Is the beauty-up quarks coupling definitely non-zero?

Flavour changing gluonic current (FCGC) induced by loops could explain the recent measurements B −→p pπ −, B 0→ p pπ +π − even if the beauty-up quarks coupling ( V bu ) is strictly vanishing. The inclusive branching ratio b→dq q (q stands for u and d quarks) is computed to be 3×10 −3, from five to t...

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Bibliographic Details
Published in:Physics letters. B 1988-03, Vol.202 (3), p.388-392
Main Authors: Łukaszuk, L., Pham, X.Y., Vu Xuan, C.
Format: Article
Language:English
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Summary:Flavour changing gluonic current (FCGC) induced by loops could explain the recent measurements B −→p pπ −, B 0→ p pπ +π − even if the beauty-up quarks coupling ( V bu ) is strictly vanishing. The inclusive branching ratio b→dq q (q stands for u and d quarks) is computed to be 3×10 −3, from five to ten times the above exclusive modes. Since the CP violation mechanism of the standard theory is based on a strict non-zero value of V bu , the point arosen is of great importance and still cannot be unambiguously settled. Some tests of the FCGC mechanism are finally suggested to answer the question.
ISSN:0370-2693
1873-2445
DOI:10.1016/0370-2693(88)90491-1