Kimiko YamashitaAssistant Professor
■Researcher basic information
Research Areas
Educational Background
- Apr. 2015 - Mar. 2018, Ochanomizu University, Graduate School of Humanities and Sciences, Department of Physics
- Apr. 2013 - Mar. 2015, Ochanomizu University, Graduate School of Humanities and Sciences, Department of Physics
- Apr. 2002 - Mar. 2006, Yamagata University, Faculty of Science, Department of Physics
Career
- Apr. 2023 - Present, Ibaraki University, Assistant Professor
- Mar. 2023 - Mar. 2023, Chung-Ang University, Visiting Scientist
- Oct. 2021 - Feb. 2023, Chung-Ang University, Brain Pool program postdoctoral fellow
- Sep. 2019 - Sep. 2021, Institute of High Energy Physics, Chinese Academy of Sciences, Postdoctoral Research Assistant
- Aug. 2018 - Jul. 2019, National Tsing Hua University, Postdoctoral Research Fellow
- Apr. 2018 - Jul. 2018, National Center for Theoretical Sciences, The thematic group 2: “Dark Physics of the Universe”, Postdoc Researcher
- Nov. 2016 - May 2017, LPSC Grenoble, Visitor
- Aug. 2015 - Dec. 2015, Virginia Polytechnic Institute and State University, Visitor
Member History
External link
■Research activity information
Paper
- Gravitational Positivity Bounds on Higgs-Portal Dark Matter
Kimiko Yamashita, Corresponding
preprint, Apr. 2025 - Standard Model anomalies and vacuum stability for lepton portals with extra $U(1)$ symmetry
Carlo Branchina; Hyun Min Lee; Kimiko Yamashita, Recently, the experimental values of the muon $(g-2)_\mu$ and of the $W$
boson mass $m_{_W}$ have both indicated significant deviations from the SM
predictions, motivating the exploration of extensions with extra particles and
symmetries. We revisit a lepton portal model with $U(1)'$ gauge symmetry where
an extra Higgs doublet, a scalar singlet and one $SU(2)_L$ singlet vector-like
fermion are introduced. In this model, $(g-2)_\mu$ can be explained by extra
one-loop contributions from the vector-like lepton and the $Z'$ boson, whereas
$m_{_W}$ can be increased by a tree-level mixing between the $Z$ and $Z'$.
Setting the $Z'$ and lepton couplings at low energies to account for the SM
anomalies, we perform a Renormalization Group analysis to investigate on the
high-energy behaviour of the model, in particular on the issue of vacuum
stability. We find that in the alignment limit for the two Higgs doublets, the
Landau pole and the scale where perturbativity is lost are of order
$10-100\,{\rm TeV}$, not far from the scales experimentally reached so far, and
sensibly lower than the stability scale. We show how the Landau pole can be
increased up to $\sim10^9\,{\rm GeV}$ in a misaligned scenario where the
experimental anomalies are still accommodated and a positive shift of the Higgs
quartic coupling to improve stability can be achieved.
Journal of High Energy Physics, 18 Mar. 2025, [Reviewed] - Higgs-portal spin-1 dark matter with parity-violating interaction
Kimiko Yamashita, Corresponding
Journal of High Energy Physics, 29 Oct. 2024, [Reviewed] - Positivity bounds on Higgs-portal freeze-in dark matter
Seong-Sik Kim; Hyun Min Lee; Kimiko Yamashita, Abstract
We consider the relic density and positivity bounds for freeze-in scalar dark matter with general Higgs-portal interactions up to dimension-8 operators. When dimension-4 and dimension-6 Higgs-portal interactions are proportional to mass squares for Higgs or scalar dark matter in certain microscopic models such as massive graviton, radion or general metric couplings with conformal and disformal modes, we can take the dimension-8 derivative Higgs-portal interactions to be dominant for determining the relic density via the 2-to-2 thermal scattering of the Higgs fields after reheating. We discuss the implications of positivity bounds for microscopic models. First, massive graviton or radion mediates attractive forces between Higgs and scalar dark matter and the resultant dimension-8 operators respect the positivity bounds. Second, the disformal couplings in the general metric allow for the subluminal propagation of graviton but violate the positivity bounds. We show that there is a wide parameter space for explaining the correct relic density from the freeze-in mechanism and the positivity bounds can curb out the dimension-8 derivative Higgs-portal interactions nontrivially in the presence of the similar dimension-8 self-interactions for Higgs and dark matter., Springer Science and Business Media LLC
Journal of High Energy Physics, 20 Nov. 2023, [Reviewed] - The SU(2)$_{D}$ lepton portals for muon g - 2, W boson mass and dark matter
Seong-Sik Kim; Hyun Min Lee; Adriana Guerrero Menkara; Kimiko Yamashita, We propose a novel model which extends the Standard Model (SM) by introducing a SU(2)_D gauge symmetry. In this model, a dark SU(2)_D Higgs doublet and a Higgs bi-doublet can contribute to the muon g-2 anomaly and the W boson mass, remaining in tune with the recent experimental results. At the same time, the isospin charged gauge boson of SU(2)_D becomes a plausible candidate for Dark Matter(DM). We find that the resulting parameter space can fit the muon g-2, the W boson mass and the DM constraints simultaneously., Stichting SciPost
SciPost Physics Proceedings, 04 Jul. 2023, [Reviewed] - Positivity bounds on Higgs-Portal dark matter
Seong Sik Kim; Hyun Min Lee; Kimiko Yamashita, We consider the positivity bounds for WIMP scalar dark matter with effective Higgs-portal couplings up to dimension-8 operators. Taking the superposed states for Standard Model Higgs and scalar dark matter, we show that the part of the parameter space for the effective couplings, otherwise unconstrained by phenomenological bounds, is ruled out by the positivity bounds on the dimension-8 derivative operators. We find that dark matter relic density, direct and indirect detection and LHC constraints are complementary to the positivity bounds in constraining the effective Higgs-portal couplings. In the effective theory obtained from massive graviton or radion, there appears a correlation between dimension-8 operators and other effective Higgs-portal couplings for which the strong constraint from direct detection can be evaded. Nailing down the parameter space mainly by relic density, direct detection and positivity bounds, we find that there are observable cosmic ray signals coming from the dark matter annihilations into a pair of Higgs bosons, WW or ZZ.
