Table 2 Fit results for 1S–2S spectra

From: Precision spectroscopy of the hyperfine components of the 1S–2S transition in antihydrogen

Transition

Run

Magnetic field (T)

Offset from hydrogen (kHz)

Frequency (kHz)

Statistical uncertainty (kHz)

Systematic uncertainty (kHz)

d–d

1

1.032637(7)

2.3

2,466,061,103,082.3

4.6

3.6

c–c

1

1.032637(7)

–1.3

2,466,061,707,383.3

5.0

3.8

c–c

2

1.032610(7)

–7.6

2,466,061,707,376.6

8.4

3.9

  1. The offsets \({f}^{\bar{{\rm{H}}}}-{f}^{{\rm{H}},{\rm{ADJ}}}\) from resonance frequencies in ordinary hydrogen are based on our calculation of the hydrogen frequencies in our measured magnetic field. For the c–c component in antihydrogen, this calculation is meaningful under the assumption that at zero magnetic field, the c–c component in hydrogen coincides with the d–d component.
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