Zobrazeno 1 - 10
of 236
pro vyhledávání: '"Taqqu D."'
Autor:
Antognini, A., Ayres, N. J., Belosevic, I., Bondar, V., Eggenberger, A., Hildebrandt, M., Iwai, R., Kirch, K., Knecht, A., Lospalluto, G., Nuber, J., Papa, A., Sakurai, M., Solovyev, I., Taqqu, D., Yan, T.
We present the first demonstration of simultaneous phase space compression in two spatial dimensions of a positive muon beam, the first stage of the novel high-brightness muon beam under development by the muCool collaboration at the Paul Scherrer In
Externí odkaz:
http://arxiv.org/abs/2410.21162
Autor:
Nuber, J., Adamczak, A., Ahmed, M. Abdou, Affolter, L., Amaro, F. D., Amaro, P., Carvalho, P., Chang, Y. -H., Chen, T. -L., Chen, W. -L., Fernandes, L. M. P., Ferro, M., Goeldi, D., Graf, T., Guerra, M., Hänsch, T. W., Henriques, C. A. O., Hildebrandt, M., Indelicato, P., Kara, O., Kirch, K., Knecht, A., Kottmann, F., Liu, Y. -W., Machado, J., Marszalek, M., Mano, R. D. P., Monteiro, C. M. B., Nez, F., Ouf, A., Paul, N., Pohl, R., Rapisarda, E., Santos, J. M. F. dos, Santos, J. P., Silva, P. A. O. C., Sinkunaite, L., Shy, J. -T., Schuhmann, K., Rajamohanan, S., Soter, A., Sustelo, L., Taqqu, D., Wang, L. -B., Wauters, F., Yzombard, P., Zeyen, M., Zhang, J., Antognini, A.
The CREMA collaboration is pursuing a measurement of the ground-state hyperfine splitting (HFS) in muonic hydrogen ($\mu$p) with 1 ppm accuracy by means of pulsed laser spectroscopy. In the proposed experiment, the $\mu$p atom is excited by a laser p
Externí odkaz:
http://arxiv.org/abs/2211.08297
Autor:
Antognini, A., Crivelli, P., Gerchow, L., Hume, T. D., Kirch, K., Knecht, A., Nuber, J., Papa, A., Ritjoho, N., Sakurai, M., Soter, A., Taqqu, D., Vogiatzi, S. M., Zhang, J., Ziegler, L.
A low-emittance, high-intensity atomic beam of muonium ($\mathrm{M}=\mu^+ + \mathrm{e}^-$) using superfluid helium as muon-to-muonium converter is being developed at the Paul Scherrer Institute (PSI). This beam could advance laser spectroscopy of muo
Externí odkaz:
http://arxiv.org/abs/2208.11491
Autor:
Antognini A., Schuhmann K., Amaro F. D., Amaro P., Abdou-Ahmed M., Biraben F., Chen T.-L., Covita D. S., Dax A. J., Diepold M., Fernandes L. M. P., Franke B., Galtier S., Gouvea A. L., Götzfried J., Graf T., Hänsch T. W., Hildebrandt M., Indelicato P., Julien L., Kirch K., Knecht A., Kottmann F., Krauth J. J., Liu Y.-W., Machado J., Monteiro C. M. B., Mulhauser F., Nez F., Santos J. P., dos Santos J. M. F., Szabo C. I., Taqqu D., Veloso J. F. C. A., Voss A., Weichelt B., Pohl R.
Publikováno v:
EPJ Web of Conferences, Vol 113, p 01006 (2016)
We review the status of the proton charge radius puzzle. Emphasis is given to the various experiments initiated to resolve the conflict between the muonic hydrogen results and the results from scattering and regular hydrogen spectroscopy.
Externí odkaz:
https://doaj.org/article/e7e88b91b57a4b1991447fad75f2d1ba
Autor:
Amaro, P., Adamczak, A., Ahmed, M. Abdou, Affolter, L., Amaro, F. D., Carvalho, P., Chen, T. -L., Fernandes, L. M. P., Ferro, M., Goeldi, D., Graf, T., Guerra, M., Hänsch, T. W., Henriques, C. A. O., Huang, Y. -C., Indelicato, P., Kara, O., Kirch, K., Knecht, A., Kottmann, F., Liu, Y. -W., Machado, J., Marszalek, M., Mano, R. D. P., Monteiro, C. M. B., Nez, F., Nuber, J., Ouf, A., Paul, N., Pohl, R., Rapisarda, E., Santos, J. M. F. dos, Santos, J. P., Silva, P. A. O. C., Sinkunaite, L., Shy, J. -T., Schuhmann, K., Rajamohanan, S., Soter, A., Sustelo, L., Taqqu, D., Wang, L. -B., Wauters, F., Yzombard, P., Zeyen, M., Antognini, A.
