Naturalness versus stringy naturalness with implications for collider and dark matter searches
Abstract
The notion of stringy naturalness-- that an observable $O$2 is more natural than $O$12 if more (phenomenologically acceptable) vacua solutions lead to $O$2 rather than $O$1-- is examined within the context of the Standard Model (SM) and various SUSY extensions: CMSSM/mSUGRA, high-scale SUSY and radiatively-driven natural SUSY (RNS). Rather general arguments from string theory suggest a (possibly mild) statistical draw towards vacua with large soft SUSY breaking terms. These vacua must be tempered by an anthropic veto of non-standard vacua or vacua with too large a value of the weak scale mweak. We argue that the SM, the CMSSM and the various high-scale SUSY models are all expected to be relatively rare occurances within the string theory landscape of vacua. In contrast, models with TeV-scale soft terms but with mweak~100 GeV and consequent light higgsinos (SUSY with radiatively-driven naturalness) should be much more common on the landscape. These latter models have a statistical preference for mh~ 125 GeV and strongly interacting sparticles beyond current LHC reach. Thus, while conventional naturalness favors sparticles close to the weak scale, stringy naturalness favors sparticles so heavy that electroweak symmetry is barely broken and one is living dangerously close to vacua with charge-or-color breakingmore »
- Authors:
- Publication Date:
- Research Org.:
- Univ. of Oklahoma, Norman, OK (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- OSTI Identifier:
- 1560296
- Alternate Identifier(s):
- OSTI ID: 1600542
- Report Number(s):
- arXiv:1906.07741
Journal ID: ISSN 2643-1564; PPRHAI; 023001
- Grant/Contract Number:
- SC0009956
- Resource Type:
- Published Article
- Journal Name:
- Physical Review Research
- Additional Journal Information:
- Journal Name: Physical Review Research Journal Volume: 1 Journal Issue: 2; Journal ID: ISSN 2643-1564
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; supersymmetry; string theory; LHC
Citation Formats
Baer, Howard, Barger, Vernon, and Salam, Shadman. Naturalness versus stringy naturalness with implications for collider and dark matter searches. United States: N. p., 2019.
Web. doi:10.1103/PhysRevResearch.1.023001.
Baer, Howard, Barger, Vernon, & Salam, Shadman. Naturalness versus stringy naturalness with implications for collider and dark matter searches. United States. https://doi.org/10.1103/PhysRevResearch.1.023001
Baer, Howard, Barger, Vernon, and Salam, Shadman. Tue .
"Naturalness versus stringy naturalness with implications for collider and dark matter searches". United States. https://doi.org/10.1103/PhysRevResearch.1.023001.
@article{osti_1560296,
title = {Naturalness versus stringy naturalness with implications for collider and dark matter searches},
author = {Baer, Howard and Barger, Vernon and Salam, Shadman},
abstractNote = {The notion of stringy naturalness-- that an observable $O$2 is more natural than $O$12 if more (phenomenologically acceptable) vacua solutions lead to $O$2 rather than $O$1-- is examined within the context of the Standard Model (SM) and various SUSY extensions: CMSSM/mSUGRA, high-scale SUSY and radiatively-driven natural SUSY (RNS). Rather general arguments from string theory suggest a (possibly mild) statistical draw towards vacua with large soft SUSY breaking terms. These vacua must be tempered by an anthropic veto of non-standard vacua or vacua with too large a value of the weak scale mweak. We argue that the SM, the CMSSM and the various high-scale SUSY models are all expected to be relatively rare occurances within the string theory landscape of vacua. In contrast, models with TeV-scale soft terms but with mweak~100 GeV and consequent light higgsinos (SUSY with radiatively-driven naturalness) should be much more common on the landscape. These latter models have a statistical preference for mh~ 125 GeV and strongly interacting sparticles beyond current LHC reach. Thus, while conventional naturalness favors sparticles close to the weak scale, stringy naturalness favors sparticles so heavy that electroweak symmetry is barely broken and one is living dangerously close to vacua with charge-or-color breaking minima, no electroweak breaking or pocket universe weak scale values too far from our measured value. Expectations for how landscape SUSY would manifest itself at collider and dark matter search experiments are then modified compared to usual notions.},
doi = {10.1103/PhysRevResearch.1.023001},
journal = {Physical Review Research},
number = 2,
volume = 1,
place = {United States},
year = {2019},
month = {9}
}
https://doi.org/10.1103/PhysRevResearch.1.023001
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