K0K0 Analysis Summary

Summary

• Title: Analysis of K_SK_S Production
• Primary contact: Dene Hoffman, Gabriel Rodriguez
• Other contributions: Reinhard Schumacher, Sean Dobbs
• Data set used: GlueX-I and GlueX-II
  • Data analysis launch versions and ReactionFilter flags
    • Spring 2017:
      • ksks__B4 (Dene): analysis-2017_01-ver55.xml
      • ksks__B4_M16 (Gabriel): analysis-2017_01-ver55.xml
    • Spring 2018:
      • ksks__B4 (Dene): analysis-2018_01-ver19.xml
      • ksks__B4_M16 (Gabriel): analysis-2018_08-ver8.xml
    • Fall 2018:
      • ksks__B4 (Dene): analysis-2018_08-ver19.xml
      • ksks__B4_M16 (Gabriel): analysis-2018_08-ver19.xml
    • Spring 2020:
      • ksks__B4 (Dene): analysis-2019_11-ver04.xml
      • ksks__B4_M16 (Gabriel): analysis-2019_11-ver04.xml
  • Simulation sample summary: MCWrapper project IDs, etc.
• Observable / Goals:
  • Partial Wave Analysis in $K_{{S}}K_{{S}}$ channels

Related Analyses (if needed)

• $\pi ^{0}\pi ^{0}$ and $\eta \pi$ for comparisons?
• The $K_{{S}}K_{{L}}$ analysis strongly depends on our understanding of $K_{{S}}$ reconstruct since the $K_{{L}}$ is a missing particle.

Suggested Milestones

TBD

• preliminary results
• analysis draft

Related Theoretical Work

• Coupled channel analysis of ${\bar {p}}p\to \pi ^{0}\pi ^{0}\eta$, $\pi ^{0}\eta \eta$, and $K^{+}K^{-}\pi ^{0}$ at 900 MeV/c and of $\pi \pi$-scattering data
• Investigation of the lightest hybrid meson candidate with a coupled-channel analysis of ${\bar {p}}p$-, $\pi ^{-}p$- and $\pi \pi$-Data
  • Follow-up paper to the previous study, adds data from COMPASS ($\pi \eta (')$) to existing study of Crystal Barrel data
• sPlot: a statistical tool to unfold data distributions
  • Used for background subtraction in KsKs analysis (Dene)
• Isoscalar $\pi \pi$, $K{\bar {K}}$, $\eta \eta$ scattering and the $\sigma$, $f_{0}$, $f_{2}$ mesons from QCD
• Exclusive tensor meson photoproduction
  • Photoproduction prediction of $f_{2}(1270)/a_{2}(1320)$ cross sections at 8.5 GeV. Model by Vincent Mathieu
• Scalar and tensor resonances in $J/\psi$ radiative decays
  • Coupled channel analysis with BESIII data of the reactions $J/\psi \rightarrow \gamma \pi ^{0}\pi ^{0}/\gamma K_{S}K_{S}$.
• Moments of angular distribution and beam asymmetries in ηπ⁰ photoproduction at GlueX
  • Amplitudes for Partial Wave Analysis of two-pseudoscalar final states with linearly polarized photons
• Flatte-like distributions and the a_0(980)/f_0(980) mesons Eur. Phys. J. A arXiv
• Scalar Meson Photoproduction Phys. Rev. C arXiv
  • Photoproduction prediction of f₀(1500) cross sections at 5 GeV
• Resonance physics with γγ events Phys. Let. B
  • Prediction of f₂/a₂ → $K{\bar {K}}$ interference pattern. Model used by the ZEUS Collaboration to study the K_SK_S spectrum in quasireal photoproduction.
• J.J. Xie, E. Oset, L.S. Geng, "Photoproduction of the f2'(1525), a2(1320), K2*(1430)", Phys. Rev. C 93, 025202 (2016) arXiv, PRC
  • Vector-vector interaction model, disfavored by the CLAS measurements below.

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Previous Related Measurements

• (2018, CLAS) Double K_S^0 photoproduction off the proton at CLAS
  • Only previous photoproduction measurement
• (2018, BESIII) Amplitude analysis of the K_SK_S system produced in radiative J/psi decays
• (2006, ITEP) Analysis of the K_SK_S system from the reaction pi^-p -> K_SK_Sn at 40 GeV
• (2008, HERA) Inclusive K⁰_SK⁰_S resonance production in ep collisions at HERA Phys. Rev. Lett arXiv
• (2004, HERA) Observation of K^0_SK^0_S resonances in deep inelastic scattering at HERA
• (2001, LEP) K^0_SK^0_S final state in two-photon collisions and implications for glueballs
• (1997, Fermilab) Spin-parity analysis of the centrally produced K_SK_S system at 800 GeV
• (1976, SLAC) Resonances in the K_SK_S system

• (2020, CLAS) "First measurement of direct photoproduction of the a₂(1320)⁰ meson on the proton" arXiv, PRC

Expected Yield / Sensitivity

TBD

Presentations

Dene:

• Spring 2022 Collaboration Meeting
• APS DNP Fall 2021 Meeting
• Fall 2021 Collaboration Meeting
• Spring 2021 Collaboration Meeting
• Winter 2021 Collaboration Meeting
• Initial results in Fall 2020

Gabriel:

• APS DNP Fall 2022 Meeting
• Fall 2022 Collaboration Meeting
• APS SESAPS Fall 2021 Meeting
• JSA Poster Summer 2021 Meeting
• JSA Poster Winter 2021 Meeting

Other Resources (notes/code/etc.)

TBD