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Title: The fate of long-lived superparticles with hadronic decays after LHC Run 1

Abstract

Supersymmetry searches at the LHC are both highly varied and highly constraining, but the vast majority are focused on cases where the final-stage visible decays are prompt. Scenarios featuring superparticles with detector-scale lifetimes have therefore remained a tantalizing possibility for sub-TeV SUSY, since explicit limits are relatively sparse. Nonetheless, the extremely low backgrounds of the few existing searches for collider-stable and displaced new particles facilitates recastings into powerful long-lived superparticle searches, even for models for which those searches are highly non-optimized. In this paper, we assess the status of such models in the context of baryonic R-parity violation, gauge mediation, and mini-split SUSY. We then explore a number of common simplified spectra where hadronic decays can be important, employing recasts of LHC searches that utilize different detector systems and final-state objects. The LSP/NLSP possibilities considered here include generic colored superparticles such as the gluino and light-flavor squarks, as well as the lighter stop and the quasi-degenerate Higgsino multiplet motivated by naturalness. We find that complementary coverage over large swaths of mass and lifetime is achievable by superimposing limits, particularly from CMS’s tracker-based displaced dijet search and heavy stable charged particle searches. By adding in prompt searches, we find many casesmore » where a range of sparticle masses is now excluded from zero lifetime to infinite lifetime with no gaps. In other cases, the displaced searches furnish the only extant limits at any lifetime.« less

Authors:
 [1];  [2]
  1. Univ. of Pittsburgh, Pittsburgh, PA (United States); Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
  2. Univ. of Pittsburgh, Pittsburgh, PA (United States)
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
OSTI Identifier:
1221282
Report Number(s):
FERMILAB-PUB-15-087-T; PITT-PACC-1503
Journal ID: ISSN 1029-8479; arXiv eprint number arXiv:1503.05923; TRN: US1500564
Grant/Contract Number:  
AC02-07CH11359
Resource Type:
Accepted Manuscript
Journal Name:
Journal of High Energy Physics (Online)
Additional Journal Information:
Journal Name: Journal of High Energy Physics (Online); Journal Volume: 2015; Journal Issue: 6; Journal ID: ISSN 1029-8479
Publisher:
Springer Berlin
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; supersymmetry phenomenology; Monte-Carlo simulations

Citation Formats

Liu, Zhen, and Tweedie, Brock. The fate of long-lived superparticles with hadronic decays after LHC Run 1. United States: N. p., 2015. Web. doi:10.1007/JHEP06(2015)042.
Liu, Zhen, & Tweedie, Brock. The fate of long-lived superparticles with hadronic decays after LHC Run 1. United States. doi:10.1007/JHEP06(2015)042.
Liu, Zhen, and Tweedie, Brock. Mon . "The fate of long-lived superparticles with hadronic decays after LHC Run 1". United States. doi:10.1007/JHEP06(2015)042. https://www.osti.gov/servlets/purl/1221282.
@article{osti_1221282,
title = {The fate of long-lived superparticles with hadronic decays after LHC Run 1},
author = {Liu, Zhen and Tweedie, Brock},
abstractNote = {Supersymmetry searches at the LHC are both highly varied and highly constraining, but the vast majority are focused on cases where the final-stage visible decays are prompt. Scenarios featuring superparticles with detector-scale lifetimes have therefore remained a tantalizing possibility for sub-TeV SUSY, since explicit limits are relatively sparse. Nonetheless, the extremely low backgrounds of the few existing searches for collider-stable and displaced new particles facilitates recastings into powerful long-lived superparticle searches, even for models for which those searches are highly non-optimized. In this paper, we assess the status of such models in the context of baryonic R-parity violation, gauge mediation, and mini-split SUSY. We then explore a number of common simplified spectra where hadronic decays can be important, employing recasts of LHC searches that utilize different detector systems and final-state objects. The LSP/NLSP possibilities considered here include generic colored superparticles such as the gluino and light-flavor squarks, as well as the lighter stop and the quasi-degenerate Higgsino multiplet motivated by naturalness. We find that complementary coverage over large swaths of mass and lifetime is achievable by superimposing limits, particularly from CMS’s tracker-based displaced dijet search and heavy stable charged particle searches. By adding in prompt searches, we find many cases where a range of sparticle masses is now excluded from zero lifetime to infinite lifetime with no gaps. In other cases, the displaced searches furnish the only extant limits at any lifetime.},
doi = {10.1007/JHEP06(2015)042},
journal = {Journal of High Energy Physics (Online)},
number = 6,
volume = 2015,
place = {United States},
year = {2015},
month = {6}
}

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Cited by: 27 works
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