Berkeley Week at Kavli IPMU

14 Jan 2020, 08:30 → 17 Jan 2020, 17:00 Asia/Tokyo

Seminar room B(1F), Kavli IPMU

Berkeley Week at the Kavli IPMU brings students and postdocs from Berkeley to interact with students and postdocs from University of Tokyo, an opportunity to  expand the scientific and cultural horizon for both sides.  The event has focused on particle phenomenology.  This time we expanded the program to include talks on field theory, astrophysics, and cosmology including several speakers at the faculty level.  It is a part of the new graduate program Forefront Physics and Mathematics to Drive Transformation (FoPM).

 

Dates: January 14-17, 2020
Venue: Seminar room B, Kavli IPMU

Speakers:

Chiaki Kobayashi

Daiki Ueda

David Dunsky

Domenico Orlando

Eisuke Sonomoto

Eleanor Hall

Hajime Fukuda

Hiromasa Nakatsuka

Ippei Obata

Ipsita Saha

Jacob Leedom

Kaisei Watanabe

Keisuke Yanagi

Kenta Ando

Kohei Hayashi

Koichi Hamaguchi

Liz Wildenhain

Masahiro Ibe

Melina Bersten

Neil Barrie

Ofri Telem

Robert McGehee

Shih-Yen Tseng

Shin Kobayashi

Shunichi Horigome

Simeon Hellerman

So Chigusa

Sunao Sugiyama

Susanne Reffert

Taichi Ago

Taisuke Katayose

Takaaki Kajita

Tobias Binder

Yevgeny Stadnik

Zhengkang (Kevin) Zhang

 

Organizers:

Hitoshi Murayama (Kavli IPMU, UC Berkeley, Lawrence Berkeley National Laboratory)
 

Sponsers:

Kavli IPMU
UC Berkeley
Center for Japanese Studies
Forefront Physics and Mathematics to Drive Transformation (FoPM)

 

Contact : seminar@ipmu.jp
Kavli Institute for the Physics and Mathematics of the Universe (Kavli IPMU), the University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa City, Chiba 277-8583, Japan

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Tuesday, 14 January

09:00 → 09:30 Breakfast

09:30 → 10:00 Testing seesaw and leptogenesis by gravitational wave

Speaker: Prof. Hitoshi Murayama (Berkeley, Kavli IPMU)

Berkeley Week 2020.pdf

10:00 → 10:30 Oscillon of Ultra-Light Axion-like Particle

Speaker: Mr Eisuke Sonomoto (ICRR)

Berkley.pdf

10:30 → 11:00 Matter Through the Looking Glass

Speaker: Ms Eleanor Hall (UC Berkeley)

Matter Through the Looking Glass.pdf

11:00 → 11:30 Break

11:30 → 12:00 Introduction to the large charge expansion

Speaker: Dr Domenico Orlando (INFN division of Turin)

Big-J-talk.pdf

12:00 → 12:30 J-factor estimation of Draco, Sculptor and Ursa Minor dwarf spheroidal galaxies with the member/foreground mixture model

Speaker: Mr Shunichi Horigome (Kavli IPMU)

ShunichiHorigome.pdf

13:30 → 14:00 How to apply to a postdoc position

Speaker: Mr Robert McGehee (Berkeley)

Robert postoc application slides.pdf

14:00 → 14:30 New Type of String Solutions with Long Range Forces

Speaker: Prof. Masahiro Ibe (ICRR)

ibe_BerkelyWeek.pdf

14:30 → 15:00 Big Bounce Baryogenesis

Speaker: Dr Neil Barrie (Kavli IPMU)

BBB_pres_BW.pdf

15:00 → 15:30 tea time

15:30 → 16:30 Alireza Allahyarisadeghabadi (IPM, Tehran, Iran)

https://research.ipmu.jp/seminar/?seminar_id=2423

16:30 → 17:00 Flowing to the Bounce

Speaker: Mr So Chigusa (Hongo)

Chigusa slide.pdf

Wednesday, 15 January

09:00 → 09:30 Breakfast

09:30 → 10:00 On the New Uncertainty Relation Derived Geometrically from Aharonov's Weak Value

