Research Proposal for an Experiment to Search for the Decay μ -&gt; eee

Blondel, A.; Bachmann, S.; Berger, N.; Schultz‐Coulon, H.‐C.; Straumann, U.; Eckert, Patrick; Wiedner, D.; Papa, A.; Fischer, P.; Kettle, P.‐R.; Windelband, B.; Grab, C.; Stoykov, A.; Shen, Wei; Gredig, R.; Ritt, Stefan Andreas; Kiehn, M.; Dissertori, G.; Hildebrandt, M.; Schöning, A.; Perić, I.; Pohl, M.; Bravar, A.; Robmann, P.; Wallny, R.

doi:10.48550/arxiv.1301.6113

Cited by 149 publications

(199 citation statements)

References 125 publications

(150 reference statements)

Supporting

Mentioning

196

Contrasting

Order By: Relevance

“…Right: Correlations of the branching ratios for the LFV processes µ → eγ, µ → 3e and τ → eγ for viable models with singlet-doublet fermion DM. Also shown are current (full lines) and future (dashed lines) exclusion limits [19,20,21,22,23,24].…”

Section: Fermion Dmmentioning

confidence: 99%

A radiative seesaw model with GeV singlet-doublet fermion and TeV triplet scalar dark matter

Klasen¹,

Fiaschi²,

May³

2019

Preprint

View full text Add to dashboard Cite

By extending the Standard Model with singlet-doublet fermions and triplet scalars, all odd under a new Z 2 symmetry, we introduce a radiative seesaw model that can simultaneously account for dark matter, explain the existence of neutrino masses and allow for gauge coupling unification. We explore the viable parameter space of the model after imposing collider, Higgs mass, dark matter, neutrino mass and lepton flavour violation constraints. We find that dark matter in this model is fermionic for masses below about 1 TeV and scalar above and observe a high degree of complementarity between direct detection and lepton flavour violation experiments, which should soon allow to fully probe the fermionic dark matter sector and at least partially the scalar dark matter sector.

show abstract

Section: Fermion Dmmentioning

confidence: 99%

A radiative seesaw model with GeV singlet-doublet fermion and TeV triplet scalar dark matter

Klasen¹,

Fiaschi²,

May³

2019

Preprint

View full text Add to dashboard Cite

show abstract

“…The three-body muon decay, µ + → e + e + e − also offers excellent prospects to look for CLFV. At present, the best bound is still that of SINDRUM II [5], BR(µ + → e + e + e − )< 1.0 × 10 −12 , expected to be significantly improved in the coming years by the Mu3e collaboration at PSI to around 10 −15 [6], possibly 10 −16 , should very high-intensity muon beams become available [1].…”

Section: Scientific Contextmentioning

confidence: 99%

COMET - A submission to the 2020 update of the European Strategy for Particle Physics on behalf of the COMET collaboration

Angélique,

Cârloganu,

da Silva

et al. 2018

Preprint

View full text Add to dashboard Cite

The search for charged lepton flavour violation (CLFV) has enormous discovery potential in probing new physics Beyond the Standard Model (BSM). The observation of a CLFV transition would be an undeniable sign of the presence of BSM physics which goes beyond non-zero masses for neutrinos. Furthermore, CLFV measurements can provide a way to distinguish between different BSM models, which may not be possible through other means. So far muonic CLFV processes have the best experimental sensitivity because of the huge number of muons which can be produced at several facilities world-wide, and in the near future, new muon beam-lines will be built, leading to increases in beam intensity by several orders of magnitude. Among the muonic CLFV processes, µ → e conversion is one of the most important processes, having several advantages compared to other such processes.We describe the COMET experiment, which is searching for µ → e conversion in a muonic atom at the J-PARC proton accelerator laboratory in Japan. The COMET experiment has taken a staged approach; the first stage, COMET Phase-I, is currently under construction at J-PARC, and is aiming at a factor 100 improvement over the current limit. The second stage, COMET Phase-II is seeking another 100 improvement (a total of 10,000), allowing a single event sensitivity (SES) of 2.6 × 10 −17 with 2 × 10 7 seconds of data-taking. Further improvements by one order of magnitude, which arise from refinements to the experimental design and operation, are being considered whilst staying within the originally-assumed beam power and beam time. Such a sensitivity could be translated into probing many new physics constructions up to O(10 4 ) TeV energy scales, which would go far beyond the level that can be reached directly by collider experiments. The search for CLFV µ → e conversion is thus highly complementary to BSM searches at the LHC.

show abstract

“…The Mu3e experiment searches for the charged lepton flavor violating decay of µ → e + e − e − [1]. It aims to exploit branching ratios up to 10 −16 .…”

Section: Introductionmentioning

confidence: 99%

The Mu3e experiment: Toward the construction of an HV-MAPS vertex detector

Rudzki,

Augustin,

Deflorin

et al. 2021

Preprint

View full text Add to dashboard Cite

The Mu3e experiment searches for the lepton flavor violating decay µ + → e + e + e − with an ultimate aimed sensitivity of 1 event in 10 16 decays. This goal can only be achieved by reducing the material budget per tracking layer to X/X 0 ≈ 0.1 %. High-Voltage Monolithic Active Pixel Sensors (HV-MAPS) which are thinned to 50 µm serve as sensors. Gaseous helium is chosen as coolant.Results of recent studies related to the sensor prototypes, the helium cooling, and module prototyping are presented. The recent chip submission MuPix10 has proven its functionality regarding efficiency and time resolution. The helium cooling system for the inner tracker could be verified using a full-scale prototype. A complete prototype equipped with MuPix10 chips will be tested inside the Mu3e magnet in summer 2021.

show abstract

Research Proposal for an Experiment to Search for the Decay μ -> eee

Cited by 149 publications

References 125 publications

A radiative seesaw model with GeV singlet-doublet fermion and TeV triplet scalar dark matter

A radiative seesaw model with GeV singlet-doublet fermion and TeV triplet scalar dark matter

COMET - A submission to the 2020 update of the European Strategy for Particle Physics on behalf of the COMET collaboration

The Mu3e experiment: Toward the construction of an HV-MAPS vertex detector

Contact Info

Product

Resources

About