1.

A minimal SU(5) SuperGUT in pure gravity mediation
/ Evans, Jason L. ; Nagata, Natsumi ; Olive, Keith A.
The lack of evidence for lowscale supersymmetry suggests that the scale of supersymmetry breaking may be higher than originally anticipated. [...]
Published in EPJC 79 (2019) 490
10.1140/epjc/s1005201969804
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2.

Minimal gauged ${U\left(1\right)}_{{L}_{\alpha}{L}_{\beta}}$ models driven into a corner
/ Asai, Kento ; Hamaguchi, Koichi ; Nagata, Natsumi ; Tseng, ShihYen ; et al
It is well known that the differences between the lepton numbers can be gauged with the standard model matter content. [...]
Published in Physical Review D 99 (2019)
10.1103/PhysRevD.99.055029
arXiv:1811.07571
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3.

Singlet Dirac fermion dark matter with mediators at loop
/ Hisano, Junji ; Nagai, Ryo ; Nagata, Natsumi
We study the phenomenology of singlet Dirac fermion dark matter in the simplified models where the dark matter interacts with the Standard Model particles at looplevel with the help of either colored or noncolored mediators. [...]
Published in JHEP 1812 (2018) 059
10.1007/JHEP12(2018)059
arXiv:1808.06301
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4.

Limit on the axion decay constant from the cooling neutron star in Cassiopeia A
/ Hamaguchi, Koichi ; Nagata, Natsumi ; Yanagi, Keisuke ; Zheng, Jiaming
The observed rapid cooling of the neutron star (NS) located at the center of the supernova remnant Cassiopeia A (Cas A) can be explained in the minimal NS cooling scenario. [...]
Published in Physical Review D 98 (2018)
10.1103/PhysRevD.98.103015
arXiv:1806.07151
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5.

Nonuniversal gaugino masses in the NMSSM
/ Kawamura, Junichiro ; Kobayashi, Tatsuo ; Nagata, Natsumi
The NexttoMinimal Supersymmetric Standard Model (NMSSM) provides a natural framework to realize a lowscale supersymmetric (SUSY) model, where a singlet superfield is added to the minimal model to generate a SUSYscale higgsino mass term with its vacuum expectation value. [...]
Published in JHEP 1810 (2018) 120
10.1007/JHEP10(2018)120
arXiv:1808.07985
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6.

Looking for the left sneutrino LSP with displacedvertex searches
/ Lara, Iñaki ; LópezFogliani, Daniel E. ; Muñoz, Carlos ; Nagata, Natsumi ; et al
We analyze a displaced dilepton signal expected at the LHC for a tau left sneutrino as the lightest supersymmetric particle with a mass in the range 45–100 GeV. [...]
Published in Physical Review D 98 (2018)
10.1103/PhysRevD.98.075004
arXiv:1804.00067
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7.

Uncertainties in WIMP dark matter scattering revisited
/ Ellis, John ; Nagata, Natsumi ; Olive, Keith A.
We revisit the uncertainties in the calculation of spinindependent scattering matrix elements for the scattering of WIMP dark matter particles on nuclear matter. [...]
Published in EPJC 78 (2018) 569
10.1140/epjc/s100520186047y
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8.

Searching for metastable particles with submillimeter displaced vertices at hadron colliders
/ Ito, Hayato ; Jinnouchi, Osamu ; Moroi, Takeo ; Nagata, Natsumi ; et al
A variety of newphysics models predict metastable particles whose decay length is ≲ 1 mm. [...]
Published in JHEP 1806 (2018) 112
10.1007/JHEP06(2018)112
arXiv:1803.00234
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9.

Higgsino dark matter or not: Role of disappearing track searches at the LHC and future colliders
/ Fukuda, Hajime ; Nagata, Natsumi ; Otono, Hidetoshi ; Shirai, Satoshi
Higgsino in supersymmetric standard models is known to be a promising candidate for dark matter in the Universe. [...]
Published in Physics letters B (2018)
10.1016/j.physletb.2018.03.088
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10.

Predictions for the neutrino parameters in the minimal gauged U(1)LμLτ model
/ Asai, Kento ; Hamaguchi, Koichi ; Nagata, Natsumi
We study the structure of the neutrinomass matrix in the minimal gauged U(1)LμLτ model, where three righthanded neutrinos are added to the Standard Model in order to obtain nonzero masses for the active neutrinos. [...]
Published in EPJC 77 (2017) 763
10.1140/epjc/s100520175348x
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