The Fourth family: A Natural explanation for the observed pattern of anomalies in $B^-$ CP asymmetries - INSPIRE

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The Fourth family: A Natural explanation for the observed pattern of anomalies in $B^-$ CP asymmetries

Amarjit Soni
(
- Brookhaven
)
,
Ashutosh Kumar Alok
(
- Tata Inst.
)
,
Anjan Giri
(
- Punjabi U.
)
,
Rukmani Mohanta
(
- Hyderabad U.
)
,
Soumitra Nandi
(
- Harish-Chandra Res. Inst.
)

Jul, 2008

5 pages

Published in:

Phys.Lett.B 683 (2010) 302-305

e-Print:

0807.1971 [hep-ph]

DOI:

10.1016/j.physletb.2009.12.048

View in:

ADS Abstract Service

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Abstract: (Elsevier)

We show that a fourth family of quarks with mt′ in the range of (400–600) GeV provides a rather simple explanation for the several indications of new physics that have been observed involving CP asymmetries of the b -quark. The built-in hierarchy of the 4×4 mixing matrix is such that the t′ readily provides a needed perturbation ( ≈15% ) to sin2β as measured in B→ψKs and simultaneously is the dominant source of CP asymmetry in Bs→ψϕ . The correlation between CP asymmetries in Bs→ψϕ and Bd→ϕKs suggests mt′≈(400–600) GeV . Such heavy masses point to the tantalizing possibility that the 4th family plays an important role in the electroweak symmetry breaking.

B: hadronic decay
B/s: hadronic decay
B: decay modes
CP: violation
top
family: 4
quark: mass
CKM matrix matrix: unitarity
effective Hamiltonian
electroweak interaction: symmetry breaking

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