Journal of High Energy Physics, Jun. 2023, [Reviewed] - Moments for positivity: using Drell-Yan data to test positivity bounds and reverse-engineer new physics
Xu Li; Ken Mimasu; Kimiko Yamashita; Chengjie Yang; Cen Zhang; Shuang-Yong Zhou
Journal of High Energy Physics, 17 Oct. 2022, [Reviewed] - SU (2)D lepton portals for the muon g-2, W -boson mass, and dark matter
Seong Sik Kim; Hyun Min Lee; Adriana G. Menkara; Kimiko Yamashita, We propose a novel model for lepton flavor and dark matter based on the SU(2)D gauge symmetry and vectorlike leptons in its fundamental representations. We introduce a dark SU(2)D Higgs doublet and a Higgs bidoublet for the mass mixing between the vectorlike lepton and the lepton. As a result, the seesaw lepton masses are generated and there are sizable one-loop contributions to the muon g-2 via the SU(2)D gauge bosons and the relatively heavy vectorlike lepton, as indicated in Fermilab E989. The tree-level mass mixing between the Z boson and the isospin-neutral gauge boson of SU(2)D in our model accounts for the shift in the W boson mass, being consistent with Tevatron CDFII. Finally, we show that the isospin charged gauge boson of SU(2)D becomes a plausible candidate for dark matter with a small mass splitting tied up to the modified W boson mass, and there is a viable parameter space where the favored corrections to the muon g-2 and the W boson mass and the dark matter constraints are simultaneously fulfilled.
Physical Review D, 01 Jul. 2022, [Reviewed] - A model of vector-like leptons for the muon g- 2 and the W boson mass
Lee, H.M.; Yamashita, K.
European Physical Journal C, 2022, [Reviewed] - Reheating and dark matter freeze-in in the Higgs-R 2 inflation model
Aoki; S.; Lee; H.M.; Menkara; A.G.; Yamashita; K.
Journal of High Energy Physics, 2022, [Reviewed] - Searching for monopoles via monopolium multiphoton decays
Neil D. Barrie; Akio Sugamoto; Matthew Talia; Kimiko Yamashita
Nuclear Physics B, Nov. 2021, [Reviewed] - Elastic positivity vs extremal positivity bounds in SMEFT: a case study in transversal electroweak gauge-boson scatterings
Kimiko Yamashita; Cen Zhang; Shuang-Yong Zhou
Journal of High Energy Physics, 18 Jan. 2021, [Reviewed] - Seesaw lepton masses and muon g- 2 from heavy vector-like leptons
Lee; H.M.; Song; J.; Yamashita; K., Springer Science and Business Media {LLC}
Journal of the Korean Physical Society, 2021, [Reviewed] - Search for vector-mediated dark matter at the LHC with forward proton tagging
Gi-Chol Cho; Kimiko Yamashita; Miki Yonemura
Physical Review D, 18 Feb. 2020, [Reviewed] - Higgs inflation, vacuum stability, and leptogenesis
Barrie; N.D.; Sugamoto; A.; Takeuchi; T.; Yamashita; K.
