تقرير
Measurement of {\eta} meson production in {\gamma}{\gamma} interactions and {\Gamma}({\eta}-->{\gamma}{\gamma}) with the KLOE detector
| العنوان: | Measurement of {\eta} meson production in {\gamma}{\gamma} interactions and {\Gamma}({\eta}-->{\gamma}{\gamma}) with the KLOE detector |
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| المؤلفون: | Collaboration, KLOE-2, Babusci, D., Badoni, D., Balwierz-Pytko, I., Bencivenni, G., Bini, C., Bloise, C., Bossi, F., Branchini, P., Budano, A., Balkestaahl, L. Caldeira, Capon, G., Ceradini, F., Ciambrone, P., Czerwinski, E., Dane, E., De Lucia, E., De Robertis, G., De Santis, A., Di Domenico, A., Di Donato, C., Di Salvo, R., Domenici, D., Erriquez, O., Fanizzi, G., Fantini, A., Felici, G., Fiore, S., Franzini, P., Gauzzi, P., Giardina, G., Giovannella, S., Gonnella, F., Graziani, E., Happacher, F., Heijkenskj, L., Hoistad, B., Iafolla, L., Jacewicz, M., Johansson, T., Kupsc, A., Lee-Franzini, J., Leverington, B., Loddo, F., Loffredo, S., Mandaglio, G., Martemianov, M., Martini, M., Mascolo, M., Messi, R., Miscetti, S., Morello, G., Moricciani, D., Moskal, P., Nguyen, F., Passeri, A., Patera, V., Longhi, I. Prado, Ranieri, A., Redmer, C. F., Santangelo, P., Sarra, I., Schioppa, M., Sciascia, B., Silarski, M., Taccini, C., Tortora, L., Venanzoni, G., Wislicki, W., Wolke, M., Zdebik, J. |
| سنة النشر: | 2012 |
| المجموعة: | High Energy Physics - Experiment |
| مصطلحات موضوعية: | High Energy Physics - Experiment |
| الوصف: | We present a measurement of {\eta} meson production in photon-photon interactions produced by electron-positron beams colliding with \sqrt{s}=1 GeV. The measurement is done with the KLOE detector at the \phi-factory DA{\Phi}NE with an integrated luminosity of 0.24 fb^{-1}. The e^+e^- --> e^+e^-{\eta} cross section is measured without detecting the outgoing electron and positron, selecting the decays {\eta}-->{\pi}^+{\pi}^-{\pi}^0 and {\eta}-->{\pi}^0{\pi}^0{\pi}^0. The most relevant background is due to e^+e^- --> {\eta}{\gamma} when the monochromatic photon escapes detection. The cross section for this process is measured as {\sigma}(e^+e^- -->{\eta}{\gamma}) = (856 \pm 8_{stat} \pm 16_{syst}) pb. The combined result for the e^+e^- -->e^+e^-{\eta} cross section is {\sigma}(e^+e^- -->e^+e^-{\eta}) = (32.72 \pm 1.27_{stat} \pm 0.70_{syst}) pb. From this we derive the partial width {\Gamma}({\eta}-->{\gamma}{\gamma}) = (520 \pm 20_{stat} \pm 13_{syst}) eV. This is in agreement with the world average and is the most precise measurement to date. Comment: Version accepted by JHEP |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1007/JHEP01(2013)119 |
| URL الوصول: | http://arxiv.org/abs/1211.1845 |
| رقم الأكسشن: | edsarx.1211.1845 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1007/JHEP01(2013)119 |
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