期刊
JOURNAL OF HIGH ENERGY PHYSICS
卷 -, 期 2, 页码 -出版社
SPRINGER
DOI: 10.1007/JHEP02(2013)149
关键词
Phenomenology of Field Theories in Higher Dimensions
资金
- FONCYT [PICT-2010-1737]
- CONICET [PIP 114220100100319]
- EPLANET [PIRSES-2009-GA-246806]
- European Commission [226371]
- UNILHC [PITN-GA-2009-237920]
- GIF
- Gruber foundation
- IRG
- ISF
- Minerva
We present a class of warped extra dimension (composite Higgs) models which conjointly accommodates the t (t) over bar forward-backward asymmetry observed at the Tevatron and the direct CP asymmetry in singly Cabibbo suppressed D decays first reported by the LHCb collaboration. We argue that both asymmetries, if arising dominantly from new physics beyond the Standard Model, hint for a flavor paradigm within partial compositeness models in which the right-handed quarks of the first two generations are not elementary fields but rather composite objects. We show that this class of models is consistent with current data on flavor and CP violating physics, electroweak precision observables, dijet and top pair resonance searches at hadron colliders. These models have several predictions which will be tested in forthcoming experiments. The CP asymmetry in D decays is induced through an effective operator of the form ((u) over barc) V +A((s) over bars) V + A at the charm scale, which implies a larger CP asymmetry in the D-0 -> K+ K- rate relative the D-0 -> pi(+)pi(-)channel. This prediction is distinctive from other Standard Model or dipole-based new physics interpretation of the LHCb result. CP violation in D-(D) over bar mixing as well as an an excess of dijet production of the LHC are also predicted to be observed in a near future. A large top asymmetry originates from the exchange of an axial resonance which dominantly produces left-handed top pairs. As a result a negative contribution to the lepton-based forward-backward asymmetry in t _ t production, as well as (sic)(10%) forward-backward asymmetry in b (b) over bar production above mb (b) over bar similar or equal to 600GeV at the Tevatron is expected.
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