Journal of High Energy Physics, 2020, [Reviewed] - The effects of coating culture dishes with collagen on fibroblast cell shape and swirling pattern formation
Hashimoto; K.; Yamashita; K.; Enoyoshi; K.; Dahan; X.; Takeuchi; T.; Kori; H.; Gotoh; M., Motile human-skin fibroblasts form macroscopic swirling patterns when grown to confluence on a culture dish. In this paper, we investigate the effect of coating the culture-dish surface with collagen on the resulting pattern, using human-skin fibroblast NB1RGB cells as the model system. The presence of the collagen coating is expected to enhance the adherence of the fibroblasts to the dish surface, and thereby also enhance the traction that the fibroblasts have as they move. We find that, contrary to our initial expectation, the coating does not significantly affect the motility of the fibroblasts. Their eventual number density at confluence is also unaffected. However, the coherence length of cell orientation in the swirling pattern is diminished. We also find that the fibroblasts cultured in a collagen-coated dish are rounder in shape and shorter in perimeter, compared to those cultured in an uncoated dish. We hypothesize that the rounder cell-shape which weakens the cell-cell nematic contact interaction is responsible for the change in coherence length. A simple mathematical model of the migrating fibroblasts is constructed, which demonstrates that constant motility with weaker nematic interaction strength does indeed lead to the shortening of the coherence length.
Journal of Biological Physics, 2020, [Reviewed] - Unitary inflaton as decaying dark matter
Choi; S.-M.; Kang; Y.-J.; Lee; H.M.; Yamashita; K., We consider the inflation model of a singlet scalar field (sigma field) with both quadratic and linear non-minimal couplings where unitarity is ensured up to the Planck scale. We assume that a $Z_2$ symmetry for the sigma field is respected by the scalar potential in Jordan frame but it is broken explicitly by the linear non-minimal coupling due to quantum gravity. We discuss the impacts of the linear non-minimal coupling on various dynamics from inflation to low energy, such as a sizable tensor-to-scalar ratio, a novel reheating process with quartic potential dominance, and suppressed physical parameters in the low energy, etc. In particular, the linear non-minimal coupling leads to the linear couplings of the sigma field to the Standard Model through the trace of the energy-momentum tensor in Einstein frame. Thus, regarding the sigma field as a decaying dark matter, we consider the non-thermal production mechanisms for dark matter from the decays of Higgs and inflaton condensate and show the parameter space that is compatible with the correct relic density and cosmological constraints.
Journal of High Energy Physics, 2019, [Reviewed] - Vacuum magnetic birefringence experiment as a probe of the dark sector
Fan; X.; Kamioka; S.; Yamashita; K.; Asai; S.; Sugamoto; A.
Progress of Theoretical and Experimental Physics, 2018, [Reviewed] - LHC searches for top-philic Kaluza-Klein graviton
Geng; C.-Q.; Huang; D.; Yamashita; K.
Journal of High Energy Physics, 2018, [Reviewed] - Pendulum Leptogenesis
Bamba; K.; Barrie; N.D.; Sugamoto; A.; Takeuchi; T.; Yamashita; K.
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 2018, [Reviewed] - Ratchet baryogenesis and an analogy with the forced pendulum
Bamba; K.; Barrie; N.D.; Sugamoto; A.; Takeuchi; T.; Yamashita; K., World Scientific Pub Co Pte Lt
Modern Physics Letters A, 2018, [Reviewed] - Simplified dark matter models with a spin-2 mediator at the LHC
Kraml; S.; Laa; U.; Mawatari; K.; Yamashita; K.
European Physical Journal C, 2017, [Reviewed] - Generalized Heisenberg-Euler formula in Abelian gauge theory with parity violation
Yamashita; K.; Fan; X.; Kamioka; S.; Asai; S.; Sugamoto; A.
Progress of Theoretical and Experimental Physics, 2017, [Reviewed] - Construction of a model of monopolium and its search via multiphoton channels at LHC
Barrie; Neil D.; Sugamoto; Akio; Yamashita; Kimiko
PTEP, 01 Nov. 2016, [Reviewed] - Quantification of Interaction between Human Skin Fibroblasts and Collagen by Image Texture Analysis
Md. K. Bashar; K. Hashimoto; K. Enoyoshi; K. Yamashita; M. Gotoh; H. Kori
J. of Bioinformatics and Neuroscience (JBINS), Dec. 2015, [Reviewed] - Pattern Quantification from Human Skin Fibroblast Images Image quantification for fibroblast chracterization
Md. Khayrul Bashar; Kei Hashimoto; Kanako Enoyoshi; Kimiko Yamashita; Mari Gotoh; Hiroshi Kori, Collagen plays an important role in maintaining healthy structures in human skin. Fibroblasts are the cells located in collagen-rich skin dermis and they are responsible for producing collagen of connective tissue. However, the effects of coating of the culture dish with collagen on fibroblast culture are still unknown. Therefore, to uncover the effects, we propose a quantitative method based on Gray-Level Co-occurrence Matrix. This method computes two texture similarity indices, called "Texture Mean Distance (TMD)" and "Texture Mean Spread (TMS)" by integrating texture features from images. An experiment with two sets of microscope cell culture images with and without collagen coating demonstrates promising performances of the metrics to identify the effects of collagen on human fibroblasts., IEEE
2015 INTERNATIONAL CONFERENCE ON INTELLIGENT INFORMATICS AND BIOMEDICAL SCIENCES (ICIIBMS), 2015, [Reviewed] - Search for Kaluza-Klein gravitons in extra dimension models via forward detectors at the LHC
Cho; G.-C.; Kono; T.; Mawatari; K.; Yamashita; K.
