New phases in CP violating B decay asymmetries from mixing to singlet down quarks
Aug, 199326 pages
Published in:
- Phys.Rev.D 49 (1994) 2322-2330
Report number:
- UCI-93-14
Citations per year
Abstract: (APS)
Groups such as E6 with extra SU(2)L singlet down quarks give rise to flavor-changing neutral currents (FCNC's) through the mixing of four or more down quarks. These currents may substantially contribute to the processes of Bd0−B¯d0 and Bs0−B¯s0 mixing, within the allowed range of nonzero values for the four quark mixing parameters. These would then introduce new angles and phases into the CP-violating B decay asymmetries. Other, negative FCNC experiments put limits on these angles. Using a maximum likelihood analysis with contributions from both the standard model and the FCNC's, we find large regions for new physics phases contributing to CP-violating B decay asymmetries. From the bound on the mixing elements, the new singlet down quark might have a mass above the 500 GeV range.- B: nonleptonic decay
- nonleptonic decay: B
- decay: inclusive reaction
- inclusive reaction: decay
- CP: violation
- neutral current: flavor changing
- effective Hamiltonian
- B0 anti-B0: mixing
- Z0: nonleptonic decay
- nonleptonic decay: Z0
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