New limits on hidden photons from past electron beam dumps

Andreas, Sarah; Niebuhr, C.; Ringwald, Andreas

doi:10.1103/physrevd.86.095019

Cited by 291 publications

(352 citation statements)

References 108 publications

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“…The average correlation between neighboring points is around 90%. Bounds at the level of 10 −4 -10 −3 for 0.02 < m A 0 < 10.2 GeV are set, significantly improving previous constraints derived from beamdump experiments [11,12,18], the electron anomalous magnetic moment [13], KLOE [14,15], WASA-at-COSY [16], HADES [17], A1 at MAMI [19], and the test run from APEX [20]. These results also supersede and extend the constraints based on a search for a light CP-odd Higgs boson at BABAR [21,22] with a smaller data set.…”

supporting

confidence: 52%

“…Dark photons could therefore be detected as narrow resonances in radiative e þ e − → γl þ l − (l ¼ e; μ) events. No unambiguous signal for a dark photon has been reported so far, and constraints have been set on the mixing strength between the photon and dark photon as a function of the dark photon mass [11][12][13][14][15][16][17][18][19][20][21][22]. Searches for an additional low-mass, dark gauge boson [23] or dark Higgs boson [24] have also yielded negative results.…”

mentioning

confidence: 99%

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New Light Shed on Dark Photons

Bryman¹

2014

Physics

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supporting

confidence: 52%

mentioning

confidence: 99%

New Light Shed on Dark Photons

Bryman¹

2014

Physics

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“…In both panels, the "Short-Lived" region indicates that the DM lifetime is shorter than the age of Universe. Assuming m γ d mγ d , additional constraints exist from beam-dump [82,83], fixedtarget [84,85], and colliding-beam experiments [86]; precision measurements [87]; stars [88,89]; and from the intergalactic diffuse photon background (IDPB). This final constraint is valid for hidden photons below 2m e 1 MeV, as these can decay to three photons and contribute to the diffuse photon background [34,90].…”

Section: Hidden Photinomentioning

confidence: 99%

Constraining light dark matter with diffuse X-ray and gamma-ray observations

Essig

Kuflik

McDermott

et al. 2013

J. High Energ. Phys.

310

431

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We present constraints on decaying and annihilating dark matter (DM) in the 4 keV to 10 GeV mass range, using published results from the satellites HEAO-1, INTEGRAL, COMPTEL, EGRET, and the Fermi Gamma-ray Space Telescope. We derive analytic expressions for the gamma-ray spectra from various DM decay modes, and find lifetime constraints in the range 10 24 − 10 28 sec, depending on the DM mass and decay mode. We map these constraints onto the parameter space for a variety of models, including a hidden photino that is part of a kinetically mixed hidden sector, a gravitino with Rparity violating decays, a sterile neutrino, DM with a dipole moment, and a dark pion. The indirect constraints on sterile-neutrino and hidden-photino DM are found to be more powerful than other experimental or astrophysical probes in some parts of parameter space. While our focus is on decaying DM, we also present constraints on DM annihilation to electron-positron pairs. We find that if the annihilation is p-wave suppressed, the galactic diffuse constraints are, depending on the DM mass and velocity at recombination, more powerful than the constraints from the Cosmic Microwave Background.

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“…(1) are shown in Fig. 4, together with the constraints from the SLAC E141 and FNAL E774 [16], KLOE [17], WASA [18], HADES [19], A1 [20], APEX [21] and BaBar [22] The prompt DP decay assumption that is fundamental to the analysis reported here is justified a posteriori by the achieved limits. Given the 60 GeV/c beam, the maximum DP mean path in the laboratory reference frame corresponds to an energy of approximately…”

Section: Data Samplementioning

confidence: 99%

Search for the dark photon in $\pi^0$ decays

Fantechi¹

2016

Proceedings of the European Physical Society Conference on High Energy Physics — PoS(EPS-HEP2015)

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A sample of 1.69 × 10 7 fully reconstructed π 0 → γ e + e − decay candidates collected by the NA48/2 experiment at CERN in 2003-2004 is analyzed to search for the dark photon ( A ) production in the π 0 → γ A decay followed by the prompt A → e + e − decay. No signal is observed, and an exclusion region in the plane of the dark photon mass m A and mixing parameter ε 2 is established. The obtained upper limits on ε 2 are more stringent than the previous limits in the mass range 9 MeV/c 2 < m A < 70 MeV/c 2 . The NA48/2 sensitivity to the dark photon production in the K ± → π ± A decay is also evaluated. Letters B 746 (2015) [178][179][180][181][182][183][184][185] IntroductionKaons are a source of tagged neutral pion decays, and high intensity kaon experiments provide opportunities for precision π 0 decay measurements. The NA48/2 experiment at the CERN SPS collected a large sample of charged kaon (K ± ) decays in flight, corresponding to about 2 × 10 11 K ± decays in the fiducial decay volume. This letter reports the search for a hypothetical dark photon (DP, denoted A ) using a large sample of tagged π 0 mesonsIn a rather general set of hidden sector models with an extra U (1) gauge symmetry [1], the interaction of the DP with the visible sector proceeds through kinetic mixing with the Standard Model (SM) hypercharge. Such scenarios with GeV-scale dark matter provide possible explanations to the observed rise in the cosmic-ray positron fraction with energy and the muon gyromag-. The DP is characterized by two a priori unknown parameters, the mass m A and the mixing parameter ε 2 . Its possible production in the π 0 decay and its subsequent decay proceed via the chain π 0 → γ A , A → e + e − . The expected branching fraction of the above π 0 decay is [3] B(π( 1) which is kinematically suppressed as m A approaches m π 0 . In the DP mass range 2m e < m A < m π 0 accessible in pion decays, the only allowed tree-level decay into SM fermions is A → e + e − , while the loop-induced SM decays ( A → 3γ , A → νν) are highly suppressed. Therefore, for a DP decaying only into SM particles, This analysis is performed assuming that the DP decays at the production point (prompt decay), which is valid for sufficiently large values of m A and ε 2 , as quantified in Section 5. In this case, the DP production and decay signature is identical to that of the Dalitz decay π 0 D → e + e − γ , which therefore represents an irreducible but well controlled background and determines the sensitivity. B(A →eThe NA48/2 experiment provides pure π 0 D decay samples through the reconstruction of K ± → π ± π 0 andis considered as a background in the K μ3sample. The K ± → π 0 e ± ν decay is not considered for this analysis because of the ambiguity due to three e ± particles in the final state. Beam, detector and data sampleThe NA48/2 experiment used simultaneous K + and K − beams produced by 400 GeV/c primary CERN SPS protons impinging on a beryllium target. Charged particles with momenta of (60 ± 3) GeV/c were selected by an achromatic syste...

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New limits on hidden photons from past electron beam dumps

Cited by 291 publications

References 108 publications

New Light Shed on Dark Photons

New Light Shed on Dark Photons

Constraining light dark matter with diffuse X-ray and gamma-ray observations

Search for the dark photon in $\pi^0$ decays

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