Physical Review D - Particles, Fields, Gravitation and Cosmology, 2015, [Reviewed]
Lectures, oral presentations, etc.
- Vector-like lepton model for the muon g-2 and dark matter
Kimiko Yamashita
The 29th muon g-2/EDM collaboration meeting, 11 Dec. 2024
20241211, 20241213 - Higgs-Portal Spin-1 Dark Matter with Parity-Violating Interaction
Kimiko Yamashita
COSMO'24, 22 Oct. 2024
20241021, 20241025 - High Energy Physics and Dark Matter (in Japanese)
山下 公子
Seminar at Tokyo Woman's Christian Univ., 28 Jun. 2024, [Invited] - Real Scalar Dark Matter and UV Completion
Kimiko Yamashita
CosmoGravitas, 14 Jun. 2024, [Invited]
20240610, 20240614 - Positivity Bounds on Higgs-Portal Dark Matter
Kimiko Yamashita
The Future is Flavourful, 05 Jun. 2024
20240604, 20240606 - Positivity Bounds on Higgs-Portal Dark Matter
Seong-Sik Kim
6th Mini-Workshop on "CHIRALITY IN THE UNIVERSE BEYOND THE ELECTROWEAK SCALE", 27 Apr. 2024
20240426, 20240429 - Positivity Bounds on Higgs-Portal Dark Matter
Kimiko Yamashita
The 37th Regular Meeting of the New Higgs Working Group, 20 Jan. 2024
20240120, 20240120 - Positivity Bounds on Higgs-Portal Dark Matter
Kimiko Yamashita
Seminar at Osaka Univ., 14 Nov. 2023, [Invited] - Positivity Bounds on Higgs-Portal Dark Matter
Kimiko Yamashita
KEK Theory Meeting on Particle Physics Phenomenology (KEK-PH2023), 07 Nov. 2023
20231107, 20231110 - Positivity Bounds on Higgs-Portal Dark Matter
山下 公子
Online seminar at Shinshu Univ., 31 Oct. 2023, [Invited] - Positivity Bounds on Higgs-Portal Dark Matter
Kimiko Yamashita
26th International Conference on Particle Physics and Cosmology (COSMO'23), 14 Sep. 2023, Instituto de Física Teórica (IFT UAM-CSIC)
20230911, 20230915 - Positivity Bounds on Higgs-Portal Dark Matter
Kimiko Yamashita
Progress in Particles Physics 2023, 28 Aug. 2023, [Invited]
20230828, 20230901 - Positivity Bounds on Higgs-Portal Dark Matter
Kimiko Yamashita
Kickoff Workshop (Searching for New Particles using Gravitational Waves), 12 Jun. 2023
20230612, 20230612 - Positivity Bounds on Higgs-Portal Dark Matter
Kimiko Yamashita
HPNP2023 - The 6th International Workshop on "Higgs as a Probe of New Physics 2023", 08 Jun. 2023
20230605, 20230609 - Positivity bounds on Higgs-portal dark matter
Kimiko Yamashita
2023 Chung-Ang University Beyond the Standard Model Workshop, 21 Feb. 2023, Shuntaro Aoki (CAU), Carlo Branchina (CAU), Sookyung Choi (CAU), Chang Hyon Ha (CAU), Yu Seon Jeong (CAU), Gungwon Kang (CAU), Siyeon Kim (CAU), Hyun Min Lee (CAU), Seong Chan Park (Yonsei), Kimiko Yamashita (CAU)
20230220, 20230224 - Moments for positivity: using Drell-Yan data to test positivity bounds and reverse-engineer new physics
Kimiko Yamashita
The Physical Society of Japan 2023 Spring Meeting, 23 Feb. 2023 - Boson Dark Matter Models
Kimiko Yamashita
2022 CAU High Energy Physics Center Workshop, 22 Dec. 2022
20221222, 20221223 - Reheating and dark matter freeze-in in the Higgs-R^2 inflation model
Kimiko Yamashita
64th OMEG-SSANP Workshop, 12 Dec. 2022
20221212, 20221212 - Reheating and dark matter freeze-in in the Higgs-R^2 inflation model
Kimiko Yamashita
9th Korea-Japan Workshop on Dark Energy, 15 Nov. 2022
20221114, 20221118 - Positivity Bounds for Scalar Dark Matter
Kimiko Yamashita
Workshop on Physics of Dark Cosmos: dark matter, dark energy, and all, 22 Oct. 2022
20221021, 20221023 - Model for Muon g-2 and the W Boson Mass
Kimiko Yamashita
KPS 70th Anniversary and 2022 Fall Meeting, 19 Oct. 2022
20221018, 20221021 - Reheating and dark matter freeze-in in the Higgs-R^2 inflation model
Kimiko Yamashita
Seminar at Waseda Univ. (online), 07 Oct. 2022, [Invited] - Seesaw vector-like leptons for muon g-2, W boson mass, and dark matter
Kimiko Yamashita
Progress in Particle Physics 2022 (PPP2022), 29 Aug. 2022
20220829, 20220902 - A model of vector-like leptons for the muon g−2 and the W boson mass
Kimiko Yamashita
Asia Pacific Physics Conference 15 (APPC15, ONLINE), 23 Aug. 2022
20220821, 20220826 - Reheating and dark matter freeze-in in the Higgs-R^2 inflation model
Kimiko Yamashita
