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Mu-MASS SIGNED

Muonium Laser Spectroscopy

Total Cost €

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EC-Contrib. €

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Partnership

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 Mu-MASS project word cloud

Explore the words cloud of the Mu-MASS project. It provides you a very rough idea of what is the project "Mu-MASS" about.

model    fermilab    hyperfine    frequency    famous    mass    fold    positive    shift    improvement    striking    lamb    sensitive    extract    profound    stringent    charge    bound    pi    electron    radius    finite    experiment    1000    detection    converters    physics    splitting    rydberg    point    anomalies    generations    moment    implications    sides    nuclear    leptons    experimental    cryogenic    vibrant    tests    particles    confinement    worldwide    scherrer    put    clarifying    theoretical    paul    schemes    accumulated    electrodynamics    mu    japan    quantum    hydrogen    substantial    solving    free    effort    1s    size    magnetic    puzzle    understand    performed    relies    ongoing    techniques    laser    triggered    origin    discrepancies    invoking    equality    psi    tantalizing    orders    lepton    muon    transition    positronium    anomalous    prompted    explanations    solutions    proton    magnitude    muonic    spectroscopy    standard    2s    muonium    universe    constant    notably    almost    hint    interesting   

Project "Mu-MASS" data sheet

The following table provides information about the project.

Coordinator
EIDGENOESSISCHE TECHNISCHE HOCHSCHULE ZUERICH 

Organization address
address: Raemistrasse 101
city: ZUERICH
postcode: 8092
website: https://www.ethz.ch/de.html

contact info
title: n.a.
name: n.a.
surname: n.a.
function: n.a.
email: n.a.
telephone: n.a.
fax: n.a.

 Coordinator Country Switzerland [CH]
 Total cost 1˙999˙150 €
 EC max contribution 1˙999˙150 € (100%)
 Programme 1. H2020-EU.1.1. (EXCELLENT SCIENCE - European Research Council (ERC))
 Code Call ERC-2018-COG
 Funding Scheme ERC-COG
 Starting year 2019
 Duration (year-month-day) from 2019-02-01   to  2024-01-31

 Partnership

Take a look of project's partnership.

# participants  country  role  EC contrib. [€] 
1    EIDGENOESSISCHE TECHNISCHE HOCHSCHULE ZUERICH CH (ZUERICH) coordinator 1˙999˙150.00

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 Project objective

Striking anomalies in the muon sector have accumulated in recent years: notably the famous anomalous muon magnetic moment (g-2) and the muonic hydrogen Lamb shift measurement which prompted the so-called proton charge radius puzzle. These tantalizing results triggered vibrant activity on both experimental and theoretical sides. Different explanations have been put forward including exciting solutions invoking New Physics beyond the Standard Model. To contribute to clarifying the origin of these anomalies, I propose Mu-MASS, an experiment aiming for a 1000-fold improvement in the determination of the 1S-2S transition frequency of Muonium (M), the positive-muon/electron bound state. This substantial improvement beyond the current state-of-the-art relies on the novel cryogenic M converters and confinement techniques developed by the PI, and on the new laser and detection schemes which the PI implemented for positronium spectroscopy. This experiment will be performed at the Paul Scherrer Institute (PSI). With the Mu-MASS result our knowledge of the muon mass can be improved by almost two orders of magnitude. By using the expected results of the ongoing hyperfine splitting measurement of M in Japan, it will provide one of the most sensitive tests of bound-state Quantum Electrodynamics. It can also be used to extract the muon g-2 from the ongoing experiment at Fermilab. Since M is a unique system composed of two different leptons (point-like particles), the Mu-MASS results will provide the most stringent test of charge equality between the lepton generations. Moreover, it can be used to determine the Rydberg constant free from nuclear and finite-size effects and contribute to solving the proton charge radius puzzle. Mu-MASS is thus very timely and essential to the worldwide effort to understand the interesting observed discrepancies, which could be a hint of New Physics and therefore have profound implications on our understanding of the Universe.

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