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Title: Natural h{yields}4g in supersymmetric models and R-hadrons at the LHC

Abstract

We construct a simple and natural supersymmetric model where the dominant Higgs decay is h{yields}aa followed by a{yields}gg. In this case m{sub h}<m{sub Z} is compatible with all experimental searches, completely eliminating the fine-tuning otherwise required to satisfy Higgs search limits. The model extends the minimal supersymmetric standard model with singlet Higgs fields as well as vectorlike colored particles that mediate the decay a{yields}gg. The a is a pseudo-Nambu-Goldstone boson of a new global U(1) symmetry, and can naturally have any mass from a few GeV to m{sub h}/2. All interactions can be perturbative up to the GUT scale, and gauge coupling unification is preserved if the colored mediators come in complete GUT representations. In this case a{yields}{gamma}{gamma} has a {approx}1% branching ratio, so h{yields}gg{gamma}{gamma} may be observable. The colored particles that mediate the a{yields}gg decay must be below the TeV scale, and can therefore be produced at the LHC. If these particles are stable on collider time scales, they will appear as R-hadrons, a signal visible in early LHC running. A smoking-gun signal that the stable colored particles are mediators of h{yields}4j is R-hadron production in association with an a. We show that this signal with a{yields}{gamma}{gamma} is observablemore » at the LHC with as little as 10 fb{sup -1} of integrated luminosity. Observation of R-hadrons plus missing energy would show that the superpartner of the R-hadron is R-parity odd, and therefore not an ordinary quark or gluon.« less

Authors:
; ;  [1]
  1. Physics Department, University of California Davis, Davis, California 95616 (United States)
Publication Date:
OSTI Identifier:
21537751
Resource Type:
Journal Article
Journal Name:
Physical Review. D, Particles Fields
Additional Journal Information:
Journal Volume: 83; Journal Issue: 7; Other Information: DOI: 10.1103/PhysRevD.83.075015; (c) 2011 American Institute of Physics; Journal ID: ISSN 0556-2821
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; BRANCHING RATIO; CERN LHC; COUPLING; GEV RANGE; GLUONS; GOLDSTONE BOSONS; HADRONS; HIGGS BOSONS; HIGGS MODEL; INTERACTIONS; LUMINOSITY; MASS; PARITY; PARTICLE DECAY; PARTICLE PRODUCTION; QUARKS; SIMULATION; STANDARD MODEL; SUPERSYMMETRY; U-1 GROUPS; ACCELERATORS; BOSONS; CYCLIC ACCELERATORS; DECAY; DIMENSIONLESS NUMBERS; ELEMENTARY PARTICLES; ENERGY RANGE; FERMIONS; FIELD THEORIES; GRAND UNIFIED THEORY; LIE GROUPS; MATHEMATICAL MODELS; OPTICAL PROPERTIES; PARTICLE MODELS; PARTICLE PROPERTIES; PHYSICAL PROPERTIES; POSTULATED PARTICLES; QUANTUM FIELD THEORY; STORAGE RINGS; SYMMETRY; SYMMETRY GROUPS; SYNCHROTRONS; U GROUPS; UNIFIED GAUGE MODELS

Citation Formats

Luty, Markus A, Phalen, Daniel J, Pierce, Aaron, and Michigan Center for Theoretical Physics, Department of Physics, University of Michigan, Ann Arbor, Michigan 48109. Natural h{yields}4g in supersymmetric models and R-hadrons at the LHC. United States: N. p., 2011. Web. doi:10.1103/PHYSREVD.83.075015.
Luty, Markus A, Phalen, Daniel J, Pierce, Aaron, & Michigan Center for Theoretical Physics, Department of Physics, University of Michigan, Ann Arbor, Michigan 48109. Natural h{yields}4g in supersymmetric models and R-hadrons at the LHC. United States. https://doi.org/10.1103/PHYSREVD.83.075015
Luty, Markus A, Phalen, Daniel J, Pierce, Aaron, and Michigan Center for Theoretical Physics, Department of Physics, University of Michigan, Ann Arbor, Michigan 48109. Fri . "Natural h{yields}4g in supersymmetric models and R-hadrons at the LHC". United States. https://doi.org/10.1103/PHYSREVD.83.075015.
@article{osti_21537751,
title = {Natural h{yields}4g in supersymmetric models and R-hadrons at the LHC},
author = {Luty, Markus A and Phalen, Daniel J and Pierce, Aaron and Michigan Center for Theoretical Physics, Department of Physics, University of Michigan, Ann Arbor, Michigan 48109},
abstractNote = {We construct a simple and natural supersymmetric model where the dominant Higgs decay is h{yields}aa followed by a{yields}gg. In this case m{sub h}<m{sub Z} is compatible with all experimental searches, completely eliminating the fine-tuning otherwise required to satisfy Higgs search limits. The model extends the minimal supersymmetric standard model with singlet Higgs fields as well as vectorlike colored particles that mediate the decay a{yields}gg. The a is a pseudo-Nambu-Goldstone boson of a new global U(1) symmetry, and can naturally have any mass from a few GeV to m{sub h}/2. All interactions can be perturbative up to the GUT scale, and gauge coupling unification is preserved if the colored mediators come in complete GUT representations. In this case a{yields}{gamma}{gamma} has a {approx}1% branching ratio, so h{yields}gg{gamma}{gamma} may be observable. The colored particles that mediate the a{yields}gg decay must be below the TeV scale, and can therefore be produced at the LHC. If these particles are stable on collider time scales, they will appear as R-hadrons, a signal visible in early LHC running. A smoking-gun signal that the stable colored particles are mediators of h{yields}4j is R-hadron production in association with an a. We show that this signal with a{yields}{gamma}{gamma} is observable at the LHC with as little as 10 fb{sup -1} of integrated luminosity. Observation of R-hadrons plus missing energy would show that the superpartner of the R-hadron is R-parity odd, and therefore not an ordinary quark or gluon.},
doi = {10.1103/PHYSREVD.83.075015},
url = {https://www.osti.gov/biblio/21537751}, journal = {Physical Review. D, Particles Fields},
issn = {0556-2821},
number = 7,
volume = 83,
place = {United States},
year = {2011},
month = {4}
}