Seminar at Hiroshima Univ., 12 Aug. 2022, [Invited] - Seesaw vector-like leptons for muon g − 2, W boson mass, and dark matter
Kimiko Yamashita
The 27th International Symposium on Particle Physics, String Theory, and Cosmology (PASCOS2022), 25 Jul. 2022
20220725, 20220729 - Reheating and dark matter freeze-in in the Higgs-R2 inflation model
Kimiko Yamashita
2nd NCTS TG2.1 Hsinchu Hub Workshop: The Future is illuminating (Virtual), 28 Jun. 2022
20220628, 20220630 - Seesaw lepton masses and muon g-2 from heavy vector-like leptons
Kimiko Yamashita
2022 Korean Physical Society Spring Meeting (ONLINE), 20 Apr. 2022
20220420, 20220422 - Seesaw lepton masses and muon g-2 from heavy vector-like leptons
Kimiko Yamashita
2021 CAU High Energy Physics Center Workshop, Dec. 2021
20211222, 20211223 - Seesaw lepton masses and muon g-2 from heavy vector-like leptons
Kimiko Yamashita
Workshop on particle physics and cosmology 2021, 27 Nov. 2022
20211126, 20211128 - Elastic positivity vs extremal positivity bounds in SMEFT: a case study in transversal electroweak gauge-boson scatterings
Kimiko Yamashita
Recent development of beyond the standard model, 19 Oct. 2022
20211018, 20211019 - Elastic positivity vs extremal positivity bounds in SMEFT
Kimiko Yamashita
Summer camp on ILC accelerator, physics and detectors 2021 (ONLINE), 24 Sep. 2021
20210921, 20210924 - Elastic positivity vs extremal positivity bounds in SMEFT
Kimiko Yamashita
Seminar at Kyushu Univ. (online), 09 Jul. 2021, [Invited] - 1st EFT study meeting
Kimiko Yamashita
1st EFT study meeting, 01 Jul. 2021
20210630, 20210702 - Elastic positivity vs extremal positivity bounds in SMEFT: a case study in transversal electroweak gauge-boson scatterings
Kimiko Yamashita
The 26th International Symposium on Particle Physics, String Theory, and Cosmology (PASCOS2021, ONLINE), 18 Jun. 2021
20210614, 20210618 - Elastic positivity vs extremal positivity bounds in SMEFT
Kimiko Yamashita
Seminar at Kyoto Univ., 26 May 2021, [Invited] - Higgs Inflation, Vacuum Stability, and Leptogenesis
Kimiko Yamashita
The 5th International Workshop on “Higgs as a Probe of New Physics” Special Edition 2021 (HPNP2021, ONLINE), 25 Mar. 2021
20210325, 20210327 - Higgs Inflation, Vacuum Stability, and Leptogenesis
Kimiko Yamashita
The Physical Society of Japan Annual (76th) Meeting (ONLINE), 13 Mar. 2021
20210312, 20210315 - Higgs Inflation, Vacuum Stability, and Leptogenesis,
Kimiko Yamashita
Professor Chao-Qiang Geng online workshop (Recent development of beyond the standard model), 08 Dec. 2022
20201207, 20201208 - Higgs Inflation, Vacuum Stability, and Leptogenesis
Kimiko Yamashita
Seminar at Chung-Ang Univ. (online), 12 Nov. 2020 - SMEFT Meets UV Completion with Analyticity and Unitarity
Kimiko Yamashita
The Physical Society of Japan 2020 Autumn Meeting (ONLINE), 15 Sep. 2020
20200914, 20200917 - Baryogenesis mechanism from the dynamics of a rotating forced pendulum
Kimiko Yamashita
Seminar at Iwate Univ., 29 Jun. 2020 - SMEFT meets UV completion with Analyticity and Unitarity
Kimiko Yamashita
Seminar at Tokyo Univ., 28 Feb. 2020 - SMEFT Meets UV Completion with Analyticity and Unitarity
Kimiko Yamashita
KEK Theory Meeting on Particle Physics Phenomenology (KEK-PH2020), 18 Feb. 2020
20200218, 20200221 - Unitary inflaton as decaying dark matter
Kimiko Yamashita
International joint workshop on the Standard Model and beyond, 17 Oct. 2019
20191014, 20191017 - LHC Searches for Top-philic Kaluza-Klein Graviton
Kimiko Yamashita
The thirteenth particle physics phenomenology workshop, 05 Jun. 2019
20190603, 20190606 - Unitary inflaton as decaying dark matter
Kimiko Yamashita
Seminar at Chung Yuan Christian Univ., 04 Jun. 2019, [Invited] - Unitary inflaton as decaying dark matter
Kimiko Yamashita
Seminar at National Chiao Tung Univ., 28 May 2019, [Invited] - Unitary inflaton as decaying dark matter
Kimiko Yamashita
Seminar at Korea Institute for Advanced Study (KIAS), 24 May 2019 - Pendulum Leptogenesis
Kimiko Yamashita
Seminar at Chung-Ang Univ., 22 May 2019, [Invited] - LHC Searches for Kaluza-Klein Graviton Decaying into SM/DM particles
Kimiko Yamashita
