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Department of Atomic Energy, Govt. of India
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Past Seminar

Title              :

Higgs data does not rule out a sequential fourth generation

Speaker         : Ipsita Saha, INFN, Rome
Date                : January 02, 2018
Time               : 3:30 PM
Venue            : Room 3307
Abstract        :

In this talk, I will try to explain a novel way of resurrecting the sequential fourth generation. Contrary to the common perception, I will explain how the current Higgs data does not eliminate the possibility of a sequential fourth generation that get their masses through the same Higgs mechanism as the first three generations. The inability to fix the sign of the bottom-quark Yukawa coupling from the available data plays a crucial role in accommodating a chiral fourth generation which is consistent with the bounds on the Higgs signal strengths. The effects of such a fourth generation can remain completely hidden not only in the production of the Higgs boson through gluon fusion but also to its subsequent decay to γγ and Zγ. I will also present a practical example illustrating how this general prescription can be embedded in a realistic model.

 

 

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