Exposing strangeness: Projections for kaon electromagnetic form factors

Gao, Fei; Chang, Lei; Liu, Yu -Xin; Roberts, Craig D.; Tandy, Peter C.

doi:10.1103/PhysRevD.96.034024

Title: Exposing strangeness: Projections for kaon electromagnetic form factors

Journal Article · 27 August 2017 · Physical Review D

DOI: https://doi.org/10.1103/PhysRevD.96.034024 · OSTI ID:1389615

Gao, Fei ^[1]; Chang, Lei ^[2]; Liu, Yu -Xin ^[1]; Roberts, Craig D. ^[3]; Tandy, Peter C. ^[4]

Peking Univ., Beijing (China); Collaborative Innovation Center of Quantum Matter, Beijing (China)
Nankai Univ., Tianjin (China)
Argonne National Lab. (ANL), Argonne, IL (United States)
Kent State Univ., Kent, OH (United States)

A continuum approach to the kaon and pion bound-state problems is used to reveal their electromagnetic structure. For both systems, when used with parton distribution amplitudes appropriate to the scale of the experiment, Standard Model hard-scattering formulas are accurate to within 25% at momentum transfers Q² ≈ 8 GeV². There are measurable differences between the distribution of strange and normal matter within the kaons, e.g. the ratio of their separate contributions reaches a peak value of 1.5 at Q² ≈ 6 GeV². Its subsequent Q² evolution is accurately described by the hard scattering formulas. Projections for the ratio of kaon and pion form factors at timelike momenta beyond the resonance region are also presented. In conclusion, these results and projections should prove useful in planning next-generation experiments.

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Research Organization:: Argonne National Lab. (ANL), Argonne, IL (United States)

Sponsoring Organization:: National Key Basic Research Program of China; National Natural Science Foundation of China (NSFC); USDOE; USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)

Grant/Contract Number:: AC02-06CH11357

OSTI ID:: 1389615

Journal Information:: Physical Review D, Journal Name: Physical Review D Journal Issue: 3 Vol. 96; ISSN PRVDAQ; ISSN 2470-0010

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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