Seminar at National Central Univ., 24 Apr. 2019, [Invited] - LHC Searches for Kaluza-Klein Graviton Decaying into SM/DM particles
Kimiko Yamashita
Seminar at National Taiwan Univ., 14 Jan. 2019, [Invited] - LHC Searches for Kaluza-Klein Graviton Decaying into SM/DM particles
Kimiko Yamashita
KEK Theory Meeting on Particle Physics Phenomenology (KEK-PH2018 winter) and 3rd KIAS-NCTS-KEK workshop on Particle Physics Phenomenology, 04 Dec. 2018, [Invited]
20181204, 20181208 - LHC Searches for Kaluza-Klein Graviton Decaying into SM/DM particles
Kimiko Yamashita
Seminar at Chung-Ang Univ., 15 Nov. 2018, [Invited] - LHC Searches for Kaluza-Klein Graviton
Kimiko Yamashita
Seminar at National Chiao Tung Univ., 16 Oct. 2018, [Invited] - Pendulum Leptogenesis
Kimiko Yamashita
The Physical Society of Japan 2018 Autumn Meeting, 14 Sep. 2018
20180914, 20180917 - Collective Flows of Asymmetric Dumbbells
Kimiko Yamashita
The Physical Society of Japan 2018 Autumn Meeting, 11 Sep. 2018
20180909, 20180912 - Search for Dark Neutrino via Vacuum Magnetic Birefringence Experiment
Kimiko Yamashita
Seminar at Kavli IPMU, 04 Apr. 2018 - Clemmow-Mullaly-Allis (CMA) Diagram for Electromagnetic Waves in the Vacuum
Kimiko Yamashita
The Physical Society of Japan Annual (73rd) Meeting, 25 Mar. 2018
20180322, 20180325 - Search for Dark Neutrino via Vacuum Magnetic Birefringence Experiment
Kimiko Yamashita
KEK Theory Meeting on Particle Physics Phenomenology (KEK-PH2018),, 16 Feb. 2018
20180213, 20180216 - Implications for the Vacuum Magnetic Birefringence Experiment from the Parity Violating Interactions between Fermionic Dark Matter and Extra U(1) Mediator
Kimiko Yamashita
Joint NTHU/NCTS theory seminar, 21 Dec. 2017 - Implications for the Vacuum Magnetic Birefringence Experiment from the Parity Violating Interactions between Fermionic Dark Matter and Extra U(1) Mediator
Kimiko Yamashita
Seminar at National Taiwan Univ., 18 Dec. 2017 - Searching for fermions with parity-violating interactions via the hidden U(1) gauge field to photon by the vacuum birefringence experiment, and the EFT Lagrangian of 4-photon fields
Kimiko Yamashita
Seminar at Maskawa Institute for Science and Culture in Kyoto Sangyo Univ., 20 Nov. 2017, [Invited] - Simplified dark matter models with a spin-2 mediator at the LHC
Kimiko Yamashita
Osaka-Workshop 2017, 13 Nov. 2017
20171111, 20171113 - Implications for the Vacuum Magnetic Birefringence Experiment from the Parity Violating Interactions between Fermionic Dark Matter and Extra U(1) Mediator
Kimiko Yamashita
Seminar at IBS-CTPU, 28 Sep. 2017 - Implications for the Vacuum Magnetic Birefringence Experiment from the Parity Violating Interactions between Fermionic Dark Matter and Extra U(1) Mediator
Kimiko Yamashita
Seminar at Korea Institute for Advanced Study (KIAS), 25 Sep. 2017 - Implications for the Vacuum Magnetic Birefringence Experiment from the Parity Violating Interactions between Fermionic Dark Matter and Extra U(1) Mediator
Kimiko Yamashita
Seminar at APCTP, 22 Sep. 2017 - Simplified dark matter models with a spin-2 mediator at the LHC
Kimiko Yamashita
The Physical Society of Japan 2017 Autumn Meeting, 14 Sep. 2017
20170912, 20170915 - Generalized Heisenberg-Euler Formula in Abelian Gauge Theory with Parity Violation
Kimiko Yamashita
The Physical Society of Japan 2017 Autumn Meeting, 13 Sep. 2017
20170912, 20170915 - Implications for the Vacuum Magnetic Birefrigence Experiment from the Parity Violating Interactions between Fermionic Dark Matter and Extra U(1) Mediator
Kimiko Yamashita
Progress in Particle Physics 2017 (PPP2017), 03 Aug. 2017
20170731, 20170804 - Implications for the Vacuum Magnetic Birefrigence Experiment from the Parity Violating Interactions between Fermionic Dark Matter and Extra U(1) Mediator
Kimiko Yamashita
Progress in Particle Physics 2017 (PPP2017), 03 Aug. 2017
20170731, 20170804 - Implications for the Vacuum Magnetic Birefringence Experiment from the Parity Violating Interactions between Fermionic Dark Matter and Extra U(1) Mediator
Kimiko Yamashita
The 13th International Workshop on the Dark Side of the Universe, 11 Jul. 2017
