Natural h{yields}4g in supersymmetric models and Rhadrons 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 finetuning 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 pseudoNambuGoldstone 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 Rhadrons, a signal visible in early LHC running. A smokinggun signal that the stable colored particles are mediators of h{yields}4j is Rhadron production in association with an a. We show that this signal with a{yields}{gamma}{gamma} is observablemore »
 Authors:

 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 05562821
 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; U1 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 Rhadrons 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 Rhadrons 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 Rhadrons 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 Rhadrons 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 finetuning 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 pseudoNambuGoldstone 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 Rhadrons, a signal visible in early LHC running. A smokinggun signal that the stable colored particles are mediators of h{yields}4j is Rhadron 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 Rhadrons plus missing energy would show that the superpartner of the Rhadron is Rparity 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 = {05562821},
number = 7,
volume = 83,
place = {United States},
year = {2011},
month = {4}
}