تقرير
Evidence for the bottom baryon resonance state Lambda_b* with the CDF II detector
| العنوان: | Evidence for the bottom baryon resonance state Lambda_b* with the CDF II detector |
|---|---|
| المؤلفون: | Gorelov, Igor V. |
| المصدر: | Proceedings of Science, PoS(ICHEP2012)349 |
| سنة النشر: | 2013 |
| المجموعة: | High Energy Physics - Experiment |
| مصطلحات موضوعية: | High Energy Physics - Experiment |
| الوصف: | Using data from proton-antiproton collisions at Ecms=1.96 TeV recorded by the CDF II detector at the Fermilab Tevatron, we present evidence for the excited resonance state Lambda_b* in its fully reconstructed decay mode to Lambda_b0 pi+ pi- where Lambda_b0 -->Lambda_c+ (-->proton K- pi+) pi-. The analysis is based on a data sample corresponding to an integrated luminosity of 9.6/fb collected by an online event selection based on tracks displaced from the proton-antiproton interaction point. The local significance of the observed signal is 4.6 Gaussian sigmas. while the significance of the signal for the search region is 3.5 Gaussian sigmas. The mass of the observed state is found to be 5919.5+-0.35+-1.72 MeV . Comment: 7 pages, 2 figures, 2 tables; talk made on behalf of the CDF Collaboration at ICHEP 2012, July 4-11, 2012, Melbourne, Australia |
| نوع الوثيقة: | Working Paper |
| URL الوصول: | http://arxiv.org/abs/1301.0949 |
| رقم الأكسشن: | edsarx.1301.0949 |
| قاعدة البيانات: | arXiv |
| الوصف غير متاح. |