کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8187140 | 1528781 | 2017 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Single top quark production as a probe of anomalous tqγ and tqZ couplings at the FCC-ee
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موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک هسته ای و انرژی بالا
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
In this paper, a detailed study to probe the top quark Flavour-Changing Neutral Currents (FCNC) tqγ and tqZ at the future eâe+ collider FCC-ee in two different center-of-mass energies of 240 and 350 GeV is presented. A set of useful variables are proposed and used in a multivariate technique to separate signal eâe+âZ/γâtq¯(t¯q) from Standard Model background processes. The study includes a fast detector simulation based on the delphes package to consider the detector effects. The upper limits on the FCNC branching ratios at 95% confidence level (CL) in terms of the integrated luminosity are presented. It is shown that with 300fbâ1 of integrated luminosity of data, FCC-ee would be able to exclude the effective coupling strengths above O(10â4â10â5) which is corresponding to branching fraction of O(0.01â0.001)%. We show that moving to a high-luminosity regime leads to a significant improvement on the upper bounds on the top quark FCNC couplings to a photon or a Z boson.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physics Letters B - Volume 775, 10 December 2017, Pages 25-31
Journal: Physics Letters B - Volume 775, 10 December 2017, Pages 25-31
نویسندگان
Hamzeh Khanpour, Sara Khatibi, Morteza Khatiri Yanehsari, Mojtaba Mohammadi Najafabadi,