The LHC higgsino discovery plane for present and future SUSY searches
Abstract
Considerations from electroweak naturalness and stringy naturalness imply a little hierarchy in supersymmetric models where the superpotential higgsino mass parameter μ is of order the weak scale whilst the soft SUSY breaking terms may be in the (multi-) TeV range. In such a case, discovery of SUSY at LHC may be most likely in the higgsino pair production channel. Indeed, ATLAS and CMS are performing searches in the higgsino mass discovery plane of m$$^{∼0}_{χ_2}$$ vs. m0 ≡ m$$^{∼0}_{χ_2}$$ - m$$^{∼0}_{χ_1}$$. We examine several theoretical aspects of this discovery plane in both the gravity-mediation NUHM2 model and the general miragemediation (GMM') models. These include: the associated chargino mass m$$^{∼±}_{χ_1}$$, the expected regions of the bottom-up notion of electroweak naturalness EW , and the expected regions of stringy naturalness. While compatibility with electroweak naturalness allows for mass gaps m0 ~ 4-20 GeV, stringy naturalness exhibits a clear preference for yet smaller mass gaps of 4-10 GeV. For still smaller mass gaps, the plane becomes sharply unnatural since very large gaugino masses are required. This study informs the most promising SUSY search channels and parameter space regions for the upcoming HL-LHC runs and possible HE-LHC option.
- Publication Date:
- Research Org.:
- Univ. of Oklahoma, Norman, OK (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- OSTI Identifier:
- 1664477
- Alternate Identifier(s):
- OSTI ID: 1851223
- Grant/Contract Number:
- SC0009956
- Resource Type:
- Published Article
- Journal Name:
- Physics Letters B
- Additional Journal Information:
- Journal Name: Physics Letters B Journal Volume: 810 Journal Issue: C; Journal ID: ISSN 0370-2693
- Publisher:
- Elsevier
- Country of Publication:
- Netherlands
- Language:
- English
- Subject:
- 79 ASTRONOMY AND ASTROPHYSICS; Astronomy & Astrophysics; Physics
Citation Formats
Baer, Howard, Barger, Vernon, Salam, Shadman, Sengupta, Dibyashree, and Tata, Xerxes. The LHC higgsino discovery plane for present and future SUSY searches. Netherlands: N. p., 2020.
Web. doi:10.1016/j.physletb.2020.135777.
Baer, Howard, Barger, Vernon, Salam, Shadman, Sengupta, Dibyashree, & Tata, Xerxes. The LHC higgsino discovery plane for present and future SUSY searches. Netherlands. https://doi.org/10.1016/j.physletb.2020.135777
Baer, Howard, Barger, Vernon, Salam, Shadman, Sengupta, Dibyashree, and Tata, Xerxes. Sun .
"The LHC higgsino discovery plane for present and future SUSY searches". Netherlands. https://doi.org/10.1016/j.physletb.2020.135777.
@article{osti_1664477,
title = {The LHC higgsino discovery plane for present and future SUSY searches},
author = {Baer, Howard and Barger, Vernon and Salam, Shadman and Sengupta, Dibyashree and Tata, Xerxes},
abstractNote = {Considerations from electroweak naturalness and stringy naturalness imply a little hierarchy in supersymmetric models where the superpotential higgsino mass parameter μ is of order the weak scale whilst the soft SUSY breaking terms may be in the (multi-) TeV range. In such a case, discovery of SUSY at LHC may be most likely in the higgsino pair production channel. Indeed, ATLAS and CMS are performing searches in the higgsino mass discovery plane of m$^{∼0}_{χ_2}$ vs. m0 ≡ m$^{∼0}_{χ_2}$ - m$^{∼0}_{χ_1}$. We examine several theoretical aspects of this discovery plane in both the gravity-mediation NUHM2 model and the general miragemediation (GMM') models. These include: the associated chargino mass m$^{∼±}_{χ_1}$, the expected regions of the bottom-up notion of electroweak naturalness EW , and the expected regions of stringy naturalness. While compatibility with electroweak naturalness allows for mass gaps m0 ~ 4-20 GeV, stringy naturalness exhibits a clear preference for yet smaller mass gaps of 4-10 GeV. For still smaller mass gaps, the plane becomes sharply unnatural since very large gaugino masses are required. This study informs the most promising SUSY search channels and parameter space regions for the upcoming HL-LHC runs and possible HE-LHC option.},
doi = {10.1016/j.physletb.2020.135777},
journal = {Physics Letters B},
number = C,
volume = 810,
place = {Netherlands},
year = {Sun Nov 01 00:00:00 EDT 2020},
month = {Sun Nov 01 00:00:00 EDT 2020}
}
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