Affiner les résultats

Lifetime and population of the 2S state in muonic hydrogen and deuterium

Diepold, Marc ; Amaro, Fernando D. ; Antognini, Aldo ; Biraben, François ; Cardoso, João M. R. ; Covita, Daniel S. ; Dax, Andreas ; Dhawan, Satish ; Fernandes, Luis M. P. ; Giesen, Adolf ; Gouvea, Andrea L. ; Graf, Thomas ; Hänsch, Theodor W. ; Indelicato, Paul ; Julien, Lucile ; Kao, Cheng-Yang ; Knowles, Paul ; Kottmann, Franz ; Bigot, Eric-Olivier Le ; Liu, Yi-Wei ; Lopes, José A. M. ; Ludhova, Livia ; Monteiro, Cristina M. B. ; Mulhauser, Françoise ; Nebel, Tobias ; Nez, François ; Rabinowitz, Paul ; Santos, Joaquim M. F. dos ; Schaller, Lukas A. ; Schuhmann, Karsten ; Schwob, Catherine ; Taqqu, David ; Veloso, João F. C. A. ; Vogelsang, Jan ; Pohl, Randolf ; CREMA Collaboration

In: Physical Review A, 2013, vol. 88, no. 4, p. 042520

Radiative deexcitation (RD) of the metastable 2S state of muonic hydrogen and deuterium atoms has been observed. In muonic hydrogen, we improve the precision on lifetime and population (formation probability) values for the short-lived μp(2S) component, and give an upper limit for RD of long-lived μp(2S) atoms. In muonic deuterium at 1 hPa,...

Laser spectroscopy of muonic hydrogen

Pohl, Randolf ; Antognini, Aldo ; Amaro, Fernando D. ; Biraben, François ; Cardoso, João M. R. ; Covita, Daniel S. ; Dax, Andreas ; Dhawan, Satish ; Diepold, Marc ; Fernandes, Luis M. P. ; Giesen, Adolf ; Gouvea, Andrea L. ; Graf, Thomas ; Hänsch, Theodor W. ; Indelicato, Paul ; Julien, Lucile ; Kao, Cheng-Yang ; Knowles, Paul ; Lopes, José A. M. ; Bigot, Eric-Olivier Le ; Liu, Yi-Wei ; Ludhova, Livia ; Monteiro, Cristina M. B. ; Mulhauser, Françoise ; Nebel, Tobias ; Nez, François ; Rabinowitz, Paul ; Santos, Joaquim M. F. dos ; Schaller, Lukas A. ; Schuhmann, Karsten ; Schwob, Catherine ; Taqqu, David ; Veloso, João F. C. A. ; Vogelsang, Jan ; Kottmann, Franz

In: Annalen der Physik, 2013, p. –

Muonic hydrogen (μp) is a very sensitive probe of the proton structure. Laser spectroscopy of two 2S-2P transitions in μp was used to determine both the Lamb shift and the hyperfine splitting of the 2S state in μp. The rms charge radius of the proton, inline image fm, was extracted from the Lamb shift. The Zemach radius of the proton, Rz = 1.082(37) fm, was obtained from the 2S-hyperfine...

Proton Structure from the measurement of 2S-2P transition frequencies of muonic hydrogen

Antognini, Aldo ; Nez, François ; Schuhmann, Karsten ; Amaro, Fernando D. ; Biraben, François ; Cardoso, João M. R. ; Covita, Daniel S. ; Dax, Andreas ; Dhawan, Satish ; Diepold, Marc ; Fernandes, Luis M. P. ; Giesen, Adolf ; Gouvea, Andrea L. ; Graf, Thomas ; Hänsch, Theodor W. ; Indelicato, Paul ; Julien, Lucile ; Kao, Cheng-Yang ; Knowles, Paul ; Kottmann, Franz ; Bigot, Eric-Olivier Le ; Liu, Yi-Wei ; Lopes, José A. M. ; Ludhova, Livia ; Monteiro, Cristina M. B. ; Mulhauser, Françoise ; Nebel, Tobias ; Rabinowitz, Paul ; Santos, Joaquim M. F. dos ; Schaller, Lukas A. ; Schwob, Catherine ; Taqqu, David ; Veloso, João F. C. A. ; Vogelsang, Jan ; Pohl, Randolf

In: Science, 2013, vol. 339, no. 6118, p. 417–420

The size of the proton from the Lamb-shift in muonic hydrogen

Nebel, Tobias ; Antognini, Aldo ; Amaro, Fernando D. ; Biraben, François ; Cardoso, João M. R. ; Covita, Daniel S. ; Dax, Andreas ; Dhawan, Satish ; Fernandes, LuisM. P. ; Giesen, Adolf ; Graf, Thomas ; Hänsch, Theodor W. ; Indelicato, Paul ; Julien, Lucile ; Kao, Cheng-Yang ; Knowles, Paul E. ; Kottmann, Franz ; Le Bigot, Eric-Olivier ; Liu, Yi-Wei ; Lopes, José A. M. ; Ludhova, Livia ; Monteiro, Cristina M. B. ; Mulhauser, Françoise ; Nez, François ; Rabinowitz, Paul ; Santos, Joaquim M. F. Dos ; Schaller, Lukas A. ; Schuhmann, Karsten ; Schwob, Catherine ; Taqqu, David ; Veloso, João F. C. A. ; Pohl, Randolf