Speaker: Mr Kaisei Watanabe (KEK)

On_the_New_Uncertainty_Relation_Derived_Geometrically_from_Aharonov's_Weak_Value.pdf

10:00 → 10:30 Gauge Anomalies in an Effective Field Theory, the On-Shell Way

In a seminal paper, John Preskill showed how gauge theories in the Higgs phase can couple consistently to anomalous matter content. This formulation is complementary to the traditional approach in which gauge theories with an anomalous fermion content necessitate gauged-WZW terms that cancel the fermion anomaly. The gauge invariant statement that follows is that anomalous theories in the Higgs phase are completely consistent with unitarity, when considered as EFTs.

In this work we shed more light on the consistency of anomalous gauge theories in the Higgs phase, using the recently discovered, on-shell notion of gauge anomalies as tension between locality and unitarity at 1-loop. We demonstrate how this tension is reconciled in the Higgs phase by calculating the 1-loop contribution of massless chiral fermions to the massive 4-vector amplitude. This is the one of the first full 1-loop calculations that combine the method of generalized unitarity with Nima Arkani-Hamed’s massive amplitude formalism.

Speaker: Dr Ofri Telem (Berkeley)

Anomalies in an EFT, the On-Shell Way, IPMU.pdf

10:30 → 11:00 Model of Composite Asymmetric Dark Matter

Speaker: Mr Shin Kobayashi (ICRR)

Bekeley_week_ShinKobayashi.pdf

11:00 → 11:30 Group Photo and Break

11:30 → 12:00 Rapid bound-state formation of Dark Matter in the Early Universe

Speaker: Dr Tobias Binder (Kavli IPMU)

TB.pdf

12:00 → 12:30 On the infinite gradient-flow for the domain-wall formulation of chiral lattice gauge theories

Speaker: Mr Taichi Ago (Hongo)

TaichiAgo.pdf

13:30 → 14:00 Life in Japan

Speakers: Prof. Domenico Orlando (INFN division of Turin) , Prof. Susanne Reffert (University of Bern)

LifeInJP.pdf

14:00 → 14:30 QCD Axion Dark Matter from a Late Time Phase Transition

Speaker: Mr Jacob Leedom (Berkeley)

JML_Berkeley@IPMU.pdf

14:30 → 15:00 Asymptotic safety and walking dynamics at large charge

Speaker: Prof. Susanne Reffert (University of Bern)

Talk_Reffert-Berkeley.pdf

15:00 → 15:30 tea time

15:30 → 16:00 Amplification of gravitational motion via quantum weak measurement

Speaker: Mr Daiki Ueda (KEK)

berley_2020.pdf

16:00 → 16:30 Aspects of Nonlinear Effect on Black Hole Superradiance

Under some conditions, light boson fields grow exponentially around a rotating black hole, called the superradiance instability. We discuss effects of nonlinear interactions of the boson on the instability. In particular, we focus on the effect of the particle production and show that the growth of the boson cloud may be saturated much before the black hole spin is extracted by the boson cloud, while the nonlinear interactions also induce the boson emission. For application, we revisit the superradiant instability of the standard model photon, axion and hidden photon.

Speaker: Dr Hajime Fukuda (Berkeley)

Fukuda Berkeley week.pdf

16:30 → 17:00 Higgs Parity, Strong CP, Dark Matter, and Leptogenesis

Speaker: Mr David Dunsky (Berkeley)

Higgs Parity, Strong CP, DM, and Lepto.pdf

Thursday, 16 January

09:00 → 09:30 Breakfast

09:30 → 10:00 Dark Matter Heating vs. Rotochemical Heating in Old Neutron Stars

Speaker: Prof. Koichi Hamaguchi (Hongo)

2020Jan_Berkeley-week._Hamaguchi.pdf

10:00 → 10:30 Temporal Bell inequality violations in cosmological perturbations

Speaker: Mr Kenta Ando (ICRR)

Ando_BerkeleyWeek2020.pdf

10:30 → 11:00 Q-ball DM and its decay through A-term

Speaker: Mr Hiromasa Nakatsuka (ICRR)

HNakatsuka_BerWeek_reduced.pdf

11:00 → 11:30 Break and another group photo with Kajita (11:15)

11:30 → 12:00 Neutrino studies in Kamioka

How research may not go as planned, and how collaboration between experiments and theories are important.

