Weak-triplet, color-octet scalars and the CDF dijet excess
- Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States). Theoretical Physics Dept.
- Johns Hopkins Univ., Baltimore, MD (United States). Department of Physics and Astronomy
We extend the standard model to include a weak-triplet and color-octet scalar. This 'octo-triplet' field consists of three particles, two charged and one neutral, whose masses and renormalizable interactions depend only on two new parameters. The charged octo-triplet decay into a W boson and a gluon is suppressed by a loop factor and an accidental cancellation. Thus, the main decays of the charged octo-triplet may occur through higher-dimensional operators, mediated by a heavy vectorlike fermion, into quark pairs. For an octo-triplet mass below the tb¯ threshold, the decay into Wb b¯ through an off-shell top quark has a width comparable to that into cs¯ or cb¯. Pair production with one octo-triplet decaying to two jets and the other decaying to a W and two soft b jets may explain the dijet-plus-W excess reported by the CDF Collaboration. The same higher-dimensional operators lead to CP violation in Bs-B¯s mixing.
- Research Organization:
- Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- Grant/Contract Number:
- AC02-07CH11359
- OSTI ID:
- 1012423
- Alternate ID(s):
- OSTI ID: 1098797
- Report Number(s):
- FERMILAB-PUB-11-141-T; arXiv eprint number arXiv:1104.2893; TRN: US1102279
- Journal Information:
- Physical Review. D, Particles, Fields, Gravitation and Cosmology, Vol. 85, Issue 7; ISSN 1550-7998
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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