Gluino air showers as a signal of split supersymmetry

González, J. G.; Reucroft, S.; Swain, J.

doi:10.1103/physrevd.74.027701

Cited by 8 publications

(6 citation statements)

References 24 publications

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“…The series of mini-showers started by the gluinos will produce muon bundles at different slant-depths, and the front will exhibit a more pronounced curvature than what one would expect for a shower of the same energy interacting only in the upper atmosphere. For isolated gluino showers (i.e., not inside a proton event) these features have been discussed by Anchordoqui et al [27] and confirmed with a Montecarlo simulation in [28]. Previous works on air showers started by (lighter) long-lived gluinos were proposed as a possible explanation of the events beyond the GZK cutoff [29].…”

Section: Detectability Of the Gluino Pairsmentioning

confidence: 62%

“…The gluino-gluon R-hadrons will interact every 160 g/cm 2 , depositing in each interaction an average one per mille of their energy (this corresponds to the value k = 0.2 given above). Notice that the signal produced by a gluino hadron is quite different from that produced by a light hadron of the same energy [27,28]. A proton deposits most of its energy within a couple of vertical atmospheres (2000 g/cm…”

Section: Detectability Of the Gluino Pairsmentioning

confidence: 99%

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New physics from ultrahigh energy cosmic rays

2007

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Cosmic rays from outer space enter the atmosphere with energies of up to 10 11 GeV. The initial particle or a secondary hadron inside the shower may then interact with an air nucleon to produce nonstandard particles. In this article we study the production of new physics by high energy cosmic rays, focusing on the long-lived gluino of split-SUSY models and a WIMP working as dark matter. We first deduce the total flux of hadron events at any depth in the atmosphere, showing that secondary hadrons can not be neglected. Then we use these results to find the flux of gluinos and WIMPs that reach the ground after being produced inside air showers. We also evaluate the probability of producing these exotic particles in a single proton shower of ultrahigh energy. Finally we discuss the possible signal in current and projected experiments. While the tiny flux of WIMPs does not seem to have any phenomenological consequences, we show that the gluinos could modify substantially the profile of a small fraction of extensive air showers. In particular, they could produce a distinct signal observable at AUGER in showers of large zenith angle.

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Section: Detectability Of the Gluino Pairsmentioning

confidence: 62%

Section: Detectability Of the Gluino Pairsmentioning

confidence: 99%

New physics from ultrahigh energy cosmic rays

2007

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“…This analysis expands on previous work [35] by including all possible R interactions and analyzing in detail the potential of the surface array. Before describing the simulation, we introduce in the following section the main properties of R-hadron interactions.…”

Section: Introductionmentioning

confidence: 66%

“…1 in Ref. [35]. The R-hadron air showers then present a distinct profile: the flatness of the longitudinal development is unique to the extremely low inelasticity of the scattering, and can be easily isolated from the background.…”

Section: Air Shower Simulationsmentioning

confidence: 95%

Hunting long-lived gluinos at the Pierre Auger Observatory

et al. 2008

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Eventual signals of split supersymmetry in cosmic ray physics are analyzed in detail. The study focuses particularly on quasistable colorless R-hadrons originating from confinement of long-lived gluinos (with quarks, antiquarks, and gluons) produced in pp collisions at astrophysical sources. Because of parton density requirements, the gluino has a momentum which is considerably smaller than the energy of the primary proton, and so production of heavy (mass 500 GeV) R-hadrons requires powerful cosmic ray engines able to accelerate particles up to extreme energies, somewhat above 10 13:6 GeV. Using a realistic Monte Carlo simulation with the AIRES engine, we study the main characteristics of the air showers triggered when one of these exotic hadrons impinges on a stationary nucleon of the Earth's atmosphere. We show that R-hadron air showers present clear differences with respect to those initiated by standard particles. We use these shower characteristics to construct observables which may be used to distinguish long-lived gluinos at the Pierre Auger Observatory.

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“…SMPs would produce showers with exploitable signatures, e.g., strong electromagnetic component, long time span, narrow showers, and deep showers. The best studied case is that of R-hadrons (see Sections 2.1.2 and 3.2.1), motivated by the possibility that they could be responsible for the observed ultra-high-energy cosmic-ray events [408][409][410][411][412]. A generic search for deviations from expected air-shower shapes could be used to hint at the presence of R-hadrons, monopoles, Q-balls, strangelets, and micro-black holes [413], although such studies have not been published yet.…”

Section: Air-shower Observatoriesmentioning

confidence: 99%

Non-collider searches for stable massive particles

et al. 2015

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The theoretical motivation for exotic stable massive particles (SMPs) and the results of SMP searches at non-collider facilities are reviewed. SMPs are defined such that they would be sufficiently long-lived so as to still exist in the cosmos either as Big Bang relics or secondary collision products, and sufficiently massive such that they are typically beyond the reach of any conceivable accelerator-based experiment. The discovery of SMPs would address a number of important questions in modern physics, such as the origin and composition of dark matter and the unification of the fundamental forces. This review outlines the scenarios predicting SMPs and the techniques used at non-collider experiments to look for SMPs in cosmic rays and bound in matter. The limits so far obtained on the fluxes and matter densities of SMPs which possess various detection-relevant properties such as electric and magnetic charge are given.

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Gluino air showers as a signal of split supersymmetry

Cited by 8 publications

References 24 publications

New physics from ultrahigh energy cosmic rays

New physics from ultrahigh energy cosmic rays

Hunting long-lived gluinos at the Pierre Auger Observatory

Non-collider searches for stable massive particles

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