Speaker: Prof. Takaaki Kajita (ICRR)

200116 BerkeleyWeekIPMU Kajita.pdf

12:00 → 12:30 New ideas in light dark matter direct detection.

Speaker: Dr Zhengkang (Kevin) Zhang (Berkeley)

2001_ldm.pdf

13:30 → 14:00 Life in Japan

Speaker: Mr Shih-Yen Tseng (Hongo)

life_in_japan_ShihYen.pdf

14:00 → 15:00 Shing-Chi Leung (Caltech)

https://research.ipmu.jp/seminar/?seminar_id=2478

15:00 → 15:30 tea time

15:30 → 16:00 Models of Core-Collapse Supernovae and Shock Breakout

Speaker: Dr Melina Bersten (National Scientific and Technical Research Council-Argentia)

bersten_IPMU.pdf

16:00 → 16:30 The origin of elements in the Universe

Speaker: Prof. Chiaki Kobayashi (University of Hertfordshire)

200116.pdf

16:30 → 17:00 Non relativistic effect on indirect probe of EWIMP at LHC

Speaker: Mr Taisuke Katayose (Kavli IPMU)

Berkeley_NR_EWIMP.pdf

17:30 → 20:00 banquet

Friday, 17 January

09:00 → 09:30 Breakfast

09:30 → 10:00 Limit on the axion decay constant from the cooling neutron star in Cassiopeia A

Speaker: Mr Keisuke Yanagi (Hongo)

yanagi_berkeley_week.pdf

10:00 → 10:30 Distinguishing neutrino mass hierarchy from DM annihilation

Speaker: Dr Ipsita Saha (Kavli IPMU)

Bweek_2020_Saha.pdf

10:30 → 11:00 Axion Dark Matter Search with Interferometric Detectors

Speaker: Dr Ippei Obata (ICRR)

Berkeleyweek_Obata.pdf

11:00 → 11:30 Break

11:30 → 12:00 Direct Detection Signals from Absorption of Fermionic Dark Matter

Speaker: Mr Robert McGehee (Berkeley)

slides-1.pdf

12:00 → 12:30 Galactic Archaeology: Unveiling the nature of dark matter

Speaker: Dr Kohei Hayashi (ICRR)

BerkeleyWeek2020_Hayashi.pdf

13:30 → 14:00 How to succeed outside Japan

Speaker: Prof. Hitoshi Murayama (Berkeley, Kavli IPMU)

success.pdf

14:00 → 14:30 Islands, Double Holography, and Other Recent Advances in the Black Hole Information Paradox

Speaker: Ms Liz Wildenhain (Berkeley)

Wildenhain Berkeley Week 2020.pdf

14:30 → 15:00 Novel approaches to dark matter detection with atomic, molecular and optical experiments

Speaker: Dr Yevgeny Stadnik (Kavli IPMU)

Stadnik_2020_Jan_Berk-IPMU.pdf

15:00 → 15:30 tea time

15:30 → 16:00 Minimal gauged $U(1)_{L_{\alpha}-L_{\beta}}$ models driven into a corner

Speaker: Mr Shih-Yen Tseng (Hongo)

U(1)_lepto_BerkeleyWeek_ShihYen.pdf

16:00 → 16:30 Integrability at Large Quantum Number

Speaker: Prof. Simeon Hellerman (Kavli IPMU)

integrability-at-large-quantum-number-berkeley-week-2020-kavli-IPMU-v-6.pdf

16:30 → 17:00 Constraints on Primordial Black Holes with Microlensing: Wave & Finite Source Effects / PBH from Multiverse

Speaker: Mr Sunao Sugiyama (Kavli IPMU)

sunaosugiyama_at_BerkeleyWeek.pdf