Jonathan P. Hall

Indiana University Bloomington

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Stephen F. King

University of Southampton

R. Nevzorov

P.N. Lebedev Physical Institute of the Russian Academy of Sciences

Sandip Pakvasa

University of Hawaiʻi at Mānoa

Marc Sher

William & Mary

A. Belyaev

Saint Thomas - Rutherford Hospital

Patrik Svantesson

Rutherford Appleton Laboratory

Stefano Moretti

University of Southampton

Peter Athron

Institute of Theoretical Physics

D.J. Miller

University College London

H Saari

University of Helsinki

Cooperative Institutions

Stanford University

California Institute of Technology

Kavli Institute for Particle Astrophysics and Cosmology

SLAC National Accelerator Laboratory

Fermi National Accelerator Laboratory

University of California, Berkeley

Universidad Veritas

University of Chicago

University of Delaware

University of Minnesota

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Collider phenomenology of the E6SSM

arXiv (Cornell University) (2011)

Peter Athron Jonathan P. Hall Stephen F. King Stefano Moretti D.J. Miller

We consider collider signatures of the exceptional supersymmetric (SUSY) standard model (E6SSM). This E6 inspired SUSY model is based on the SM gauge group together with an extra U(1) gauge symmetry under which right--handed neutrinos have zero charge. To ensure anomaly cancellation and gauge coupling unification the low energy matter content of the E6SSM involve extra exotic matter beyond the MSSM. We discuss the collider signatures associated with the production of new particles predicted by the E6SSM and consider the implications of this model for dark matter and Higgs phenomenology. Since exotic quarks in the E6SSM can be either diquarks or leptoquarks they may provide spectacular new physics signals at the LHC.

Proton decay

Missing energy

10.48550/arxiv.1109.6373

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Citations (3)

Novel Higgs decays and dark matter in the exceptional supersymmetric standard model

Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D, Particles, fields, gravitation, and cosmology (2011)

Jonathan P. Hall Stephen F. King R. Nevzorov Sandip Pakvasa Marc Sher

The Exceptional Supersymmetric (SUSY) Standard Model (${\mathrm{E}}_{6}\mathrm{SSM}$) predicts three families of Higgs doublets plus three Higgs singlets, where one family develops vacuum expectation values (VEVs), while the remaining two which do not are called Inert. The model can account for the dark matter relic abundance if the two lightest Inert neutralinos, identified as the (next-to) lightest SUSY particles ((N)LSPs), have masses close to half the $Z$ mass. In this case we find that the usual SM-like Higgs boson decays more than 95% of the time into either LSPs or NLSPs. The latter case produces a final state containing two leptons ${l}^{+}{l}^{\ensuremath{-}}$ with an invariant mass less than or about 10 GeV. We illustrate this scenario with a set of benchmark points satisfying phenomenological constraints and the WMAP dark matter relic abundance. This scenario also predicts other light Inert chargino and neutralino states below 200 GeV, and large LSP direct detection cross sections close to current limits and observable soon at XENON100.

Light dark matter

Warm dark matter

Lightest Supersymmetric Particle

Chargino

10.1103/physrevd.83.075013

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Citations (53)

Nonstandard Higgs decays in the E(6)SSM

arXiv (Cornell University) (2010)

Jonathan P. Hall Stephen F. King R. Nevzorov Sandip Pakvasa

We study the nonstandard decays of the lightest Higgs state within the Exceptional Supersymmetric Standard Model (E6SSM). We argued that the SM--like Higgs boson can decay predominantly into dark matter particles while its branching ratios into SM particles varies from 2% to 4%. This scenario also implies the presence of other relatively light Inert chargino and neutralino states in the particle spectrum with masses below 200 GeV. We argue that in this case the decays of the lightest Higgs boson into l^{+} l^{-} + X may play an essential role in the Higgs searches.

Chargino

Lightest Supersymmetric Particle

Branching fraction

10.48550/arxiv.1012.5365

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Citations (2)

Low-mass dark matter search with CDMSlite

Physical Review Letters (2018)

R. Agnese A. J. Anderson T. Aralis T. Aramaki I. J. Arnquist

Source

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A new avenue to charged Higgs discovery in multi-Higgs models

Journal of High Energy Physics (2014)

Radovan Dermíšek Jonathan P. Hall Enrico Lunghi Seodong Shin

Current searches for the charged Higgs at the LHC focus only on the τν, cs, and tb final states. Instead, we consider the process pp → Φ → W ± H ∓ → W + W − A where Φ is a heavy neutral Higgs boson, H ± is a charged Higgs boson, and A is a light Higgs boson, with mass either below or above the $ b\overline{b} $ threshold. The cross-section for this process is typically large when kinematically open since H ± → W ± A can be the dominant decay mode of the charged Higgs. The final state we consider has two leptons and missing energy from the doubly leptonic decay of the W + W − and possibly additional jets; it is therefore constrained by existing SM Higgs searches in the W + W − channel. We extract these constraints on the cross-section for this process as a function of the masses of the particles involved. We also apply our results specifically to a type-II two Higgs doublet model with an extra Standard-Model-singlet and obtain new and powerful constraints on m H ± and tan β. We point out that a slightly modified version of this search, with more dedicated cuts, could be used to possibly discover the charged Higgs, either with existing data or in the future.

