Natural supersymmetry, muon g−2, and the last crevices for the top squark

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dc.citation.firstpage055025en_US
dc.citation.issueNumber5en_US
dc.citation.journalTitlePhysical Review Den_US
dc.citation.volumeNumber92en_US
dc.contributor.authorPadley, B. Paulen_US
dc.contributor.authorSinha, Kuveren_US
dc.contributor.authorWang, Kechenen_US
dc.date.accessioned2016-06-10T19:01:57Z
dc.date.available2016-06-10T19:01:57Z
dc.date.issued2015en_US
dc.description.abstractWe study the interplay of natural supersymmetry and a supersymmetric solution to the discrepancy observed in measurements of the muon magnetic moment. The strongest constraints on the parameter space currently come from chargino searches in the trilepton channel and slepton searches in the dilepton channel at the LHC, and vast regions are currently allowed, especially at large tanβ. With light top squarks in the spectrum, as required from naturalness arguments, the situation changes dramatically; stop-assisted chargino and neutralino production via t˜→bχ˜±1 and t˜→tχ˜01 are already probing the entire parameter space compatible with the muon magnetic moment at tanβ∼O(10), while upcoming stop searches will probe most of the parameter space at larger tanβ∼40. Direct Higgsino searches as well as compressed slepton and stop searches are crucial to close out corners of parameter space. We consider one such example: in the presence of light sleptons and charginos as required to obtain appreciable contributions to the muon magnetic moment, compressed stops can dominantly undergo the following decay t˜→bℓ˜ν(ν˜ℓ)→bℓνχ˜01, facilitated by off-shell charginos. We find that the enhanced branching to leptons leads to a 5σ mass reach (with 3000  fb−1 of data at LHC14) of mt˜∼350  GeV, with the mass difference between stops and the lightest neutralino being ∼80  GeV. This will further close out a significant part of the parameter space compatible with naturalness and the muon magnetic moment.en_US
dc.identifier.citationPadley, B. Paul, Sinha, Kuver and Wang, Kechen. "Natural supersymmetry, muon g−2, and the last crevices for the top squark." <i>Physical Review D,</i> 92, no. 5 (2015) American Physical Society: 055025. http://dx.doi.org/10.1103/PhysRevD.92.055025.
dc.identifier.doihttp://dx.doi.org/10.1103/PhysRevD.92.055025en_US
dc.identifier.urihttps://hdl.handle.net/1911/90494
dc.language.isoengen_US
dc.publisherAmerican Physical Society
dc.rightsArticle is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
dc.titleNatural supersymmetry, muon g−2, and the last crevices for the top squarken_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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