Berkeley Week at the University of Tokyo

11 Mar 2024, 10:00 → 15 Mar 2024, 17:40 Asia/Tokyo

Lecture Room 340 (Faculty of Science Bldg.1)

Hajime Fukuda (Kavli IPMU), Hitoshi Murayama (Kavli IPMU), Koichi Hamaguchi (Department of Physics, University of Tokyo), Satoshi Shirai

This meeting revives the annual Berkeley Week events we used to have before the pandemic. It brings students and postdocs from Berkeley and the University of Tokyo together primarily in the area of particle phenomenology for exchanging ideas and mutual inspiration. It provides international experience for both sides. Even within the University of Tokyo, it provides a valuable opportunity for people from Department of Physics, Institute for Cosmic Ray Research (ICRR), Kavli Institute for the Physics and Mathematics of the Universe (Kavli IPMU), Research Center for the Early Universe (RESCEU), and International Center for Elementary Particle Physics (ICEPP) to get together. 

Due to various constraints, this is the first time to hold this meeting on Hongo Campus. 

The cost for the reception is 3,000 yen each.

Monday 11 March

10:20 → 11:50 Session 1

10:20 Welcome

10:30 Quantum Magnetometry in search of Dark Matter

Speaker: Itai Bloch (Berkeley)

QuantumMagnetometry.ItayBloch.pdf

11:10 Quantum simulation of the Schwinger model with a topological term

Speaker: Lento Nagano (ICEPP)

UT-Berkeley-pheno-workshop.pdf

11:50 → 13:00 Lunch

13:00 → 14:20 Session 2

13:00 SUSY GUT and the doublet-triplet splitting problem

Speaker: Shihwen Hor (Physics)

20240311_Shihwen.pdf

13:40 WZW via Generalized Cohomology

Speaker: Shota Saito (Kavli IPMU)

BW_ShotaSaito.pdf

BW_ShotaSaito.pptx

14:20 → 14:40 Coffee break

14:40 → 16:00 Session 3

14:40 Phenomenological impacts of axionic wormholes

Speaker: Yoshiki Kanazawa (Physics)

Berkeley_week2024_Kanazawa.pdf

15:20 Neutrino Mass Measurement with Cosmic Gravitational Focusing

Speaker: Pedro Pasquini (Physics)

PedroPasquini_Berkeley_Week_2024___nu_mass_from_cosmology.pdf

16:00 → 16:10 Group Photo

Group Photo

16:10 → 16:30 Coffee break

16:30 → 17:30 Seminar

16:30 Deciphering the Mysteries of the Long-Lived Particles: Perspectives from LHC, FCC-hh and Muon Collider

Conventional searches at the LHC operate under the assumption that Beyond the Standard Model particles undergo immediate decay upon production. However, this assumption lacks inherent a priori justification. This talk delves into the exploration of displaced decay signatures across various collider experiments. Combining insights from several studies, we show how small Yukawa couplings, compressed mass spectra, and collider boosts lead to distinctive displaced decays, observable at the CMS, ATLAS and proposed future detectors. These phenomena, manifesting within both Type-I and Type-III seesaw mechanisms, the Vector-like lepton model with non-zero hypercharge, and the Inert Triplet Model, provide a unique insight into the behaviors of neutrinos and dark matter. The seminar highlights the technical challenges and breakthroughs in detecting and interpreting these signatures, emphasizing their significance in probing the depths of the extensions of the Standard Model.

References: 1) JHEP 02 (2023) 103
2) Eur.Phys.J.C 82 (2022) 3, 230
3) arXiv: 2310.08883 [hep-ph]
4) arXiv: 2401.02697 [hep-ph]

Speaker: Chandrima Sen (Indian Institute of Technology Hyderabad)

Chandrima_Utokyo.pdf

Tuesday 12 March

10:30 → 11:50 Session 4

10:30 Wave-like dark matter detection using qubits

Speaker: Thanaporn Sichanugrist (Physics)

TS_Berkeley_week.pdf

11:10 Multiphonon Processes in Spin-Dependent Dark-Matter Scattering

Speaker: Bethany Suter (Berkeley)

Dark Matter Direct Detection for Spin-Dependent Interactions.pdf

Dark Matter Direct Detection for Spin-Dependent Interactions.pptx

11:50 → 13:00 Lunch

13:00 → 14:20 Session 5

13:00 Starobinsky Inflation and beyond in Einstein-Cartan Gravity

Speaker: Muzi Hong (RESCEU)

