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 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.

THE EFFECT OF Z′-MEDIATED FLAVOR-CHANGING NEUTRAL CURRENT ON Bd→ℓ+ℓ- DECAY

2007 ◽  
Vol 22 (21) ◽  
pp. 1591-1599 ◽  
Author(s):  
S. SAHOO ◽  
L. MAHARANA
Keyword(s):  
Standard Model ◽  
Z Boson ◽  
Rare Decay ◽  
Neutral Current ◽  
Branching Ratio ◽  
New Physics ◽  
Flavor Changing ◽  
Flavor Changing Neutral Current

We study the effect of both Z and Z′-mediated flavor-changing neutral current (FCNC) on the Bd→ℓ+ℓ-, (ℓ = μ, τ) rare decay. We find that the branching ratio can be larger by order two from its Standard Model (SM) value due to the effect of both Z and Z′-mediated FCNC, though the major contribution comes from Z boson and provides signals for new physics beyond the SM.

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 Probing new physics with $B^0_s\to\mu^+\mu^-$: Status and perspectives

2014 ◽  
Vol 29 (21) ◽  
pp. 1444004 ◽  
Author(s):  
Robert Fleischer
Keyword(s):  
Standard Model ◽  
Decay Width ◽  
Rare Decay ◽  
Branching Ratio ◽  
New Physics ◽  
High Luminosity ◽  
Width Difference ◽  
Rate Asymmetry ◽  
The Standard Model ◽  
Meson System

The rare decay [Formula: see text] plays a key role for the testing of the Standard Model. It is pointed out that the sizable decay width difference ΔΓsof the Bs-meson system affects this channel in a subtle way. As a consequence, its calculated Standard Model branching ratio has to be upscaled by about 10%. Moreover, the sizable ΔΓsmakes a new observable through the effective [Formula: see text] lifetime accessible, which probes New Physics in a way complementary to the branching ratio and adds an exciting new topic to the agenda for the high-luminosity upgrade of the LHC. Further probes of New Physics are offered by a CP-violating rate asymmetry. Correlations between these observables and the [Formula: see text] branching ratio are illustrated for specific models of New Physics.

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