A search for decays of heavy neutrinos in the mass range 0.5–2.8 GeV

Dorenbosch, J.; Allaby, J.; Amaldi, U.; Barbiellini, G.; Berger, Christoph; Bergsma, F.; Capone, A.; Flegel, W.; Lanceri, L.; Metcalf, Michael; Nieuwenhuis, C.; Panman, J.; Winter, K.; Abt, I.; Aspiazu, J.; Büsser, F.W.; Daumann, H.; Gall, P. D.; Hebbeker, T.; Niebergall, F.; Schütt, P.; Stähelin, P.; Gorbunov, P.; Grigoriev, E.; Kaftanov, V.; Khovansky, V.; Rosanov, A.; Baroncelli, A.; Barone, L.; Borgia, B.; Bosio, C.; Diemoz, M.; Dore, U.; Ferroni, F.; Longo, E.; Luminari, L.; Monacelli, P.; Notaristefani, F. de; Pistilli, P.; Santacesaria, R.; Santoni, C.; Tortora, L.; Valente, V.

doi:10.1016/0370-2693(86)91601-1

Cited by 198 publications

(137 citation statements)

References 13 publications

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“…In the case of radiative return, the differential production cross section for the U(1) X gauge boson is given by [104] σ(e + e − → γA ) 18) where θ is the angle between the beam line and the photon momentum. The production cross section for gauged lepton flavour number and U(1) B−L follows from (3.18) with the replacements 19) making this channel particularly relevant for all gauge groups apart from U(1) Lµ−Lτ .…”

Section: E + E − Collidersmentioning

confidence: 99%

“…In proton beam dump experiments, such as CHARM [19], LSND [25] and U70/NuCal [31,37], as well as fixed-target experiments, such as SINDRUM I [24], NA48/2 [41], and the future SHiP facility [42,43], hidden photons are produced in Bremsstrahlung as well as in meson decays produced in proton collisions with the target material. Similarly, the recently proposed experiment FASER [95] 5 searching for very displaced hidden photon decays at the LHC is making use of these production mechanisms.…”

Section: Proton Beam Dump Experimentsmentioning

confidence: 99%

See 1 more Smart Citation

Hunting all the hidden photons

Bauer¹,

Foldenauer²,

Jaeckel³

2018

J. High Energ. Phys.

375

450

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We explore constraints on gauge bosons of a weakly coupled U(1) B−L , U(1) Lµ−Le , U(1) Le−Lτ and U(1) Lµ−Lτ . To do so we apply the full constraining power of experimental bounds derived for a hidden photon of a secluded U(1) X and translate them to the considered gauge groups. In contrast to the secluded hidden photon that acquires universal couplings to charged Standard Model particles through kinetic mixing with the photon, for these gauge groups the couplings to the different Standard Model particles can vary widely. We take finite, computable loop-induced kinetic mixing effects into account, which provide additional sensitivity in a range of experiments. In addition, we collect and extend limits from neutrino experiments as well as astrophysical and cosmological observations and include new constraints from white dwarf cooling. We discuss the reach of future experiments in searching for these gauge bosons.

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Section: E + E − Collidersmentioning

confidence: 99%

Section: Proton Beam Dump Experimentsmentioning

confidence: 99%

Hunting all the hidden photons

Bauer¹,

Foldenauer²,

Jaeckel³

2018

J. High Energ. Phys.

375

450

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“…For m H in the range (100 MeV-100 GeV) the limits jU eH j 2 ð10 À8 -10 À3 Þ were obtained in NA3 [32], CHARM [31], L3 [33], DELPHI [34] and Belle [35] experiments. Similar limits for sterile neutrino mixing with muon neutrino U H can be found in [36].…”

Section: B the Obtained Limitsmentioning

confidence: 95%

“…For larger neutrino masses, new decay channels open up which include kaons, eta, etc. [31][32][33][34][35]. Accelerator experiments with beam of neutrinos from and K decays constrain the coupling of still heavier neutrinos (see [36,37], and references therein).…”

Section: Introductionmentioning

confidence: 99%

New limits on heavy sterile neutrino mixing inB8decay obtained with the Borexino detector

Bellini¹,

Benziger²,

Bick³

et al. 2013

Phys. Rev. D

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If heavy neutrinos with mass m H ! 2m e are produced in the Sun via the decay 8 B ! 8 Be þ e þ þ H in a side branch of the pp chain, they would undergo the observable decay into an electron, a positron and a light neutrino H ! L þ e þ þ e À . In the present work Borexino data are used to set a bound on the existence of such decays. We constrain the mixing of a heavy neutrino with mass 1:5 MeV m H 14 MeV to be jU eH j 2 ð10 À3 À 4 Â 10 À6 Þ, respectively. These are tighter limits on the mixing parameters than obtained in previous experiments at nuclear reactors and accelerators.

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“…In the latter framework, the "smoking gun" signature is a monochromatic X-ray line from the loop level decay into an active neutrino and a single photon, induced by the mixing between active and sterile neutrinos required for DW production. In the freeze-in scenario, this mixing angle can be arbitrarily small, and there is essentially no direct coupling between the sterile neutrino dark matter candidate and the Standard Model particles; hence no signals arising from such active-sterile mixing that characterize sterile neutrino dark matter from DW, such as astrophysical signatures in gamma rays or direct production in searches for neutral leptons in laboratory experiments [44][45][46][47][48][49], are expected. The most promising observable imprints are instead of a cosmological nature: the phase space distribution of sterile neutrinos from freeze-in is distinct from that arising from DW, and can lead to possible deviations in free-streaming lengths of warm dark matter or the dark radiation content of the universe during Big Bang nucleosynthesis (BBN) or cosmic microwave background (CMB) decoupling.…”

mentioning

confidence: 99%

Cosmological imprints of frozen-in light sterile neutrinos

Roland

Shakya

2017

J. Cosmol. Astropart. Phys.

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We investigate observable cosmological aspects of sterile neutrino dark matter produced via the freeze-in mechanism. The study is performed in a framework that admits many cosmologically interesting variations: high temperature production via annihilation processes from higher dimensional operators or low temperature production from decays of a scalar, with the decaying scalar in or out of equilibrium with the thermal bath, in supersymmetric or non-supersymmetric setups, thus allowing us to both extract generic properties and highlight features unique to particular variations. We find that while such sterile neutrinos are generally compatible with all cosmological constraints, interesting scenarios can arise where dark matter is cold, warm, or hot, has nontrivial momentum distributions, or provides contributions to the effective number of relativistic degrees of freedom N eff during Big Bang nucleosynthesis large enough to be probed by future measurements.1 arXiv:1609.06739v2 [hep-ph]

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A search for decays of heavy neutrinos in the mass range 0.5–2.8 GeV

Cited by 198 publications

References 13 publications

Hunting all the hidden photons

Hunting all the hidden photons

New limits on heavy sterile neutrino mixing inB8decay obtained with the Borexino detector

Cosmological imprints of frozen-in light sterile neutrinos

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