Signals with six bottom quarks for charged and neutral Higgs bosons
- PDF / 2,383,656 Bytes
- 22 Pages / 595.276 x 841.89 pts (A4) Page_size
- 100 Downloads / 261 Views
Springer
Received: May 27, 2020 Accepted: July 2, 2020 Published: July 31, 2020
Radovan Dermisek,a Enrico Lunghi,a Navin McGinnisa,b and Seodong Shinc a
Physics Department, Indiana University, 727 E. Third St., Bloomington, IN 47405, U.S.A. b High Energy Physics Division, Argonne National Laboratory, 9700 S. Cass Avenue, Lemont, IL 60439, U.S.A. c Department of Physics, Jeonbuk National University, Baekje-daero 567, Jeonju, Jeonbuk 54896, Korea
E-mail: [email protected], [email protected], [email protected], [email protected] Abstract: In extensions of two Higgs doublet models with vectorlike quarks, the decays of vectorlike quarks may easily be dominated by cascade decays through charged or neutral Higgs bosons leading to signatures with 6 top or bottom quarks. Since top quark decays also contain bottom quarks, a common signature for many possible decay chains is 6 bottom quarks in the final state. We present a search strategy focusing on this final state and find the mass ranges of vectorlike quarks and Higgs bosons that can be explored at the Large Hadron Collider. Among other results, the sensitivity to the charged and neutral Higgs bosons, extending to about 2 TeV, stands out when compared to models without vectorlike matter. Keywords: Beyond Standard Model, Higgs Physics ArXiv ePrint: 2005.07222
c The Authors. Open Access, Article funded by SCOAP3 .
https://doi.org/10.1007/JHEP07(2020)241
JHEP07(2020)241
Signals with six bottom quarks for charged and neutral Higgs bosons
Contents 1 Introduction
1
2 Decays of vectorlike quarks through heavy Higgs bosons
3 5 9 14 14
4 Conclusions
17
A 1b/2b jet discrimination
18
B Poisson statistics
19
1
Introduction
Among the simplest extensions of the standard model (SM) is the two Higgs doublet model (2HDM) featuring two neutral Higgs bosons, the CP-even, H, and the CP-odd, A, (if CP is conserved) and a pair of charged Higgs bosons, H ± , in addition to the neutral CP-even Higgs boson, h, which is experimentally constrained to have properties very close to the SM Higgs boson. However, the typically dominant decay modes of the additional Higgs bosons, tt¯, b¯b, t¯b and t¯b, in the type-II 2HDM are very challenging at the Large Hadron Collider (LHC) due to huge QCD backgrounds. For example, the limits on H + → t¯b currently exist only for small and large tan β (the ratio of vacuum expectation values of two Higgs doublets, that set the Yukawa couplings of Higgs bosons) and the LHC is not yet sensitive to this decay in most of the range, 2 . tan β . 35 [1, 2]. Although the limits will certainly improve with larger data sets, even with 3 ab−1 of integrated luminosity it is not expected that the LHC would constrain the charged Higgs boson significantly in this range. 1 In extensions of two Higgs doublet models with vectorlike quarks, the decays of vectorlike quarks may easily be dominated by cascade decays through charged or neutral Higgs bosons leading to signatures with 6 top or bottom quarks [8], see figure 1. The heavy Higgs bosons are effectively
Data Loading...
