Speaker
YUN JIANG
(UC Davis)
Description
Besides the SM-like Higgs boson discovery, it is also important to assess all possibilities for other Higgs-like states that are built in the extended Higgs sector and may have escaped detection at Run 1 of the LHC. One often considered the limit is the decoupling limit in which one scalar Higgs is SM-like and others are very heavy. A SM-like scalar Higgs boson can however also be obtained in the alignment limit without the masses of other Higgs being large.
In this talk I address the seemingly extreme case in which the one scalar (h) is the SM-like 125 GeV state and a pesudoscalar (A) light enough that the SM-like state can decay into them. Identifying the precise region in which a sufficiently small hAA coupling occurs to escape the large Higgs invisible decay is my first goal. Following this challenging analysis, I will show that such light Higgs states are phenomenologically viable and can lead to interesting signatures. Part of the relevant parameter space is undergoing the tests with the existing LHC 8 TeV data. In addition, the contrast on the results achieved within the alignment limit and in the decoupling of heavier scalar states will be discussed.
Author
YUN JIANG
(UC Davis)
Co-authors
Jack Gunion
(University of California Davis (US))
Jeremy Bernon
(Laboratoire de Physique Subatomique et de Cosmologie (LPSC)-Uni)
Sabine Kraml
(LPSC Grenoble)