Triangle singularity in the production of X(3872) and a photon in e+e- annihilation

Braaten, Eric; He, Li-Ping; Ingles, Kevin

doi:10.1103/PhysRevD.100.031501

Title: Triangle singularity in the production of $X (3872)$ and a photon in $e^{+} e^{-}$ annihilation

Abstract

If the $X(3872)$ is a weakly bound charm-meson molecule, it can be produced in $e^+ e^-$ annihilation by the creation of $$D^{*0} \bar D^{*0}$$ from a virtual photon followed by the rescattering of the charm-meson pair into $$X$$ and a photon. A triangle singularity produces a narrow peak in the cross section for $$e^+ e^- \to X \gamma$$ about 2.2 MeV above the $$D^{*0} \bar{D}^{*0}$$ threshold. We predict the normalized cross section in the region near the peak. The peak from the triangle singularity may be observable by the BESIII detector.

Authors:

Braaten, Eric;

; Ingles, Kevin

Publication Date:: 2019-08-01

Research Org.:: The Ohio State Univ., Columbus, OH (United States)

Sponsoring Org.:: USDOE Office of Science (SC), High Energy Physics (HEP); National Science Foundation (NSF)

OSTI Identifier:: 1559078

Alternate Identifier(s):: OSTI ID: 1602471

Grant/Contract Number:: SC0011726; PHY-1607190

Resource Type:: Published Article

Journal Name:: Physical Review D

Additional Journal Information:: Journal Name: Physical Review D Journal Volume: 100 Journal Issue: 3; Journal ID: ISSN 2470-0010

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

Subject:: 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats


                    Braaten, Eric, He, Li-Ping, and Ingles, Kevin. Triangle singularity in the production of X(3872) and a photon in e+e- annihilation.  United States: N. p., 2019. 
Web.  doi:10.1103/PhysRevD.100.031501.

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                    Braaten, Eric, He, Li-Ping, & Ingles, Kevin. Triangle singularity in the production of X(3872) and a photon in e+e- annihilation.  United States.  https://doi.org/10.1103/PhysRevD.100.031501

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                    Braaten, Eric, He, Li-Ping, and Ingles, Kevin. Thu .  
"Triangle singularity in the production of X(3872) and a photon in e+e- annihilation".  United States.  https://doi.org/10.1103/PhysRevD.100.031501.

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@article{osti_1559078,

  title        = {Triangle singularity in the production of X(3872) and a photon in e+e- annihilation},

  author       = {Braaten, Eric and He, Li-Ping and Ingles, Kevin},

  abstractNote = {If the $X(3872)$ is a weakly bound charm-meson molecule, it can be produced in $e^+ e^-$ annihilation by the creation of $D^{*0} \bar D^{*0}$ from a virtual photon followed by the rescattering of the charm-meson pair into $X$ and a photon. A triangle singularity produces a narrow peak in the cross section for $e^+ e^- \to X \gamma$ about 2.2 MeV above the $D^{*0} \bar{D}^{*0}$ threshold. We predict the normalized cross section in the region near the peak. The peak from the triangle singularity may be observable by the BESIII detector.},

  doi          = {10.1103/PhysRevD.100.031501},

  journal      = {Physical Review D},

  number       = 3,

  volume       = 100,

  place        = {United States},

  year         = {2019},

  month        = {8}

}

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