Publikováno v:
SciPost Phys. 13, 020 (2022)
The CREMA collaboration is pursuing a measurement of the ground-state hyperfine splitting (HFS) in muonic hydrogen ($\mu$p) with 1 ppm accuracy by means of pulsed laser spectroscopy to determine the two-photon-exchange contribution with $2\times10^{-
Externí odkaz:
http://arxiv.org/abs/2112.00138
Autor:
Antognini, A., Ayres, N. J., Belosevic, I., Bondar, V., Eggenberger, A., Hildebrandt, M., Iwai, R., Kaplan, D. M., Khaw, K. S., Kirch, K., Knecht, A., Papa, A., Petitjean, C., Phillips, T. J., Piegsa, F. M., Ritjoho, N., Stoykov, A., Taqqu, D., Wichmann, G.
Publikováno v:
Phys. Rev. Lett. 125, 164802 (2020)
We demonstrate efficient transverse compression of a 12.5 MeV/c muon beam stopped in a helium gas target featuring a vertical density gradient and crossed electric and magnetic fields. The muon stop distribution extending vertically over 14 mm was re
Externí odkaz:
http://arxiv.org/abs/2003.11986
Autor:
Belosevic, I., Antognini, A., Bao, Y., Eggenberger, A., Hildebrandt, M., Iwai, R., Kaplan, D. M., Khaw, K. S., Kirch, K., Knecht, A., Papa, A., Petitjean, C., Phillips, T. J., Piegsa, F. M., Ritjoho, N., Stoykov, A., Taqqu, D., Wichmann, G.
Publikováno v:
Hyperfine Interact (2019) 240: 41
Experiments with muons ($\mu^{+}$) and muonium atoms ($\mu^{+}e^{-}$) offer several promising possibilities for testing fundamental symmetries. Examples of such experiments include search for muon electric dipole moment, measurement of muon $g-2$ and
Externí odkaz:
http://arxiv.org/abs/1901.04886
Autor:
Antognini, A., Bao, Y., Belosevic, I., Eggenberger, A., Hildebrandt, M., Iwai, R., Kaplan, D. M., Khaw, K. S., Kirch, K., Knecht, A., Papa, A., Petitjean, C., Phillips, T. J., Piegsa, F. M., Ritjoho, N., Stoykov, A., Taqqu, D., Wichmann, G.
Publikováno v:
Eur. Phys. J. C (2019) 79: 430
A novel device to compress the phase space of a muon beam by a factor of $10^{10}$ with a $10^{-3}$ efficiency is under development. A surface muon beam is stopped in a helium gas target consisting of several compression stages, wherein strong electr
Externí odkaz:
http://arxiv.org/abs/1811.08332
Autor:
Schmidt, S., Willig, M., Haack, J., Horn, R., Adamczak, A., Ahmed, M. Abdou, Amaro, F. D., Amaro, P., Biraben, F., Carvalho, P., Chen, T. -L., Fernandes, L. M. P., Graf, T., Guerra, M., Hänsch, T. W., Hildebrandt, M., Huang, Y. -C., Indelicato, P., Julien, L., Kirch, K., Knecht, A., Kottmann, F., Krauth, J. J., Liu, Y. -W., Machado, J., Marszalek, M., Monteiro, C. M. B., Nez, F., Nuber, J., Patel, D. N., Rapisarda, E., Santos, J. M. F. dos, Santos, J. P., Silva, P. A. O. C., Sinkunaite, L., Shy, J. -T., Schuhmann, K., Schulthess, I., Taqqu, D., Veloso, J. F. C. A., Wang, L. -B., Zeyen, M., Antognini, A., Pohl, R.
Precision spectroscopy of light muonic atoms provides unique information about the atomic and nuclear structure of these systems and thus represents a way to access fundamental interactions, properties and constants. One application comprises the det
Externí odkaz:
http://arxiv.org/abs/1808.07240
Autor:
Krauth, J. J., Schuhmann, K., Ahmed, M. Abdou, Amaro, F. D., Amaro, P., Biraben, F., Cardoso, J. M. R., Carvalho, M. L., Covita, D. S., Dax, A., Dhawan, S., Diepold, M., Fernandes, L. M. P., Franke, B., Galtier, S., Giesen, A., Gouvea, A. L., Götzfried, J., Graf, T., Guerra, M., Haack, J., Hänsch, T. W., Hildebrandt, M., Indelicato, P., Julien, L., Kirch, K., Knecht, A., Knowles, P., Kottmann, F., Bigot, E. -O. Le, Liu, Y. -W., Lopes, J. A. M., Ludhova, L., Machado, J., Monteiro, C. M. B., Mulhauser, F., Nebel, T., Nez, F., Rabinowitz, P., Rapisarda, E., Santos, J. M. F. dos, Santos, J. P., Schaller, L. A., Schwob, C., Szabo, C. I., Taqqu, D., Veloso, J. F. C. A., Voss, A., Weichelt, B., Willig, M., Pohl, R., Antognini, A.
Publikováno v:
52nd Rencontres de Moriond on EW Interactions and Unified Theories, Mar 2017, La Thuile, Italy. pp.95-102
High-precision measurements of the proton radius from laser spectroscopy of muonic hydrogen demonstrated up to six standard deviations smaller values than obtained from electron-proton scattering and hydrogen spectroscopy. The status of this discrepa
Externí odkaz:
http://arxiv.org/abs/1706.00696