20170710, 20170714 - Implications for the Vacuum Magnetic Birefringence Experiment from the Parity Violating Interactions between Fermionic Dark Matter and Extra U(1) Mediator
Kimiko Yamashita
Seminar at Saitama Univ., 07 Jul. 2017, [Invited] - Simplified dark matter models with a spin-2 mediator at the LHC
Kimiko Yamashita
LHCTheory ERC meeting, 24 Mar. 2017
20170322, 20170324 - Ratchet baryogenesis during reheating
Kimiko Yamashita
The Third Asia-Europe-Pacific School of High-Energy Physics (AEPSHEP 2016), 16 Oct. 2016
20161012, 20161025 - Dark matter constraints on simplified models with s-channel spin-2 mediators
Kimiko Yamashita
The Third Asia-Europe-Pacific School of High-Energy Physics(AEPSHEP 2016), 16 Oct. 2016
20161012, 20161025 - Comprehensive study on simplified DM models with a spin-2 mediator
Kimiko Yamashita
The Physical Society of Japan 2016 Autumn Meeting, 21 Sep. 2016
20160921, 20160924 - Construction of a Model of Monopolium and its Search via Multi-Photon Channels at LHC
Kimiko Yamashita
Progress in Particle Physics 2016 (PPP2016), 08 Sep. 2016
20160905, 20160909 - Ratchet Baryogenesis during Reheating
Kimiko Yamashita
The Physical Society of Japan Annual (71st) Meeting, 21 Mar. 2016
20160319, 20160322 - Search for Kaluza-Klein gravitons in extra dimension models via forward detectors at the LHC
Kimiko Yamashita
Seminar at LPSC Grenoble, 11 Mar. 2016 - Ratchet baryogenesis during reheating
Kimiko Yamashita
Seminar at Virginia Polytechnic Institute and State University, 21 Oct. 2015 - Ratchet baryogenesis during reheating
Kimiko Yamashita
The 23rd International Conference on Supersymmetry and Unification of Fundamental Interactions (SUSY 2015), 26 Aug. 2015
20150823, 20150829 - Search for Kaluza-Klein gravitons in extra dimension models via forward detectors at the LHC
Kimiko Yamashita
Seminar at Toyama Univ., 29 May 2015 - Search for extra dimensions via forward detectors at the LHC
Kimiko Yamashita
The Physical Society of Japan 2014 Autumn Meeting, 19 Sep. 2014
20140918, 20140921 - Search for extra dimensions via forward detectors at the LHC
Kimiko Yamashita
The 22nd International Conference on Supersymmetry and Unification of Fundamental Interactions (SUSY 2015), 21 Jul. 2014
20140721, 20140726
Courses
- Research of Quantum Beam Science I
Apr. 2025 - Present
Ibaraki University - Research of Quantum Beam Science III
Apr. 2025 - Present
Ibaraki University - Seminar on Foreign Textbook I
Apr. 2025 - Present
Ibaraki University - Graduation Research
Apr. 2025 - Present
Ibaraki University - Research of Quantum Beam Science II
Dec. 2024 - Feb. 2025
Ibaraki University - Research of Quantum Beam Science IV
Sep. 2024 - Feb. 2025
Ibaraki University - Graduation Research
Apr. 2024 - Feb. 2025
Ibaraki University - Exercises in Physics II
Oct. 2024 - Jan. 2025
Ibaraki University - Computational Exercises in Mathematical Physics/Quantum Beam Spectroscopy I
Sep. 2024 - Sep. 2024
Ibaraki University - Elementary Particle Physics I
Jun. 2024 - Aug. 2024
Ibaraki University - Exercises in Physics I
Jun. 2024 - Aug. 2024
Ibaraki University - Research of Quantum Beam Science I
Jun. 2024 - Jul. 2024
Ibaraki University - Research of Quantum Beam Science III
Apr. 2024 - Jul. 2024
Ibaraki University - Seminar on Foreign Textbook I
Apr. 2024 - May 2024
Ibaraki University - Introduction to Integrated Sciences
Apr. 2024 - Apr. 2024
Ibaraki University - Research of Quantum Beam Science II
Oct. 2023 - Mar. 2024 - Exercises in Physics II
Oct. 2023 - Feb. 2024
Ibaraki University - Seminar on Foreign Textbook II
Sep. 2023 - Nov. 2023
Ibaraki University - Computational Exercises in Mathematical Physics/Quantum Beam Spectroscopy I
Sep. 2023 - Sep. 2023
Ibaraki University - Research of Quantum Beam Science I
Jun. 2023 - Aug. 2023
Ibaraki University - Exercises in Physics I
Apr. 2023 - Aug. 2023
Ibaraki University
Affiliated academic society
Research Themes
- Approach from Effective Field Theory to Reveal the Properties of Dark Matter (in Japanese)
Grant-in-Aid for Early-Career Scientists
Ibaraki Univ.