In: Hyperfine Interactions, 2011, p. -

The proton radius puzzle

Antognini, Aldo ; Amaro, Fernando D. ; Biraben, François ; Cardoso, João M. R. ; Covita, Daniel S. ; Dax, Andreas ; Dhawan, Satish ; Fernandes, LuisM. P. ; Giesen, Adolf ; Graf, Thomas ; Hänsch, Theodor W. ; Indelicato, Paul ; Julien, Lucile ; Kao, Cheng-Yang ; Knowles, Paul E. ; Kottmann, Franz ; Le Bigot, Eric-Olivier ; Liu, Yi-Wei ; Lopes, José A. M. ; Ludhova, Livia ; Monteiro, Cristina M. B. ; Mulhauser, Françoise ; Nebel, Tobias ; Nez, François ; Rabinowitz, Paul ; Santos, Joaquim M. F. Dos ; Schaller, Lukas A. ; Schuhmann, Karsten ; Schwob, Catherine ; Taqqu, David ; Veloso, João F. C. A. ; Pohl, Randolf

In: Journal of Physics: Conference Series, 2011, vol. 312, no. 3, p. 032002

Is the proton radius a player in the redefinition of the International System of Units

Nez, François ; Antognini, Aldo ; Amaro, Fernando D. ; Biraben, François ; Cardoso, João M. R. ; Covita, Daniel S. ; Dax, Andreas ; Dhawan, Satish ; Fernandes, LuisM. P. ; Giesen, Adolf ; Graf, Thomas ; Hänsch, Theodor W. ; Indelicato, Paul ; Julien, Lucile ; Kao, Cheng-Yang ; Knowles, Paul E. ; Le Bigot, Eric-Olivier ; Liu, Yi-Wei ; Lopes, José A. M. ; Ludhova, Livia ; Monteiro, Cristina M. B. ; Mulhauser, Françoise ; Nebel, Tobias ; Rabinowitz, Paul ; Santos, Joaquim M. F. Dos ; Schaller, Lukas A. ; Schuhmann, Karsten ; Schwob, Catherine ; Taqqu, David ; Veloso, João F. C. A. ; Kottmann, Franz ; Pohl, Randolf

In: Philosophical Transactions of the Royal Society A, 2011, vol. 369, no. 1953, p. 4064-4077

The Lamb shift in muonic hydrogen

Pohl, Randolf ; Antognini, Aldo ; Nez, François ; Amaro, Fernando D. ; Biraben, François ; Cardoso, João M.R. ; Covita, Daniel S. ; Dax, Andreas ; Dhawan, Satish ; Fernandes, Luis M.P. ; Giesen, Adolf ; Graf, Thomas ; Hänsch, Theodor W. ; Indelicato, Paul ; Julien, Lucile ; Kao, Cheng-Yang ; Knowles, Paul ; Bigot, Eric-Olivier Le ; Liu, Yi-Wei ; Lopes, José A.M. ; Ludhova, Livia ; Monteiro, Cristina M.B. ; Mulhauser, Françoise ; Nebel, Tobias ; Rabinowitz, Paul ; Santos, Joaquim M.F. dos ; Schaller, Lukas A. ; Schuhmann, Karsten ; Schwob, Catherine ; Taqqu, David ; Veloso, João F.C.A. ; Kottmann, Franz

In: Canadian Journal of Physics, 2011, vol. 89, p. 37-45

The long quest for a measurement of the Lamb shift in muonic hydrogen is over. Last year we measured the 2S1/2F=1–2P3/2F=2 energy splitting (Pohl et al., Nature, 466, 213 (2010)) in μp with an experimental accuracy of 15 ppm, twice better than our proposed goal. Using current QED calculations of the fine, hyperfine, QED, and finite...

The size of the proton

Pohl, Randolf ; Antognini, Aldo ; Nez, François ; Amaro, Fernando D. ; Biraben, François ; Cardoso, João M. R. ; Covita, Daniel S. ; Dax, Andreas ; Dhawan, Satish ; Fernandes, Luis M. P. ; Giesen, Adolf ; Graf, Thomas ; Hänsch, Theodor W. ; Indelicato, Paul ; Julien, Lucile ; Kao, Cheng-Yang ; Knowles, Paul E. ; Bigot, Eric-Olivier Le ; Liu, Yi-Wei ; Lopes, José A. M. ; Ludhova, Livia ; Monteiro, Cristina M. B. ; Mulhauser, Françoise ; Nebel, Tobias ; Rabinowitz, Paul ; Santos, Joaquim M. F. dos ; Schaller, Lukas A. ; Schuhmann, Karsten ; Schwob, Catherine ; Taqqu, David ; Veloso, João F. C. A. ; Kottmann, Franz

In: Nature, 2010, vol. 466, p. 213-216