scholarly journals A search for flavour changing neutral currents in top-quark decays in pp collision data collected with the ATLAS detector at $ \sqrt{s}=7\;TeV $

2012 ◽  
Vol 2012 (9) ◽  
Author(s):  
G. Aad ◽  
◽  
B. Abbott ◽  
J. Abdallah ◽  
S. Abdel Khalek ◽  
...  
Keyword(s):  
Top Quark ◽  
Atlas Detector ◽  
Flavour Changing Neutral Currents ◽  
Neutral Currents ◽  
Quark Decays

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

Μελέτη των διασπάσεων αλλαγής γεύσης ουδετέρου ρεύματος του top κουάρκ στα πλαίσια του πειράματος CMS/LHC

2007 ◽  
Author(s):  
Γρηγόριος Βερμίσογλου
Keyword(s):  
Standard Model ◽  
Top Quark ◽  
Z Boson ◽  
New Physics ◽  
Flavour Changing Neutral Currents ◽  
Neutral Currents ◽  
Leptonic Decays ◽  
Quark Sector ◽  
Systematic Effects ◽  
Detector Simulation

This study contains the first realistic estimate for the CMS/LHC sensitivity to Flavour Changing Neutral Currents (FCNC) in the top quark sector. The non-Standard Model decays t→Zq and t→ γ q (where q = u, c) have been studied at √s = 14 TeV exploiting the leptonic decays of the Z⁰ boson and the photon. A realistic detector simulation has been used and the most important systematic effects have been addressed. The 5-sigma discovery limits for the two decays are BR(t→qZ)= 11.4 x 10⁻⁴ and BR(t→ γ q)= 5.7 x 10⁻⁴, allowing some models of new physics to be tested.

scholarly journals Measurement of the W boson polarization in top quark decays with the ATLAS detector

2012 ◽  
Vol 2012 (6) ◽  
Author(s):  
G. Aad ◽  
◽  
B. Abbott ◽  
J. Abdallah ◽  
S. Abdel Khalek ◽  
...  
Keyword(s):  
Top Quark ◽  
W Boson ◽  
Atlas Detector ◽  
Quark Decays
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