New method of exploring physics beyond standard model

New method of exploring physics beyond standard model M. Yoshimura @ Okayama • Usually, high energy (short distance) or precision frontier • Another frontier of high power and high quality beam: laser • Atomic electrons and muonium: abundant and varieties of tunability

From decay　(passive) to reaction　(active) • High intensity flux of laser commercially available • Reaction time • Laser is unique choice

Target physics now • Lepton number nonconservation (LENNON) with Majorana masses: charge flipping electron capture • Lepton flavor violation (LFV): muonium decay

Perturbative computation

Quality factor of laser

Limitation on perturbative computation • Limit on largest Q-factor: yet unknown • New mechanism, involving atom as a whole: many encounters of recoil nucleus with atomic electrons

• To avoid the difficult task of tuning, it is best to design lasing medium as target too, thus united detector-target system.

LENNON • Hep-ph /0506062 “New method of enhancing lepton number nonconservation”, Ikeda, Nakano, Sakuda, Tanaka, Yoshimura

Example of large matrix element and nuclear gamma

Physical background

Summary on LENNON

LFV (Lepton Flavor Violation) • Hep-ph to appear “Prospect of Photon Irradiated Compression as a Tool of Investigating Fundamental Physics beyond Standar Model” MY

Really serious background

Summary • Both LENNON and LFV mounium decay feasible in principle To avoid the difficult task of tuning, it is best, for atomic process, to design lasing medium as target too, thus united detector-target system