EC_gravity_Muzi_Hong.pdf

13:40 WIMP search at future muon collider

Speaker: Atsuya Niki (Physics)

berkeley20240312.pdf

14:20 → 14:40 Coffee break

14:40 → 16:00 Session 6

14:40 Probing Parity-Violation in the Stochastic Gravitational Wave Background in Astrometry

Speaker: Qiuyue Liang (Kavli IPMU)

parity-violation-Berkeley week.pdf

15:20 Revisiting Metastable Cosmic String Breaking

Speaker: Akifumi Chitose (ICRR)

BerkeleyWeek_Chitose.pdf

16:00 → 16:20 Coffee break

16:20 → 17:00 Session 7

16:20 ILC Beam Dump Experiment and New Physics Search

Speaker: Kento Asai (ICRR)

BerkeleyWeek_KentoAsai.pdf

Wednesday 13 March

10:30 → 11:50 Session 8

10:30 In search of a Higgsino

Speaker: Weishuang (Linda) Xu (Berkeley)

Tokyo.pdf

11:10 Axion search with the observations of photon's birefringence effect

Speaker: Ippei Obata (Kavli IPMU)

Obata_BW2024.pdf

11:50 → 13:00 Lunch

13:00 → 14:20 Session 9

13:00 Gravitational Waves to Thermal CFT data

Speaker: Ben Concepcion (Berkeley)

Concepcion_IPMU_3_2024.pdf

13:40 Axion Mass from Small Instantons?

Speaker: Takafumi Aoki (ICRR)

BerkeleyWeek_Aoki.pdf

14:20 → 14:40 Coffee Break

14:40 → 16:00 Session 10

14:40 Neutrinophilic Self-interacting Dark Matter

Speaker: Tatsuya Aonashi (Kavli IPMU)

TatsuyaAonashi_BerkelyWeek2024.pdf

15:20 Thermal Leptogenesis in the Minimal Gauged U(1)Lμ−Lτ Model

Speaker: Juntaro Wada (Physics)

Barkeley_Week.pdf

16:00 → 16:20 Coffee break

16:20 → 17:00 Session 11

16:20 Axion detection using superfluid Helium-3

Speaker: Risshin Okabe (Kavli IPMU)

BerkeleyWeek2024_RisshinOkabe.pdf

18:00 → 20:00 Reception

Thursday 14 March

10:00 → 15:00 Envisaging Future Trajectories in Effective Field Theory (EFT in EFT)

Attendance optional https://indico.ipmu.jp/event/428/

15:00 → 15:30 Kavli IPMU Tea Time

15:30 → 17:00 Special Lecture: Research on the Extreme Universe Opened Up by New Observational Instruments and Expanding into Interdisciplinary Fields

15:30 Research on the Extreme Universe Opened Up by New Observational Instruments and Expanding into Interdisciplinary Fields

Speaker: Tadayuki Takahashi (Univ. of Tokyo)

17:30 → 18:30 Wine & Cheese Party

19:00 → 21:00 Dinner

Friday 15 March

10:30 → 11:50 Session 12

10:30 The baryon isocurvature problem of primordial magnetic fields

Speaker: Fumio Uchida (RESCEU)

BW_FU.pdf

11:10 Gamma rays from supernova axions converting in stellar magnetic fields: limits from SN1987A and a proposed future observatory

Speaker: Yujin Park (Berkeley)

BerkeleyWeek2024_Yujin.pdf

11:50 → 13:00 Lunch

13:00 → 14:20 Session 13

13:00 New Contributions to Lepton Dipole Moments in Vector-like Lepton Models

Speaker: Genta Osaki (Physics)

Berkeley_week_Genta_Osaki.pdf

13:40 Precise estimate of chargino decay rates

Speaker: Yuhei Nakayama (ICRR)

berkeley_week_2024.pdf

14:20 → 14:40 Coffee break

14:40 → 16:00 Session 14

14:40 Returning CP-observables to the frames they belong

Speaker: Rahool Kumar Barman (Kavli IPMU)

Unfolding.pdf

15:20 PBH Formation from QCD Axion Bubbles as SMBH Seeds

Speaker: Shunsuke Neda (ICRR)

Neda_Berkeley_Week.pdf

16:00 → 16:20 Coffee break

16:20 → 17:40 Session 15

16:20 Light Thermal Dark Matter and MeV Gamma-ray Detection

Speaker: Yu Watanabe (Kavli IPMU)

Berkeleyweek_watanabe.key

Berkeleyweek_watanabe.pdf