The FAMU experiment: muonic hydrogen high precision spectroscopy studies

Pizzolotto, C.; Adamczak, A.; Bakalov, D.; Baldazzi, G.; Baruzzo, M.; Benocci, R.; Bertoni, R.; Bonesini, M.; Bonvicini, V.; Cabrera, Humberto; Cirrincione, D.; Citossi, Marco; Chignoli, F.; Clemenza, M.; Colace, Lorenzo; Danailov, M.B.; Danev, P.; Bari, A. de; Vecchi, C. De; Vincenzi, M. De; Fasci, Eugenio; Furlanetto, E.; Fuschino, F.; Gadedjisso-Tossou, K. S.; Gianfrani, L.; Guffanti, D.; Hillier, A. D.; Ishida, K.; King, P.J.C.; Labanti, C.; Maggi, Valter; Mazza, R.; Menegolli, A.; Mocchiutti, E.; Moretti, Luigi; Morgante, G.; Niemela, Joseph; Patrizi, Barbara; Pirri, Angela; Pullia, A.; Ramponi, Roberta; Rignanese, L. P.; Roman, H. E.; Rossella, M.; Sarkar, R.; Sbrizzi, A.; Stoilov, Michail; Stoychev, L.; Suárez-Vargas, José; Toci, Guido; Tortora, L.; Vallazza, E.; Vannini, Matteo; Xiao, Chao-Ting; Zampa, G.; Vacchi, A.

doi:10.1140/epja/s10050-020-00195-9

Cited by 37 publications

(24 citation statements)

References 49 publications

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“…There are three collaborations aiming at the measurement of the ground-state HFS in µH: one collaboration at J-PARC (Japan) [67], one at RIKEN-RAL (UK) [68,69], and one at PSI (Switzerland) [70]. Their goal is to measure with 1 ppm accuracy by means of pulsed laser spectroscopy from which precise information about the magnetic structure of the proton can be extracted.…”

Section: New Experiments With Muonic Atomsmentioning

confidence: 99%

Muonic-Atom Spectroscopy and Impact on Nuclear Structure and Precision QED Theory

Antognini¹,

Bacca²,

Fleischmann³

et al. 2022

Preprint

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Section: New Experiments With Muonic Atomsmentioning

confidence: 99%

Muonic-Atom Spectroscopy and Impact on Nuclear Structure and Precision QED Theory

Antognini¹,

Bacca²,

Fleischmann³

et al. 2022

Preprint

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“…We consider also the projection for realistic improvements on the uncertainty of each system. All the hyperfine experimental measurements considered here have the common characteristic that the experimental uncertainty is larger than the theoretical one, thus, as a future projection, we consider that the experimental precision could reach the theoretical one in upcoming experiments such as the ones proposed by the CREMA collaboration [49] or FAMU [50]. We do not include the muonic deuterium 2s hyperfine measurement due to the recently found tension between the experimental and theoretical determinations [51].…”

Section: Jhep05(2022)002mentioning

confidence: 99%

Muonic vs electronic dark forces: a complete EFT treatment for atomic spectroscopy

Frugiuele

Peset

2022

J. High Energ. Phys.

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Precision atomic spectroscopy provides a solid model independent bound on the existence of new dark forces among the atomic constituents. We focus on the keV-GeV region investigating the sensitivity to such dark sectors of the recent measurements on muonic atoms at PSI. To this end we develop for the first time, the effective field theory that describes the leading effect of a new (pseudo-)vector or a (pseudo-)scalar particle of any mass at atomic energies. We identify in the Lamb Shift measurement in muonic deuterium (μD) and the 2s Hyperfine Splitting (HFS) in muonic hydrogen (μH) the most promising measurements to probe respectively spin-independent and spin-dependent new forces. Furthermore, we evaluate the expression of the vector force HFS finding that a future measurement of the 2s HFS in regular hydrogen could provide the strongest atomic bound for such a force for masses above 100 MeV.

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“…The FAMU (Fisica degli Atomi MUonici) experiment projected by C. Pizzolotto et al (INFN, RIKEN-RAL) aims to measure the hyperfine splitting of the muonic hydrogen ground state 82 . From this experiment the proton Zemach radius can be derived and this will shed light on the determination of the proton charge radius.…”

Section: Famumentioning

confidence: 99%

The quest for the proton charge radius

Angeli¹

2021

Preprint

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A slight anomaly in optical spectra of the hydrogen atom led Willis E. Lamb to the search for the proton size. As a result, he found the shift of the 2S 1/2 level, the first experimental demonstration of quantum electrodynamics (QED). In return, a modern test of QED yielded a new value of the charge radius of the proton. This sounds like Baron Münchausen's tale: to pull oneself out from the marsh by seizing his own hair. An independent method was necessary. Muonic hydrogen spectroscopy came to the aid. However, the high-precision result significantly differed from the previous -electronic -values: this is (was?) the proton radius puzzle (2010-2020?). This puzzle produced a decade-long activity both in experimental work and in theory. Even if the puzzle seems to be solved, the precise determination of the proton charge radius requires further efforts in the future.

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The FAMU experiment: muonic hydrogen high precision spectroscopy studies

Cited by 37 publications

References 49 publications

Muonic-Atom Spectroscopy and Impact on Nuclear Structure and Precision QED Theory

Muonic-Atom Spectroscopy and Impact on Nuclear Structure and Precision QED Theory

Muonic vs electronic dark forces: a complete EFT treatment for atomic spectroscopy

The quest for the proton charge radius

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