Title : |
Higgs data does not rule out a sequential fourth generation |
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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. |