Oscillation dynamics of active-unsterile neutrino mixing in a<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mn>2</mml:mn><mml:mo>+</mml:mo><mml:mover accent="true"><mml:mn>1</mml:mn><mml:mo>˜</mml:mo></mml:mover></mml:math>mixing scheme

Boyanovsky, D.; Holman, R.; Hutasoit, Jimmy A.

doi:10.1103/physrevd.81.033009

Cited by 5 publications

(4 citation statements)

References 81 publications

(92 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This basis, however, does not diagonalize the mass term of the propagator and attempting to diagonalize the latter either via a unitary or a bi-unitary transformation will lead to an off diagonal matrix multiplying the kinetic term. A similar situation has been found in different contexts [75][76][77].…”

Section: Ii)supporting

confidence: 86%

Charged lepton mixing via heavy sterile neutrinos

Lello

Boyanovsky

2014

Nuclear Physics B

View full text Add to dashboard Cite

Pseudoscalar meson decay leads to an entangled state of charged leptons ($\mu,e$) and massive neutrinos. Tracing out the neutrino degrees of freedom leads to a reduced density matrix for the charged leptons whose off-diagonal elements reveal \emph{charged lepton oscillations}. Although these decohere on unobservably small time scales $ \lesssim 10^{-23} s $ they indicate charged lepton \emph{mixing} as a result of common intermediate states. The charged lepton self energy up to one loop features flavor off-diagonal terms responsible for charged lepton mixing: a dominant ``short distance'' contribution with $W$ bosons and massive neutrinos in the intermediate state, and a subdominant ``large distance'' contribution with pseudoscalar mesons and massive neutrinos in the intermediate state. Mixing angle(s) are GIM suppressed, and are \emph{momentum and chirality dependent}. The difference of negative chirality mixing angles near the muon and electron mass shells is $\theta_L(M^2_\mu) -\theta_L(M^2_e)\propto G_F \sum U_{\mu j} m^2_j U^*_{j e}$ with $m_j$ the mass of the neutrino in the intermediate state. Recent results from TRIUMF, suggest an upper bound $\theta_L(p^2\simeq M^2_\mu)-\theta_L(p^2 \simeq M^2_e) < 10^{-14}\,\Big(M_S/\mathrm{100}\,MeV\Big)^2$ for one generation of a heavy sterile neutrino with mass $M_S$. We obtain the wavefunctions for the propagating modes, and discuss the relation between the lepton flavor violating process $\mu \rightarrow e\gamma$ and charged lepton mixing, highlighting that a measurement of such process implies a mixed propagator $\mu, e$. Furthermore writing flavor diagonal vertices in terms of mass eigenstates yields novel interactions suggesting further contributions to lepton flavor violating process as a consequence of momentum and chirality dependent mixing angles.Comment: 26 pages, 5 fig

show abstract

Section: Ii)supporting

confidence: 86%

Charged lepton mixing via heavy sterile neutrinos

Lello

Boyanovsky

2014

Nuclear Physics B

View full text Add to dashboard Cite

show abstract

“…We can also add another active neutrino into the mix, which results in the so-called 2+1 model [8], and study the dynamics of the active-active neutrino oscillations. The complications that come from the momentum-dependent mixing angles and non-trivial spectral densities render a full quantum field theoretical treatment of this model necessary.…”

Section: Discussionmentioning

confidence: 99%

Unsterile-Active Neutrino Mixing

Hutasoit¹

2013

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

We consider a sterile neutrino to be an unparticle, namely an "unsterile" neutrino, and study its mixing with a canonical active neutrino via a see-saw mass matrix. There is no unitary transformation that diagonalizes the mixed propagator and a field redefinition is required. The unsterile-like propagating mode features a resonance for anomalous dimension between 0 and 1/3, but the complex pole disappears when the anomalous dimension is larger than 1/3. The active-like propagating mode is described by a stable pole, but inherits a nonvanishing spectral density above the unparticle threshold. We also find that the radiative decay width of the unsterile neutrino into the active neutrino (and a photon) via charged current loops is suppressed, and this suppression weakens the bound from the X-ray or soft gamma-ray background when one considers the unsterile neutrino to be a dark matter candidate.

show abstract

“…Unparticle is a subjective theory that Georgi introduced in 2007 [8]. In addition to the experimental searches [9][10][11][12], unparticle physics is widely considered in various topics of high energy physics, such as in cosmology [13][14][15], astronomy [16][17][18], neutrino oscillation [19] and even in solid state and atomic physics [20][21][22][23][24][25][26] etc. In particular, it is involved in the study of various decays and scatterings, beyond the SM [27][28][29][30][31][32][33][34].…”

Section: Introductionmentioning

confidence: 99%

Constraining unparticle physics with CP violation in Cabibbo-favored decays of D mesons

Ettefaghi¹,

Moazzemi

Rousta

2017

Phys. Rev. D

View full text Add to dashboard Cite

According to the standard model, the Cabibbo-favored (CF) decays are CP conserve at tree level. Observation of any finite CP asymmetry can be received as a signal of new physics. In CF charm meson decays, D 0 → K − π + and D + → K 0 s π + , the following experimental values for their CP asymmetry are reported, respectively: (0.3 ± 0.7) % and (−0.41 ± 0.09) %. The value of the later can be attributed to the mixing of K 0 and K 0 , however, its contribution is about (−0.332 ± 0.006) %. In this paper, we use these experimental results to constrain the unparticle stuff as a new physics which may contribute to these CP asymmetries.

show abstract

Oscillation dynamics of active-unsterile neutrino mixing in a2+1˜mixing scheme

Cited by 5 publications

References 81 publications

Charged lepton mixing via heavy sterile neutrinos

Charged lepton mixing via heavy sterile neutrinos

Unsterile-Active Neutrino Mixing

Constraining unparticle physics with CP violation in Cabibbo-favored decays of D mesons

Contact Info

Product

Resources

About