Non-unitarity or hidden observables?

Emelyanov, Slava

doi:10.48550/arxiv.1410.6149

Cited by 2 publications

(2 citation statements)

References 22 publications

(51 reference statements)

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“…The non-conformally flat case is also an important issue [36,51]. The method established in the present paper can also be applied to such cases, which will be discussed further later.…”

Section: Discussionmentioning

confidence: 93%

Thermo field dynamics approach for entropy of spacetime

Chen,

Li,

Dai

2015

Preprint

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A thermo field dynamics approach for calculating the entropy of a spacetime is suggested. It is exemplified through the Rindler spacetime, the Milne spacetime, the Boulware spacetime, and the Minkowski spacetime with a moving mirror that the entropy of a spacetime is equal to the entropy of a thermo quantum field with the same temperature of the spacetime we study. This in fact suggests an thermo field dynamics approach of calculating the entropy of a spacetime. In this approach, the entropy of a spacetime is an expectation value of the entropy operator on a thermo vacuum state. The thermo vacuum state is the vacuum state on the maximal manifold which is the maximal analytic extension of the spacetime we study.

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“…The non-conformally flat case is also an important issue [36,51]. The method established in the present paper can also be applied to such cases, which will be discussed further later.…”

Section: Discussionmentioning

confidence: 93%

Thermo field dynamics approach for entropy of spacetime

Chen,

Li,

Dai

2015

Preprint

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“…The various aspects of non-unitary lepton mixing are extensively discussed in the literature in both phenomenological and theoretical perspectives [30][31][32][33][34][35][36][37][38][39][40]. In [41], it has been shown that the neutrino factory experiment can provide an excellent probe for non-unitarity effects which are emerging in the minimal inverse seesaw model.…”

Section: Introductionmentioning

confidence: 99%

Non-unitary lepton mixing in an inverse seesaw and its impact on the physics potential of long-baseline experiments

Soumya

Mohanta

2018

J. Phys. G: Nucl. Part. Phys.

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In this paper, we consider the low energy scale inverse seesaw mechanism in which the observed neutrino mass and lepton mixing are explained by introducing right-handed neutrinos and the gauge-singlet fermions with experimentally testable energy scale. Moreover, the presence of such new fermions leads to unitarity violation in lepton mixing due to significantly large mixing between active neutrinos and the heavy fermions. In addition to this, such large lepton mixing also gives rise to potentially large lepton flavor violation, which allows one to constrain the non-unitarity parameters via lepton flavor violating decays (l i → l j γ). We make use of these constraints on non-unitarity parameters and investigate their effects on the determination of current unknown oscillation parameters at long-baseline experiments. We find that non-unitarity parameters are sensitive to the NOνA experiment. However, it is observed that the NOνA experiment is not expected to improve the current knowledge of non-unitarity parameter η 21 . We also find that the sensitivities to current unknowns are deteriorated significantly in the presence of non-unitary lepton mixing and these sensitivities crucially depend upon the new CP-violating phase in the non-unitary mixing. Further, we find that the degeneracy resolution capability of the NOνA experiment is reduced in the presence of non-unitarity parameters. However, the synergy between the currently running experiments T2K and NOνA can improve the parameter degeneracy resolution and hence there is enhancement in the sensitivities of unknowns.

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Non-unitarity or hidden observables?

Cited by 2 publications

References 22 publications

Thermo field dynamics approach for entropy of spacetime

Thermo field dynamics approach for entropy of spacetime

Non-unitary lepton mixing in an inverse seesaw and its impact on the physics potential of long-baseline experiments

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