10.1007/jhep04(2014)140

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In Vitro Photodynamic Properties of Chalcogenopyrylium Analogues of the Thiopyrylium Antitumor Agent AA1

Journal of Medicinal Chemistry (2002)

Nancy K. Brennan Jonathan P. Hall Sherry R. Davies Sandra O. Gollnick Allan R. Oseroff

Several series of chalcogenopyrylium dyes were prepared with one or two 4-anilino substituents at the 2- and 6-positions and with phenyl, 4-N,N-dimethylanilino, or 4-(N-morphilino)phenyl substituents at 2- and/or 4-positions. The dye series are all related in structure to AA1, a thiopyrylium dye that targets mitochondria. The chalcogenopyrylium nuclei included sulfur, selenium, and tellurium at the 1-position. Key intermediates in the dye synthesis were the corresponding Δ-4H-chalcogenopyran-4-ones. All of the dyes of this study were evaluated for dark and phototoxicity toward Colo-26 cells in vitro. There was no correlation of dark toxicity with either the reduction potential of the chalcogenopyrylium dye or the n-octanol/water partition coefficient, log P. Several of the dyes of this study (thiopyrylium dyes 1-S and 13-S, selenopyrylium dyes 1-Se, 2-Se, 3-Se, 4-Se, 13-Se, 14-Se, and 27-Se, and telluropyrylium dye 13-Te) showed added phototoxicity upon irradiation. Dyes with the highest therapeutic ratio as measured by dark toxicity/phototoxicity (15 J cm-2 of 360−800-nm light) had values of log P of 1.0−1.2. Studies of cytochrome c oxidase activity in whole R3230AC cells suggested that dyes 1-S and 3-Se, with values of log P of 2.2 and 1.7, respectively, were localized in the mitochondria. Cytocrome c oxidase activity in whole cells was inhibited by 1-S and 3-Se in the dark. Chalcogenopyrylium dyes 2-Se, 4-Se, 13-Te, and 14-Se inhibited whole-cell cytochrome c oxidase activity only following irradiation, which suggests that these dyes relocalized to mitochondria following irradiation.

Phototoxicity

10.1021/jm020260m

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Citations (46)

Rethinking Categorical Distinction in Warfare

Jonathan P. Hall

Categorical variable

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Aspects of the Exceptional Supersymmetric Standard Model

Nuclear Physics B - Proceedings Supplements (2010)

Peter Athron Jonathan P. Hall Richard Howl Stephen F. King D.J. Miller

10.1016/j.nuclphysbps.2010.02.074

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Citations (36)

Nonstandard Higgs Decays and Dark Matter in the E6SSM

arXiv (Cornell University) (2011)

Jonathan P. Hall Stephen F. King R. Nevzorov Sandip Pakvasa Marc Sher

We study the decays of the lightest Higgs boson within the exceptional supersymmetric (SUSY) standard model (E6SSM). The E6SSM predicts three families of Higgs-like doublets plus three SM singlets that carry U(1)_{N} charges. One family of Higgs-like doublets and one SM singlet develop vacuum expectation values. The fermionic partners of other Higgs-like fields and SM singlets form inert neutralino and chargino states. Two lightest inert neutralinos tend to be the lightest and next-to-lightest SUSY particles (LSP and NLSP). The considered model can account for the dark matter relic abundance if the lightest inert neutralino has mass close to half the Z mass. In this case the usual SM-like Higgs boson decays more than 95% of the time into either LSPs or NLSPs. As a result the decays of the lightest Higgs boson into l^{+} l^{-} + X might play an essential role in the Higgs searches. This scenario also predicts other light inert chargino and neutralino states below 200 GeV and large LSP direct detection cross-sections which is on the edge of observability of XENON100.

Chargino

10.48550/arxiv.1109.4972

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Citations (9)

Neutralino dark matter with inert higgsinos and singlinos

Journal of High Energy Physics (2009)

Jonathan P. Hall Stephen F. King

Inert

10.1088/1126-6708/2009/08/088

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Citations (35)