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SUMMARY:Low-energy electron-positron collider to search and study (mu+ mu-
  ) bound state
DTSTART;VALUE=DATE-TIME:20190225T034000Z
DTEND;VALUE=DATE-TIME:20190225T041000Z
DTSTAMP;VALUE=DATE-TIME:20260711T231156Z
UID:indico-contribution-616@indico.inp.nsk.su
DESCRIPTION:Speakers: Anton Bogomyagkov (Budker Institute of Nuclear Physi
 cs)\nFrom six leptonic atoms (e^+ e^- )\, (μ^+ e^- )\, (μ^+ μ^- )\, (τ
 ^+ e^- )\, (τ^+ μ^- )\, (τ^+ τ^-  ) only positronium (e^+ e^- ) and mu
 onium (μ^+ e^- ) were observed. Observation and study of dimuonium (μ^+ 
 μ^- ) will test QED and quantum mechanics computations in the new regime.
  Dimuonium radius is 200 times smaller than positronium\; therefore\, it h
 as a higher new-physics reach potential in comparison with other exotic at
 oms. We propose a low energy  e^+ e^- collider for production of the not y
 et observed (μ^+ μ^- ) bound system. Low beam energy E_beam≈400 MeV an
 d small circumference Π≈30 m of the machine make it inexpensive to manu
 facture and operate. Large angle (〖75〗^∘) crossing of e^+ e^- beams 
 produces dimuonium with non-zero momentum shifting decay point from beams 
 collision area and providing effective suppression of the main source of b
 ackground  elastic e^+ e^- scattering. The peak luminosity at μ^+ μ^-
  production threshold is 8×〖10〗^31 cm^(-2) s^(-1). Reversing one of t
 he beams direction allows to study π^± and η  mesons with high lumin
 osity.\n\nhttps://indico.inp.nsk.su/event/15/contributions/616/
LOCATION: Conference room
URL:https://indico.inp.nsk.su/event/15/contributions/616/
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