کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5494783 1528783 2017 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Role of tensor operators in RK and RK⁎
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک هسته ای و انرژی بالا
پیش نمایش صفحه اول مقاله
Role of tensor operators in RK and RK⁎
چکیده انگلیسی

The recent LHCb measurement of RK⁎ in two q2 bins, when combined with the earlier measurement of RK, strongly suggests lepton flavour non-universal new physics in semi-leptonic B meson decays. Motivated by these intriguing hints of new physics, several authors have considered vector, axial vector, scalar and pseudo scalar operators as possible explanations of these measurements. However, tensor operators have widely been neglected in this context. In this paper, we consider the effect of tensor operators in RK and RK⁎. We find that, unlike other local operators, tensor operators can comfortably produce both of RK⁎low and RK⁎central close to their experimental central values. However, a simultaneous explanation of RK is not possible with only Tensor operators, and other vector or axial vector operators are needed. In fact, we find that combination of vector and tensor operators can provide simultaneous explanations of all the anomalies comfortably at the 1σ level, a scenario which is hard to achieve with only vector or axial vector operators. We also comment on the compatibility of the various new physics solutions with the measurements of the inclusive decay Bd→Xsℓ+ℓ−.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physics Letters B - Volume 773, 10 October 2017, Pages 505-512
نویسندگان
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