scholarly journals Lepton masses, mixings, and flavor-changing neutral currents in a minimalS3-invariant extension of the standard model

2007 ◽  
Vol 76 (7) ◽  
Author(s):  
A. Mondragón ◽  
M. Mondragón ◽  
E. Peinado
Keyword(s):  
Standard Model ◽  
Neutral Currents ◽  
Invariant Extension ◽  
Flavor Changing ◽  
The Standard Model ◽  
Flavor Changing Neutral Currents

scholarly journals EFFECT OF BOTH Z AND Z′ MEDIATED FLAVOR-CHANGING NEUTRAL CURRENTS ON THE BARYONIC RARE DECAY Λb→Λℓ+ℓ-

2009 ◽  
Vol 24 (32) ◽  
pp. 6223-6235 ◽  
Author(s):  
S. SAHOO ◽  
C. K. DAS ◽  
L. MAHARANA
Keyword(s):  
Standard Model ◽  
Z Boson ◽  
Rare Decay ◽  
Branching Ratio ◽  
New Physics ◽  
Beyond The Standard Model ◽  
Neutral Currents ◽  
Flavor Changing ◽  
The Standard Model ◽  
Flavor Changing Neutral Currents

We study the effect of both Z and Z′ mediated flavor-changing neutral currents (FCNCs) on the Λb→Λℓ+ℓ-(ℓ = μ, τ) rare decay. We find the branching ratio is reasonably enhanced from its Standard Model value due to the effect of both Z and Z′ mediated FCNCs, and gives the possibility of new physics beyond the Standard Model. The contribution of Z′ boson depends upon the precise value of MZ′.

scholarly journals THE PREDICTION OF MASS OF Z′-BOSON FROM $B_q^0\hbox{--}\overline{B_q^0}$ MIXING

2011 ◽  
Vol 26 (20) ◽  
pp. 3347-3356 ◽  
Author(s):  
S. SAHOO ◽  
C. K. DAS ◽  
L. MAHARANA
Keyword(s):  
Standard Model ◽  
Z Boson ◽  
New Physics ◽  
Beyond The Standard Model ◽  
Neutral Currents ◽  
Flavor Changing ◽  
The Standard Model ◽  
Near Future ◽  
Flavor Changing Neutral Currents

[Formula: see text] mixing offers a profound probe into the effects of new physics beyond the Standard Model. In this paper, [Formula: see text] and [Formula: see text] mass differences are considered taking the effect of both Z- and Z′-mediated flavor-changing neutral currents in the [Formula: see text] mixing (q = d, s). Our estimated mass of Z′ boson is accessible at the experiments LHC and B-factories in near future.

scholarly journals ON FERMION MASSES AND MIXING IN A MODEL WITH A4 SYMMETRY

2012 ◽  
Vol 27 (12) ◽  
pp. 1250068 ◽  
Author(s):  
A. C. B. MACHADO ◽  
J. C. MONTERO ◽  
V. PLEITEZ
Keyword(s):  
Standard Model ◽  
Discrete Symmetries ◽  
Neutral Currents ◽  
Flavor Changing ◽  
Neutral Scalar ◽  
Fermion Masses ◽  
The Standard Model ◽  
Scalar Sector ◽  
Flavor Changing Neutral Currents

In a recently proposed multi-Higgs extension of the standard model in which discrete symmetries, A4 and Z3 are imposed we show that, after accommodating the fermion masses and the mixing matrices in the charged currents, the mixing matrices in the neutral currents induced by neutral scalars are numerically obtained. However, the flavor changing neutral currents are under control mainly by mixing and/or mass suppressions in the neutral scalar sector.

scholarly journals Flavor-changing neutral currents in the dualized standard model

1999 ◽  
Vol 60 (1) ◽  
Author(s):  
José Bordes ◽  
Chan Hong-Mo ◽  
Jacqueline Faridani ◽  
Jakov Pfaudler ◽  
Tsou Sheung Tsun
Keyword(s):  
Standard Model ◽  
Neutral Currents ◽  
Flavor Changing ◽  
Flavor Changing Neutral Currents

scholarly journals EFFECT OF BOTH Z AND Z′-MEDIATED FLAVOR-CHANGING NEUTRAL CURRENTS ON Bs →τ+τ- DECAY

