Production of X(3872) accompanied by a soft pion at hadron colliders
| Autor: | Li-Ping He, Kevin Ingles, Eric Braaten |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Physics
Particle physics 010308 nuclear & particles physics Nuclear Theory High Energy Physics::Phenomenology Hadron Observable 01 natural sciences Distribution (mathematics) Pion 0103 physical sciences Bound state High Energy Physics::Experiment Production (computer science) Invariant mass Nuclear Experiment 010306 general physics X(3872) |
| Zdroj: | Physical Review D. 100 |
| ISSN: | 2470-0029 2470-0010 |
| DOI: | 10.1103/physrevd.100.094006 |
| Popis: | If the $X(3872)$ is a weakly bound charm-meson molecule, it can be produced by the creation of ${D}^{*0}{\overline{D}}^{0}$ or ${D}^{0}{\overline{D}}^{*0}$ 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 ${D}^{*}{\overline{D}}^{*}$ at short distances followed by the rescattering of the charm-meson pair into $X\ensuremath{\pi}$. At a high-energy hadron collider, the prompt cross section from this mechanism has a narrow peak in the $X\ensuremath{\pi}$ invariant mass distribution near the ${D}^{*}{\overline{D}}^{*}$ 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 $X{\ensuremath{\pi}}^{\ifmmode\pm\else\textpm\fi{}}$ distribution to the cross section for producing $X$ without an accompanying pion suggests that the peak may be observable at the LHC. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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