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Schwieger, J.; Faessler, Amand; Kosmas, T. S.

doi:10.1023/a:1021280211944

Cited by 6 publications

(31 citation statements)

References 4 publications

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“…From the existing data on R ße -in 48 Ti and 208 Pb and the expected sensitivity of the designed MECO experiment on 27 A1 [7] we obtained stringent upper limits on the quantities ρ and Q introduced in Eqs. (11) and (20).…”

Section: Discussionmentioning

confidence: 99%

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The exotic μ~ —» e~ conversion in Nuclei: An Interplay of Atomic, Nuclear and Particle Physics.

Kosmas

2019

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The partial rates of all kinematically accessible channels (for coherent and incoherent processes) of the exotic μ~ —» e~ conversion in the currently interesting nuclei 27Al, 4 8Ti, and 2 0 8Pb are investigated. The assumed muon-number violation involves exchange of various particles in conventional extentions of the standard model and in minimal supersymmetric models with R-parity conserving and R-parity violating interactions. The transition matrix elements obtained are used to extract very severe constraints for the flavor violation parameters entering the effective Lagrangians resulting in the framework of specific particle models.

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Section: Discussionmentioning

confidence: 99%

“…Some special cases are discussed in Refs [4,18,21]. and used in xnir>previous works[6,[18][19][20][21][22].…”

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confidence: 99%

The exotic μ~ —» e~ conversion in Nuclei: An Interplay of Atomic, Nuclear and Particle Physics.

Kosmas

2019

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“…The basic physics of this process has been studied extensively [19][20][21][22][23][24]. The process can occur both coherently, with the nucleus left in its ground state, and incoher ently, with the nucleus excited [25,26]. The coherent component is large and its magnitude has recently been re-evaluated for various nuclei [16].…”

Section: μ~ν -> E~n Experimentsmentioning

confidence: 99%

Improved tests of muon and electron flavor symmetry in muon processes

Molzon¹

2020

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I review the motivation for and status of searches for violation of muon and electron number conservation, concentrating on muon initiated processes. I then discuss the progress expected in the next few years, concentrating on a new experiment, E940 at BNL (the MECO experiment). It will improve the experimental sensitivity for the process μ^-Ν —> e^-N to below 10^-16 , roughly 4 orders of magnitude better than the current limit.

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“…is especially interesting research both from an experimental [l]- [3] and theo retical [4]- [7] physics point of view. The importance of this process is due to the fact that its observation would signal a breakdown of the separate lepton number conservation for electrons and muons.…”

Section: Introductionmentioning

confidence: 99%

“…In previous works [7,8] the renormalized quasiparticle random phase approx imation (RQRPA) appropriate for the μ -e conversion has been formulated. The influence of the renormalized quasi-boson approximation, on which the RQRPA relies, to the coherent matrix elements was also studied [7]. As has been shown, the improved quasi-boson approximation takes reliably into ac count the nucleon-nucleon ground state correlations which are important in evaluating accurately the sensitive (μ~,ε~) rates.…”

Section: Introductionmentioning

confidence: 99%

Study of the exotic μ-e conversion in nuclei using RQRPA

Ren¹,

Faessler²,

Kosmas³

2020

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The neutrinoless muon-to-electron conversion in nuclei is studied by using the renormalized quasiparticle random-phase approximation (RQRPA). This generalization of RPA is more reliable for the extremely small (μ-,e-) transition matrix elements than the ordinary QRPA because it restores the Pauli principle to a large extent. We apply the method to a set of nuclei throughout the periodic table, but we specifically investigate the 48Ti and 208Pb nuclei which are currently used as stopping targets at the PSI μ-e conversion experiments with the SINDRUM II spectrometer.

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Cited by 6 publications

References 4 publications

The exotic μ~ —» e~ conversion in Nuclei: An Interplay of Atomic, Nuclear and Particle Physics.

The exotic μ~ —» e~ conversion in Nuclei: An Interplay of Atomic, Nuclear and Particle Physics.

Improved tests of muon and electron flavor symmetry in muon processes

Study of the exotic μ-e conversion in nuclei using RQRPA

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