Search for a Dark Photon ine+e-Collisions atBaBar

By J. Lees, V. Poireau, V. Tisserand, E. Grauges, A. Palano, G. Eigen, B. Stugu, D. Brown, M. Feng, L. Kerth and 302 more. 2014

387 citations recorded by the source corpus.

Dark sectors charged under a new Abelian interaction have recently received much attention in the context of dark matter models. These models introduce a light new mediator, the so-called dark photon (A'), connecting the dark sector to the standard model. We present a search for a dark photon in the reaction e+e-→γA', A'→e+e-, μ+μ- using 514 fb-1 of data collected with the BABAR detector. We observe no statistically significant deviations from the standard model predictions, and we set 90% confidence level upper limits on the mixing strength between the photon and dark photon at the level of10-4-10-3 for dark photon masses in the range 0.02–10.2 GeV We further constrain the range of the parameter space favored by interpretations of the discrepancy between the calculated and measured anomalous magnetic moment of the muon.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/80f4a7895a42d6d79243e28cd8a7e395ede5d949

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Citations in the corpus

Refined bounds on MeV-scale thermal dark sectors from BBN and the CMB (2019, background): “Light dark matter particles and their potential mediators with the dark sector have been searched for at particle colliders [40–47], beam dump experiments [48–50], neutrino experiments [51–56], neutrino telescopes [57–59], as well as in direct [60–67] and indirect [68–70] dark matter detection exper”
Illuminating dark photons with high-energy colliders (2014, background): “The purple region shows the current EWPT constraints (this work, see section 3), while the gray region is a limit from BaBar [61].”
Dark matter, millicharges, axion and scalar particles, gauge bosons, and other new physics with LDMX (2018, methodology): “The existing constraints from beam dumps [92, 110], neutrino scattering experiments [112, 113], and BaBar [19] are shown in gray.”
Physics beyond colliders at CERN: beyond the Standard Model working group report (2019, methodology): “These experiments consider a variety of dark photon production mechanisms, such as meson decays (NA48/2 [191]), bremsstrahlung (A1 [192]), and annihilation (BaBar [190], KLOE [196–199], LHCb [200]).”
The Dark Photon (2020, neutral): “…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 KLOE (Anastasi et al., 2016; Archilli et al., 2012; Babusci et…”
SIMP spectroscopy (2015, methodology): “Starting from the low mV region, the first one (labeled BaBar, purple) is from a search at BaBar for Υ(3S) → γA0, where A0 is a pseudo-scalar boson that decays invisibly [38].”
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, 597, 598], HADES [599], KLOE 2013 [600] and 2014 [601], the test run results from APEX [602], BaBar 2009 [603] and 2014 [604], beam dump experiments E137, E141, and E774 [605–607], A1 [608], Orsay [609], U70 [610], CHARM [611”
Particle physics models for the 17 MeV anomaly in beryllium nuclear decays (2016, background): “An analogous search at BaBar is limited to mX > 20 MeV [74].”
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].”