تقرير
Two Photon Decays of $\eta_c$ from Lattice QCD
| العنوان: | Two Photon Decays of $\eta_c$ from Lattice QCD |
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| المؤلفون: | Chen, Ting, Chen, Ying, Gong, Ming, Lei, Yu-Hong, Li, Ning, Liu, Chuan, Liu, Yu-Bin, Liu, Zhaofeng, Ma, Jian-Ping, Qiu, Wei-Feng, Wang, Zhan-Lin, Zhang, Jian-Bo |
| سنة النشر: | 2016 |
| المجموعة: | High Energy Physics - Lattice |
| مصطلحات موضوعية: | High Energy Physics - Lattice |
| الوصف: | We present an exploratory lattice study for the two-photon decay of $\eta_c$ using $N_f=2$ twisted mass lattice QCD gauge configurations generated by the European Twisted Mass Collaboration. Two different lattice spacings of $a=0.067$fm and $a=0.085$fm are used in the study, both of which are of physical size of 2$fm$. The decay widths are found to be $1.025(5)$KeV for the coarser lattice and $1.062(5)$KeV for the finer lattice respectively where the errors are purely statistical. A naive extrapolation towards the continuum limit yields $\Gamma\simeq 1.122(14)$KeV which is smaller than the previous quenched result and most of the current experimental results. Possible reasons are discussed. Comment: 13 pages, 7 figures; matches the published version |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1140/epjc/s10052-016-4212-8 |
| URL الوصول: | http://arxiv.org/abs/1602.00076 |
| رقم الأكسشن: | edsarx.1602.00076 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1140/epjc/s10052-016-4212-8 |
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