ELECTROWEAK INTERACTIONS WITH DISTINCTLY GAUGED QUARK AND LEPTON HYPERCHARGES

1986 ◽  
Vol 01 (12) ◽  
pp. 645-652 ◽  
Author(s):  
S. RAJPOOT
Keyword(s):  
Gauge Symmetry ◽  
Charge Asymmetry ◽  
Electroweak Interactions ◽  
Neutral Currents

The possibility that quarks and leptons have distinct hypercharge sources in nature is considered. This requires the gauge symmetry of electroweak interactions to be extended from SU (2)× U (1) to SU (2)× U (1)× U (1). Consistent with data on neutrino neutral currents and the measurement of forward-backward charge asymmetry in e+e−→μ+μ−, a second neutral boson exists that has mass either below or above the mass of the presently discovered neutral boson.

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 ρ PARAMETER IN THE VECTOR CONDENSATE MODEL OF ELECTROWEAK INTERACTIONS

1994 ◽  
Vol 09 (18) ◽  
pp. 1701-1705 ◽  
Author(s):  
G. CYNOLTER ◽  
E. LENDVAI ◽  
G. POCSIK
Keyword(s):  
Gauge Symmetry ◽  
Standard Model ◽  
Vector Boson ◽  
Higgs Doublet ◽  
Electroweak Interactions ◽  
Gauge Bosons ◽  
Momentum Scale ◽  
The Standard Model ◽  
Vector Bosons

In the standard model of electroweak interactions the Higgs doublet is replaced by a doublet of vector bosons and the gauge symmetry is broken dynamically. This generates masses for the gauge bosons and fermions as well as it fixes the interactions in the model. The model has a low momentum scale. In this note we show that the model survives the test of the ρ parameter, and to each momentum scale ρ chooses a possible range of vector boson masses.

scholarly journals The Standard Model of Electroweak Interactions

2020 ◽  
pp. 35-81
Author(s):  
Guido Altarelli ◽  
Stefano Forte
Keyword(s):  
Gauge Symmetry ◽  
Standard Model ◽  
Matter Content ◽  
Higgs Particle ◽  
Electroweak Interactions ◽  
The Standard Model ◽  
Vector Bosons ◽  
Intermediate Vector

AbstractIn this chapter, we summarize the structure of the standard EW theory and specify the couplings of the intermediate vector bosons W±, Z and of the Higgs particle with the fermions and among themselves, as dictated by the gauge symmetry plus the observed matter content and the requirement of renormalizability

GSW model of electroweak interactions

2018 ◽  
Author(s):  
Michael Kachelriess
Keyword(s):  
Gauge Symmetry ◽  
Higgs Sector ◽  
Electroweak Interactions ◽  
Hierarchy Problem ◽  
Fermion Masses ◽  
Electroweak Sector ◽  
Higgs Effect

The electroweak sector of the SM described by an SUL(2)UY(1) gauge symmetry which is broken spontaneously to Uem(1) is introduced. The generation of boson and fermion masses by the Higgs effect is discussed. The properties of the Higgs sector are examined. The conditions for decoupling and the hierarchy problem are discussed.

V A Fock and gauge symmetry

2010 ◽  
Vol 180 (8) ◽  
pp. 871 ◽  
Author(s):  
Lev B. Okun
Keyword(s):  
Gauge Symmetry
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