Limit on the production of a light vector gauge boson in phi meson decays with the KLOE detector

By D. Babusci, D. Badoni, I. Balwierz-Pytko, G. Bencivenni, C. Bini, C. Bloise, F. Bossi, P. Branchini, A. Budano, L. Balkest̊ahl and 60 more. 2012

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We present a new limit on the production of a light dark-force mediator with the KLOE detector at DA Phi NE. This boson, called U, has been searched for in the decay phi -> eta U, U -> e(+)e(-), analyzing the. decay eta -> pi(0)pi(0)pi(0) in a data sample of 1.7 fb(-1). No structures are observed in the e(+)e(-) invariant mass distribution over the background. This search is combined with a previous result obtained from the decay eta -> pi(+)pi(-)pi(0), increasing the sensitivity. We set an upper limit at 90% C.L. on the ratio between the U boson coupling constant and the fine structure constant of alpha'/alpha < 1.7 x 10(-5) for 30 < M-U < 400 MeV and alpha'/alpha <= 8 x 10(-6) for the sub-region 50 < M-U <210 MeV. This result assumes the Vector Meson Dominance expectations for the phi eta gamma* transition form factor. The dependence of this limit on the transition form factor has also been studied.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/ac2b1ec978f3674a9f93bd11f34cc33dc02ebd79

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Citations in the corpus

Searching for long-lived particles beyond the Standard Model at the Large Hadron Collider (2019, background): “exclusion limits from the electron and muon anomalous magnetic moment [19, 595, 596], HADES [597], KLOE 2013 [598] and 2014 [599], the test run results from APEX [600], BaBar 2009 [601] and 2014 [602], beam dump experiments E137, E141, and E774 [603–605], A1 [606], Orsay [607], U70 [608], CHARM [609”
The Dark Photon (2020, unknown): “Different dark-photon production mechanisms are used in the different experiments: meson decays (π0 → γA′, NA48/2 (Batley et al., 2015)), bremsstrahlung (e−Z → e−ZA′, A1 (Merkel et al., 2014)), annihilation (e+e− → γA′, BaBar (Lees et al., 2014)), and all these processes in different searches at KLO”
Revisiting Supernova 1987A constraints on dark photons (2016, methodology): “Above 2me, bounds from beam-dumps, B- and Φ-factories, fixed-target experiments, and precision measurements of the muon and electron (“ae”) anomalous magnetic moment are applicable [4, 12, 52–70].”
Particle physics models for the 17 MeV anomaly in beryllium nuclear decays (2016, methodology): “For example, the decay φ→ η(X → e+e−) used in deriving the KLOE constraints [64] is an s-wave in the axial case, implying a stronger bound than the p-wave–suppressed one in the vector case.”