) production in pp collisions at sqrt(s)= 7 TeV
• Production of the X(3872) at the Tevatron and the LHC
• Measurement of the X(3872) production cross section via decays to J/psi pi pi in pp collisions at sqrt(s) = 7 TeV
• The XYZ states revisited
• Measurements of $\psi (2S)$ and $X(3872)\to J/\psi {\pi }^{+}{\pi }^{-}$ production in $pp$ collisions at $\sqrt{s}=8$ TeV with the ATLAS detector
• Factorization in the Production and Decay of the X(3872)
• Scattering of an Ultrasoft Pion and the X(3872)
• Observation of the decay $X(3872)\to {\pi }^0{\chi }_{c1}(1P)$
• Galilean-Invariant XEFT
• A precise isospin analysis of B -> Dbar(*) D(*) K decays

Cited by in corpus (12)

• Pentaquark and Tetraquark states
• Chiral perturbation theory for heavy hadrons and chiral effective field theory for heavy hadronic molecules
• XYZ spectroscopy at electron-hadron facilities: Exclusive processes
• Triangle Singularity in the Production of $T_{cc}^{+}$(3875) and a Soft Pion
• Charm-meson Triangle Singularity in $e^{+}{e}^{-}$ Annihilation into $D^{\ast 0}{\bar{D}}^0+\gamma$
• Measurement of ${\chi }_{c1}(3872)$ production in proton-proton collisions at $\sqrt{s}=8$ and $13$ TeV
• $D^{\pm }{D}^{\ast \mp }$ Hadronic Atom as a Key to Revealing the $X(3872)$ Mystery
• Galilean-Invariant XEFT at Next-to-Leading Order
• Triangle singularity appearing as an $X(3872)$-like peak in $B\to (J/\psi {\pi }^{+}{\pi }^{-})K\pi$
• Production of $X(3872)$ and a Photon in $e^{+}{e}^{-}$ Annihilation
• Studies of $X(3872)$ and $\psi (2S)$ production in $p\bar{p}$ collisions at 1.96 TeV
• Latest D0 results on exotic hadrons produced in $p\bar{p}$ collisions