کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1853518 | 1034275 | 2008 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Possible indications of new physics in Bd-mixing and in sin(2β) determinations
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موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک هسته ای و انرژی بالا
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چکیده انگلیسی
Using the hadronic matrix elements from the lattice, BK and ξs, involving only the 4-quark operators for Î flavor=2 Hamiltonian relevant for K-K¯, Bd-B¯d and Bs-B¯s mixing, along with Vcb, we deduce a non-trivial constraint on the SM, sin(2β)=0.87±0.09. This deviates from direct experimental measurements via the tree process, bâcc¯s as well as the one via the penguin-loop bâs decays by around 2.1 and 2.7Ï respectively. If these deviations are confirmed they would imply the presence of new physics rather pervasively in both Bd-B¯d (i.e. very likely in bâd) as well as in bâs transitions requiring a beyond the SM CP-odd phase. Consequently, improvements in the relevant lattice calculations should be given a high priority.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physics Letters B - Volume 666, Issue 2, 14 August 2008, Pages 162-165
Journal: Physics Letters B - Volume 666, Issue 2, 14 August 2008, Pages 162-165
نویسندگان
Enrico Lunghi, Amarjit Soni,