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2011

Color-octet scalars and potentially large CP violation at the LHC

He, Xiao-Gang, Valencia, German, Yokoya, Hiroshi

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We consider the phenomenology of CP violation in a color-octet extended scalar sector for t\bar{t} production and decay at the LHC.

In particular we study the effect of the two neutral color-octet scalars S_I and S_R that occur in the model.
There are two new sources of CP violation: a phase in the couplings of S_{I,R} to top-quarks; and two phases in the quartic couplings of the scalar potential.
In resonant production of a single S_{I,R} followed by its decay into t\bar{t} pairs through the parton level process gg to S_{I,R} to t\bar{t}, we find large raw CP asymmetries which can reach 12%.

Color-octet scalars and potentially large CP violation at the LHC · Around

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