تقرير
Measurement of Muon Capture on the Proton to 1% Precision and Determination of the Pseudoscalar Coupling g_P
| العنوان: | Measurement of Muon Capture on the Proton to 1% Precision and Determination of the Pseudoscalar Coupling g_P |
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| المؤلفون: | Andreev, V. A., Banks, T. I., Carey, R. M., Case, T. A., Clayton, S. M., Crowe, K. M., Deutsch, J., Egger, J., Freedman, S. J., Ganzha, V. A., Gorringe, T., Gray, F. E., Hertzog, D. W., Hildebrandt, M., Kammel, P., Kiburg, B., Knaack, S., Kravtsov, P. A., Krivshich, A. G., Lauss, B., Lynch, K. R., Maev, E. M., Maev, O. E., Mulhauser, F., Petitjean, C., Petrov, G. E., Prieels, R., Schapkin, G. N., Semenchuk, G. G., Soroka, M. A., Tishchenko, V., Vasilyev, A. A., Vorobyov, A. A., Vznuzdaev, M. E., Winter, P. |
| المصدر: | Phys. Rev. Lett. 110, 012504 (2013) |
| سنة النشر: | 2012 |
| المجموعة: | High Energy Physics - Experiment Nuclear Experiment |
| مصطلحات موضوعية: | Nuclear Experiment, High Energy Physics - Experiment |
| الوصف: | The MuCap experiment at the Paul Scherrer Institute has measured the rate L_S of muon capture from the singlet state of the muonic hydrogen atom to a precision of 1%. A muon beam was stopped in a time projection chamber filled with 10-bar, ultra-pure hydrogen gas. Cylindrical wire chambers and a segmented scintillator barrel detected electrons from muon decay. L_S is determined from the difference between the mu- disappearance rate in hydrogen and the free muon decay rate. The result is based on the analysis of 1.2 10^10 mu- decays, from which we extract the capture rate L_S = (714.9 +- 5.4(stat) +- 5.1(syst)) s^-1 and derive the proton's pseudoscalar coupling g_P(q^2_0 = -0.88 m^2_mu) = 8.06 +- 0.55. Comment: Updated figure 1 and small changes in wording to match published version |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevLett.110.012504 |
| URL الوصول: | http://arxiv.org/abs/1210.6545 |
| رقم الأكسشن: | edsarx.1210.6545 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevLett.110.012504 |
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