کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1848763 | 1528085 | 2013 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Standard Model updates and new physics analysis with the Unitarity Triangle fit
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موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک هسته ای و انرژی بالا
پیش نمایش صفحه اول مقاله
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چکیده انگلیسی
We present the summer 2012 update of the Unitarity Triangle (UT) analysis performed by the UTfit Collaboration within the Standard Model (SM) and beyond. The increased accuracy on several of the fundamental constraints is now enhancing some of the tensions amongst and within the constraint themselves. In particular, the long standing tension between exclusive and inclusive determinations of the Vub and Vcb CKM matrix elements is now playing a major role. Then we present the generalisation the UT analysis to investigate new physics (NP) effects, updating the constraints on NP contributions to ÎF=2 processes. In the NP analysis, both CKM and NP parameters are fitted simultaneously to obtain the possible NP effects in any specific sector. Finally, based on the NP constraints, we derive upper bounds on the coefficients of the most general ÎF=2 effective Hamiltonian. These upper bounds can be translated into lower bounds on the scale of NP that contributes to these low-energy effective interactions.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Physics B - Proceedings Supplements - Volumes 241â242, AugustâSeptember 2013, Pages 89-94
Journal: Nuclear Physics B - Proceedings Supplements - Volumes 241â242, AugustâSeptember 2013, Pages 89-94
نویسندگان
A. Bevan, M. Bona, M. Ciuchini, D. Derkach, E. Franco, L. Silvestrini, V. Lubicz, C. Tarantino, G. Martinelli, F. Parodi, C. Schiavi, M. Pierini, V. Sordini, A. Stocchi, V. Vagnoni,