One-Particle Measurement of the Antiproton Magnetic Moment

DiSciacca, Jack; Marshall, M.; Marable, K.; Gabrielse, Gerald; Ettenauer, S.; Tardiff, E. R.; Kalra, Rita; Fitzakerley, D. W.; George, M. C.; Hessels, E. A.; Storry, C. H.; Weel, M.; Grzonka, D.; Oelert, W.; Sefzick, T.

doi:10.48550/arxiv.1301.6310

Cited by 2 publications

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“…a better test of CPT invariance. Recently, the antiproton magnetic moment has been measured for the first time using a single trapped antiproton, reaching a precision of 4.4 ppm [30], which is far outside the reach of the technique presented in this work.…”

Section: Discussionmentioning

confidence: 87%

Microwave spectroscopic study of the hyperfine structure of antiprotonic³He

Friedreich

Barna

Caspers

et al. 2013

J. Phys. B: At. Mol. Opt. Phys.

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In this work, we describe the latest results for the measurements of the hyperfine structure of antiprotonic 3He. Two out of four measurable super–super-hyperfine (SSHF) transition lines of the (n, L) = (36, 34) state of antiprotonic 3He were observed. The measured frequencies of the individual transitions are 11.125 48(08) GHz and 11.157 93(13) GHz, with the increased precisions of about 43% and 25%, respectively, compared to our first measurements with antiprotonic 3He (Friedreich et al 2011 Phys. Lett. B 700 1–6). They are less than 0.5 MHz higher with respect to the most recent theoretical values, still within their estimated errors. Although the experimental uncertainty for the difference of 0.032 45(15) GHz between these frequencies is large as compared to that of theory, its measured value also agrees with theoretical calculations. The rates for collisions between antiprotonic helium and helium atoms have been assessed through comparison with simulations, resulting in an elastic collision rate of γe = 3.41 ± 0.62 MHz and an inelastic collision rate of γi = 0.51 ± 0.07 MHz.

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Section: Discussionmentioning

confidence: 87%

Microwave spectroscopic study of the hyperfine structure of antiprotonic³He

Friedreich

Barna

Caspers

et al. 2013

J. Phys. B: At. Mol. Opt. Phys.

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Microwave spectroscopic study of the hyperfine structure of antiprotonic helium-3

Friedreich,

Barna,

Caspers

et al. 2013

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In this work we describe the latest results for the measurements of the hyperfine structure of antiprotonic 3 He. Two out of four measurable super-superhyperfine SSHF transition lines of the (n, L) = (36, 34) state of antiprotonic 3 He were observed. The measured frequencies of the individual transitions are 11.12548(08) GHz and 11.15793(13) GHz, with an increased precision of about 43% and 25% respectively compared to our first measurements with antiprotonic 3 He [S. Friedreich et al., Phys. Lett. B 700 (2011) 1-6]. They are less than 0.5 MHz higher with respect to the most recent theoretical values, still within their estimated errors. Although the experimental uncertainty for the difference of 0.03245(15) GHz between these frequencies is large as compared to that of theory, its measured value also agrees with theoretical calculations. The rates for collisions between antiprotonic helium and helium atoms have been assessed through comparison with simulations, resulting in an elastic collision rate of γ e = 3.41 ± 0.62 MHz and an inelastic collision rate of γ i = 0.51 ± 0.07 MHz.

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One-Particle Measurement of the Antiproton Magnetic Moment

Cited by 2 publications

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Microwave spectroscopic study of the hyperfine structure of antiprotonic³He

Microwave spectroscopic study of the hyperfine structure of antiprotonic³He

Microwave spectroscopic study of the hyperfine structure of antiprotonic helium-3

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One-Particle Measurement of the Antiproton Magnetic Moment

Cited by 2 publications

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Microwave spectroscopic study of the hyperfine structure of antiprotonic3He

Microwave spectroscopic study of the hyperfine structure of antiprotonic3He

Microwave spectroscopic study of the hyperfine structure of antiprotonic helium-3

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Microwave spectroscopic study of the hyperfine structure of antiprotonic³He

Microwave spectroscopic study of the hyperfine structure of antiprotonic³He