Apr. 2024 - Mar. 2029 - Study on the origin of inflation and light dark matter
Oct. 2021 - Feb. 2023 - Seeking for the CP-Symmetry Violation Origin of the Universe
Sep. 2019 - Sep. 2021 - Exploring Frontiers in Particle Physics and Cosmology
National Tsing Hua University
Aug. 2018 - Jul. 2019
Social Contribution Activities
- Visiting Lab. (Physics): Science Tour at Science Department, Ibaraki University
presenter
Ibaraki prefectural Mito second high school, Ibaraki Univ., 18 Apr. 2025 - 18 Apr. 2025 - High Energy Physics and Dark Matter (in Japanese)
lecturer
Ibaraki prefectural Mitsukaido high school, 28 Oct. 2024 - 28 Oct. 2024 - High Energy Physics and Dark Matter (in Japanese)
lecturer
Ibaraki prefectural Hokota first high school, 09 Sep. 2024 - 09 Sep. 2024 - Visiting Lab. (Physics): Science Tour at Science Department, Ibaraki University
presenter
SSH high school and university connection committee, Ibaraki prefectural Mito second high school, 19 Apr. 2024 - 19 Apr. 2024
Academic Contribution Activities
- The 2nd NTHU and Ibaraki Univ. co-seminar (Physics)
Planning etc
28 Nov. 2024 - 28 Nov. 2024 - 27th New Physics Forum
Planning etc
21 Nov. 2024 - 21 Nov. 2024 - The first NTHU and Ibaraki Univ. co-seminar (Physics)
Planning etc
30 Oct. 2024 - 30 Oct. 2024 - Progress of Theoretical and Experimental Physics (PTEP)
Peer review
Jul. 2024 - Aug. 2024 - Joint Workshop of Meeting on Physics at B factories & New Physics Forum
Planning etc
New Physics Forum and Meeting on Physics at B Factories, 19 Jun. 2024 - 19 Jun. 2024 - 2024 Chung-Ang University Beyond the Standard Model Workshop
Panel chair etc
Chung-Ang Univ., Seoul, Korea, 19 Feb. 2024 - 23 Feb. 2024 - The European Physical Journal C
Peer review
Jun. 2023 - Feb. 2024 - 2023 Chung-Ang University Beyond the Standard Model Workshop
Planning etc
Shuntaro Aoki (CAU), Carlo Branchina (CAU), Sookyung Choi (CAU), Chang Hyon Ha (CAU), Yu Seon Jeong (CAU), Gungwon Kang (CAU), Siyeon Kim (CAU), Hyun Min Lee (CAU), Seong Chan Park (Yonsei), Kimiko Yamashita (CAU), Chung-Ang Univ., Seoul, Korea, 20 Feb. 2023 - 24 Feb. 2023 - 2022 Chung-Ang University Beyond the Standard Model Workshop (ONLINE)
Planning etc
Chang Hyon Ha (CAU), Gungwon Kang (CAU), Hyun Min Lee (CAU), Shuntaro Aoki (CAU), Kimiko Yamashita (CAU), Chung-Ang Univ., Seoul, Korea, 07 Feb. 2022 - 10 Feb. 2022 - Results in Physics
Peer review
Apr. 2021 - Jun. 2021 - KEK Theory Meeting on Particle Physics Phenomenology (KEK-PH2020)
Panel chair etc
KEK, Japan, 18 Feb. 2020 - 21 Feb. 2020 - The 5th International Workshop on Dark Matter, Dark Energy and Matter-antimatter Asymmetry
Panel chair etc
Taiwan, 28 Dec. 2018 - 31 Dec. 2018