2012 ◽  
Vol 27 (31) ◽  
pp. 1250184 ◽  
Author(s):  
S. SAHOO ◽  
D. BANERJEE ◽  
M. KUMAR ◽  
S. MOHANTY
Keyword(s):  
Cp Violation ◽  
Standard Model ◽  
Rare Decay ◽  
Charge Asymmetry ◽  
Branching Ratio ◽  
New Physics ◽  
Neutral Currents ◽  
Flavor Changing ◽  
Potential Source ◽  
Flavor Changing Neutral Currents

In recent years, Bs →τ+τ- rare decay has attracted a lot of attention since it is very sensitive to the structure of standard model (SM) and potential source of new physics beyond SM. In this paper, we study the effect of both Z and Z′-mediated flavor-changing neutral currents on the Bs →τ+τ- decay. We find the branching ratio B(Bs→τ+τ-) is enhanced relative to SM prediction, which would help to explain the recently observed CP-violation from like-sign dimuon charge asymmetry in the B system.

scholarly journals Flavor changing neutral currents in the Lee–Wick Standard Model

2008 ◽  
Vol 658 (5) ◽  
pp. 230-235 ◽  
Author(s):  
Timothy R. Dulaney ◽  
Mark B. Wise
Keyword(s):  
Standard Model ◽  
Neutral Currents ◽  
Flavor Changing ◽  
Flavor Changing Neutral Currents

Charm Physics

2009 ◽  
Vol 24 (supp01) ◽  
pp. 499-502 ◽  
Author(s):  
D. M. Asner ◽  
I. I. Bigi ◽  
J. Charles ◽  
J. C. Chen ◽  
H. Y. Cheng ◽  
...  
Keyword(s):  
Standard Model ◽  
Quantum Number ◽  
Degrees Of Freedom ◽  
D Mesons ◽  
Low Frequency ◽  
Charm Physics ◽  
Neutral Currents ◽  
Long Distance ◽  
Flavor Changing ◽  
The Standard Model

Nobody doubts that the discovery of hadrons with charm of the hidden and open variety – i.e. charmonium as well as D mesons – was instrumental in the acceptance of the Standard Model (SM) in general, and of quarks as physical degrees of freedom, rather than objects of mere mathematical convenience, in particular. Yet charm is all too often viewed as a quantum number with a great past and with no particularly interesting future. This is due to SM predictions of a rather dull electroweak phenomenology of CKM parameters, a low frequency for [Formula: see text] oscillations, tiny (at best) CP asymmetries, and extremely rare flavor changing neutral currents which, in any case, are swamped by huge backgrounds from long-distance dynamics…

scholarly journals QCD corrections to flavor-changing neutral currents in the supersymmetric standard model

1997 ◽  
Vol 412 (1-2) ◽  
pp. 77-85 ◽  
Author(s):  
Jonathan A. Bagger ◽  
Konstantin T. Matchev ◽  
Ren-Jie Zhang
Keyword(s):  
Standard Model ◽  
Supersymmetric Standard Model ◽  
Neutral Currents ◽  
Flavor Changing ◽  
Flavor Changing Neutral Currents

CP ASYMMETRIES IN B0DECAYS BEYOND THE STANDARD MODEL

1991 ◽  
Vol 06 (08) ◽  
pp. 1253-1266 ◽  
Author(s):  
CLAUDIO O. DIB ◽  
DAVID LONDON ◽  
YOSEF NIR
Keyword(s):  
Standard Model ◽  
New Physics ◽  
The Other ◽  
Beyond The Standard Model ◽  
Neutral Currents ◽  
Flavor Changing ◽  
The Standard Model ◽  
Model Predictions ◽  
The Many ◽  
Cp Asymmetries

Of the many ingredients of the Standard Model that are relevant to the analysis of CP asymmetries in B0 decays, some are likely to hold even beyond the Standard Model while others are sensitive to new physics. Consequently, certain predictions are maintained while others may show dramatic deviations from the Standard Model. Many classes of models may show clear signatures when the asymmetries are measured: four quark generations, Z-mediated flavor-changing neutral currents, supersymmetry and “real superweak” models. On the other hand, models of left-right symmetry and multi-Higgs sectors with natural flavor conservation are unlikely to modify the Standard Model predictions.

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