scholarly journals Probing new physics in charm couplings with flavor-changing neutral currents

2009 ◽  
Vol 80 (3) ◽  
Author(s):  
Xiao-Gang He ◽  
Jusak Tandean ◽  
G. Valencia
Keyword(s):  
New Physics ◽  
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 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.

SEARCHES FOR EXOTIC PARTICLES IN e+ e- COLLISIONS WITH THE DELPHI DETECTOR

2001 ◽  
Vol 16 (supp01b) ◽  
pp. 869-872
Author(s):  
◽  
BERNARDO TOMÉ
Keyword(s):  
Parameter Space ◽  
New Physics ◽  
Delphi Collaboration ◽  
Neutral Currents ◽  
Exotic Particles ◽  
Flavor Changing ◽  
Delphi Detector ◽  
Flavor Changing Neutral Currents

Results of searches for exotic particles by the DELPHI collaboration at CERN are prented. Highlights from the searches for Flavor Changing Neutral Currents, Technicolor, Fermiophobic Higgs and Compositeness, in the LEP 2 data are shown. No evidence for new physics was found and the excluded regions of the parameter space for each model are presented.

scholarly journals Two Higgs pair heterotic vacua and flavor-changing neutral currents

2008 ◽  
Vol 2008 (10) ◽  
pp. 046-046 ◽  
Author(s):  
Michael Ambroso ◽  
Volker Braun ◽  
Burt A Ovrut
Keyword(s):  
Neutral Currents ◽  
Flavor Changing ◽  
Flavor Changing Neutral Currents

scholarly journals Direct probes of flavor-changing neutral currents in e + e −-collisions

2015 ◽  
Vol 2015 (11) ◽  
Author(s):  
Alexander Khodjamirian ◽  
Thomas Mannel ◽  
Alexey A. Petrov
Keyword(s):  
Neutral Currents ◽  
Flavor Changing ◽  
Flavor Changing Neutral Currents

scholarly journals Search for flavor changing neutral currents in top quark decays in pp collisions at 7 TeV

2013 ◽  
Vol 718 (4-5) ◽  
pp. 1252-1272 ◽  
Author(s):  
S. Chatrchyan ◽  
V. Khachatryan ◽  
A.M. Sirunyan ◽  
A. Tumasyan ◽  
W. Adam ◽  
...  
Keyword(s):  
Top Quark ◽  
Neutral Currents ◽  
Pp Collisions ◽  
Flavor Changing ◽  
Quark Decays ◽  
Flavor Changing Neutral Currents
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