Depolarization of Negative Muons and Interaction of Mesonic Atoms With the Medium

Evseev, V.S.

doi:10.1016/b978-0-12-360603-7.50009-4

Cited by 12 publications

(4 citation statements)

References 47 publications

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“…However, even if negative muons in the beam are 100% spin polarized, they are depolarized during their atomic cascades down to the 1s ground state. For a nucleus with zero nuclear spin, the residual polarization is about 16% (Evseev, 1975). For a nucleus with non-zero nuclear spin, it becomes much smaller.…”

Section: Event Signature and Backgroundsmentioning

confidence: 94%

Muon decay and physics beyond the standard model

2001

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This article reviews the current theoretical and experimental status of the field of muon decay and its potential to search for new physics beyond the Standard Model. The importance of rare muon processes with lepton flavor violation is highly stressed, together with precision measurements of normal muon decay. Recent up-to-date motivations of lepton flavor violation based on supersymmetric models, in particular supersymmetric grand unified theories, are described along with other theoretical models. Future prospects of experiments and muon sources of high intensity for further progress in this field are also discussed.

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Section: Event Signature and Backgroundsmentioning

confidence: 94%

Muon decay and physics beyond the standard model

2001

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“…In order to reconcile theory with experiment on muonic Auger effect, de Borde proposed that the intial atomic capture takes place predominantly into states of low angular momentum. Many problems are related to the initial population as, for instance, in the case of muons, the residual polarization after the atomic deexcitation [6]; in this case, depending on the initial distribution over the angular momentum l, the captured muon will make dipole transitions towards lower l values (retaining its polarization) or towards higher l values (losing polarization) [7]. It is well known that, starting from the statistical distribution which gives the largest probability that the muon be captured into the l=n-1 state, one can establish the "1/6" law for the muon residual polarization [8,9].…”

Section: Introductionmentioning

confidence: 99%

Initial population of? ?,? ?,K ? after radiative atomic recombination

1981

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We calculate the radiative atomic recombination of # , ~r , K-with a nucleus. In the initial state the negative particle moves in a Coulomb field, in the continuous spectrum, with positive energy and is captured into the bound orbit (n, l) of negative energy. We consider the exotic atom as a hydrogenic atom. The analytical expression of the recombination cross section, together with a "low energy" approximation, is derived. We obtain information on the atomic initial population: the results presented here show that the Bohr statistical distribution, used in the case of neutral atoms, is not correct in this case.

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“…However, even if negative muons in the beam are 100 % polarized, they are depolarized during their atomic cascades down to the 1 s ground state. There is a small residual polarization, of about 15 % [36] in nuclei with zero spin, but is much smaller when nuclei carry spin. They must be re-polarized, and one way is to have a polarized nucleus target [37,38].…”

Section: Discussionmentioning

confidence: 96%

Probing leptonic CP phases in LFV processes

Bajc¹,

Nemevšek²,

Senjanović³

2010

Physics Letters B

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We study a CP and T violating triple (spin) correlation in the muon to electron conversion in nuclei in the context of the seesaw mechanism. After concluding that the results are negative for all three seesaw types, we turn to the left-right symmetric theories as the original source of seesaw. We find that in general this correlation is of order one which offers a hope of observing CP violation in lepton flavor violating processes for a L-R scale below around 10-30 TeV. We discuss the conditions that could render to (unlikely) conspiracies as to suppress the CP violating effects.Comment: 15 pages, 2 figure

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Depolarization of Negative Muons and Interaction of Mesonic Atoms With the Medium

Cited by 12 publications

References 47 publications

Muon decay and physics beyond the standard model

Muon decay and physics beyond the standard model

Initial population of? ?,? ?,K ? after radiative atomic recombination

Probing leptonic CP phases in LFV processes

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