Higgs mass constraints on a fourth family: Upper and lower limits on CKM mixing
Abstract
Limits on the Higgs boson mass restrict Cabibbo-Kobayashi-Maskawa quark-mixing matrix (CKM) mixing of a possible fourth family beyond the constraints previously obtained from precision electroweak data alone. Existing experimental and theoretical bounds on mH already significantly restrict the allowed parameter space. Zero CKM mixing is excluded and mixing of order θCabbibo is allowed. Upper and lower limits on 3-4 CKM mixing are exhibited as a function of mH. We use the default inputs of the electroweak working group and also explore the sensitivity of both the three and four family fits to alternative inputs.
- Publication:
-
Physical Review D
- Pub Date:
- August 2010
- DOI:
- 10.1103/PhysRevD.82.035018
- arXiv:
- arXiv:1007.0043
- Bibcode:
- 2010PhRvD..82c5018C
- Keywords:
-
- 12.60.-i;
- 14.80.Bn;
- Models beyond the standard model;
- Standard-model Higgs bosons;
- High Energy Physics - Phenomenology;
- High Energy Physics - Experiment
- E-Print:
- Adds discussion of alternative fourth family masses, including new best fit, and reconciles with published version