On Extra Neutral and Charged Higgs bosons at the LHC

TL;DR

This paper reviews the status of Higgs physics at the LHC, focusing on the potential discovery of additional neutral and charged Higgs bosons predicted by beyond Standard Model theories, and discusses recent detection strategies.

Contribution

It presents two recent studies: methods to detect charged Higgs bosons with top polarization data and strategies to discover extra neutral Higgs bosons through SM-like Higgs pair production.

Findings

Charged Higgs detection can be improved using top polarization.

Extra neutral Higgs bosons can be identified via SM-like Higgs pair production.

Current LHC data constrains but does not exclude extended Higgs sectors.

Abstract

The properties of 125 GeV new particle, which was discovered in 2012 at the Large Hadron Collider (LHC), are found to be consistent with those of the Higgs boson in the standard model (SM). Hereafter the new particle is dubbed as SM-like Higgs boson. However there is still spacious room for physics beyond the SM (BSM) due to the limited energy and luminosity of the LHC. With more data, experiments will scrutinize whether the new particle is indeed the SM one or not. At the same time, one believes that discovery of the SM-like Higgs boson is just the start of the new era of particle physics. The predominant topic is whether there are others new Higgs bosons as speculated in various BSM models. In this short review we willdescribe the current status of Higgs physics at the LHC and several BSM models which contain more Higgs sectors. In literature there are numerous studies on extended Higgs sector and a comprehensive review is beyond the scopeof this review. Instead, we will present two latest studies on Higgs physics: (1) how to detect the charged Higgs boson and measure $\tan\beta$ after including the top polarization information, and (2) how todiscover the extra neutral Higgs boson via the pair production of SM-like Higgs boson.